Merge branch 'cherry-pick-6685381f' into 'dev'

another bulk of composer updates

See merge request hubzilla/core!1781

453 files changed, 14200 insertions, 15949 deletions

diff --git a/vendor/sabre/dav/.gitignore b/vendor/sabre/dav/.gitignore
index 6cf245883..499f7b689 100644
--- a/vendor/sabre/dav/.gitignore
+++ b/vendor/sabre/dav/.gitignore
@@ -41,3 +41,5 @@ docs/wikidocs
 
 # Mac
 .DS_Store
+
+.php_cs.cache
diff --git a/vendor/sabre/dav/.php_cs.dist b/vendor/sabre/dav/.php_cs.dist
new file mode 100644
index 000000000..8d61ee259
--- /dev/null
+++ b/vendor/sabre/dav/.php_cs.dist
@@ -0,0 +1,12 @@
+<?php
+
+$config = PhpCsFixer\Config::create();
+$config->getFinder()
+    ->exclude('vendor')
+    ->in(__DIR__);
+$config->setRules([
+    '@PSR1' => true,
+    '@Symfony' =>true
+]);
+
+return $config;
\ No newline at end of file
diff --git a/vendor/sabre/dav/.travis.yml b/vendor/sabre/dav/.travis.yml
index 85637048a..c98ea59ef 100644
--- a/vendor/sabre/dav/.travis.yml
+++ b/vendor/sabre/dav/.travis.yml
@@ -1,35 +1,51 @@
 language: php
+sudo: required
 php:
-  - 5.5
-  - 5.6
   - 7.0
   - 7.1
-
+  - 7.2
+  - 7.3
 
 env:
+  global:
+    - SABRE_MYSQLUSER="root"
+    - SABRE_MYSQLPASS=""
+    - SABRE_MYSQLDSN="mysql:host=127.0.0.1;dbname=sabredav_test"
+    - RUN_PHPSTAN="FALSE"
   matrix:
-    - LOWEST_DEPS="" TEST_DEPS=""
-    - LOWEST_DEPS="--prefer-lowest" TEST_DEPS="tests/Sabre/"
+    - LOWEST_DEPS="" TEST_DEPS="" WITH_COVERAGE="--coverage-clover=coverage.xml"
+    - LOWEST_DEPS="--prefer-lowest" TEST_DEPS="tests/Sabre/" $WITH_COVERAGE=""
+
+matrix:
+  include:
+    - name: 'PHPStan'
+      php: 7.2
+      env: RUN_PHPSTAN="TRUE"
 
 services:
   - mysql
   - postgresql
 
-sudo: false
+install:
+  - if [ $RUN_PHPSTAN == "TRUE"  ]; then wget https://github.com/phpstan/phpstan/releases/download/0.11.8/phpstan.phar; fi
 
 before_script:
-  - mysql -e 'create database sabredav_test'
+#  - mysql -u root -h 127.0.0.1 sabredav_test -e 'SELECT VERSION();'
+#- mysql -u root -h 127.0.0.1 -e 'create database sabredav_test'
   - psql -c "create database sabredav_test" -U postgres
   - psql -c "create user sabredav with PASSWORD 'sabredav';GRANT ALL PRIVILEGES ON DATABASE sabredav_test TO sabredav" -U postgres
-  #  - composer self-update
   - composer update --prefer-dist $LOWEST_DEPS
 
-# addons:
-#    postgresql: "9.5"
+addons:
+  postgresql: "9.5"
 
 script:
-  - ./bin/phpunit --configuration tests/phpunit.xml.dist $TEST_DEPS
-  - ./bin/sabre-cs-fixer fix . --dry-run --diff
+  - if [ $RUN_PHPSTAN == "FALSE"  ]; then ./bin/phpunit --verbose --configuration tests/phpunit.xml.dist $WITH_COVERAGE $TEST_DEPS; fi
+  - if [ $RUN_PHPSTAN == "FALSE"  ]; then rm -f ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini; fi
+  - if [ $RUN_PHPSTAN == "TRUE"  ]; then php phpstan.phar analyse -c phpstan.neon lib; fi
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
 
 cache:
   directories:
diff --git a/vendor/sabre/dav/CHANGELOG.md b/vendor/sabre/dav/CHANGELOG.md
index cda2564e1..455b3ae5e 100644
--- a/vendor/sabre/dav/CHANGELOG.md
+++ b/vendor/sabre/dav/CHANGELOG.md
@@ -1,11 +1,124 @@
 ChangeLog
 =========
 
-3.2.3 (2018-10-19)
+4.0.2 (2019-10-18)
+-------------------------
+* Fix error with PHP 7.4
+* CardDAV: Fix content-type for Thunderbird
+
+
+4.0.1 (2019-08-20)
+-------------------------
+* TemporaryFileFilterPlugin: Fix Strict Error
+* CalDAV\Plugin: Fix null path
+
+
+4.0.0 (2019-07-01)
+-------------------------
+* Lock: Support lock timeout value Infinity 
+* Lock: Hide lock token in lock discovery when not set
+* BrowserPlugin: Show display name of nodes
+* FSExt: Fix folder (file) move issue if rename fails
+* IMipPlugin: Add sender name in invite mail headers
+* IMipPlugin: Fix email subject and recipient 
+* Fix issues with empty content-type header
+* Apply new code style
+* Fix for litmus test suite - test case: props propfind_invalid2
+* Depend on sabre/xml 2.0.1
+* Depend on sabre/http 5.0
+* Now supports PHP 7.3
+* Now requires PHP 7.
+* Using `strict_types` in every php file.
+* #896: Using the [sabre/event][evnt] `WildcardEmitter`. This allows event
+  handlers to listen to events using a wildcard.
+* #896: Event listeners that in the past listened to `beforeMethod` or `method`
+  no longer get called. They must listen to `beforeMethod:*` and `method:*` now.
+* #322: Imap authentication backend. (@c0d3z3r0).
+* #889: Support for selective property querying in CardDAV's addressbook-query.
+ (@DeepDiver1975).
+* #982: Make sure that files that are siblings of directories, are reported
+  as files (@nickvergessen)
+
+
+4.0.0-beta1 (2019-05-08)
+-------------------------
+* Lock: Support lock timeout value Infinity 
+* Lock: Hide lock token in lock discovery when not set
+* BrowserPlugin: Show display name of nodes
+* FSExt: Fix folder (file) move issue if rename fails
+* IMipPlugin: Add sender name in invite mail headers
+* IMipPlugin: Fix email subject and recipient 
+
+
+4.0.0-alpha5 (2018-10-15)
+-------------------------
+* Fix issues with empty content-type header
+
+
+4.0.0-alpha4 (2018-10-12)
+-------------------------
+* Apply new code style
+* Fix for litmus test suite - test case: props propfind_invalid2
+* Depend on sabre/xml 2.0.1
+
+
+4.0.0-alpha3 (2018-10-05)
+-------------------------
+* Fixes for PHP 7.3
+* Depend on sabre/http 5.0
+
+
+4.0.0-alpha2 (2018-09-27)
+-------------------------
+* Now supports PHP 7.3
+
+
+4.0.0-alpha1 (2018-06-05)
+-------------------------
+
+* Now requires PHP 7.
+* Using `strict_types` in every php file.
+* #896: Using the [sabre/event][evnt] `WildcardEmitter`. This allows event
+  handlers to listen to events using a wildcard.
+* #896: Event listeners that in the past listened to `beforeMethod` or `method`
+  no longer get called. They must listen to `beforeMethod:*` and `method:*` now.
+* #322: Imap authentication backend. (@c0d3z3r0).
+* #889: Support for selective property querying in CardDAV's addressbook-query.
+ (@DeepDiver1975).
+* #982: Make sure that files that are siblings of directories, are reported
+  as files (@nickvergessen)
+  
+
+3.3.0-alpha1 (2018-06-04)
+-------------------------
+
+* SimpleCollection can now take arrays and strings as argument for super
+  simple tree creation.
+* Added `Sabre\DAV\Server::start()`. This replaces `::exec()`. `::exec()`
+  is now deprecated, but we're keeping it around for a year or two to make
+  the transition easier.
+* `getChildren()` function in any collection may now return an iterator
+  instead of an array. This can result in memory savings for large
+  collections.
+* `Tree::getChildren()` now returns an Iterator instead of an array.
+* Added `$overrideName` to all `Sabre\DAV\FS` and `Sabre\DAV\FSExt` classes,
+  so users can specify under what name these nodes show up in the tree.
+* #889 Added support for filtering vCard properties in the addressbook-query
+  REPORT (@DeepDiver1975).
+* #918: Add a lot of sqlite indexes. This should speed up sqlite-based
+  installations quite a bit.
+* #982: Make sure that files that are siblings of directories, are reported
+  as files (@nickvergessen)
+* #1058: Don't open file resource on HEAD request (@icewind1991)
+* #1031: Fix copyNode for case of file named 0 (@phil-davis)
+
+
+3.2.3 (????-??-??)
 ------------------
 
 * #982: Make sure that files that are siblings of directories, are reported
   as files (@nickvergessen)
+  
 
 3.2.2 (2017-02-14)
 ------------------
diff --git a/vendor/sabre/dav/CONTRIBUTING.md b/vendor/sabre/dav/CONTRIBUTING.md
index 425ee19ba..b937db64f 100644
--- a/vendor/sabre/dav/CONTRIBUTING.md
+++ b/vendor/sabre/dav/CONTRIBUTING.md
@@ -78,6 +78,28 @@ to accept the patch, but we'd still really like your contribution!
 To run the testsuite jump into the directory `cd tests` and trigger `phpunit`.
 Make sure you did a `composer install` beforehand.
 
+Release process
+---------------
+
+Generally, these are the steps taken to do releases.
+
+1. Update the changelog. Every repo will have a `CHANGELOG.md` file. This file
+   should have a new version, and contain all the changes since the last
+   release. I generally run a `git diff` to figure out if I missed any changes.
+   This file should also have the current date.
+2. If there were BC breaks, this usually now means a major version bump.
+3. Ensure that `lib/Version.php` or `lib/DAV/Version.php` also matches this
+   version number.
+4. Tag the release (Example `git tag 3.0.1` and push the tag (`git push --tags`).
+5. (only for the sabre/dav project), create a zip distribution. Run
+   `php bin/build.php`.
+6. For the relevant project, go to github and click the 'releases' tab. On this
+   tab I create the release with the relevant version. I also set the
+   description of the release to the same information of the changelog. In the
+   case of the `sabre/dav` project I also upload the zip distribution here.
+7. Write a blog post on sabre.io. This also automatically updates twitter.
+
+
 [1]: http://www.php-fig.org/psr/psr-1/
 [2]: http://www.php-fig.org/psr/psr-4/
 [3]: http://www.php-fig.org/psr/psr-2/
diff --git a/vendor/sabre/dav/README.md b/vendor/sabre/dav/README.md
index 86a0fe9a6..a06805443 100644
--- a/vendor/sabre/dav/README.md
+++ b/vendor/sabre/dav/README.md
@@ -16,14 +16,14 @@ Build status
 
 | branch       | status | minimum PHP version |
 | ------------ | ------ | ------------------- |
-| master       | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=master)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.5 |
-| 3.1          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=3.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.5 |
-| 3.0          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=3.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
-| 2.1          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=2.1)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
-| 2.0          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=2.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
-| 1.8          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.8)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
-| 1.7          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.7)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
-| 1.6          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.6)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
+| master       | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=master)](https://travis-ci.org/sabre-io/dav) | PHP 7.0 |
+| 3.1          | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=3.0)](https://travis-ci.org/sabre-io/dav) | PHP 5.5 |
+| 3.0          | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=3.0)](https://travis-ci.org/sabre-io/dav) | PHP 5.4 |
+| 2.1          | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=2.1)](https://travis-ci.org/sabre-io/dav) | PHP 5.4 |
+| 2.0          | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=2.0)](https://travis-ci.org/sabre-io/dav) | PHP 5.4 |
+| 1.8          | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=1.8)](https://travis-ci.org/sabre-io/dav) | PHP 5.3 |
+| 1.7          | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=1.7)](https://travis-ci.org/sabre-io/dav) | PHP 5.3 |
+| 1.6          | [![Build Status](https://travis-ci.org/sabre-io/dav.svg?branch=1.6)](https://travis-ci.org/sabre-io/dav) | PHP 5.3 |
 
 Documentation
 -------------
diff --git a/vendor/sabre/dav/bin/build.php b/vendor/sabre/dav/bin/build.php
index c4ba20941..54174a777 100644
--- a/vendor/sabre/dav/bin/build.php
+++ b/vendor/sabre/dav/bin/build.php
@@ -2,7 +2,6 @@
 <?php
 
 $tasks = [
-
     'buildzip' => [
         'init', 'test', 'clean',
     ],
@@ -10,25 +9,29 @@ $tasks = [
         'init', 'test', 'clean',
     ],
     'clean' => [],
-    'test'  => [
+    'test' => [
         'composerupdate',
     ],
-    'init'           => [],
+    'init' => [],
     'composerupdate' => [],
  ];
 
 $default = 'buildzip';
 
-$baseDir = __DIR__ . '/../';
+$baseDir = __DIR__.'/../';
 chdir($baseDir);
 
 $currentTask = $default;
-if ($argc > 1) $currentTask = $argv[1];
+if ($argc > 1) {
+    $currentTask = $argv[1];
+}
 $version = null;
-if ($argc > 2) $version = $argv[2];
+if ($argc > 2) {
+    $version = $argv[2];
+}
 
 if (!isset($tasks[$currentTask])) {
-    echo "Task not found: ",  $currentTask, "\n";
+    echo 'Task not found: ',  $currentTask, "\n";
     die(1);
 }
 
@@ -37,11 +40,9 @@ $newTaskList = [];
 $oldTaskList = [$currentTask => true];
 
 while (count($oldTaskList) > 0) {
-
     foreach ($oldTaskList as $task => $foo) {
-
         if (!isset($tasks[$task])) {
-            echo "Dependency not found: " . $task, "\n";
+            echo 'Dependency not found: '.$task, "\n";
             die(1);
         }
         $dependencies = $tasks[$task];
@@ -55,82 +56,74 @@ while (count($oldTaskList) > 0) {
                 $oldTaskList[$dependency] = true;
                 $fullFilled = false;
             }
-           
         }
         if ($fullFilled) {
             unset($oldTaskList[$task]);
             $newTaskList[$task] = 1;
         }
-
     }
-
 }
 
 foreach (array_keys($newTaskList) as $task) {
-
-    echo "task: " . $task, "\n";
+    echo 'task: '.$task, "\n";
     call_user_func($task);
     echo "\n";
-
 }
 
-function init() {
-
+function init()
+{
     global $version;
     if (!$version) {
-        include __DIR__ . '/../vendor/autoload.php';
+        include __DIR__.'/../vendor/autoload.php';
         $version = Sabre\DAV\Version::VERSION;
     }
 
-    echo "  Building sabre/dav " . $version, "\n";
-
+    echo '  Building sabre/dav '.$version, "\n";
 }
 
-function clean() {
-
+function clean()
+{
     global $baseDir;
     echo "  Removing build files\n";
-    $outputDir = $baseDir . '/build/SabreDAV';
+    $outputDir = $baseDir.'/build/SabreDAV';
     if (is_dir($outputDir)) {
-        system('rm -r ' . $baseDir . '/build/SabreDAV');
+        system('rm -r '.$baseDir.'/build/SabreDAV');
     }
-
 }
 
-function composerupdate() {
-
+function composerupdate()
+{
     global $baseDir;
     echo "  Updating composer packages to latest version\n\n";
-    system('cd ' . $baseDir . '; composer update');
+    system('cd '.$baseDir.'; composer update');
 }
 
-function test() {
-
+function test()
+{
     global $baseDir;
 
     echo "  Running all unittests.\n";
     echo "  This may take a while.\n\n";
-    system(__DIR__ . '/phpunit --configuration ' . $baseDir . '/tests/phpunit.xml.dist --stop-on-failure', $code);
-    if ($code != 0) {
+    system(__DIR__.'/phpunit --configuration '.$baseDir.'/tests/phpunit.xml.dist --stop-on-failure', $code);
+    if (0 != $code) {
         echo "PHPUnit reported error code $code\n";
         die(1);
     }
-   
 }
 
-function buildzip() {
-
+function buildzip()
+{
     global $baseDir, $version;
     echo "  Generating composer.json\n";
 
-    $input = json_decode(file_get_contents(__DIR__ . '/../composer.json'), true);
+    $input = json_decode(file_get_contents(__DIR__.'/../composer.json'), true);
     $newComposer = [
-        "require" => $input['require'],
-        "config"  => [
-            "bin-dir" => "./bin",
+        'require' => $input['require'],
+        'config' => [
+            'bin-dir' => './bin',
         ],
-        "prefer-stable"     => true,
-        "minimum-stability" => "alpha",
+        'prefer-stable' => true,
+        'minimum-stability' => 'alpha',
     ];
     unset(
         $newComposer['require']['sabre/vobject'],
@@ -143,8 +136,8 @@ function buildzip() {
     file_put_contents('build/SabreDAV/composer.json', json_encode($newComposer, JSON_PRETTY_PRINT));
 
     echo "  Downloading dependencies\n";
-    system("cd build/SabreDAV; composer install -n", $code);
-    if ($code !== 0) {
+    system('cd build/SabreDAV; composer install -n', $code);
+    if (0 !== $code) {
         echo "Composer reported error code $code\n";
         die(1);
     }
@@ -163,15 +156,14 @@ function buildzip() {
     ];
     foreach ($fileNames as $fileName) {
         echo "    $fileName\n";
-        rename('build/SabreDAV/vendor/sabre/dav/' . $fileName, 'build/SabreDAV/' . $fileName);
+        rename('build/SabreDAV/vendor/sabre/dav/'.$fileName, 'build/SabreDAV/'.$fileName);
     }
 
     // <zip destfile="build/SabreDAV-${sabredav.version}.zip" basedir="build/SabreDAV" prefix="SabreDAV/" />
 
     echo "\n";
     echo "Zipping the sabredav distribution\n\n";
-    system('cd build; zip -qr sabredav-' . $version . '.zip SabreDAV');
-
-    echo "Done.";
+    system('cd build; zip -qr sabredav-'.$version.'.zip SabreDAV');
 
+    echo 'Done.';
 }
diff --git a/vendor/sabre/dav/bin/migrateto20.php b/vendor/sabre/dav/bin/migrateto20.php
index 77236804f..c7a8d9e35 100644
--- a/vendor/sabre/dav/bin/migrateto20.php
+++ b/vendor/sabre/dav/bin/migrateto20.php
@@ -4,7 +4,6 @@
 echo "SabreDAV migrate script for version 2.0\n";
 
 if ($argc < 2) {
-
     echo <<<HELLO
 
 This script help you migrate from a pre-2.0 database to 2.0 and later
@@ -36,14 +35,13 @@ php {$argv[0]} sqlite:data/sabredav.db
 HELLO;
 
     exit();
-
 }
 
 // There's a bunch of places where the autoloader could be, so we'll try all of
 // them.
 $paths = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
 ];
 
 foreach ($paths as $path) {
@@ -57,7 +55,7 @@ $dsn = $argv[1];
 $user = isset($argv[2]) ? $argv[2] : null;
 $pass = isset($argv[3]) ? $argv[3] : null;
 
-echo "Connecting to database: " . $dsn . "\n";
+echo 'Connecting to database: '.$dsn."\n";
 
 $pdo = new PDO($dsn, $user, $pass);
 $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
@@ -66,23 +64,21 @@ $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
 $driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
 
 switch ($driver) {
-
-    case 'mysql' :
+    case 'mysql':
         echo "Detected MySQL.\n";
         break;
-    case 'sqlite' :
+    case 'sqlite':
         echo "Detected SQLite.\n";
         break;
-    default :
-        echo "Error: unsupported driver: " . $driver . "\n";
+    default:
+        echo 'Error: unsupported driver: '.$driver."\n";
         die(-1);
 }
 
 foreach (['calendar', 'addressbook'] as $itemType) {
-
-    $tableName = $itemType . 's';
-    $tableNameOld = $tableName . '_old';
-    $changesTable = $itemType . 'changes';
+    $tableName = $itemType.'s';
+    $tableNameOld = $tableName.'_old';
+    $changesTable = $itemType.'changes';
 
     echo "Upgrading '$tableName'\n";
 
@@ -90,18 +86,16 @@ foreach (['calendar', 'addressbook'] as $itemType) {
     $row = $pdo->query("SELECT * FROM $tableName LIMIT 1")->fetch();
 
     if (!$row) {
-
         echo "No records were found in the '$tableName' table.\n";
         echo "\n";
         echo "We're going to rename the old table to $tableNameOld (just in case).\n";
         echo "and re-create the new table.\n";
 
         switch ($driver) {
-
-            case 'mysql' :
+            case 'mysql':
                 $pdo->exec("RENAME TABLE $tableName TO $tableNameOld");
                 switch ($itemType) {
-                    case 'calendar' :
+                    case 'calendar':
                         $pdo->exec("
             CREATE TABLE calendars (
                 id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -119,7 +113,7 @@ foreach (['calendar', 'addressbook'] as $itemType) {
             ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
                         ");
                         break;
-                    case 'addressbook' :
+                    case 'addressbook':
                         $pdo->exec("
             CREATE TABLE addressbooks (
                 id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -135,13 +129,13 @@ foreach (['calendar', 'addressbook'] as $itemType) {
                 }
                 break;
 
-            case 'sqlite' :
+            case 'sqlite':
 
                 $pdo->exec("ALTER TABLE $tableName RENAME TO $tableNameOld");
 
                 switch ($itemType) {
-                    case 'calendar' :
-                        $pdo->exec("
+                    case 'calendar':
+                        $pdo->exec('
             CREATE TABLE calendars (
                 id integer primary key asc,
                 principaluri text,
@@ -155,10 +149,10 @@ foreach (['calendar', 'addressbook'] as $itemType) {
                 components text,
                 transparent bool
             );
-                        ");
+                        ');
                         break;
-                    case 'addressbook' :
-                        $pdo->exec("
+                    case 'addressbook':
+                        $pdo->exec('
             CREATE TABLE addressbooks (
                 id integer primary key asc,
                 principaluri text,
@@ -167,45 +161,37 @@ foreach (['calendar', 'addressbook'] as $itemType) {
                 description text,
                 synctoken integer
             );
-                        ");
+                        ');
 
                         break;
                 }
                 break;
-
         }
         echo "Creation of 2.0 $tableName table is complete\n";
-
     } else {
-
         // Checking if there's a synctoken field already.
         if (array_key_exists('synctoken', $row)) {
             echo "The 'synctoken' field already exists in the $tableName table.\n";
             echo "It's likely you already upgraded, so we're simply leaving\n";
             echo "the $tableName table alone\n";
         } else {
-
             echo "1.8 table schema detected\n";
             switch ($driver) {
-
-                case 'mysql' :
+                case 'mysql':
                     $pdo->exec("ALTER TABLE $tableName ADD synctoken INT(11) UNSIGNED NOT NULL DEFAULT '1'");
                     $pdo->exec("ALTER TABLE $tableName DROP ctag");
                     $pdo->exec("UPDATE $tableName SET synctoken = '1'");
                     break;
-                case 'sqlite' :
+                case 'sqlite':
                     $pdo->exec("ALTER TABLE $tableName ADD synctoken integer");
                     $pdo->exec("UPDATE $tableName SET synctoken = '1'");
                     echo "Note: there's no easy way to remove fields in sqlite.\n";
                     echo "The ctag field is no longer used, but it's kept in place\n";
                     break;
-
             }
 
             echo "Upgraded '$tableName' to 2.0 schema.\n";
-
         }
-
     }
 
     try {
@@ -213,13 +199,11 @@ foreach (['calendar', 'addressbook'] as $itemType) {
 
         echo "'$changesTable' already exists. Assuming that this part of the\n";
         echo "upgrade was already completed.\n";
-
     } catch (Exception $e) {
         echo "Creating '$changesTable' table.\n";
 
         switch ($driver) {
-
-            case 'mysql' :
+            case 'mysql':
                 $pdo->exec("
     CREATE TABLE $changesTable (
         id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -232,7 +216,7 @@ foreach (['calendar', 'addressbook'] as $itemType) {
 
                 ");
                 break;
-            case 'sqlite' :
+            case 'sqlite':
                 $pdo->exec("
 
     CREATE TABLE $changesTable (
@@ -246,25 +230,20 @@ foreach (['calendar', 'addressbook'] as $itemType) {
                 ");
                 $pdo->exec("CREATE INDEX {$itemType}id_synctoken ON $changesTable ({$itemType}id, synctoken);");
                 break;
-
         }
-
     }
-
 }
 
 try {
-    $pdo->query("SELECT * FROM calendarsubscriptions LIMIT 1");
+    $pdo->query('SELECT * FROM calendarsubscriptions LIMIT 1');
 
     echo "'calendarsubscriptions' already exists. Assuming that this part of the\n";
     echo "upgrade was already completed.\n";
-
 } catch (Exception $e) {
     echo "Creating calendarsubscriptions table.\n";
 
     switch ($driver) {
-
-        case 'mysql' :
+        case 'mysql':
             $pdo->exec("
 CREATE TABLE calendarsubscriptions (
     id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -283,8 +262,8 @@ CREATE TABLE calendarsubscriptions (
 );
             ");
             break;
-        case 'sqlite' :
-            $pdo->exec("
+        case 'sqlite':
+            $pdo->exec('
 
 CREATE TABLE calendarsubscriptions (
     id integer primary key asc,
@@ -300,64 +279,57 @@ CREATE TABLE calendarsubscriptions (
     stripattachments bool,
     lastmodified int
 );
-            ");
+            ');
 
-            $pdo->exec("CREATE INDEX principaluri_uri ON calendarsubscriptions (principaluri, uri);");
+            $pdo->exec('CREATE INDEX principaluri_uri ON calendarsubscriptions (principaluri, uri);');
             break;
-
     }
-
 }
 
 try {
-    $pdo->query("SELECT * FROM propertystorage LIMIT 1");
+    $pdo->query('SELECT * FROM propertystorage LIMIT 1');
 
     echo "'propertystorage' already exists. Assuming that this part of the\n";
     echo "upgrade was already completed.\n";
-
 } catch (Exception $e) {
     echo "Creating propertystorage table.\n";
 
     switch ($driver) {
-
-        case 'mysql' :
-            $pdo->exec("
+        case 'mysql':
+            $pdo->exec('
 CREATE TABLE propertystorage (
     id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
     path VARBINARY(1024) NOT NULL,
     name VARBINARY(100) NOT NULL,
     value MEDIUMBLOB
 );
-            ");
-            $pdo->exec("
+            ');
+            $pdo->exec('
 CREATE UNIQUE INDEX path_property ON propertystorage (path(600), name(100));
-            ");
+            ');
             break;
-        case 'sqlite' :
-            $pdo->exec("
+        case 'sqlite':
+            $pdo->exec('
 CREATE TABLE propertystorage (
     id integer primary key asc,
     path TEXT,
     name TEXT,
     value TEXT
 );
-            ");
-            $pdo->exec("
+            ');
+            $pdo->exec('
 CREATE UNIQUE INDEX path_property ON propertystorage (path, name);
-            ");
+            ');
 
             break;
-
     }
-
 }
 
 echo "Upgrading cards table to 2.0 schema\n";
 
 try {
-
     $create = false;
-    $row = $pdo->query("SELECT * FROM cards LIMIT 1")->fetch();
+    $row = $pdo->query('SELECT * FROM cards LIMIT 1')->fetch();
     if (!$row) {
         $random = mt_rand(1000, 9999);
         echo "There was no data in the cards table, so we're re-creating it\n";
@@ -366,28 +338,24 @@ try {
         $create = true;
 
         switch ($driver) {
-            case 'mysql' :
+            case 'mysql':
                 $pdo->exec("RENAME TABLE cards TO cards_old$random");
                 break;
-            case 'sqlite' :
+            case 'sqlite':
                 $pdo->exec("ALTER TABLE cards RENAME TO cards_old$random");
                 break;
-
         }
     }
-
 } catch (Exception $e) {
-
     echo "Exception while checking cards table. Assuming that the table does not yet exist.\n";
-    echo "Debug: ", $e->getMessage(), "\n";
+    echo 'Debug: ', $e->getMessage(), "\n";
     $create = true;
-
 }
 
 if ($create) {
     switch ($driver) {
-        case 'mysql' :
-            $pdo->exec("
+        case 'mysql':
+            $pdo->exec('
 CREATE TABLE cards (
     id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
     addressbookid INT(11) UNSIGNED NOT NULL,
@@ -398,12 +366,12 @@ CREATE TABLE cards (
     size INT(11) UNSIGNED NOT NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
 
-            ");
+            ');
             break;
 
-        case 'sqlite' :
+        case 'sqlite':
 
-            $pdo->exec("
+            $pdo->exec('
 CREATE TABLE cards (
     id integer primary key asc,
     addressbookid integer,
@@ -413,28 +381,26 @@ CREATE TABLE cards (
     etag text,
     size integer
 );
-            ");
+            ');
             break;
-
     }
 } else {
     switch ($driver) {
-        case 'mysql' :
-            $pdo->exec("
+        case 'mysql':
+            $pdo->exec('
                 ALTER TABLE cards
                 ADD etag VARBINARY(32),
                 ADD size INT(11) UNSIGNED NOT NULL;
-            ");
+            ');
             break;
 
-        case 'sqlite' :
+        case 'sqlite':
 
-            $pdo->exec("
+            $pdo->exec('
                 ALTER TABLE cards ADD etag text;
                 ALTER TABLE cards ADD size integer;
-            ");
+            ');
             break;
-
     }
     echo "Reading all old vcards and populating etag and size fields.\n";
     $result = $pdo->query('SELECT id, carddata FROM cards');
@@ -443,11 +409,9 @@ CREATE TABLE cards (
         $stmt->execute([
             md5($row['carddata']),
             strlen($row['carddata']),
-            $row['id']
+            $row['id'],
         ]);
     }
-
-
 }
 
 echo "Upgrade to 2.0 schema completed.\n";
diff --git a/vendor/sabre/dav/bin/migrateto21.php b/vendor/sabre/dav/bin/migrateto21.php
index c81ee5cca..909643583 100644
--- a/vendor/sabre/dav/bin/migrateto21.php
+++ b/vendor/sabre/dav/bin/migrateto21.php
@@ -4,7 +4,6 @@
 echo "SabreDAV migrate script for version 2.1\n";
 
 if ($argc < 2) {
-
     echo <<<HELLO
 
 This script help you migrate from a pre-2.1 database to 2.1.
@@ -37,14 +36,13 @@ php {$argv[0]} sqlite:data/sabredav.db
 HELLO;
 
     exit();
-
 }
 
 // There's a bunch of places where the autoloader could be, so we'll try all of
 // them.
 $paths = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
 ];
 
 foreach ($paths as $path) {
@@ -58,7 +56,7 @@ $dsn = $argv[1];
 $user = isset($argv[2]) ? $argv[2] : null;
 $pass = isset($argv[3]) ? $argv[3] : null;
 
-echo "Connecting to database: " . $dsn . "\n";
+echo 'Connecting to database: '.$dsn."\n";
 
 $pdo = new PDO($dsn, $user, $pass);
 $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
@@ -67,15 +65,14 @@ $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
 $driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
 
 switch ($driver) {
-
-    case 'mysql' :
+    case 'mysql':
         echo "Detected MySQL.\n";
         break;
-    case 'sqlite' :
+    case 'sqlite':
         echo "Detected SQLite.\n";
         break;
-    default :
-        echo "Error: unsupported driver: " . $driver . "\n";
+    default:
+        echo 'Error: unsupported driver: '.$driver."\n";
         die(-1);
 }
 
@@ -95,19 +92,17 @@ try {
         echo "2.0 schema detected.\n";
         $addUid = true;
     }
-
 } catch (Exception $e) {
     echo "Could not find a calendarobjects table. Skipping this part of the\n";
     echo "upgrade.\n";
 }
 
 if ($addUid) {
-
     switch ($driver) {
-        case 'mysql' :
+        case 'mysql':
             $pdo->exec('ALTER TABLE calendarobjects ADD uid VARCHAR(200)');
             break;
-        case 'sqlite' :
+        case 'sqlite':
             $pdo->exec('ALTER TABLE calendarobjects ADD uid TEXT');
             break;
     }
@@ -117,7 +112,6 @@ if ($addUid) {
     $counter = 0;
 
     while ($row = $result->fetch(\PDO::FETCH_ASSOC)) {
-
         try {
             $vobj = \Sabre\VObject\Reader::read($row['calendardata']);
         } catch (\Exception $e) {
@@ -130,19 +124,16 @@ if ($addUid) {
             echo "Warning! Item with id $item[id] does NOT have a UID property and this is required.\n";
             continue;
         }
-        $uid = (string)$item->UID;
+        $uid = (string) $item->UID;
         $stmt->execute([$uid, $row['id']]);
-        $counter++;
-
+        ++$counter;
     }
-
 }
 
 echo "Creating 'schedulingobjects'\n";
 
 switch ($driver) {
-
-    case 'mysql' :
+    case 'mysql':
         $pdo->exec('CREATE TABLE IF NOT EXISTS schedulingobjects
 (
     id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -156,8 +147,7 @@ switch ($driver) {
         ');
         break;
 
-
-    case 'sqlite' :
+    case 'sqlite':
         $pdo->exec('CREATE TABLE IF NOT EXISTS schedulingobjects (
     id integer primary key asc,
     principaluri text,
diff --git a/vendor/sabre/dav/bin/migrateto30.php b/vendor/sabre/dav/bin/migrateto30.php
index 9ca77c13c..25e544c2a 100644
--- a/vendor/sabre/dav/bin/migrateto30.php
+++ b/vendor/sabre/dav/bin/migrateto30.php
@@ -4,7 +4,6 @@
 echo "SabreDAV migrate script for version 3.0\n";
 
 if ($argc < 2) {
-
     echo <<<HELLO
 
 This script help you migrate from a pre-3.0 database to 3.0 and later
@@ -36,14 +35,13 @@ php {$argv[0]} sqlite:data/sabredav.db
 HELLO;
 
     exit();
-
 }
 
 // There's a bunch of places where the autoloader could be, so we'll try all of
 // them.
 $paths = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
 ];
 
 foreach ($paths as $path) {
@@ -57,7 +55,7 @@ $dsn = $argv[1];
 $user = isset($argv[2]) ? $argv[2] : null;
 $pass = isset($argv[3]) ? $argv[3] : null;
 
-echo "Connecting to database: " . $dsn . "\n";
+echo 'Connecting to database: '.$dsn."\n";
 
 $pdo = new PDO($dsn, $user, $pass);
 $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
@@ -66,15 +64,14 @@ $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
 $driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
 
 switch ($driver) {
-
-    case 'mysql' :
+    case 'mysql':
         echo "Detected MySQL.\n";
         break;
-    case 'sqlite' :
+    case 'sqlite':
         echo "Detected SQLite.\n";
         break;
-    default :
-        echo "Error: unsupported driver: " . $driver . "\n";
+    default:
+        echo 'Error: unsupported driver: '.$driver."\n";
         die(-1);
 }
 
@@ -90,9 +87,8 @@ try {
         echo "Renaming propertystorage -> propertystorage_old$random and creating new table.\n";
 
         switch ($driver) {
-
-            case 'mysql' :
-                $pdo->exec('RENAME TABLE propertystorage TO propertystorage_old' . $random);
+            case 'mysql':
+                $pdo->exec('RENAME TABLE propertystorage TO propertystorage_old'.$random);
                 $pdo->exec('
     CREATE TABLE propertystorage (
         id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -102,10 +98,10 @@ try {
         value MEDIUMBLOB
     );
                 ');
-                $pdo->exec('CREATE UNIQUE INDEX path_property_' . $random . '  ON propertystorage (path(600), name(100));');
+                $pdo->exec('CREATE UNIQUE INDEX path_property_'.$random.'  ON propertystorage (path(600), name(100));');
                 break;
-            case 'sqlite' :
-                $pdo->exec('ALTER TABLE propertystorage RENAME TO propertystorage_old' . $random);
+            case 'sqlite':
+                $pdo->exec('ALTER TABLE propertystorage RENAME TO propertystorage_old'.$random);
                 $pdo->exec('
 CREATE TABLE propertystorage (
     id integer primary key asc,
@@ -115,9 +111,8 @@ CREATE TABLE propertystorage (
     value blob
 );');
 
-                $pdo->exec('CREATE UNIQUE INDEX path_property_' . $random . ' ON propertystorage (path, name);');
+                $pdo->exec('CREATE UNIQUE INDEX path_property_'.$random.' ON propertystorage (path, name);');
                 break;
-
         }
     } elseif (array_key_exists('valuetype', $row)) {
         echo "valuetype field exists. Assuming that this part of the migration has\n";
@@ -126,7 +121,6 @@ CREATE TABLE propertystorage (
         echo "2.1 schema detected. Going to perform upgrade.\n";
         $addValueType = true;
     }
-
 } catch (Exception $e) {
     echo "Could not find a propertystorage table. Skipping this part of the\n";
     echo "upgrade.\n";
@@ -134,19 +128,17 @@ CREATE TABLE propertystorage (
 }
 
 if ($addValueType) {
-
     switch ($driver) {
-        case 'mysql' :
+        case 'mysql':
             $pdo->exec('ALTER TABLE propertystorage ADD valuetype INT UNSIGNED');
             break;
-        case 'sqlite' :
+        case 'sqlite':
             $pdo->exec('ALTER TABLE propertystorage ADD valuetype INT');
 
             break;
     }
 
     $pdo->exec('UPDATE propertystorage SET valuetype = 1 WHERE valuetype IS NULL ');
-
 }
 
 echo "Migrating vcardurl\n";
@@ -155,16 +147,14 @@ $result = $pdo->query('SELECT id, uri, vcardurl FROM principals WHERE vcardurl I
 $stmt1 = $pdo->prepare('INSERT INTO propertystorage (path, name, valuetype, value) VALUES (?, ?, 3, ?)');
 
 while ($row = $result->fetch(\PDO::FETCH_ASSOC)) {
-
     // Inserting the new record
     $stmt1->execute([
-        'addressbooks/' . basename($row['uri']),
+        'addressbooks/'.basename($row['uri']),
         '{http://calendarserver.org/ns/}me-card',
-        serialize(new Sabre\DAV\Xml\Property\Href($row['vcardurl']))
+        serialize(new Sabre\DAV\Xml\Property\Href($row['vcardurl'])),
     ]);
 
     echo serialize(new Sabre\DAV\Xml\Property\Href($row['vcardurl']));
-
 }
 
 echo "Done.\n";
diff --git a/vendor/sabre/dav/bin/migrateto32.php b/vendor/sabre/dav/bin/migrateto32.php
index 7567aeb60..57fd35507 100644
--- a/vendor/sabre/dav/bin/migrateto32.php
+++ b/vendor/sabre/dav/bin/migrateto32.php
@@ -4,7 +4,6 @@
 echo "SabreDAV migrate script for version 3.2\n";
 
 if ($argc < 2) {
-
     echo <<<HELLO
 
 This script help you migrate from a 3.1 database to 3.2 and later
@@ -37,14 +36,13 @@ php {$argv[0]} sqlite:data/sabredav.db
 HELLO;
 
     exit();
-
 }
 
 // There's a bunch of places where the autoloader could be, so we'll try all of
 // them.
 $paths = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
 ];
 
 foreach ($paths as $path) {
@@ -60,7 +58,7 @@ $pass = isset($argv[3]) ? $argv[3] : null;
 
 $backupPostfix = time();
 
-echo "Connecting to database: " . $dsn . "\n";
+echo 'Connecting to database: '.$dsn."\n";
 
 $pdo = new PDO($dsn, $user, $pass);
 $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
@@ -69,15 +67,14 @@ $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
 $driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
 
 switch ($driver) {
-
-    case 'mysql' :
+    case 'mysql':
         echo "Detected MySQL.\n";
         break;
-    case 'sqlite' :
+    case 'sqlite':
         echo "Detected SQLite.\n";
         break;
-    default :
-        echo "Error: unsupported driver: " . $driver . "\n";
+    default:
+        echo 'Error: unsupported driver: '.$driver."\n";
         die(-1);
 }
 
@@ -91,7 +88,7 @@ try {
     echo "calendarinstances does not yet exist. Creating table and migrating data.\n";
 
     switch ($driver) {
-        case 'mysql' :
+        case 'mysql':
             $pdo->exec(<<<SQL
 CREATE TABLE calendarinstances (
     id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -114,7 +111,7 @@ CREATE TABLE calendarinstances (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 SQL
         );
-            $pdo->exec("
+            $pdo->exec('
 INSERT INTO calendarinstances
     (
         calendarid,
@@ -138,9 +135,9 @@ SELECT
     calendarcolor,
     transparent
 FROM calendars
-");
+');
             break;
-        case 'sqlite' :
+        case 'sqlite':
             $pdo->exec(<<<SQL
 CREATE TABLE calendarinstances (
     id integer primary key asc NOT NULL,
@@ -163,7 +160,7 @@ CREATE TABLE calendarinstances (
 );
 SQL
         );
-            $pdo->exec("
+            $pdo->exec('
 INSERT INTO calendarinstances
     (
         calendarid,
@@ -187,10 +184,9 @@ SELECT
     calendarcolor,
     transparent
 FROM calendars
-");
+');
             break;
     }
-
 }
 try {
     $result = $pdo->query('SELECT * FROM calendars LIMIT 1');
@@ -202,37 +198,34 @@ try {
     }
 
     $columnCount = count($row);
-    if ($columnCount === 3) {
+    if (3 === $columnCount) {
         echo "The calendars table has 3 columns already. Assuming this part of the migration was already done.\n";
         $migrateCalendars = false;
     } else {
-        echo "The calendars table has " . $columnCount . " columns.\n";
+        echo 'The calendars table has '.$columnCount." columns.\n";
         $migrateCalendars = true;
     }
-
 } catch (Exception $e) {
     echo "calendars table does not exist. This is a major problem. Exiting.\n";
     exit(-1);
 }
 
 if ($migrateCalendars) {
-
-    $calendarBackup = 'calendars_3_1_' . $backupPostfix;
+    $calendarBackup = 'calendars_3_1_'.$backupPostfix;
     echo "Backing up 'calendars' to '", $calendarBackup, "'\n";
 
     switch ($driver) {
-        case 'mysql' :
-            $pdo->exec('RENAME TABLE calendars TO ' . $calendarBackup);
+        case 'mysql':
+            $pdo->exec('RENAME TABLE calendars TO '.$calendarBackup);
             break;
-        case 'sqlite' :
-            $pdo->exec('ALTER TABLE calendars RENAME TO ' . $calendarBackup);
+        case 'sqlite':
+            $pdo->exec('ALTER TABLE calendars RENAME TO '.$calendarBackup);
             break;
-
     }
 
     echo "Creating new calendars table.\n";
     switch ($driver) {
-        case 'mysql' :
+        case 'mysql':
             $pdo->exec(<<<SQL
 CREATE TABLE calendars (
     id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
@@ -242,7 +235,7 @@ CREATE TABLE calendars (
 SQL
 );
             break;
-        case 'sqlite' :
+        case 'sqlite':
             $pdo->exec(<<<SQL
 CREATE TABLE calendars (
     id integer primary key asc NOT NULL,
@@ -252,7 +245,6 @@ CREATE TABLE calendars (
 SQL
         );
             break;
-
     }
 
     echo "Migrating data from old to new table\n";
@@ -261,8 +253,6 @@ SQL
 INSERT INTO calendars (id, synctoken, components) SELECT id, synctoken, COALESCE(components,"VEVENT,VTODO,VJOURNAL") as components FROM $calendarBackup
 SQL
     );
-
 }
 
-
 echo "Upgrade to 3.2 schema completed.\n";
diff --git a/vendor/sabre/dav/bin/sabredav.php b/vendor/sabre/dav/bin/sabredav.php
index 950075d1a..28341b587 100644
--- a/vendor/sabre/dav/bin/sabredav.php
+++ b/vendor/sabre/dav/bin/sabredav.php
@@ -2,34 +2,32 @@
 
 // SabreDAV test server.
 
-class CliLog {
-
+class CliLog
+{
     protected $stream;
 
-    function __construct() {
-
+    public function __construct()
+    {
         $this->stream = fopen('php://stdout', 'w');
-
     }
 
-    function log($msg) {
-        fwrite($this->stream, $msg . "\n");
+    public function log($msg)
+    {
+        fwrite($this->stream, $msg."\n");
     }
-
 }
 
 $log = new CliLog();
 
-if (php_sapi_name() !== 'cli-server') {
-    die("This script is intended to run on the built-in php webserver");
+if ('cli-server' !== php_sapi_name()) {
+    die('This script is intended to run on the built-in php webserver');
 }
 
 // Finding composer
 
-
 $paths = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
 ];
 
 foreach ($paths as $path) {
@@ -41,7 +39,7 @@ foreach ($paths as $path) {
 
 use Sabre\DAV;
 
-// Root 
+// Root
 $root = new DAV\FS\Directory(getcwd());
 
 // Setting up server.
diff --git a/vendor/sabre/dav/composer.json b/vendor/sabre/dav/composer.json
index fca0e07fb..226b2cb30 100644
--- a/vendor/sabre/dav/composer.json
+++ b/vendor/sabre/dav/composer.json
@@ -14,12 +14,12 @@
         }
     ],
     "require": {
-        "php": ">=5.5.0",
-        "sabre/vobject": "^4.1.0",
-        "sabre/event" : ">=2.0.0, <4.0.0",
-        "sabre/xml"  : "^1.4.0",
-        "sabre/http" : "^4.2.1",
-        "sabre/uri" : "^1.0.1",
+        "php": ">=7.0.0",
+        "sabre/vobject": "^4.2.0-alpha1",
+        "sabre/event" : "^5.0",
+        "sabre/xml"  : "^2.0.1",
+        "sabre/http" : "^5.0",
+        "sabre/uri" : "^2.0",
         "ext-dom": "*",
         "ext-pcre": "*",
         "ext-spl": "*",
@@ -29,17 +29,18 @@
         "ext-date" : "*",
         "ext-iconv" : "*",
         "lib-libxml" : ">=2.7.0",
-        "psr/log": "^1.0"
+        "psr/log": "^1.0",
+        "ext-json": "*"
     },
     "require-dev" : {
-        "phpunit/phpunit" : "> 4.8, <6.0.0",
+        "phpunit/phpunit" : "^6",
         "evert/phpdoc-md" : "~0.1.0",
-        "sabre/cs"        : "^1.0.0",
         "monolog/monolog": "^1.18"
     },
     "suggest" : {
         "ext-curl" : "*",
-        "ext-pdo" : "*"
+        "ext-pdo" : "*",
+        "ext-imap": "*"
     },
     "autoload": {
         "psr-4" : {
@@ -59,10 +60,5 @@
     ],
     "config" : {
         "bin-dir" : "./bin"
-    },
-    "extra" : {
-        "branch-alias": {
-            "dev-master": "3.1.0-dev"
-        }
     }
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/AbstractBackend.php b/vendor/sabre/dav/lib/CalDAV/Backend/AbstractBackend.php
index 311b1c415..336e104c8 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/AbstractBackend.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/AbstractBackend.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use Sabre\CalDAV;
@@ -14,8 +16,8 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractBackend implements BackendInterface {
-
+abstract class AbstractBackend implements BackendInterface
+{
     /**
      * Updates properties for a calendar.
      *
@@ -28,12 +30,11 @@ abstract class AbstractBackend implements BackendInterface {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param mixed $calendarId
+     * @param mixed                $calendarId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch) {
-
+    public function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch)
+    {
     }
 
     /**
@@ -46,14 +47,14 @@ abstract class AbstractBackend implements BackendInterface {
      *
      * @param mixed $calendarId
      * @param array $uris
+     *
      * @return array
      */
-    function getMultipleCalendarObjects($calendarId, array $uris) {
-
-        return array_map(function($uri) use ($calendarId) {
+    public function getMultipleCalendarObjects($calendarId, array $uris)
+    {
+        return array_map(function ($uri) use ($calendarId) {
             return $this->getCalendarObject($calendarId, $uri);
         }, $uris);
-
     }
 
     /**
@@ -103,23 +104,21 @@ abstract class AbstractBackend implements BackendInterface {
      *
      * @param mixed $calendarId
      * @param array $filters
+     *
      * @return array
      */
-    function calendarQuery($calendarId, array $filters) {
-
+    public function calendarQuery($calendarId, array $filters)
+    {
         $result = [];
         $objects = $this->getCalendarObjects($calendarId);
 
         foreach ($objects as $object) {
-
             if ($this->validateFilterForObject($object, $filters)) {
                 $result[] = $object['uri'];
             }
-
         }
 
         return $result;
-
     }
 
     /**
@@ -128,10 +127,11 @@ abstract class AbstractBackend implements BackendInterface {
      *
      * @param array $object
      * @param array $filters
+     *
      * @return bool
      */
-    protected function validateFilterForObject(array $object, array $filters) {
-
+    protected function validateFilterForObject(array $object, array $filters)
+    {
         // Unfortunately, setting the 'calendardata' here is optional. If
         // it was excluded, we actually need another call to get this as
         // well.
@@ -148,7 +148,6 @@ abstract class AbstractBackend implements BackendInterface {
         $vObject->destroy();
 
         return $result;
-
     }
 
     /**
@@ -168,14 +167,14 @@ abstract class AbstractBackend implements BackendInterface {
      *
      * @param string $principalUri
      * @param string $uid
+     *
      * @return string|null
      */
-    function getCalendarObjectByUID($principalUri, $uid) {
-
+    public function getCalendarObjectByUID($principalUri, $uid)
+    {
         // Note: this is a super slow naive implementation of this method. You
         // are highly recommended to optimize it, if your backend allows it.
         foreach ($this->getCalendarsForUser($principalUri) as $calendar) {
-
             // We must ignore calendars owned by other principals.
             if ($calendar['principaluri'] !== $principalUri) {
                 continue;
@@ -189,38 +188,35 @@ abstract class AbstractBackend implements BackendInterface {
             $results = $this->calendarQuery(
                 $calendar['id'],
                 [
-                    'name'         => 'VCALENDAR',
+                    'name' => 'VCALENDAR',
                     'prop-filters' => [],
                     'comp-filters' => [
                         [
-                            'name'           => 'VEVENT',
+                            'name' => 'VEVENT',
                             'is-not-defined' => false,
-                            'time-range'     => null,
-                            'comp-filters'   => [],
-                            'prop-filters'   => [
+                            'time-range' => null,
+                            'comp-filters' => [],
+                            'prop-filters' => [
                                 [
-                                    'name'           => 'UID',
+                                    'name' => 'UID',
                                     'is-not-defined' => false,
-                                    'time-range'     => null,
-                                    'text-match'     => [
-                                        'value'            => $uid,
+                                    'time-range' => null,
+                                    'text-match' => [
+                                        'value' => $uid,
                                         'negate-condition' => false,
-                                        'collation'        => 'i;octet',
+                                        'collation' => 'i;octet',
                                     ],
                                     'param-filters' => [],
                                 ],
-                            ]
-                        ]
+                            ],
+                        ],
                     ],
                 ]
             );
             if ($results) {
                 // We have a match
-                return $calendar['uri'] . '/' . $results[0];
+                return $calendar['uri'].'/'.$results[0];
             }
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php b/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php
index bd8ee7602..7d125cf89 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 /**
@@ -9,8 +11,8 @@ namespace Sabre\CalDAV\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface BackendInterface {
-
+interface BackendInterface
+{
     /**
      * Returns a list of calendars for a principal.
      *
@@ -34,9 +36,10 @@ interface BackendInterface {
      * ACL will automatically be put in read-only mode.
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getCalendarsForUser($principalUri);
+    public function getCalendarsForUser($principalUri);
 
     /**
      * Creates a new calendar for a principal.
@@ -48,10 +51,11 @@ interface BackendInterface {
      *
      * @param string $principalUri
      * @param string $calendarUri
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return mixed
      */
-    function createCalendar($principalUri, $calendarUri, array $properties);
+    public function createCalendar($principalUri, $calendarUri, array $properties);
 
     /**
      * Updates properties for a calendar.
@@ -65,19 +69,17 @@ interface BackendInterface {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param mixed $calendarId
+     * @param mixed                $calendarId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch);
+    public function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch);
 
     /**
-     * Delete a calendar and all its objects
+     * Delete a calendar and all its objects.
      *
      * @param mixed $calendarId
-     * @return void
      */
-    function deleteCalendar($calendarId);
+    public function deleteCalendar($calendarId);
 
     /**
      * Returns all calendar objects within a calendar.
@@ -108,9 +110,10 @@ interface BackendInterface {
      * amount of times this is needed is reduced by a great degree.
      *
      * @param mixed $calendarId
+     *
      * @return array
      */
-    function getCalendarObjects($calendarId);
+    public function getCalendarObjects($calendarId);
 
     /**
      * Returns information from a single calendar object, based on it's object
@@ -124,11 +127,12 @@ interface BackendInterface {
      *
      * This method must return null if the object did not exist.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
+     *
      * @return array|null
      */
-    function getCalendarObject($calendarId, $objectUri);
+    public function getCalendarObject($calendarId, $objectUri);
 
     /**
      * Returns a list of calendar objects.
@@ -140,9 +144,10 @@ interface BackendInterface {
      *
      * @param mixed $calendarId
      * @param array $uris
+     *
      * @return array
      */
-    function getMultipleCalendarObjects($calendarId, array $uris);
+    public function getMultipleCalendarObjects($calendarId, array $uris);
 
     /**
      * Creates a new calendar object.
@@ -157,12 +162,13 @@ interface BackendInterface {
      * calendar-data. If the result of a subsequent GET to this object is not
      * the exact same as this request body, you should omit the ETag.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
      * @param string $calendarData
+     *
      * @return string|null
      */
-    function createCalendarObject($calendarId, $objectUri, $calendarData);
+    public function createCalendarObject($calendarId, $objectUri, $calendarData);
 
     /**
      * Updates an existing calendarobject, based on it's uri.
@@ -177,23 +183,23 @@ interface BackendInterface {
      * calendar-data. If the result of a subsequent GET to this object is not
      * the exact same as this request body, you should omit the ETag.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
      * @param string $calendarData
+     *
      * @return string|null
      */
-    function updateCalendarObject($calendarId, $objectUri, $calendarData);
+    public function updateCalendarObject($calendarId, $objectUri, $calendarData);
 
     /**
      * Deletes an existing calendar object.
      *
      * The object uri is only the basename, or filename and not a full path.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
-     * @return void
      */
-    function deleteCalendarObject($calendarId, $objectUri);
+    public function deleteCalendarObject($calendarId, $objectUri);
 
     /**
      * Performs a calendar-query on the contents of this calendar.
@@ -242,9 +248,10 @@ interface BackendInterface {
      *
      * @param mixed $calendarId
      * @param array $filters
+     *
      * @return array
      */
-    function calendarQuery($calendarId, array $filters);
+    public function calendarQuery($calendarId, array $filters);
 
     /**
      * Searches through all of a users calendars and calendar objects to find
@@ -263,8 +270,8 @@ interface BackendInterface {
      *
      * @param string $principalUri
      * @param string $uid
+     *
      * @return string|null
      */
-    function getCalendarObjectByUID($principalUri, $uid);
-
+    public function getCalendarObjectByUID($principalUri, $uid);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php b/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php
index bf2ef27a0..0ba493305 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use Sabre\CalDAV\Xml\Notification\NotificationInterface;
@@ -22,26 +24,26 @@ use Sabre\CalDAV\Xml\Notification\NotificationInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface NotificationSupport extends BackendInterface {
-
+interface NotificationSupport extends BackendInterface
+{
     /**
      * Returns a list of notifications for a given principal url.
      *
      * @param string $principalUri
+     *
      * @return NotificationInterface[]
      */
-    function getNotificationsForPrincipal($principalUri);
+    public function getNotificationsForPrincipal($principalUri);
 
     /**
      * This deletes a specific notifcation.
      *
      * This may be called by a client once it deems a notification handled.
      *
-     * @param string $principalUri
+     * @param string                $principalUri
      * @param NotificationInterface $notification
-     * @return void
      */
-    function deleteNotification($principalUri, NotificationInterface $notification);
+    public function deleteNotification($principalUri, NotificationInterface $notification);
 
     /**
      * This method is called when a user replied to a request to share.
@@ -49,13 +51,13 @@ interface NotificationSupport extends BackendInterface {
      * If the user chose to accept the share, this method should return the
      * newly created calendar url.
      *
-     * @param string $href The sharee who is replying (often a mailto: address)
-     * @param int $status One of the SharingPlugin::STATUS_* constants
+     * @param string $href        The sharee who is replying (often a mailto: address)
+     * @param int    $status      One of the SharingPlugin::STATUS_* constants
      * @param string $calendarUri The url to the calendar thats being shared
-     * @param string $inReplyTo The unique id this message is a response to
-     * @param string $summary A description of the reply
-     * @return null|string
+     * @param string $inReplyTo   The unique id this message is a response to
+     * @param string $summary     A description of the reply
+     *
+     * @return string|null
      */
-    function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null);
-
+    public function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php b/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php
index 458440588..003dc1392 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use Sabre\CalDAV;
@@ -9,7 +11,7 @@ use Sabre\DAV\Xml\Element\Sharee;
 use Sabre\VObject;
 
 /**
- * PDO CalDAV backend
+ * PDO CalDAV backend.
  *
  * This backend is used to store calendar-data in a PDO database, such as
  * sqlite or MySQL
@@ -18,15 +20,10 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PDO extends AbstractBackend
-    implements
-        SyncSupport,
-        SubscriptionSupport,
-        SchedulingSupport,
-        SharingSupport {
-
+class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, SchedulingSupport, SharingSupport
+{
     /**
-     * We need to specify a max date, because we need to stop *somewhere*
+     * We need to specify a max date, because we need to stop *somewhere*.
      *
      * On 32 bit system the maximum for a signed integer is 2147483647, so
      * MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
@@ -36,14 +33,14 @@ class PDO extends AbstractBackend
     const MAX_DATE = '2038-01-01';
 
     /**
-     * pdo
+     * pdo.
      *
      * @var \PDO
      */
     protected $pdo;
 
     /**
-     * The table name that will be used for calendars
+     * The table name that will be used for calendars.
      *
      * @var string
      */
@@ -60,7 +57,7 @@ class PDO extends AbstractBackend
     public $calendarInstancesTableName = 'calendarinstances';
 
     /**
-     * The table name that will be used for calendar objects
+     * The table name that will be used for calendar objects.
      *
      * @var string
      */
@@ -96,11 +93,11 @@ class PDO extends AbstractBackend
      * @var array
      */
     public $propertyMap = [
-        '{DAV:}displayname'                                   => 'displayname',
+        '{DAV:}displayname' => 'displayname',
         '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
-        '{urn:ietf:params:xml:ns:caldav}calendar-timezone'    => 'timezone',
-        '{http://apple.com/ns/ical/}calendar-order'           => 'calendarorder',
-        '{http://apple.com/ns/ical/}calendar-color'           => 'calendarcolor',
+        '{urn:ietf:params:xml:ns:caldav}calendar-timezone' => 'timezone',
+        '{http://apple.com/ns/ical/}calendar-order' => 'calendarorder',
+        '{http://apple.com/ns/ical/}calendar-color' => 'calendarcolor',
     ];
 
     /**
@@ -109,24 +106,23 @@ class PDO extends AbstractBackend
      * @var array
      */
     public $subscriptionPropertyMap = [
-        '{DAV:}displayname'                                           => 'displayname',
-        '{http://apple.com/ns/ical/}refreshrate'                      => 'refreshrate',
-        '{http://apple.com/ns/ical/}calendar-order'                   => 'calendarorder',
-        '{http://apple.com/ns/ical/}calendar-color'                   => 'calendarcolor',
-        '{http://calendarserver.org/ns/}subscribed-strip-todos'       => 'striptodos',
-        '{http://calendarserver.org/ns/}subscribed-strip-alarms'      => 'stripalarms',
+        '{DAV:}displayname' => 'displayname',
+        '{http://apple.com/ns/ical/}refreshrate' => 'refreshrate',
+        '{http://apple.com/ns/ical/}calendar-order' => 'calendarorder',
+        '{http://apple.com/ns/ical/}calendar-color' => 'calendarcolor',
+        '{http://calendarserver.org/ns/}subscribed-strip-todos' => 'striptodos',
+        '{http://calendarserver.org/ns/}subscribed-strip-alarms' => 'stripalarms',
         '{http://calendarserver.org/ns/}subscribed-strip-attachments' => 'stripattachments',
     ];
 
     /**
-     * Creates the backend
+     * Creates the backend.
      *
      * @param \PDO $pdo
      */
-    function __construct(\PDO $pdo) {
-
+    public function __construct(\PDO $pdo)
+    {
         $this->pdo = $pdo;
-
     }
 
     /**
@@ -151,10 +147,11 @@ class PDO extends AbstractBackend
      * ACL will automatically be put in read-only mode.
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getCalendarsForUser($principalUri) {
-
+    public function getCalendarsForUser($principalUri)
+    {
         $fields = array_values($this->propertyMap);
         $fields[] = 'calendarid';
         $fields[] = 'uri';
@@ -177,24 +174,23 @@ SQL
 
         $calendars = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
             $components = [];
             if ($row['components']) {
                 $components = explode(',', $row['components']);
             }
 
             $calendar = [
-                'id'                                                                 => [(int)$row['calendarid'], (int)$row['id']],
-                'uri'                                                                => $row['uri'],
-                'principaluri'                                                       => $row['principaluri'],
-                '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}getctag'                  => 'http://sabre.io/ns/sync/' . ($row['synctoken'] ? $row['synctoken'] : '0'),
-                '{http://sabredav.org/ns}sync-token'                                 => $row['synctoken'] ? $row['synctoken'] : '0',
-                '{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet($components),
-                '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp'         => new CalDAV\Xml\Property\ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
-                'share-resource-uri'                                                 => '/ns/share/' . $row['calendarid'],
+                'id' => [(int) $row['calendarid'], (int) $row['id']],
+                'uri' => $row['uri'],
+                'principaluri' => $row['principaluri'],
+                '{'.CalDAV\Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+                '{'.CalDAV\Plugin::NS_CALDAV.'}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet($components),
+                '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+                'share-resource-uri' => '/ns/share/'.$row['calendarid'],
             ];
 
-            $calendar['share-access'] = (int)$row['access'];
+            $calendar['share-access'] = (int) $row['access'];
             // 1 = owner, 2 = readonly, 3 = readwrite
             if ($row['access'] > 1) {
                 // We need to find more information about the original owner.
@@ -203,7 +199,7 @@ SQL
 
                 // read-only is for backwards compatbility. Might go away in
                 // the future.
-                $calendar['read-only'] = (int)$row['access'] === \Sabre\DAV\Sharing\Plugin::ACCESS_READ;
+                $calendar['read-only'] = \Sabre\DAV\Sharing\Plugin::ACCESS_READ === (int) $row['access'];
             }
 
             foreach ($this->propertyMap as $xmlName => $dbName) {
@@ -211,11 +207,9 @@ SQL
             }
 
             $calendars[] = $calendar;
-
         }
 
         return $calendars;
-
     }
 
     /**
@@ -226,11 +220,12 @@ SQL
      *
      * @param string $principalUri
      * @param string $calendarUri
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return string
      */
-    function createCalendar($principalUri, $calendarUri, array $properties) {
-
+    public function createCalendar($principalUri, $calendarUri, array $properties)
+    {
         $fieldNames = [
             'principaluri',
             'uri',
@@ -239,51 +234,48 @@ SQL
         ];
         $values = [
             ':principaluri' => $principalUri,
-            ':uri'          => $calendarUri,
-            ':transparent'  => 0,
+            ':uri' => $calendarUri,
+            ':transparent' => 0,
         ];
 
-
         $sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
         if (!isset($properties[$sccs])) {
             // Default value
             $components = 'VEVENT,VTODO';
         } else {
             if (!($properties[$sccs] instanceof CalDAV\Xml\Property\SupportedCalendarComponentSet)) {
-                throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet');
+                throw new DAV\Exception('The '.$sccs.' property must be of type: \Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet');
             }
             $components = implode(',', $properties[$sccs]->getValue());
         }
-        $transp = '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
+        $transp = '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-calendar-transp';
         if (isset($properties[$transp])) {
-            $values[':transparent'] = $properties[$transp]->getValue() === 'transparent' ? 1 : 0;
+            $values[':transparent'] = 'transparent' === $properties[$transp]->getValue() ? 1 : 0;
         }
-        $stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarTableName . " (synctoken, components) VALUES (1, ?)");
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarTableName.' (synctoken, components) VALUES (1, ?)');
         $stmt->execute([$components]);
 
         $calendarId = $this->pdo->lastInsertId(
-            $this->calendarTableName . '_id_seq'
+            $this->calendarTableName.'_id_seq'
         );
 
         $values[':calendarid'] = $calendarId;
 
         foreach ($this->propertyMap as $xmlName => $dbName) {
             if (isset($properties[$xmlName])) {
-
-                $values[':' . $dbName] = $properties[$xmlName];
+                $values[':'.$dbName] = $properties[$xmlName];
                 $fieldNames[] = $dbName;
             }
         }
 
-        $stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarInstancesTableName . " (" . implode(', ', $fieldNames) . ") VALUES (" . implode(', ', array_keys($values)) . ")");
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarInstancesTableName.' ('.implode(', ', $fieldNames).') VALUES ('.implode(', ', array_keys($values)).')');
 
         $stmt->execute($values);
 
         return [
             $calendarId,
-            $this->pdo->lastInsertId($this->calendarInstancesTableName . '_id_seq')
+            $this->pdo->lastInsertId($this->calendarInstancesTableName.'_id_seq'),
         ];
-
     }
 
     /**
@@ -298,100 +290,88 @@ SQL
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param mixed $calendarId
+     * @param mixed                $calendarId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch) {
-
+    public function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
         list($calendarId, $instanceId) = $calendarId;
 
         $supportedProperties = array_keys($this->propertyMap);
-        $supportedProperties[] = '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
+        $supportedProperties[] = '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-calendar-transp';
 
-        $propPatch->handle($supportedProperties, function($mutations) use ($calendarId, $instanceId) {
+        $propPatch->handle($supportedProperties, function ($mutations) use ($calendarId, $instanceId) {
             $newValues = [];
             foreach ($mutations as $propertyName => $propertyValue) {
-
                 switch ($propertyName) {
-                    case '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' :
+                    case '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-calendar-transp':
                         $fieldName = 'transparent';
-                        $newValues[$fieldName] = $propertyValue->getValue() === 'transparent';
+                        $newValues[$fieldName] = 'transparent' === $propertyValue->getValue();
                         break;
-                    default :
+                    default:
                         $fieldName = $this->propertyMap[$propertyName];
                         $newValues[$fieldName] = $propertyValue;
                         break;
                 }
-
             }
             $valuesSql = [];
             foreach ($newValues as $fieldName => $value) {
-                $valuesSql[] = $fieldName . ' = ?';
+                $valuesSql[] = $fieldName.' = ?';
             }
 
-            $stmt = $this->pdo->prepare("UPDATE " . $this->calendarInstancesTableName . " SET " . implode(', ', $valuesSql) . " WHERE id = ?");
+            $stmt = $this->pdo->prepare('UPDATE '.$this->calendarInstancesTableName.' SET '.implode(', ', $valuesSql).' WHERE id = ?');
             $newValues['id'] = $instanceId;
             $stmt->execute(array_values($newValues));
 
-            $this->addChange($calendarId, "", 2);
+            $this->addChange($calendarId, '', 2);
 
             return true;
-
         });
-
     }
 
     /**
-     * Delete a calendar and all it's objects
+     * Delete a calendar and all it's objects.
      *
      * @param mixed $calendarId
-     * @return void
      */
-    function deleteCalendar($calendarId) {
-
+    public function deleteCalendar($calendarId)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
         list($calendarId, $instanceId) = $calendarId;
 
-        $stmt = $this->pdo->prepare('SELECT access FROM ' . $this->calendarInstancesTableName . ' where id = ?');
+        $stmt = $this->pdo->prepare('SELECT access FROM '.$this->calendarInstancesTableName.' where id = ?');
         $stmt->execute([$instanceId]);
-        $access = (int)$stmt->fetchColumn();
-
-        if ($access === \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER) {
+        $access = (int) $stmt->fetchColumn();
 
+        if (\Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER === $access) {
             /**
              * If the user is the owner of the calendar, we delete all data and all
              * instances.
              **/
-            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ?');
+            $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
             $stmt->execute([$calendarId]);
 
-            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarChangesTableName . ' WHERE calendarid = ?');
+            $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarChangesTableName.' WHERE calendarid = ?');
             $stmt->execute([$calendarId]);
 
-            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarInstancesTableName . ' WHERE calendarid = ?');
+            $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarInstancesTableName.' WHERE calendarid = ?');
             $stmt->execute([$calendarId]);
 
-            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarTableName . ' WHERE id = ?');
+            $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarTableName.' WHERE id = ?');
             $stmt->execute([$calendarId]);
-
         } else {
-
             /**
              * If it was an instance of a shared calendar, we only delete that
              * instance.
              */
-            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarInstancesTableName . ' WHERE id = ?');
+            $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarInstancesTableName.' WHERE id = ?');
             $stmt->execute([$instanceId]);
-
         }
-
-
     }
 
     /**
@@ -423,32 +403,32 @@ SQL
      * amount of times this is needed is reduced by a great degree.
      *
      * @param mixed $calendarId
+     *
      * @return array
      */
-    function getCalendarObjects($calendarId) {
-
+    public function getCalendarObjects($calendarId)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
         list($calendarId, $instanceId) = $calendarId;
 
-        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ?');
+        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, componenttype FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
         $stmt->execute([$calendarId]);
 
         $result = [];
         foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
             $result[] = [
-                'id'           => $row['id'],
-                'uri'          => $row['uri'],
-                'lastmodified' => (int)$row['lastmodified'],
-                'etag'         => '"' . $row['etag'] . '"',
-                'size'         => (int)$row['size'],
-                'component'    => strtolower($row['componenttype']),
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'lastmodified' => (int) $row['lastmodified'],
+                'etag' => '"'.$row['etag'].'"',
+                'size' => (int) $row['size'],
+                'component' => strtolower($row['componenttype']),
             ];
         }
 
         return $result;
-
     }
 
     /**
@@ -463,33 +443,35 @@ SQL
      *
      * This method must return null if the object did not exist.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
+     *
      * @return array|null
      */
-    function getCalendarObject($calendarId, $objectUri) {
-
+    public function getCalendarObject($calendarId, $objectUri)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
         list($calendarId, $instanceId) = $calendarId;
 
-        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri = ?');
+        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarId, $objectUri]);
         $row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-        if (!$row) return null;
+        if (!$row) {
+            return null;
+        }
 
         return [
-            'id'           => $row['id'],
-            'uri'          => $row['uri'],
-            'lastmodified' => (int)$row['lastmodified'],
-            'etag'         => '"' . $row['etag'] . '"',
-            'size'         => (int)$row['size'],
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'lastmodified' => (int) $row['lastmodified'],
+            'etag' => '"'.$row['etag'].'"',
+            'size' => (int) $row['size'],
             'calendardata' => $row['calendardata'],
-            'component'    => strtolower($row['componenttype']),
+            'component' => strtolower($row['componenttype']),
          ];
-
     }
 
     /**
@@ -502,10 +484,11 @@ SQL
      *
      * @param mixed $calendarId
      * @param array $uris
+     *
      * @return array
      */
-    function getMultipleCalendarObjects($calendarId, array $uris) {
-
+    public function getMultipleCalendarObjects($calendarId, array $uris)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
@@ -513,7 +496,7 @@ SQL
 
         $result = [];
         foreach (array_chunk($uris, 900) as $chunk) {
-            $query = 'SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri IN (';
+            $query = 'SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri IN (';
             // Inserting a whole bunch of question marks
             $query .= implode(',', array_fill(0, count($chunk), '?'));
             $query .= ')';
@@ -522,24 +505,21 @@ SQL
             $stmt->execute(array_merge([$calendarId], $chunk));
 
             while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
                 $result[] = [
-                    'id'           => $row['id'],
-                    'uri'          => $row['uri'],
-                    'lastmodified' => (int)$row['lastmodified'],
-                    'etag'         => '"' . $row['etag'] . '"',
-                    'size'         => (int)$row['size'],
+                    'id' => $row['id'],
+                    'uri' => $row['uri'],
+                    'lastmodified' => (int) $row['lastmodified'],
+                    'etag' => '"'.$row['etag'].'"',
+                    'size' => (int) $row['size'],
                     'calendardata' => $row['calendardata'],
-                    'component'    => strtolower($row['componenttype']),
+                    'component' => strtolower($row['componenttype']),
                 ];
-
             }
         }
-        return $result;
 
+        return $result;
     }
 
-
     /**
      * Creates a new calendar object.
      *
@@ -553,13 +533,14 @@ SQL
      * calendar-data. If the result of a subsequent GET to this object is not
      * the exact same as this request body, you should omit the ETag.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
      * @param string $calendarData
+     *
      * @return string|null
      */
-    function createCalendarObject($calendarId, $objectUri, $calendarData) {
-
+    public function createCalendarObject($calendarId, $objectUri, $calendarData)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
@@ -567,7 +548,7 @@ SQL
 
         $extraData = $this->getDenormalizedData($calendarData);
 
-        $stmt = $this->pdo->prepare('INSERT INTO ' . $this->calendarObjectTableName . ' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence, uid) VALUES (?,?,?,?,?,?,?,?,?,?)');
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarObjectTableName.' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence, uid) VALUES (?,?,?,?,?,?,?,?,?,?)');
         $stmt->execute([
             $calendarId,
             $objectUri,
@@ -582,8 +563,7 @@ SQL
         ]);
         $this->addChange($calendarId, $objectUri, 1);
 
-        return '"' . $extraData['etag'] . '"';
-
+        return '"'.$extraData['etag'].'"';
     }
 
     /**
@@ -599,13 +579,14 @@ SQL
      * calendar-data. If the result of a subsequent GET to this object is not
      * the exact same as this request body, you should omit the ETag.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
      * @param string $calendarData
+     *
      * @return string|null
      */
-    function updateCalendarObject($calendarId, $objectUri, $calendarData) {
-
+    public function updateCalendarObject($calendarId, $objectUri, $calendarData)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
@@ -613,13 +594,12 @@ SQL
 
         $extraData = $this->getDenormalizedData($calendarData);
 
-        $stmt = $this->pdo->prepare('UPDATE ' . $this->calendarObjectTableName . ' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ?, uid = ? WHERE calendarid = ? AND uri = ?');
+        $stmt = $this->pdo->prepare('UPDATE '.$this->calendarObjectTableName.' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ?, uid = ? WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarData, time(), $extraData['etag'], $extraData['size'], $extraData['componentType'], $extraData['firstOccurence'], $extraData['lastOccurence'], $extraData['uid'], $calendarId, $objectUri]);
 
         $this->addChange($calendarId, $objectUri, 2);
 
-        return '"' . $extraData['etag'] . '"';
-
+        return '"'.$extraData['etag'].'"';
     }
 
     /**
@@ -635,10 +615,11 @@ SQL
      *   * uid - value of the UID property
      *
      * @param string $calendarData
+     *
      * @return array
      */
-    protected function getDenormalizedData($calendarData) {
-
+    protected function getDenormalizedData($calendarData)
+    {
         $vObject = VObject\Reader::read($calendarData);
         $componentType = null;
         $component = null;
@@ -646,16 +627,16 @@ SQL
         $lastOccurence = null;
         $uid = null;
         foreach ($vObject->getComponents() as $component) {
-            if ($component->name !== 'VTIMEZONE') {
+            if ('VTIMEZONE' !== $component->name) {
                 $componentType = $component->name;
-                $uid = (string)$component->UID;
+                $uid = (string) $component->UID;
                 break;
             }
         }
         if (!$componentType) {
             throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
         }
-        if ($componentType === 'VEVENT') {
+        if ('VEVENT' === $componentType) {
             $firstOccurence = $component->DTSTART->getDateTime()->getTimeStamp();
             // Finding the last occurence is a bit harder
             if (!isset($component->RRULE)) {
@@ -673,7 +654,7 @@ SQL
                     $lastOccurence = $firstOccurence;
                 }
             } else {
-                $it = new VObject\Recur\EventIterator($vObject, (string)$component->UID);
+                $it = new VObject\Recur\EventIterator($vObject, (string) $component->UID);
                 $maxDate = new \DateTime(self::MAX_DATE);
                 if ($it->isInfinite()) {
                     $lastOccurence = $maxDate->getTimeStamp();
@@ -682,30 +663,31 @@ SQL
                     while ($it->valid() && $end < $maxDate) {
                         $end = $it->getDtEnd();
                         $it->next();
-
                     }
                     $lastOccurence = $end->getTimeStamp();
                 }
-
             }
 
             // Ensure Occurence values are positive
-            if ($firstOccurence < 0) $firstOccurence = 0;
-            if ($lastOccurence < 0) $lastOccurence = 0;
+            if ($firstOccurence < 0) {
+                $firstOccurence = 0;
+            }
+            if ($lastOccurence < 0) {
+                $lastOccurence = 0;
+            }
         }
 
         // Destroy circular references to PHP will GC the object.
         $vObject->destroy();
 
         return [
-            'etag'           => md5($calendarData),
-            'size'           => strlen($calendarData),
-            'componentType'  => $componentType,
+            'etag' => md5($calendarData),
+            'size' => strlen($calendarData),
+            'componentType' => $componentType,
             'firstOccurence' => $firstOccurence,
-            'lastOccurence'  => $lastOccurence,
-            'uid'            => $uid,
+            'lastOccurence' => $lastOccurence,
+            'uid' => $uid,
         ];
-
     }
 
     /**
@@ -713,22 +695,20 @@ SQL
      *
      * The object uri is only the basename, or filename and not a full path.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
-     * @return void
      */
-    function deleteCalendarObject($calendarId, $objectUri) {
-
+    public function deleteCalendarObject($calendarId, $objectUri)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
         list($calendarId, $instanceId) = $calendarId;
 
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri = ?');
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarId, $objectUri]);
 
         $this->addChange($calendarId, $objectUri, 3);
-
     }
 
     /**
@@ -781,10 +761,11 @@ SQL
      *
      * @param mixed $calendarId
      * @param array $filters
+     *
      * @return array
      */
-    function calendarQuery($calendarId, array $filters) {
-
+    public function calendarQuery($calendarId, array $filters)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
@@ -808,7 +789,7 @@ SQL
                 $requirePostFilter = false;
             }
             // There was a time-range filter
-            if ($componentType == 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
+            if ('VEVENT' == $componentType && isset($filters['comp-filters'][0]['time-range'])) {
                 $timeRange = $filters['comp-filters'][0]['time-range'];
 
                 // If start time OR the end time is not specified, we can do a
@@ -817,13 +798,12 @@ SQL
                     $requirePostFilter = false;
                 }
             }
-
         }
 
         if ($requirePostFilter) {
-            $query = "SELECT uri, calendardata FROM " . $this->calendarObjectTableName . " WHERE calendarid = :calendarid";
+            $query = 'SELECT uri, calendardata FROM '.$this->calendarObjectTableName.' WHERE calendarid = :calendarid';
         } else {
-            $query = "SELECT uri FROM " . $this->calendarObjectTableName . " WHERE calendarid = :calendarid";
+            $query = 'SELECT uri FROM '.$this->calendarObjectTableName.' WHERE calendarid = :calendarid';
         }
 
         $values = [
@@ -831,16 +811,16 @@ SQL
         ];
 
         if ($componentType) {
-            $query .= " AND componenttype = :componenttype";
+            $query .= ' AND componenttype = :componenttype';
             $values['componenttype'] = $componentType;
         }
 
         if ($timeRange && $timeRange['start']) {
-            $query .= " AND lastoccurence > :startdate";
+            $query .= ' AND lastoccurence > :startdate';
             $values['startdate'] = $timeRange['start']->getTimeStamp();
         }
         if ($timeRange && $timeRange['end']) {
-            $query .= " AND firstoccurence < :enddate";
+            $query .= ' AND firstoccurence < :enddate';
             $values['enddate'] = $timeRange['end']->getTimeStamp();
         }
 
@@ -855,11 +835,9 @@ SQL
                 }
             }
             $result[] = $row['uri'];
-
         }
 
         return $result;
-
     }
 
     /**
@@ -879,10 +857,11 @@ SQL
      *
      * @param string $principalUri
      * @param string $uid
+     *
      * @return string|null
      */
-    function getCalendarObjectByUID($principalUri, $uid) {
-
+    public function getCalendarObjectByUID($principalUri, $uid)
+    {
         $query = <<<SQL
 SELECT
     calendar_instances.uri AS calendaruri, calendarobjects.uri as objecturi
@@ -901,9 +880,8 @@ SQL;
         $stmt->execute([$principalUri, $uid]);
 
         if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-            return $row['calendaruri'] . '/' . $row['objecturi'];
+            return $row['calendaruri'].'/'.$row['objecturi'];
         }
-
     }
 
     /**
@@ -956,37 +934,41 @@ SQL;
      *
      * The limit is 'suggestive'. You are free to ignore it.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $syncToken
-     * @param int $syncLevel
-     * @param int $limit
+     * @param int    $syncLevel
+     * @param int    $limit
+     *
      * @return array
      */
-    function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null) {
-
+    public function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
         list($calendarId, $instanceId) = $calendarId;
 
         // Current synctoken
-        $stmt = $this->pdo->prepare('SELECT synctoken FROM ' . $this->calendarTableName . ' WHERE id = ?');
+        $stmt = $this->pdo->prepare('SELECT synctoken FROM '.$this->calendarTableName.' WHERE id = ?');
         $stmt->execute([$calendarId]);
         $currentToken = $stmt->fetchColumn(0);
 
-        if (is_null($currentToken)) return null;
+        if (is_null($currentToken)) {
+            return null;
+        }
 
         $result = [
             'syncToken' => $currentToken,
-            'added'     => [],
-            'modified'  => [],
-            'deleted'   => [],
+            'added' => [],
+            'modified' => [],
+            'deleted' => [],
         ];
 
         if ($syncToken) {
-
-            $query = "SELECT uri, operation FROM " . $this->calendarChangesTableName . " WHERE synctoken >= ? AND synctoken < ? AND calendarid = ? ORDER BY synctoken";
-            if ($limit > 0) $query .= " LIMIT " . (int)$limit;
+            $query = 'SELECT uri, operation FROM '.$this->calendarChangesTableName.' WHERE synctoken >= ? AND synctoken < ? AND calendarid = ? ORDER BY synctoken';
+            if ($limit > 0) {
+                $query .= ' LIMIT '.(int) $limit;
+            }
 
             // Fetching all changes
             $stmt = $this->pdo->prepare($query);
@@ -997,60 +979,54 @@ SQL;
             // This loop ensures that any duplicates are overwritten, only the
             // last change on a node is relevant.
             while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
                 $changes[$row['uri']] = $row['operation'];
-
             }
 
             foreach ($changes as $uri => $operation) {
-
                 switch ($operation) {
-                    case 1 :
+                    case 1:
                         $result['added'][] = $uri;
                         break;
-                    case 2 :
+                    case 2:
                         $result['modified'][] = $uri;
                         break;
-                    case 3 :
+                    case 3:
                         $result['deleted'][] = $uri;
                         break;
                 }
-
             }
         } else {
             // No synctoken supplied, this is the initial sync.
-            $query = "SELECT uri FROM " . $this->calendarObjectTableName . " WHERE calendarid = ?";
+            $query = 'SELECT uri FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?';
             $stmt = $this->pdo->prepare($query);
             $stmt->execute([$calendarId]);
 
             $result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
         }
-        return $result;
 
+        return $result;
     }
 
     /**
      * Adds a change record to the calendarchanges table.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
-     * @param int $operation 1 = add, 2 = modify, 3 = delete.
-     * @return void
+     * @param int    $operation  1 = add, 2 = modify, 3 = delete
      */
-    protected function addChange($calendarId, $objectUri, $operation) {
-
-        $stmt = $this->pdo->prepare('INSERT INTO ' . $this->calendarChangesTableName . ' (uri, synctoken, calendarid, operation) SELECT ?, synctoken, ?, ? FROM ' . $this->calendarTableName . ' WHERE id = ?');
+    protected function addChange($calendarId, $objectUri, $operation)
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarChangesTableName.' (uri, synctoken, calendarid, operation) SELECT ?, synctoken, ?, ? FROM '.$this->calendarTableName.' WHERE id = ?');
         $stmt->execute([
             $objectUri,
             $calendarId,
             $operation,
-            $calendarId
+            $calendarId,
         ]);
-        $stmt = $this->pdo->prepare('UPDATE ' . $this->calendarTableName . ' SET synctoken = synctoken + 1 WHERE id = ?');
+        $stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET synctoken = synctoken + 1 WHERE id = ?');
         $stmt->execute([
-            $calendarId
+            $calendarId,
         ]);
-
     }
 
     /**
@@ -1082,10 +1058,11 @@ SQL;
      *    default components).
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getSubscriptionsForUser($principalUri) {
-
+    public function getSubscriptionsForUser($principalUri)
+    {
         $fields = array_values($this->subscriptionPropertyMap);
         $fields[] = 'id';
         $fields[] = 'uri';
@@ -1095,20 +1072,19 @@ SQL;
 
         // Making fields a comma-delimited list
         $fields = implode(', ', $fields);
-        $stmt = $this->pdo->prepare("SELECT " . $fields . " FROM " . $this->calendarSubscriptionsTableName . " WHERE principaluri = ? ORDER BY calendarorder ASC");
+        $stmt = $this->pdo->prepare('SELECT '.$fields.' FROM '.$this->calendarSubscriptionsTableName.' WHERE principaluri = ? ORDER BY calendarorder ASC');
         $stmt->execute([$principalUri]);
 
         $subscriptions = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
             $subscription = [
-                'id'           => $row['id'],
-                'uri'          => $row['uri'],
+                'id' => $row['id'],
+                'uri' => $row['uri'],
                 'principaluri' => $row['principaluri'],
-                'source'       => $row['source'],
+                'source' => $row['source'],
                 'lastmodified' => $row['lastmodified'],
 
-                '{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
+                '{'.CalDAV\Plugin::NS_CALDAV.'}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
             ];
 
             foreach ($this->subscriptionPropertyMap as $xmlName => $dbName) {
@@ -1118,11 +1094,9 @@ SQL;
             }
 
             $subscriptions[] = $subscription;
-
         }
 
         return $subscriptions;
-
     }
 
     /**
@@ -1133,11 +1107,12 @@ SQL;
      *
      * @param string $principalUri
      * @param string $uri
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return mixed
      */
-    function createSubscription($principalUri, $uri, array $properties) {
-
+    public function createSubscription($principalUri, $uri, array $properties)
+    {
         $fieldNames = [
             'principaluri',
             'uri',
@@ -1151,30 +1126,28 @@ SQL;
 
         $values = [
             ':principaluri' => $principalUri,
-            ':uri'          => $uri,
-            ':source'       => $properties['{http://calendarserver.org/ns/}source']->getHref(),
+            ':uri' => $uri,
+            ':source' => $properties['{http://calendarserver.org/ns/}source']->getHref(),
             ':lastmodified' => time(),
         ];
 
         foreach ($this->subscriptionPropertyMap as $xmlName => $dbName) {
             if (isset($properties[$xmlName])) {
-
-                $values[':' . $dbName] = $properties[$xmlName];
+                $values[':'.$dbName] = $properties[$xmlName];
                 $fieldNames[] = $dbName;
             }
         }
 
-        $stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarSubscriptionsTableName . " (" . implode(', ', $fieldNames) . ") VALUES (" . implode(', ', array_keys($values)) . ")");
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarSubscriptionsTableName.' ('.implode(', ', $fieldNames).') VALUES ('.implode(', ', array_keys($values)).')');
         $stmt->execute($values);
 
         return $this->pdo->lastInsertId(
-            $this->calendarSubscriptionsTableName . '_id_seq'
+            $this->calendarSubscriptionsTableName.'_id_seq'
         );
-
     }
 
     /**
-     * Updates a subscription
+     * Updates a subscription.
      *
      * The list of mutations is stored in a Sabre\DAV\PropPatch object.
      * To do the actual updates, you must tell this object which properties
@@ -1185,58 +1158,50 @@ SQL;
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param mixed $subscriptionId
+     * @param mixed                $subscriptionId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateSubscription($subscriptionId, DAV\PropPatch $propPatch) {
-
+    public function updateSubscription($subscriptionId, DAV\PropPatch $propPatch)
+    {
         $supportedProperties = array_keys($this->subscriptionPropertyMap);
         $supportedProperties[] = '{http://calendarserver.org/ns/}source';
 
-        $propPatch->handle($supportedProperties, function($mutations) use ($subscriptionId) {
-
+        $propPatch->handle($supportedProperties, function ($mutations) use ($subscriptionId) {
             $newValues = [];
 
             foreach ($mutations as $propertyName => $propertyValue) {
-
-                if ($propertyName === '{http://calendarserver.org/ns/}source') {
+                if ('{http://calendarserver.org/ns/}source' === $propertyName) {
                     $newValues['source'] = $propertyValue->getHref();
                 } else {
                     $fieldName = $this->subscriptionPropertyMap[$propertyName];
                     $newValues[$fieldName] = $propertyValue;
                 }
-
             }
 
             // Now we're generating the sql query.
             $valuesSql = [];
             foreach ($newValues as $fieldName => $value) {
-                $valuesSql[] = $fieldName . ' = ?';
+                $valuesSql[] = $fieldName.' = ?';
             }
 
-            $stmt = $this->pdo->prepare("UPDATE " . $this->calendarSubscriptionsTableName . " SET " . implode(', ', $valuesSql) . ", lastmodified = ? WHERE id = ?");
+            $stmt = $this->pdo->prepare('UPDATE '.$this->calendarSubscriptionsTableName.' SET '.implode(', ', $valuesSql).', lastmodified = ? WHERE id = ?');
             $newValues['lastmodified'] = time();
             $newValues['id'] = $subscriptionId;
             $stmt->execute(array_values($newValues));
 
             return true;
-
         });
-
     }
 
     /**
-     * Deletes a subscription
+     * Deletes a subscription.
      *
      * @param mixed $subscriptionId
-     * @return void
      */
-    function deleteSubscription($subscriptionId) {
-
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarSubscriptionsTableName . ' WHERE id = ?');
+    public function deleteSubscription($subscriptionId)
+    {
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarSubscriptionsTableName.' WHERE id = ?');
         $stmt->execute([$subscriptionId]);
-
     }
 
     /**
@@ -1253,24 +1218,26 @@ SQL;
      *
      * @param string $principalUri
      * @param string $objectUri
+     *
      * @return array
      */
-    function getSchedulingObject($principalUri, $objectUri) {
-
-        $stmt = $this->pdo->prepare('SELECT uri, calendardata, lastmodified, etag, size FROM ' . $this->schedulingObjectTableName . ' WHERE principaluri = ? AND uri = ?');
+    public function getSchedulingObject($principalUri, $objectUri)
+    {
+        $stmt = $this->pdo->prepare('SELECT uri, calendardata, lastmodified, etag, size FROM '.$this->schedulingObjectTableName.' WHERE principaluri = ? AND uri = ?');
         $stmt->execute([$principalUri, $objectUri]);
         $row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-        if (!$row) return null;
+        if (!$row) {
+            return null;
+        }
 
         return [
-            'uri'          => $row['uri'],
+            'uri' => $row['uri'],
             'calendardata' => $row['calendardata'],
             'lastmodified' => $row['lastmodified'],
-            'etag'         => '"' . $row['etag'] . '"',
-            'size'         => (int)$row['size'],
+            'etag' => '"'.$row['etag'].'"',
+            'size' => (int) $row['size'],
          ];
-
     }
 
     /**
@@ -1282,40 +1249,38 @@ SQL;
      * The main difference is that 'calendardata' is optional.
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getSchedulingObjects($principalUri) {
-
-        $stmt = $this->pdo->prepare('SELECT id, calendardata, uri, lastmodified, etag, size FROM ' . $this->schedulingObjectTableName . ' WHERE principaluri = ?');
+    public function getSchedulingObjects($principalUri)
+    {
+        $stmt = $this->pdo->prepare('SELECT id, calendardata, uri, lastmodified, etag, size FROM '.$this->schedulingObjectTableName.' WHERE principaluri = ?');
         $stmt->execute([$principalUri]);
 
         $result = [];
         foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
             $result[] = [
                 'calendardata' => $row['calendardata'],
-                'uri'          => $row['uri'],
+                'uri' => $row['uri'],
                 'lastmodified' => $row['lastmodified'],
-                'etag'         => '"' . $row['etag'] . '"',
-                'size'         => (int)$row['size'],
+                'etag' => '"'.$row['etag'].'"',
+                'size' => (int) $row['size'],
             ];
         }
 
         return $result;
-
     }
 
     /**
-     * Deletes a scheduling object
+     * Deletes a scheduling object.
      *
      * @param string $principalUri
      * @param string $objectUri
-     * @return void
      */
-    function deleteSchedulingObject($principalUri, $objectUri) {
-
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->schedulingObjectTableName . ' WHERE principaluri = ? AND uri = ?');
+    public function deleteSchedulingObject($principalUri, $objectUri)
+    {
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->schedulingObjectTableName.' WHERE principaluri = ? AND uri = ?');
         $stmt->execute([$principalUri, $objectUri]);
-
     }
 
     /**
@@ -1324,35 +1289,32 @@ SQL;
      * @param string $principalUri
      * @param string $objectUri
      * @param string $objectData
-     * @return void
      */
-    function createSchedulingObject($principalUri, $objectUri, $objectData) {
-
-        $stmt = $this->pdo->prepare('INSERT INTO ' . $this->schedulingObjectTableName . ' (principaluri, calendardata, uri, lastmodified, etag, size) VALUES (?, ?, ?, ?, ?, ?)');
+    public function createSchedulingObject($principalUri, $objectUri, $objectData)
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->schedulingObjectTableName.' (principaluri, calendardata, uri, lastmodified, etag, size) VALUES (?, ?, ?, ?, ?, ?)');
         $stmt->execute([$principalUri, $objectData, $objectUri, time(), md5($objectData), strlen($objectData)]);
-
     }
 
     /**
      * Updates the list of shares.
      *
-     * @param mixed $calendarId
+     * @param mixed                           $calendarId
      * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
-     * @return void
      */
-    function updateInvites($calendarId, array $sharees) {
-
+    public function updateInvites($calendarId, array $sharees)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
         }
         $currentInvites = $this->getInvites($calendarId);
         list($calendarId, $instanceId) = $calendarId;
 
-        $removeStmt = $this->pdo->prepare("DELETE FROM " . $this->calendarInstancesTableName . " WHERE calendarid = ? AND share_href = ? AND access IN (2,3)");
-        $updateStmt = $this->pdo->prepare("UPDATE " . $this->calendarInstancesTableName . " SET access = ?, share_displayname = ?, share_invitestatus = ? WHERE calendarid = ? AND share_href = ?");
+        $removeStmt = $this->pdo->prepare('DELETE FROM '.$this->calendarInstancesTableName.' WHERE calendarid = ? AND share_href = ? AND access IN (2,3)');
+        $updateStmt = $this->pdo->prepare('UPDATE '.$this->calendarInstancesTableName.' SET access = ?, share_displayname = ?, share_invitestatus = ? WHERE calendarid = ? AND share_href = ?');
 
         $insertStmt = $this->pdo->prepare('
-INSERT INTO ' . $this->calendarInstancesTableName . '
+INSERT INTO '.$this->calendarInstancesTableName.'
     (
         calendarid,
         principaluri,
@@ -1382,11 +1344,10 @@ INSERT INTO ' . $this->calendarInstancesTableName . '
         ?,
         ?,
         ?
-    FROM ' . $this->calendarInstancesTableName . ' WHERE id = ?');
+    FROM '.$this->calendarInstancesTableName.' WHERE id = ?');
 
         foreach ($sharees as $sharee) {
-
-            if ($sharee->access === \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS) {
+            if (\Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS === $sharee->access) {
                 // if access was set no NOACCESS, it means access for an
                 // existing sharee was removed.
                 $removeStmt->execute([$calendarId, $sharee->href]);
@@ -1404,7 +1365,6 @@ INSERT INTO ' . $this->calendarInstancesTableName . '
             }
 
             foreach ($currentInvites as $oldSharee) {
-
                 if ($oldSharee->href === $sharee->href) {
                     // This is an update
                     $sharee->properties = array_merge(
@@ -1416,11 +1376,10 @@ INSERT INTO ' . $this->calendarInstancesTableName . '
                         isset($sharee->properties['{DAV:}displayname']) ? $sharee->properties['{DAV:}displayname'] : null,
                         $sharee->inviteStatus ?: $oldSharee->inviteStatus,
                         $calendarId,
-                        $sharee->href
+                        $sharee->href,
                     ]);
                     continue 2;
                 }
-
             }
             // If we got here, it means it was a new sharee
             $insertStmt->execute([
@@ -1431,11 +1390,9 @@ INSERT INTO ' . $this->calendarInstancesTableName . '
                 $sharee->href,
                 isset($sharee->properties['{DAV:}displayname']) ? $sharee->properties['{DAV:}displayname'] : null,
                 $sharee->inviteStatus ?: \Sabre\DAV\Sharing\Plugin::INVITE_NORESPONSE,
-                $instanceId
+                $instanceId,
             ]);
-
         }
-
     }
 
     /**
@@ -1451,10 +1408,11 @@ INSERT INTO ' . $this->calendarInstancesTableName . '
      *   $properties
      *
      * @param mixed $calendarId
+     *
      * @return \Sabre\DAV\Xml\Element\Sharee[]
      */
-    function getInvites($calendarId) {
-
+    public function getInvites($calendarId)
+    {
         if (!is_array($calendarId)) {
             throw new \InvalidArgumentException('The value passed to getInvites() is expected to be an array with a calendarId and an instanceId');
         }
@@ -1477,35 +1435,29 @@ SQL;
 
         $result = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
             $result[] = new Sharee([
-                'href'   => isset($row['share_href']) ? $row['share_href'] : \Sabre\HTTP\encodePath($row['principaluri']),
-                'access' => (int)$row['access'],
+                'href' => isset($row['share_href']) ? $row['share_href'] : \Sabre\HTTP\encodePath($row['principaluri']),
+                'access' => (int) $row['access'],
                 /// Everyone is always immediately accepted, for now.
-                'inviteStatus' => (int)$row['share_invitestatus'],
-                'properties'   =>
-                    !empty($row['share_displayname'])
+                'inviteStatus' => (int) $row['share_invitestatus'],
+                'properties' => !empty($row['share_displayname'])
                     ? ['{DAV:}displayname' => $row['share_displayname']]
                     : [],
                 'principal' => $row['principaluri'],
             ]);
-
         }
-        return $result;
 
+        return $result;
     }
 
     /**
-     * Publishes a calendar
+     * Publishes a calendar.
      *
      * @param mixed $calendarId
-     * @param bool $value
-     * @return void
+     * @param bool  $value
      */
-    function setPublishStatus($calendarId, $value) {
-
+    public function setPublishStatus($calendarId, $value)
+    {
         throw new DAV\Exception\NotImplemented('Not implemented');
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/SchedulingSupport.php b/vendor/sabre/dav/lib/CalDAV/Backend/SchedulingSupport.php
index 6ec0bf06b..7986d8c33 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/SchedulingSupport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/SchedulingSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 /**
@@ -10,8 +12,8 @@ namespace Sabre\CalDAV\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface SchedulingSupport extends BackendInterface {
-
+interface SchedulingSupport extends BackendInterface
+{
     /**
      * Returns a single scheduling object for the inbox collection.
      *
@@ -26,9 +28,10 @@ interface SchedulingSupport extends BackendInterface {
      *
      * @param string $principalUri
      * @param string $objectUri
+     *
      * @return array
      */
-    function getSchedulingObject($principalUri, $objectUri);
+    public function getSchedulingObject($principalUri, $objectUri);
 
     /**
      * Returns all scheduling objects for the inbox collection.
@@ -39,18 +42,18 @@ interface SchedulingSupport extends BackendInterface {
      * The main difference is that 'calendardata' is optional.
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getSchedulingObjects($principalUri);
+    public function getSchedulingObjects($principalUri);
 
     /**
      * Deletes a scheduling object from the inbox collection.
      *
      * @param string $principalUri
      * @param string $objectUri
-     * @return void
      */
-    function deleteSchedulingObject($principalUri, $objectUri);
+    public function deleteSchedulingObject($principalUri, $objectUri);
 
     /**
      * Creates a new scheduling object. This should land in a users' inbox.
@@ -58,8 +61,6 @@ interface SchedulingSupport extends BackendInterface {
      * @param string $principalUri
      * @param string $objectUri
      * @param string $objectData
-     * @return void
      */
-    function createSchedulingObject($principalUri, $objectUri, $objectData);
-
+    public function createSchedulingObject($principalUri, $objectUri, $objectData);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php b/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php
index 278ec2564..ce6105990 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 /**
@@ -20,16 +22,15 @@ namespace Sabre\CalDAV\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface SharingSupport extends BackendInterface {
-
+interface SharingSupport extends BackendInterface
+{
     /**
      * Updates the list of shares.
      *
-     * @param mixed $calendarId
+     * @param mixed                           $calendarId
      * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
-     * @return void
      */
-    function updateInvites($calendarId, array $sharees);
+    public function updateInvites($calendarId, array $sharees);
 
     /**
      * Returns the list of people whom this calendar is shared with.
@@ -44,17 +45,16 @@ interface SharingSupport extends BackendInterface {
      *   $properties
      *
      * @param mixed $calendarId
+     *
      * @return \Sabre\DAV\Xml\Element\Sharee[]
      */
-    function getInvites($calendarId);
+    public function getInvites($calendarId);
 
     /**
-     * Publishes a calendar
+     * Publishes a calendar.
      *
      * @param mixed $calendarId
-     * @param bool $value
-     * @return void
+     * @param bool  $value
      */
-    function setPublishStatus($calendarId, $value);
-
+    public function setPublishStatus($calendarId, $value);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/SimplePDO.php b/vendor/sabre/dav/lib/CalDAV/Backend/SimplePDO.php
index d21f7f916..b6f3c8bef 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/SimplePDO.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/SimplePDO.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use Sabre\CalDAV;
@@ -31,24 +33,23 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SimplePDO extends AbstractBackend {
-
+class SimplePDO extends AbstractBackend
+{
     /**
-     * pdo
+     * pdo.
      *
      * @var \PDO
      */
     protected $pdo;
 
     /**
-     * Creates the backend
+     * Creates the backend.
      *
      * @param \PDO $pdo
      */
-    function __construct(\PDO $pdo) {
-
+    public function __construct(\PDO $pdo)
+    {
         $this->pdo = $pdo;
-
     }
 
     /**
@@ -73,27 +74,25 @@ class SimplePDO extends AbstractBackend {
      * ACL will automatically be put in read-only mode.
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getCalendarsForUser($principalUri) {
-
+    public function getCalendarsForUser($principalUri)
+    {
         // Making fields a comma-delimited list
-        $stmt = $this->pdo->prepare("SELECT id, uri FROM simple_calendars WHERE principaluri = ? ORDER BY id ASC");
+        $stmt = $this->pdo->prepare('SELECT id, uri FROM simple_calendars WHERE principaluri = ? ORDER BY id ASC');
         $stmt->execute([$principalUri]);
 
         $calendars = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
             $calendars[] = [
-                'id'           => $row['id'],
-                'uri'          => $row['uri'],
+                'id' => $row['id'],
+                'uri' => $row['uri'],
                 'principaluri' => $principalUri,
             ];
-
         }
 
         return $calendars;
-
     }
 
     /**
@@ -104,32 +103,30 @@ class SimplePDO extends AbstractBackend {
      *
      * @param string $principalUri
      * @param string $calendarUri
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return string
      */
-    function createCalendar($principalUri, $calendarUri, array $properties) {
-
-        $stmt = $this->pdo->prepare("INSERT INTO simple_calendars (principaluri, uri) VALUES (?, ?)");
+    public function createCalendar($principalUri, $calendarUri, array $properties)
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO simple_calendars (principaluri, uri) VALUES (?, ?)');
         $stmt->execute([$principalUri, $calendarUri]);
 
         return $this->pdo->lastInsertId();
-
     }
 
     /**
-     * Delete a calendar and all it's objects
+     * Delete a calendar and all it's objects.
      *
      * @param string $calendarId
-     * @return void
      */
-    function deleteCalendar($calendarId) {
-
+    public function deleteCalendar($calendarId)
+    {
         $stmt = $this->pdo->prepare('DELETE FROM simple_calendarobjects WHERE calendarid = ?');
         $stmt->execute([$calendarId]);
 
         $stmt = $this->pdo->prepare('DELETE FROM simple_calendars WHERE id = ?');
         $stmt->execute([$calendarId]);
-
     }
 
     /**
@@ -161,27 +158,27 @@ class SimplePDO extends AbstractBackend {
      * amount of times this is needed is reduced by a great degree.
      *
      * @param string $calendarId
+     *
      * @return array
      */
-    function getCalendarObjects($calendarId) {
-
+    public function getCalendarObjects($calendarId)
+    {
         $stmt = $this->pdo->prepare('SELECT id, uri, calendardata FROM simple_calendarobjects WHERE calendarid = ?');
         $stmt->execute([$calendarId]);
 
         $result = [];
         foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
             $result[] = [
-                'id'           => $row['id'],
-                'uri'          => $row['uri'],
-                'etag'         => '"' . md5($row['calendardata']) . '"',
-                'calendarid'   => $calendarId,
-                'size'         => strlen($row['calendardata']),
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'etag' => '"'.md5($row['calendardata']).'"',
+                'calendarid' => $calendarId,
+                'size' => strlen($row['calendardata']),
                 'calendardata' => $row['calendardata'],
             ];
         }
 
         return $result;
-
     }
 
     /**
@@ -198,25 +195,27 @@ class SimplePDO extends AbstractBackend {
      *
      * @param string $calendarId
      * @param string $objectUri
+     *
      * @return array|null
      */
-    function getCalendarObject($calendarId, $objectUri) {
-
+    public function getCalendarObject($calendarId, $objectUri)
+    {
         $stmt = $this->pdo->prepare('SELECT id, uri, calendardata FROM simple_calendarobjects WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarId, $objectUri]);
         $row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-        if (!$row) return null;
+        if (!$row) {
+            return null;
+        }
 
         return [
-            'id'           => $row['id'],
-            'uri'          => $row['uri'],
-            'etag'         => '"' . md5($row['calendardata']) . '"',
-            'calendarid'   => $calendarId,
-            'size'         => strlen($row['calendardata']),
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'etag' => '"'.md5($row['calendardata']).'"',
+            'calendarid' => $calendarId,
+            'size' => strlen($row['calendardata']),
             'calendardata' => $row['calendardata'],
          ];
-
     }
 
     /**
@@ -232,22 +231,22 @@ class SimplePDO extends AbstractBackend {
      * calendar-data. If the result of a subsequent GET to this object is not
      * the exact same as this request body, you should omit the ETag.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
      * @param string $calendarData
+     *
      * @return string|null
      */
-    function createCalendarObject($calendarId, $objectUri, $calendarData) {
-
+    public function createCalendarObject($calendarId, $objectUri, $calendarData)
+    {
         $stmt = $this->pdo->prepare('INSERT INTO simple_calendarobjects (calendarid, uri, calendardata) VALUES (?,?,?)');
         $stmt->execute([
             $calendarId,
             $objectUri,
-            $calendarData
+            $calendarData,
         ]);
 
-        return '"' . md5($calendarData) . '"';
-
+        return '"'.md5($calendarData).'"';
     }
 
     /**
@@ -263,18 +262,18 @@ class SimplePDO extends AbstractBackend {
      * calendar-data. If the result of a subsequent GET to this object is not
      * the exact same as this request body, you should omit the ETag.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
      * @param string $calendarData
+     *
      * @return string|null
      */
-    function updateCalendarObject($calendarId, $objectUri, $calendarData) {
-
+    public function updateCalendarObject($calendarId, $objectUri, $calendarData)
+    {
         $stmt = $this->pdo->prepare('UPDATE simple_calendarobjects SET calendardata = ? WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarData, $calendarId, $objectUri]);
 
-        return '"' . md5($calendarData) . '"';
-
+        return '"'.md5($calendarData).'"';
     }
 
     /**
@@ -284,13 +283,10 @@ class SimplePDO extends AbstractBackend {
      *
      * @param string $calendarId
      * @param string $objectUri
-     * @return void
      */
-    function deleteCalendarObject($calendarId, $objectUri) {
-
+    public function deleteCalendarObject($calendarId, $objectUri)
+    {
         $stmt = $this->pdo->prepare('DELETE FROM simple_calendarobjects WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarId, $objectUri]);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/SubscriptionSupport.php b/vendor/sabre/dav/lib/CalDAV/Backend/SubscriptionSupport.php
index d77a2fe0f..2aaf95cdb 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/SubscriptionSupport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/SubscriptionSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use Sabre\DAV;
@@ -11,8 +13,8 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface SubscriptionSupport extends BackendInterface {
-
+interface SubscriptionSupport extends BackendInterface
+{
     /**
      * Returns a list of subscriptions for a principal.
      *
@@ -43,9 +45,10 @@ interface SubscriptionSupport extends BackendInterface {
      *    default components).
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getSubscriptionsForUser($principalUri);
+    public function getSubscriptionsForUser($principalUri);
 
     /**
      * Creates a new subscription for a principal.
@@ -55,13 +58,14 @@ interface SubscriptionSupport extends BackendInterface {
      *
      * @param string $principalUri
      * @param string $uri
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return mixed
      */
-    function createSubscription($principalUri, $uri, array $properties);
+    public function createSubscription($principalUri, $uri, array $properties);
 
     /**
-     * Updates a subscription
+     * Updates a subscription.
      *
      * The list of mutations is stored in a Sabre\DAV\PropPatch object.
      * To do the actual updates, you must tell this object which properties
@@ -72,18 +76,15 @@ interface SubscriptionSupport extends BackendInterface {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param mixed $subscriptionId
+     * @param mixed                $subscriptionId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateSubscription($subscriptionId, DAV\PropPatch $propPatch);
+    public function updateSubscription($subscriptionId, DAV\PropPatch $propPatch);
 
     /**
      * Deletes a subscription.
      *
      * @param mixed $subscriptionId
-     * @return void
      */
-    function deleteSubscription($subscriptionId);
-
+    public function deleteSubscription($subscriptionId);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/SyncSupport.php b/vendor/sabre/dav/lib/CalDAV/Backend/SyncSupport.php
index a934505f9..c7f67d176 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/SyncSupport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/SyncSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 /**
@@ -18,8 +20,8 @@ namespace Sabre\CalDAV\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface SyncSupport extends BackendInterface {
-
+interface SyncSupport extends BackendInterface
+{
     /**
      * The getChanges method returns all the changes that have happened, since
      * the specified syncToken in the specified calendar.
@@ -72,10 +74,10 @@ interface SyncSupport extends BackendInterface {
      *
      * @param string $calendarId
      * @param string $syncToken
-     * @param int $syncLevel
-     * @param int $limit
+     * @param int    $syncLevel
+     * @param int    $limit
+     *
      * @return array
      */
-    function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null);
-
+    public function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Calendar.php b/vendor/sabre/dav/lib/CalDAV/Calendar.php
index 7467900cc..717f04f94 100644
--- a/vendor/sabre/dav/lib/CalDAV/Calendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/Calendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
@@ -16,46 +18,44 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection, DAV\IMultiGet {
-
+class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection, DAV\IMultiGet
+{
     use DAVACL\ACLTrait;
 
     /**
-     * This is an array with calendar information
+     * This is an array with calendar information.
      *
      * @var array
      */
     protected $calendarInfo;
 
     /**
-     * CalDAV backend
+     * CalDAV backend.
      *
      * @var Backend\BackendInterface
      */
     protected $caldavBackend;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Backend\BackendInterface $caldavBackend
-     * @param array $calendarInfo
+     * @param array                    $calendarInfo
      */
-    function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo) {
-
+    public function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo)
+    {
         $this->caldavBackend = $caldavBackend;
         $this->calendarInfo = $calendarInfo;
-
     }
 
     /**
-     * Returns the name of the calendar
+     * Returns the name of the calendar.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->calendarInfo['uri'];
-
     }
 
     /**
@@ -68,69 +68,68 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      * Read the PropPatch documentation for more information.
      *
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch(PropPatch $propPatch) {
-
+    public function propPatch(PropPatch $propPatch)
+    {
         return $this->caldavBackend->updateCalendar($this->calendarInfo['id'], $propPatch);
-
     }
 
     /**
-     * Returns the list of properties
+     * Returns the list of properties.
      *
      * @param array $requestedProperties
+     *
      * @return array
      */
-    function getProperties($requestedProperties) {
-
+    public function getProperties($requestedProperties)
+    {
         $response = [];
 
         foreach ($this->calendarInfo as $propName => $propValue) {
-
-            if (!is_null($propValue) && $propName[0] === '{')
+            if (!is_null($propValue) && '{' === $propName[0]) {
                 $response[$propName] = $this->calendarInfo[$propName];
-
+            }
         }
-        return $response;
 
+        return $response;
     }
 
     /**
-     * Returns a calendar object
+     * Returns a calendar object.
      *
      * The contained calendar objects are for example Events or Todo's.
      *
      * @param string $name
+     *
      * @return \Sabre\CalDAV\ICalendarObject
      */
-    function getChild($name) {
-
+    public function getChild($name)
+    {
         $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
 
-        if (!$obj) throw new DAV\Exception\NotFound('Calendar object not found');
-
+        if (!$obj) {
+            throw new DAV\Exception\NotFound('Calendar object not found');
+        }
         $obj['acl'] = $this->getChildACL();
 
         return new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
-
     }
 
     /**
-     * Returns the full list of calendar objects
+     * Returns the full list of calendar objects.
      *
      * @return array
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $objs = $this->caldavBackend->getCalendarObjects($this->calendarInfo['id']);
         $children = [];
         foreach ($objs as $obj) {
             $obj['acl'] = $this->getChildACL();
             $children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
         }
-        return $children;
 
+        return $children;
     }
 
     /**
@@ -140,77 +139,75 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      * If any children are not found, you do not have to return them.
      *
      * @param string[] $paths
+     *
      * @return array
      */
-    function getMultipleChildren(array $paths) {
-
+    public function getMultipleChildren(array $paths)
+    {
         $objs = $this->caldavBackend->getMultipleCalendarObjects($this->calendarInfo['id'], $paths);
         $children = [];
         foreach ($objs as $obj) {
             $obj['acl'] = $this->getChildACL();
             $children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
         }
-        return $children;
 
+        return $children;
     }
 
     /**
      * Checks if a child-node exists.
      *
      * @param string $name
+     *
      * @return bool
      */
-    function childExists($name) {
-
+    public function childExists($name)
+    {
         $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
-        if (!$obj)
+        if (!$obj) {
             return false;
-        else
+        } else {
             return true;
-
+        }
     }
 
     /**
-     * Creates a new directory
+     * Creates a new directory.
      *
      * We actually block this, as subdirectories are not allowed in calendars.
      *
      * @param string $name
-     * @return void
      */
-    function createDirectory($name) {
-
+    public function createDirectory($name)
+    {
         throw new DAV\Exception\MethodNotAllowed('Creating collections in calendar objects is not allowed');
-
     }
 
     /**
-     * Creates a new file
+     * Creates a new file.
      *
      * The contents of the new file must be a valid ICalendar string.
      *
-     * @param string $name
+     * @param string   $name
      * @param resource $calendarData
+     *
      * @return string|null
      */
-    function createFile($name, $calendarData = null) {
-
+    public function createFile($name, $calendarData = null)
+    {
         if (is_resource($calendarData)) {
             $calendarData = stream_get_contents($calendarData);
         }
-        return $this->caldavBackend->createCalendarObject($this->calendarInfo['id'], $name, $calendarData);
 
+        return $this->caldavBackend->createCalendarObject($this->calendarInfo['id'], $name, $calendarData);
     }
 
     /**
      * Deletes the calendar.
-     *
-     * @return void
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->caldavBackend->deleteCalendar($this->calendarInfo['id']);
-
     }
 
     /**
@@ -218,36 +215,30 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      * {DAV:}displayname to display a name to display a name.
      *
      * @param string $newName
-     * @return void
      */
-    function setName($newName) {
-
+    public function setName($newName)
+    {
         throw new DAV\Exception\MethodNotAllowed('Renaming calendars is not yet supported');
-
     }
 
     /**
      * Returns the last modification date as a unix timestamp.
-     *
-     * @return null
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->calendarInfo['principaluri'];
-
     }
 
     /**
@@ -262,8 +253,8 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         $acl = [
             [
                 'privilege' => '{DAV:}read',
@@ -272,20 +263,19 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'principal' => $this->getOwner().'/calendar-proxy-read',
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+                'privilege' => '{'.Plugin::NS_CALDAV.'}read-free-busy',
                 'principal' => '{DAV:}authenticated',
                 'protected' => true,
             ],
-
         ];
         if (empty($this->calendarInfo['{http://sabredav.org/ns}read-only'])) {
             $acl[] = [
@@ -295,13 +285,12 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
             ];
             $acl[] = [
                 'privilege' => '{DAV:}write',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ];
         }
 
         return $acl;
-
     }
 
     /**
@@ -311,8 +300,8 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      *
      * @return array
      */
-    function getChildACL() {
-
+    public function getChildACL()
+    {
         $acl = [
             [
                 'privilege' => '{DAV:}read',
@@ -322,15 +311,14 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
 
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'principal' => $this->getOwner().'/calendar-proxy-read',
                 'protected' => true,
             ],
-
         ];
         if (empty($this->calendarInfo['{http://sabredav.org/ns}read-only'])) {
             $acl[] = [
@@ -340,16 +328,14 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
             ];
             $acl[] = [
                 'privilege' => '{DAV:}write',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ];
-
         }
-        return $acl;
 
+        return $acl;
     }
 
-
     /**
      * Performs a calendar-query on the contents of this calendar.
      *
@@ -365,12 +351,12 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      * documented by Sabre\CalDAV\CalendarQueryParser.
      *
      * @param array $filters
+     *
      * @return array
      */
-    function calendarQuery(array $filters) {
-
+    public function calendarQuery(array $filters)
+    {
         return $this->caldavBackend->calendarQuery($this->calendarInfo['id'], $filters);
-
     }
 
     /**
@@ -382,8 +368,8 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      *
      * @return string|null
      */
-    function getSyncToken() {
-
+    public function getSyncToken()
+    {
         if (
             $this->caldavBackend instanceof Backend\SyncSupport &&
             isset($this->calendarInfo['{DAV:}sync-token'])
@@ -396,7 +382,6 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
         ) {
             return $this->calendarInfo['{http://sabredav.org/ns}sync-token'];
         }
-
     }
 
     /**
@@ -450,12 +435,13 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
      * The limit is 'suggestive'. You are free to ignore it.
      *
      * @param string $syncToken
-     * @param int $syncLevel
-     * @param int $limit
+     * @param int    $syncLevel
+     * @param int    $limit
+     *
      * @return array
      */
-    function getChanges($syncToken, $syncLevel, $limit = null) {
-
+    public function getChanges($syncToken, $syncLevel, $limit = null)
+    {
         if (!$this->caldavBackend instanceof Backend\SyncSupport) {
             return null;
         }
@@ -466,7 +452,5 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
             $syncLevel,
             $limit
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/CalendarHome.php b/vendor/sabre/dav/lib/CalDAV/CalendarHome.php
index ffd7f72fb..663d449bf 100644
--- a/vendor/sabre/dav/lib/CalDAV/CalendarHome.php
+++ b/vendor/sabre/dav/lib/CalDAV/CalendarHome.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
 use Sabre\DAV\Exception\NotFound;
 use Sabre\DAV\MkCol;
 use Sabre\DAVACL;
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
  * The CalendarHome represents a node that is usually in a users'
@@ -20,81 +22,74 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
-
+class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL
+{
     use DAVACL\ACLTrait;
 
     /**
-     * CalDAV backend
+     * CalDAV backend.
      *
      * @var Backend\BackendInterface
      */
     protected $caldavBackend;
 
     /**
-     * Principal information
+     * Principal information.
      *
      * @var array
      */
     protected $principalInfo;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Backend\BackendInterface $caldavBackend
-     * @param array $principalInfo
+     * @param array                    $principalInfo
      */
-    function __construct(Backend\BackendInterface $caldavBackend, $principalInfo) {
-
+    public function __construct(Backend\BackendInterface $caldavBackend, $principalInfo)
+    {
         $this->caldavBackend = $caldavBackend;
         $this->principalInfo = $principalInfo;
-
     }
 
     /**
-     * Returns the name of this object
+     * Returns the name of this object.
      *
      * @return string
      */
-    function getName() {
+    public function getName()
+    {
+        list(, $name) = Uri\split($this->principalInfo['uri']);
 
-        list(, $name) = URLUtil::splitPath($this->principalInfo['uri']);
         return $name;
-
     }
 
     /**
-     * Updates the name of this object
+     * Updates the name of this object.
      *
      * @param string $name
-     * @return void
      */
-    function setName($name) {
-
+    public function setName($name)
+    {
         throw new DAV\Exception\Forbidden();
-
     }
 
     /**
-     * Deletes this object
-     *
-     * @return void
+     * Deletes this object.
      */
-    function delete() {
-
+    public function delete()
+    {
         throw new DAV\Exception\Forbidden();
-
     }
 
     /**
-     * Returns the last modification date
+     * Returns the last modification date.
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
 
     /**
@@ -102,14 +97,12 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * This is currently not allowed
      *
-     * @param string $filename
+     * @param string   $filename
      * @param resource $data
-     * @return void
      */
-    function createFile($filename, $data = null) {
-
+    public function createFile($filename, $data = null)
+    {
         throw new DAV\Exception\MethodNotAllowed('Creating new files in this collection is not supported');
-
     }
 
     /**
@@ -118,30 +111,29 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
      * This is currently not allowed.
      *
      * @param string $filename
-     * @return void
      */
-    function createDirectory($filename) {
-
+    public function createDirectory($filename)
+    {
         throw new DAV\Exception\MethodNotAllowed('Creating new collections in this collection is not supported');
-
     }
 
     /**
-     * Returns a single calendar, by name
+     * Returns a single calendar, by name.
      *
      * @param string $name
+     *
      * @return Calendar
      */
-    function getChild($name) {
-
+    public function getChild($name)
+    {
         // Special nodes
-        if ($name === 'inbox' && $this->caldavBackend instanceof Backend\SchedulingSupport) {
+        if ('inbox' === $name && $this->caldavBackend instanceof Backend\SchedulingSupport) {
             return new Schedule\Inbox($this->caldavBackend, $this->principalInfo['uri']);
         }
-        if ($name === 'outbox' && $this->caldavBackend instanceof Backend\SchedulingSupport) {
+        if ('outbox' === $name && $this->caldavBackend instanceof Backend\SchedulingSupport) {
             return new Schedule\Outbox($this->principalInfo['uri']);
         }
-        if ($name === 'notifications' && $this->caldavBackend instanceof Backend\NotificationSupport) {
+        if ('notifications' === $name && $this->caldavBackend instanceof Backend\NotificationSupport) {
             return new Notifications\Collection($this->caldavBackend, $this->principalInfo['uri']);
         }
 
@@ -162,36 +154,34 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
                     return new Subscriptions\Subscription($this->caldavBackend, $subscription);
                 }
             }
-
         }
 
-        throw new NotFound('Node with name \'' . $name . '\' could not be found');
-
+        throw new NotFound('Node with name \''.$name.'\' could not be found');
     }
 
     /**
      * Checks if a calendar exists.
      *
      * @param string $name
+     *
      * @return bool
      */
-    function childExists($name) {
-
+    public function childExists($name)
+    {
         try {
-            return !!$this->getChild($name);
+            return (bool) $this->getChild($name);
         } catch (NotFound $e) {
             return false;
         }
-
     }
 
     /**
-     * Returns a list of calendars
+     * Returns a list of calendars.
      *
      * @return array
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $calendars = $this->caldavBackend->getCalendarsForUser($this->principalInfo['uri']);
         $objs = [];
         foreach ($calendars as $calendar) {
@@ -220,35 +210,34 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
         }
 
         return $objs;
-
     }
 
     /**
      * Creates a new calendar or subscription.
      *
      * @param string $name
-     * @param MkCol $mkCol
+     * @param MkCol  $mkCol
+     *
      * @throws DAV\Exception\InvalidResourceType
-     * @return void
      */
-    function createExtendedCollection($name, MkCol $mkCol) {
-
+    public function createExtendedCollection($name, MkCol $mkCol)
+    {
         $isCalendar = false;
         $isSubscription = false;
         foreach ($mkCol->getResourceType() as $rt) {
             switch ($rt) {
-                case '{DAV:}collection' :
-                case '{http://calendarserver.org/ns/}shared-owner' :
+                case '{DAV:}collection':
+                case '{http://calendarserver.org/ns/}shared-owner':
                     // ignore
                     break;
-                case '{urn:ietf:params:xml:ns:caldav}calendar' :
+                case '{urn:ietf:params:xml:ns:caldav}calendar':
                     $isCalendar = true;
                     break;
-                case '{http://calendarserver.org/ns/}subscribed' :
+                case '{http://calendarserver.org/ns/}subscribed':
                     $isSubscription = true;
                     break;
-                default :
-                    throw new DAV\Exception\InvalidResourceType('Unknown resourceType: ' . $rt);
+                default:
+                    throw new DAV\Exception\InvalidResourceType('Unknown resourceType: '.$rt);
             }
         }
 
@@ -260,15 +249,11 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
                 throw new DAV\Exception\InvalidResourceType('This backend does not support subscriptions');
             }
             $this->caldavBackend->createSubscription($this->principalInfo['uri'], $name, $properties);
-
         } elseif ($isCalendar) {
             $this->caldavBackend->createCalendar($this->principalInfo['uri'], $name, $properties);
-
         } else {
             throw new DAV\Exception\InvalidResourceType('You can only create calendars and subscriptions in this collection');
-
         }
-
     }
 
     /**
@@ -276,10 +261,9 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return string
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->principalInfo['uri'];
-
     }
 
     /**
@@ -294,8 +278,8 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return [
             [
                 'privilege' => '{DAV:}read',
@@ -309,46 +293,43 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->principalInfo['uri'] . '/calendar-proxy-write',
+                'principal' => $this->principalInfo['uri'].'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}write',
-                'principal' => $this->principalInfo['uri'] . '/calendar-proxy-write',
+                'principal' => $this->principalInfo['uri'].'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->principalInfo['uri'] . '/calendar-proxy-read',
+                'principal' => $this->principalInfo['uri'].'/calendar-proxy-read',
                 'protected' => true,
             ],
-
         ];
-
     }
 
-
     /**
      * This method is called when a user replied to a request to share.
      *
      * This method should return the url of the newly created calendar if the
      * share was accepted.
      *
-     * @param string $href The sharee who is replying (often a mailto: address)
-     * @param int    $status One of the SharingPlugin::STATUS_* constants
+     * @param string $href        The sharee who is replying (often a mailto: address)
+     * @param int    $status      One of the SharingPlugin::STATUS_* constants
      * @param string $calendarUri The url to the calendar thats being shared
-     * @param string $inReplyTo The unique id this message is a response to
-     * @param string $summary A description of the reply
-     * @return null|string
+     * @param string $inReplyTo   The unique id this message is a response to
+     * @param string $summary     A description of the reply
+     *
+     * @return string|null
      */
-    function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null) {
-
+    public function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null)
+    {
         if (!$this->caldavBackend instanceof Backend\SharingSupport) {
             throw new DAV\Exception\NotImplemented('Sharing support is not implemented by this backend.');
         }
 
         return $this->caldavBackend->shareReply($href, $status, $calendarUri, $inReplyTo, $summary);
-
     }
 
     /**
@@ -367,12 +348,11 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
      * collection should be ignored.
      *
      * @param string $uid
+     *
      * @return string|null
      */
-    function getCalendarObjectByUID($uid) {
-
+    public function getCalendarObjectByUID($uid)
+    {
         return $this->caldavBackend->getCalendarObjectByUID($this->principalInfo['uri'], $uid);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/CalendarObject.php b/vendor/sabre/dav/lib/CalDAV/CalendarObject.php
index 9d6532a35..3f28ee7f7 100644
--- a/vendor/sabre/dav/lib/CalDAV/CalendarObject.php
+++ b/vendor/sabre/dav/lib/CalDAV/CalendarObject.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 /**
@@ -9,33 +11,33 @@ namespace Sabre\CalDAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\DAVACL\IACL {
-
+class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\DAVACL\IACL
+{
     use \Sabre\DAVACL\ACLTrait;
 
     /**
-     * Sabre\CalDAV\Backend\BackendInterface
+     * Sabre\CalDAV\Backend\BackendInterface.
      *
      * @var Backend\AbstractBackend
      */
     protected $caldavBackend;
 
     /**
-     * Array with information about this CalendarObject
+     * Array with information about this CalendarObject.
      *
      * @var array
      */
     protected $objectData;
 
     /**
-     * Array with information about the containing calendar
+     * Array with information about the containing calendar.
      *
      * @var array
      */
     protected $calendarInfo;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * The following properties may be passed within $objectData:
      *
@@ -49,11 +51,11 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *   * acl - (optional) Use this to override the default ACL for the node.
      *
      * @param Backend\BackendInterface $caldavBackend
-     * @param array $calendarInfo
-     * @param array $objectData
+     * @param array                    $calendarInfo
+     * @param array                    $objectData
      */
-    function __construct(Backend\BackendInterface $caldavBackend, array $calendarInfo, array $objectData) {
-
+    public function __construct(Backend\BackendInterface $caldavBackend, array $calendarInfo, array $objectData)
+    {
         $this->caldavBackend = $caldavBackend;
 
         if (!isset($objectData['uri'])) {
@@ -62,44 +64,43 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
 
         $this->calendarInfo = $calendarInfo;
         $this->objectData = $objectData;
-
     }
 
     /**
-     * Returns the uri for this object
+     * Returns the uri for this object.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->objectData['uri'];
-
     }
 
     /**
-     * Returns the ICalendar-formatted object
+     * Returns the ICalendar-formatted object.
      *
      * @return string
      */
-    function get() {
-
+    public function get()
+    {
         // Pre-populating the 'calendardata' is optional, if we don't have it
         // already we fetch it from the backend.
         if (!isset($this->objectData['calendardata'])) {
             $this->objectData = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $this->objectData['uri']);
         }
-        return $this->objectData['calendardata'];
 
+        return $this->objectData['calendardata'];
     }
 
     /**
-     * Updates the ICalendar-formatted object
+     * Updates the ICalendar-formatted object.
      *
      * @param string|resource $calendarData
+     *
      * @return string
      */
-    function put($calendarData) {
-
+    public function put($calendarData)
+    {
         if (is_resource($calendarData)) {
             $calendarData = stream_get_contents($calendarData);
         }
@@ -108,33 +109,29 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
         $this->objectData['etag'] = $etag;
 
         return $etag;
-
     }
 
     /**
-     * Deletes the calendar object
-     *
-     * @return void
+     * Deletes the calendar object.
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->caldavBackend->deleteCalendarObject($this->calendarInfo['id'], $this->objectData['uri']);
-
     }
 
     /**
-     * Returns the mime content-type
+     * Returns the mime content-type.
      *
      * @return string
      */
-    function getContentType() {
-
+    public function getContentType()
+    {
         $mime = 'text/calendar; charset=utf-8';
         if (isset($this->objectData['component']) && $this->objectData['component']) {
-            $mime .= '; component=' . $this->objectData['component'];
+            $mime .= '; component='.$this->objectData['component'];
         }
-        return $mime;
 
+        return $mime;
     }
 
     /**
@@ -144,53 +141,49 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         if (isset($this->objectData['etag'])) {
             return $this->objectData['etag'];
         } else {
-            return '"' . md5($this->get()) . '"';
+            return '"'.md5($this->get()).'"';
         }
-
     }
 
     /**
-     * Returns the last modification date as a unix timestamp
+     * Returns the last modification date as a unix timestamp.
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return $this->objectData['lastmodified'];
-
     }
 
     /**
-     * Returns the size of this object in bytes
+     * Returns the size of this object in bytes.
      *
      * @return int
      */
-    function getSize() {
-
+    public function getSize()
+    {
         if (array_key_exists('size', $this->objectData)) {
             return $this->objectData['size'];
         } else {
             return strlen($this->get());
         }
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->calendarInfo['principaluri'];
-
     }
 
     /**
@@ -205,8 +198,8 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         // An alternative acl may be specified in the object data.
         if (isset($this->objectData['acl'])) {
             return $this->objectData['acl'];
@@ -221,17 +214,14 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
             ],
             [
                 'privilege' => '{DAV:}all',
-                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
+                'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-read',
                 'protected' => true,
             ],
-
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/CalendarQueryValidator.php b/vendor/sabre/dav/lib/CalDAV/CalendarQueryValidator.php
index df8008fe2..0e7f1307d 100644
--- a/vendor/sabre/dav/lib/CalDAV/CalendarQueryValidator.php
+++ b/vendor/sabre/dav/lib/CalDAV/CalendarQueryValidator.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use DateTime;
 use Sabre\VObject;
 
 /**
- * CalendarQuery Validator
+ * CalendarQuery Validator.
  *
  * This class is responsible for checking if an iCalendar object matches a set
  * of filters. The main function to do this is 'validate'.
@@ -18,19 +20,20 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarQueryValidator {
-
+class CalendarQueryValidator
+{
     /**
-     * Verify if a list of filters applies to the calendar data object
+     * Verify if a list of filters applies to the calendar data object.
      *
      * The list of filters must be formatted as parsed by \Sabre\CalDAV\CalendarQueryParser
      *
      * @param VObject\Component\VCalendar $vObject
-     * @param array $filters
+     * @param array                       $filters
+     *
      * @return bool
      */
-    function validate(VObject\Component\VCalendar $vObject, array $filters) {
-
+    public function validate(VObject\Component\VCalendar $vObject, array $filters)
+    {
         // The top level object is always a component filter.
         // We'll parse it manually, as it's pretty simple.
         if ($vObject->name !== $filters['name']) {
@@ -40,8 +43,6 @@ class CalendarQueryValidator {
         return
             $this->validateCompFilters($vObject, $filters['comp-filters']) &&
             $this->validatePropFilters($vObject, $filters['prop-filters']);
-
-
     }
 
     /**
@@ -52,23 +53,21 @@ class CalendarQueryValidator {
      * itself.
      *
      * @param VObject\Component $parent
-     * @param array $filters
+     * @param array             $filters
+     *
      * @return bool
      */
-    protected function validateCompFilters(VObject\Component $parent, array $filters) {
-
+    protected function validateCompFilters(VObject\Component $parent, array $filters)
+    {
         foreach ($filters as $filter) {
-
             $isDefined = isset($parent->{$filter['name']});
 
             if ($filter['is-not-defined']) {
-
                 if ($isDefined) {
                     return false;
                 } else {
                     continue;
                 }
-
             }
             if (!$isDefined) {
                 return false;
@@ -80,6 +79,7 @@ class CalendarQueryValidator {
                         continue 2;
                     }
                 }
+
                 return false;
             }
 
@@ -90,27 +90,23 @@ class CalendarQueryValidator {
             // If there are sub-filters, we need to find at least one component
             // for which the subfilters hold true.
             foreach ($parent->{$filter['name']} as $subComponent) {
-
                 if (
                     $this->validateCompFilters($subComponent, $filter['comp-filters']) &&
                     $this->validatePropFilters($subComponent, $filter['prop-filters'])) {
-                        // We had a match, so this comp-filter succeeds
-                        continue 2;
+                    // We had a match, so this comp-filter succeeds
+                    continue 2;
                 }
-
             }
 
             // If we got here it means there were sub-comp-filters or
             // sub-prop-filters and there was no match. This means this filter
             // needs to return false.
             return false;
-
         }
 
         // If we got here it means we got through all comp-filters alive so the
         // filters were all true.
         return true;
-
     }
 
     /**
@@ -121,23 +117,21 @@ class CalendarQueryValidator {
      * itself.
      *
      * @param VObject\Component $parent
-     * @param array $filters
+     * @param array             $filters
+     *
      * @return bool
      */
-    protected function validatePropFilters(VObject\Component $parent, array $filters) {
-
+    protected function validatePropFilters(VObject\Component $parent, array $filters)
+    {
         foreach ($filters as $filter) {
-
             $isDefined = isset($parent->{$filter['name']});
 
             if ($filter['is-not-defined']) {
-
                 if ($isDefined) {
                     return false;
                 } else {
                     continue;
                 }
-
             }
             if (!$isDefined) {
                 return false;
@@ -149,6 +143,7 @@ class CalendarQueryValidator {
                         continue 2;
                     }
                 }
+
                 return false;
             }
 
@@ -159,7 +154,6 @@ class CalendarQueryValidator {
             // If there are sub-filters, we need to find at least one property
             // for which the subfilters hold true.
             foreach ($parent->{$filter['name']} as $subComponent) {
-
                 if (
                     $this->validateParamFilters($subComponent, $filter['param-filters']) &&
                     (!$filter['text-match'] || $this->validateTextMatch($subComponent, $filter['text-match']))
@@ -167,20 +161,17 @@ class CalendarQueryValidator {
                     // We had a match, so this prop-filter succeeds
                     continue 2;
                 }
-
             }
 
             // If we got here it means there were sub-param-filters or
             // text-match filters and there was no match. This means the
             // filter needs to return false.
             return false;
-
         }
 
         // If we got here it means we got through all prop-filters alive so the
         // filters were all true.
         return true;
-
     }
 
     /**
@@ -191,23 +182,21 @@ class CalendarQueryValidator {
      * itself.
      *
      * @param VObject\Property $parent
-     * @param array $filters
+     * @param array            $filters
+     *
      * @return bool
      */
-    protected function validateParamFilters(VObject\Property $parent, array $filters) {
-
+    protected function validateParamFilters(VObject\Property $parent, array $filters)
+    {
         foreach ($filters as $filter) {
-
             $isDefined = isset($parent[$filter['name']]);
 
             if ($filter['is-not-defined']) {
-
                 if ($isDefined) {
                     return false;
                 } else {
                     continue;
                 }
-
             }
             if (!$isDefined) {
                 return false;
@@ -220,24 +209,20 @@ class CalendarQueryValidator {
             // If there are sub-filters, we need to find at least one parameter
             // for which the subfilters hold true.
             foreach ($parent[$filter['name']]->getParts() as $paramPart) {
-
                 if ($this->validateTextMatch($paramPart, $filter['text-match'])) {
                     // We had a match, so this param-filter succeeds
                     continue 2;
                 }
-
             }
 
             // If we got here it means there was a text-match filter and there
             // were no matches. This means the filter needs to return false.
             return false;
-
         }
 
         // If we got here it means we got through all param-filters alive so the
         // filters were all true.
         return true;
-
     }
 
     /**
@@ -246,20 +231,20 @@ class CalendarQueryValidator {
      * A single text-match should be specified as well as the specific property
      * or parameter we need to validate.
      *
-     * @param VObject\Node|string $check Value to check against.
-     * @param array $textMatch
+     * @param VObject\Node|string $check     value to check against
+     * @param array               $textMatch
+     *
      * @return bool
      */
-    protected function validateTextMatch($check, array $textMatch) {
-
+    protected function validateTextMatch($check, array $textMatch)
+    {
         if ($check instanceof VObject\Node) {
             $check = $check->getValue();
         }
 
         $isMatching = \Sabre\DAV\StringUtil::textMatch($check, $textMatch['value'], $textMatch['collation']);
 
-        return ($textMatch['negate-condition'] xor $isMatching);
-
+        return $textMatch['negate-condition'] xor $isMatching;
     }
 
     /**
@@ -269,12 +254,13 @@ class CalendarQueryValidator {
      * complex.
      *
      * @param VObject\Node $component
-     * @param DateTime $start
-     * @param DateTime $end
+     * @param DateTime     $start
+     * @param DateTime     $end
+     *
      * @return bool
      */
-    protected function validateTimeRange(VObject\Node $component, $start, $end) {
-
+    protected function validateTimeRange(VObject\Node $component, $start, $end)
+    {
         if (is_null($start)) {
             $start = new DateTime('1900-01-01');
         }
@@ -283,14 +269,13 @@ class CalendarQueryValidator {
         }
 
         switch ($component->name) {
-
-            case 'VEVENT' :
-            case 'VTODO' :
-            case 'VJOURNAL' :
+            case 'VEVENT':
+            case 'VTODO':
+            case 'VJOURNAL':
 
                 return $component->isInTimeRange($start, $end);
 
-            case 'VALARM' :
+            case 'VALARM':
 
                 // If the valarm is wrapped in a recurring event, we need to
                 // expand the recursions, and validate each.
@@ -298,10 +283,9 @@ class CalendarQueryValidator {
                 // Our datamodel doesn't easily allow us to do this straight
                 // in the VALARM component code, so this is a hack, and an
                 // expensive one too.
-                if ($component->parent->name === 'VEVENT' && $component->parent->RRULE) {
-
+                if ('VEVENT' === $component->parent->name && $component->parent->RRULE) {
                     // Fire up the iterator!
-                    $it = new VObject\Recur\EventIterator($component->parent->parent, (string)$component->parent->UID);
+                    $it = new VObject\Recur\EventIterator($component->parent->parent, (string) $component->parent->UID);
                     while ($it->valid()) {
                         $expandedEvent = $it->getEventObject();
 
@@ -309,15 +293,14 @@ class CalendarQueryValidator {
                         // one is the first to trigger. Based on this, we can
                         // determine if we can 'give up' expanding events.
                         $firstAlarm = null;
-                        if ($expandedEvent->VALARM !== null) {
+                        if (null !== $expandedEvent->VALARM) {
                             foreach ($expandedEvent->VALARM as $expandedAlarm) {
-
                                 $effectiveTrigger = $expandedAlarm->getEffectiveTriggerTime();
                                 if ($expandedAlarm->isInTimeRange($start, $end)) {
                                     return true;
                                 }
 
-                                if ((string)$expandedAlarm->TRIGGER['VALUE'] === 'DATE-TIME') {
+                                if ('DATE-TIME' === (string) $expandedAlarm->TRIGGER['VALUE']) {
                                     // This is an alarm with a non-relative trigger
                                     // time, likely created by a buggy client. The
                                     // implication is that every alarm in this
@@ -346,30 +329,26 @@ class CalendarQueryValidator {
                         }
                         $it->next();
                     }
+
                     return false;
                 } else {
                     return $component->isInTimeRange($start, $end);
                 }
 
-            case 'VFREEBUSY' :
-                throw new \Sabre\DAV\Exception\NotImplemented('time-range filters are currently not supported on ' . $component->name . ' components');
-
-            case 'COMPLETED' :
-            case 'CREATED' :
-            case 'DTEND' :
-            case 'DTSTAMP' :
-            case 'DTSTART' :
-            case 'DUE' :
-            case 'LAST-MODIFIED' :
-                return ($start <= $component->getDateTime() && $end >= $component->getDateTime());
-
-
-
-            default :
-                throw new \Sabre\DAV\Exception\BadRequest('You cannot create a time-range filter on a ' . $component->name . ' component');
-
+                // no break
+            case 'VFREEBUSY':
+                throw new \Sabre\DAV\Exception\NotImplemented('time-range filters are currently not supported on '.$component->name.' components');
+            case 'COMPLETED':
+            case 'CREATED':
+            case 'DTEND':
+            case 'DTSTAMP':
+            case 'DTSTART':
+            case 'DUE':
+            case 'LAST-MODIFIED':
+                return $start <= $component->getDateTime() && $end >= $component->getDateTime();
+
+            default:
+                throw new \Sabre\DAV\Exception\BadRequest('You cannot create a time-range filter on a '.$component->name.' component');
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/CalendarRoot.php b/vendor/sabre/dav/lib/CalDAV/CalendarRoot.php
index 1d6b2ac9f..42f1a44d5 100644
--- a/vendor/sabre/dav/lib/CalDAV/CalendarRoot.php
+++ b/vendor/sabre/dav/lib/CalDAV/CalendarRoot.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAVACL\PrincipalBackend;
 
 /**
- * Calendars collection
+ * Calendars collection.
  *
  * This object is responsible for generating a list of calendar-homes for each
  * user.
@@ -17,17 +19,17 @@ use Sabre\DAVACL\PrincipalBackend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarRoot extends \Sabre\DAVACL\AbstractPrincipalCollection {
-
+class CalendarRoot extends \Sabre\DAVACL\AbstractPrincipalCollection
+{
     /**
-     * CalDAV backend
+     * CalDAV backend.
      *
      * @var Backend\BackendInterface
      */
     protected $caldavBackend;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * This constructor needs both an authentication and a caldav backend.
      *
@@ -37,28 +39,26 @@ class CalendarRoot extends \Sabre\DAVACL\AbstractPrincipalCollection {
      * to override this.
      *
      * @param PrincipalBackend\BackendInterface $principalBackend
-     * @param Backend\BackendInterface $caldavBackend
-     * @param string $principalPrefix
+     * @param Backend\BackendInterface          $caldavBackend
+     * @param string                            $principalPrefix
      */
-    function __construct(PrincipalBackend\BackendInterface $principalBackend, Backend\BackendInterface $caldavBackend, $principalPrefix = 'principals') {
-
+    public function __construct(PrincipalBackend\BackendInterface $principalBackend, Backend\BackendInterface $caldavBackend, $principalPrefix = 'principals')
+    {
         parent::__construct($principalBackend, $principalPrefix);
         $this->caldavBackend = $caldavBackend;
-
     }
 
     /**
-     * Returns the nodename
+     * Returns the nodename.
      *
      * We're overriding this, because the default will be the 'principalPrefix',
      * and we want it to be Sabre\CalDAV\Plugin::CALENDAR_ROOT
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return Plugin::CALENDAR_ROOT;
-
     }
 
     /**
@@ -69,12 +69,11 @@ class CalendarRoot extends \Sabre\DAVACL\AbstractPrincipalCollection {
      * supplied by the authentication backend.
      *
      * @param array $principal
+     *
      * @return \Sabre\DAV\INode
      */
-    function getChildForPrincipal(array $principal) {
-
+    public function getChildForPrincipal(array $principal)
+    {
         return new CalendarHome($this->caldavBackend, $principal);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Exception/InvalidComponentType.php b/vendor/sabre/dav/lib/CalDAV/Exception/InvalidComponentType.php
index 7aff2edab..3385ad8fe 100644
--- a/vendor/sabre/dav/lib/CalDAV/Exception/InvalidComponentType.php
+++ b/vendor/sabre/dav/lib/CalDAV/Exception/InvalidComponentType.php
@@ -1,35 +1,34 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Exception;
 
 use Sabre\CalDAV;
 use Sabre\DAV;
 
 /**
- * InvalidComponentType
+ * InvalidComponentType.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InvalidComponentType extends DAV\Exception\Forbidden {
-
+class InvalidComponentType extends DAV\Exception\Forbidden
+{
     /**
      * Adds in extra information in the xml response.
      *
      * This method adds the {CALDAV:}supported-calendar-component as defined in rfc4791
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $doc = $errorNode->ownerDocument;
 
         $np = $doc->createElementNS(CalDAV\Plugin::NS_CALDAV, 'cal:supported-calendar-component');
         $errorNode->appendChild($np);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php b/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php
index fc8b971f3..717d3a9c9 100644
--- a/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use DateTime;
@@ -11,7 +13,7 @@ use Sabre\HTTP\ResponseInterface;
 use Sabre\VObject;
 
 /**
- * ICS Exporter
+ * ICS Exporter.
  *
  * This plugin adds the ability to export entire calendars as .ics files.
  * This is useful for clients that don't support CalDAV yet. They often do
@@ -44,44 +46,49 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ICSExportPlugin extends DAV\ServerPlugin {
-
+class ICSExportPlugin extends DAV\ServerPlugin
+{
     /**
-     * Reference to Server class
+     * Reference to Server class.
      *
      * @var \Sabre\DAV\Server
      */
     protected $server;
 
     /**
-     * Initializes the plugin and registers event handlers
+     * Initializes the plugin and registers event handlers.
      *
      * @param \Sabre\DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
         $server->on('method:GET', [$this, 'httpGet'], 90);
-        $server->on('browserButtonActions', function($path, $node, &$actions) {
+        $server->on('browserButtonActions', function ($path, $node, &$actions) {
             if ($node instanceof ICalendar) {
-                $actions .= '<a href="' . htmlspecialchars($path, ENT_QUOTES, 'UTF-8') . '?export"><span class="oi" data-glyph="calendar"></span></a>';
+                $actions .= '<a href="'.htmlspecialchars($path, ENT_QUOTES, 'UTF-8').'?export"><span class="oi" data-glyph="calendar"></span></a>';
             }
         });
-
     }
 
     /**
      * Intercepts GET requests on calendar urls ending with ?export.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
+     * @throws BadRequest
+     * @throws DAV\Exception\NotFound
+     * @throws VObject\InvalidDataException
+     *
      * @return bool
      */
-    function httpGet(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGet(RequestInterface $request, ResponseInterface $response)
+    {
         $queryParams = $request->getQueryParameters();
-        if (!array_key_exists('export', $queryParams)) return;
+        if (!array_key_exists('export', $queryParams)) {
+            return;
+        }
 
         $path = $request->getPath();
 
@@ -93,7 +100,7 @@ class ICSExportPlugin extends DAV\ServerPlugin {
             '{http://apple.com/ns/ical/}calendar-color',
         ]);
 
-        if (!isset($node['{DAV:}resourcetype']) || !$node['{DAV:}resourcetype']->is('{' . Plugin::NS_CALDAV . '}calendar')) {
+        if (!isset($node['{DAV:}resourcetype']) || !$node['{DAV:}resourcetype']->is('{'.Plugin::NS_CALDAV.'}calendar')) {
             return;
         }
         // Marking the transactionType, for logging purposes.
@@ -117,7 +124,7 @@ class ICSExportPlugin extends DAV\ServerPlugin {
             }
             $end = DateTime::createFromFormat('U', $queryParams['end']);
         }
-        if (isset($queryParams['expand']) && !!$queryParams['expand']) {
+        if (isset($queryParams['expand']) && (bool) $queryParams['expand']) {
             if (!$start || !$end) {
                 throw new BadRequest('If you\'d like to expand recurrences, you must specify both a start= and end= parameter.');
             }
@@ -126,12 +133,12 @@ class ICSExportPlugin extends DAV\ServerPlugin {
         }
         if (isset($queryParams['componentType'])) {
             if (!in_array($queryParams['componentType'], ['VEVENT', 'VTODO', 'VJOURNAL'])) {
-                throw new BadRequest('You are not allowed to search for components of type: ' . $queryParams['componentType'] . ' here');
+                throw new BadRequest('You are not allowed to search for components of type: '.$queryParams['componentType'].' here');
             }
             $componentType = $queryParams['componentType'];
         }
 
-        $format = \Sabre\HTTP\Util::Negotiate(
+        $format = \Sabre\HTTP\negotiateContentType(
             $request->getHeader('Accept'),
             [
                 'text/calendar',
@@ -140,7 +147,7 @@ class ICSExportPlugin extends DAV\ServerPlugin {
         );
 
         if (isset($queryParams['accept'])) {
-            if ($queryParams['accept'] === 'application/calendar+json' || $queryParams['accept'] === 'jcal') {
+            if ('application/calendar+json' === $queryParams['accept'] || 'jcal' === $queryParams['accept']) {
                 $format = 'application/calendar+json';
             }
         }
@@ -152,61 +159,61 @@ class ICSExportPlugin extends DAV\ServerPlugin {
 
         // Returning false to break the event chain
         return false;
-
     }
 
     /**
      * This method is responsible for generating the actual, full response.
      *
-     * @param string $path
-     * @param DateTime|null $start
-     * @param DateTime|null $end
-     * @param bool $expand
-     * @param string $componentType
-     * @param string $format
-     * @param array $properties
+     * @param string            $path
+     * @param DateTime|null     $start
+     * @param DateTime|null     $end
+     * @param bool              $expand
+     * @param string            $componentType
+     * @param string            $format
+     * @param array             $properties
      * @param ResponseInterface $response
+     *
+     * @throws DAV\Exception\NotFound
+     * @throws VObject\InvalidDataException
      */
-    protected function generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, ResponseInterface $response) {
-
-        $calDataProp = '{' . Plugin::NS_CALDAV . '}calendar-data';
+    protected function generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, ResponseInterface $response)
+    {
+        $calDataProp = '{'.Plugin::NS_CALDAV.'}calendar-data';
         $calendarNode = $this->server->tree->getNodeForPath($path);
 
         $blobs = [];
         if ($start || $end || $componentType) {
-
             // If there was a start or end filter, we need to enlist
             // calendarQuery for speed.
             $queryResult = $calendarNode->calendarQuery([
-                'name'         => 'VCALENDAR',
+                'name' => 'VCALENDAR',
                 'comp-filters' => [
                     [
-                        'name'           => $componentType,
-                        'comp-filters'   => [],
-                        'prop-filters'   => [],
+                        'name' => $componentType,
+                        'comp-filters' => [],
+                        'prop-filters' => [],
                         'is-not-defined' => false,
-                        'time-range'     => [
+                        'time-range' => [
                             'start' => $start,
-                            'end'   => $end,
+                            'end' => $end,
                         ],
                     ],
                 ],
-                'prop-filters'   => [],
+                'prop-filters' => [],
                 'is-not-defined' => false,
-                'time-range'     => null,
+                'time-range' => null,
             ]);
 
             // queryResult is just a list of base urls. We need to prefix the
             // calendar path.
             $queryResult = array_map(
-                function($item) use ($path) {
-                    return $path . '/' . $item;
+                function ($item) use ($path) {
+                    return $path.'/'.$item;
                 },
                 $queryResult
             );
             $nodes = $this->server->getPropertiesForMultiplePaths($queryResult, [$calDataProp]);
             unset($queryResult);
-
         } else {
             $nodes = $this->server->getPropertiesForPath($path, [$calDataProp], 1);
         }
@@ -228,7 +235,7 @@ class ICSExportPlugin extends DAV\ServerPlugin {
             $calendarTimeZone = null;
             // We're expanding, and for that we need to figure out the
             // calendar's timezone.
-            $tzProp = '{' . Plugin::NS_CALDAV . '}calendar-timezone';
+            $tzProp = '{'.Plugin::NS_CALDAV.'}calendar-timezone';
             $tzResult = $this->server->getProperties($path, [$tzProp]);
             if (isset($tzResult[$tzProp])) {
                 // This property contains a VCALENDAR with a single
@@ -249,11 +256,11 @@ class ICSExportPlugin extends DAV\ServerPlugin {
         $filenameExtension = '.ics';
 
         switch ($format) {
-            case 'text/calendar' :
+            case 'text/calendar':
                 $mergedCalendar = $mergedCalendar->serialize();
                 $filenameExtension = '.ics';
                 break;
-            case 'application/calendar+json' :
+            case 'application/calendar+json':
                 $mergedCalendar = json_encode($mergedCalendar->jsonSerialize());
                 $filenameExtension = '.json';
                 break;
@@ -264,29 +271,29 @@ class ICSExportPlugin extends DAV\ServerPlugin {
             '',
             $calendarNode->getName()
         );
-        $filename .= '-' . date('Y-m-d') . $filenameExtension;
+        $filename .= '-'.date('Y-m-d').$filenameExtension;
 
-        $response->setHeader('Content-Disposition', 'attachment; filename="' . $filename . '"');
+        $response->setHeader('Content-Disposition', 'attachment; filename="'.$filename.'"');
         $response->setHeader('Content-Type', $format);
 
         $response->setStatus(200);
         $response->setBody($mergedCalendar);
-
     }
 
     /**
      * Merges all calendar objects, and builds one big iCalendar blob.
      *
-     * @param array $properties Some CalDAV properties
+     * @param array $properties   Some CalDAV properties
      * @param array $inputObjects
+     *
      * @return VObject\Component\VCalendar
      */
-    function mergeObjects(array $properties, array $inputObjects) {
-
+    public function mergeObjects(array $properties, array $inputObjects)
+    {
         $calendar = new VObject\Component\VCalendar();
         $calendar->VERSION = '2.0';
         if (DAV\Server::$exposeVersion) {
-            $calendar->PRODID = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
+            $calendar->PRODID = '-//SabreDAV//SabreDAV '.DAV\Version::VERSION.'//EN';
         } else {
             $calendar->PRODID = '-//SabreDAV//SabreDAV//EN';
         }
@@ -303,41 +310,41 @@ class ICSExportPlugin extends DAV\ServerPlugin {
         $objects = [];
 
         foreach ($inputObjects as $href => $inputObject) {
-
             $nodeComp = VObject\Reader::read($inputObject);
 
             foreach ($nodeComp->children() as $child) {
-
                 switch ($child->name) {
-                    case 'VEVENT' :
-                    case 'VTODO' :
-                    case 'VJOURNAL' :
+                    case 'VEVENT':
+                    case 'VTODO':
+                    case 'VJOURNAL':
                         $objects[] = clone $child;
                         break;
 
                     // VTIMEZONE is special, because we need to filter out the duplicates
-                    case 'VTIMEZONE' :
+                    case 'VTIMEZONE':
                         // Naively just checking tzid.
-                        if (in_array((string)$child->TZID, $collectedTimezones)) continue;
+                        if (in_array((string) $child->TZID, $collectedTimezones)) {
+                            break;
+                        }
 
                         $timezones[] = clone $child;
                         $collectedTimezones[] = $child->TZID;
                         break;
-
                 }
-
             }
             // Destroy circular references to PHP will GC the object.
             $nodeComp->destroy();
             unset($nodeComp);
-
         }
 
-        foreach ($timezones as $tz) $calendar->add($tz);
-        foreach ($objects as $obj) $calendar->add($obj);
+        foreach ($timezones as $tz) {
+            $calendar->add($tz);
+        }
+        foreach ($objects as $obj) {
+            $calendar->add($obj);
+        }
 
         return $calendar;
-
     }
 
     /**
@@ -348,10 +355,9 @@ class ICSExportPlugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'ics-export';
-
     }
 
     /**
@@ -365,14 +371,12 @@ class ICSExportPlugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds the ability to export CalDAV calendars as a single iCalendar file.',
-            'link'        => 'http://sabre.io/dav/ics-export-plugin/',
+            'link' => 'http://sabre.io/dav/ics-export-plugin/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/ICalendar.php b/vendor/sabre/dav/lib/CalDAV/ICalendar.php
index 7cf4b1256..8636e0bae 100644
--- a/vendor/sabre/dav/lib/CalDAV/ICalendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/ICalendar.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAVACL;
 
 /**
- * Calendar interface
+ * Calendar interface.
  *
  * Implement this interface to allow a node to be recognized as an calendar.
  *
@@ -13,6 +15,6 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ICalendar extends ICalendarObjectContainer, DAVACL\IACL {
-
+interface ICalendar extends ICalendarObjectContainer, DAVACL\IACL
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/ICalendarObject.php b/vendor/sabre/dav/lib/CalDAV/ICalendarObject.php
index b3a767b74..86d9be634 100644
--- a/vendor/sabre/dav/lib/CalDAV/ICalendarObject.php
+++ b/vendor/sabre/dav/lib/CalDAV/ICalendarObject.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
 
 /**
- * CalendarObject interface
+ * CalendarObject interface.
  *
  * Extend the ICalendarObject interface to allow your custom nodes to be picked up as
  * CalendarObjects.
@@ -16,6 +18,6 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ICalendarObject extends DAV\IFile {
-
+interface ICalendarObject extends DAV\IFile
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/ICalendarObjectContainer.php b/vendor/sabre/dav/lib/CalDAV/ICalendarObjectContainer.php
index 0308b8a55..d9346f311 100644
--- a/vendor/sabre/dav/lib/CalDAV/ICalendarObjectContainer.php
+++ b/vendor/sabre/dav/lib/CalDAV/ICalendarObjectContainer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 /**
@@ -15,8 +17,8 @@ namespace Sabre\CalDAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ICalendarObjectContainer extends \Sabre\DAV\ICollection {
-
+interface ICalendarObjectContainer extends \Sabre\DAV\ICollection
+{
     /**
      * Performs a calendar-query on the contents of this calendar.
      *
@@ -32,8 +34,8 @@ interface ICalendarObjectContainer extends \Sabre\DAV\ICollection {
      * documented by \Sabre\CalDAV\CalendarQueryParser.
      *
      * @param array $filters
+     *
      * @return array
      */
-    function calendarQuery(array $filters);
-
+    public function calendarQuery(array $filters);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php b/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php
index 15f3b5335..e3e9a7314 100644
--- a/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV\Sharing\ISharedNode;
@@ -11,8 +13,8 @@ use Sabre\DAV\Sharing\ISharedNode;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ISharedCalendar extends ISharedNode {
-
+interface ISharedCalendar extends ISharedNode
+{
     /**
      * Marks this calendar as published.
      *
@@ -20,7 +22,6 @@ interface ISharedCalendar extends ISharedNode {
      * subscribable calendar.
      *
      * @param bool $value
-     * @return void
      */
-    function setPublishStatus($value);
+    public function setPublishStatus($value);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php b/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php
index 557832a5a..884f205e4 100644
--- a/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php
+++ b/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Notifications;
 
 use Sabre\CalDAV;
@@ -20,49 +22,47 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
-
+class Collection extends DAV\Collection implements ICollection, DAVACL\IACL
+{
     use DAVACL\ACLTrait;
 
     /**
-     * The notification backend
+     * The notification backend.
      *
      * @var CalDAV\Backend\NotificationSupport
      */
     protected $caldavBackend;
 
     /**
-     * Principal uri
+     * Principal uri.
      *
      * @var string
      */
     protected $principalUri;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param CalDAV\Backend\NotificationSupport $caldavBackend
-     * @param string $principalUri
+     * @param string                             $principalUri
      */
-    function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri) {
-
+    public function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri)
+    {
         $this->caldavBackend = $caldavBackend;
         $this->principalUri = $principalUri;
-
     }
 
     /**
-     * Returns all notifications for a principal
+     * Returns all notifications for a principal.
      *
      * @return array
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $children = [];
         $notifications = $this->caldavBackend->getNotificationsForPrincipal($this->principalUri);
 
         foreach ($notifications as $notification) {
-
             $children[] = new Node(
                 $this->caldavBackend,
                 $this->principalUri,
@@ -71,31 +71,27 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
         }
 
         return $children;
-
     }
 
     /**
-     * Returns the name of this object
+     * Returns the name of this object.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return 'notifications';
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->principalUri;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Notifications/ICollection.php b/vendor/sabre/dav/lib/CalDAV/Notifications/ICollection.php
index 008e87435..b12fb3909 100644
--- a/vendor/sabre/dav/lib/CalDAV/Notifications/ICollection.php
+++ b/vendor/sabre/dav/lib/CalDAV/Notifications/ICollection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Notifications;
 
 use Sabre\DAV;
@@ -18,6 +20,6 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ICollection extends DAV\ICollection {
-
+interface ICollection extends DAV\ICollection
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Notifications/INode.php b/vendor/sabre/dav/lib/CalDAV/Notifications/INode.php
index 783b92be9..c5897ef4e 100644
--- a/vendor/sabre/dav/lib/CalDAV/Notifications/INode.php
+++ b/vendor/sabre/dav/lib/CalDAV/Notifications/INode.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Notifications;
 
 use Sabre\CalDAV\Xml\Notification\NotificationInterface;
@@ -18,15 +20,15 @@ use Sabre\CalDAV\Xml\Notification\NotificationInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface INode {
-
+interface INode
+{
     /**
      * This method must return an xml element, using the
      * Sabre\CalDAV\Xml\Notification\NotificationInterface classes.
      *
      * @return NotificationInterface
      */
-    function getNotificationType();
+    public function getNotificationType();
 
     /**
      * Returns the etag for the notification.
@@ -35,6 +37,5 @@ interface INode {
      *
      * @return string
      */
-    function getETag();
-
+    public function getETag();
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php b/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php
index ad7ddf8f5..b1ec13ff4 100644
--- a/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php
+++ b/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Notifications;
 
 use Sabre\CalDAV;
@@ -18,55 +20,53 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Node extends DAV\File implements INode, DAVACL\IACL {
-
+class Node extends DAV\File implements INode, DAVACL\IACL
+{
     use DAVACL\ACLTrait;
 
     /**
-     * The notification backend
+     * The notification backend.
      *
      * @var CalDAV\Backend\NotificationSupport
      */
     protected $caldavBackend;
 
     /**
-     * The actual notification
+     * The actual notification.
      *
      * @var NotificationInterface
      */
     protected $notification;
 
     /**
-     * Owner principal of the notification
+     * Owner principal of the notification.
      *
      * @var string
      */
     protected $principalUri;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param CalDAV\Backend\NotificationSupport $caldavBackend
-     * @param string $principalUri
-     * @param NotificationInterface $notification
+     * @param string                             $principalUri
+     * @param NotificationInterface              $notification
      */
-    function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri, NotificationInterface $notification) {
-
+    public function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri, NotificationInterface $notification)
+    {
         $this->caldavBackend = $caldavBackend;
         $this->principalUri = $principalUri;
         $this->notification = $notification;
-
     }
 
     /**
-     * Returns the path name for this notification
+     * Returns the path name for this notification.
      *
      * @return string
      */
-    function getName() {
-
-        return $this->notification->getId() . '.xml';
-
+    public function getName()
+    {
+        return $this->notification->getId().'.xml';
     }
 
     /**
@@ -76,10 +76,9 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return $this->notification->getETag();
-
     }
 
     /**
@@ -88,34 +87,28 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return NotificationInterface
      */
-    function getNotificationType() {
-
+    public function getNotificationType()
+    {
         return $this->notification;
-
     }
 
     /**
-     * Deletes this notification
-     *
-     * @return void
+     * Deletes this notification.
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->caldavBackend->deleteNotification($this->getOwner(), $this->notification);
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->principalUri;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Notifications/Plugin.php b/vendor/sabre/dav/lib/CalDAV/Notifications/Plugin.php
index e742351f5..182b70c8e 100644
--- a/vendor/sabre/dav/lib/CalDAV/Notifications/Plugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/Notifications/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Notifications;
 
 use Sabre\DAV;
@@ -12,7 +14,7 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * Notifications plugin
+ * Notifications plugin.
  *
  * This plugin implements several features required by the caldav-notification
  * draft specification.
@@ -24,10 +26,10 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends ServerPlugin {
-
+class Plugin extends ServerPlugin
+{
     /**
-     * This is the namespace for the proprietary calendarserver extensions
+     * This is the namespace for the proprietary calendarserver extensions.
      */
     const NS_CALENDARSERVER = 'http://calendarserver.org/ns/';
 
@@ -46,10 +48,9 @@ class Plugin extends ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'notifications';
-
     }
 
     /**
@@ -61,58 +62,49 @@ class Plugin extends ServerPlugin {
      * This method should set up the required event subscriptions.
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
+    public function initialize(Server $server)
+    {
         $this->server = $server;
         $server->on('method:GET', [$this, 'httpGet'], 90);
-        $server->on('propFind',   [$this, 'propFind']);
+        $server->on('propFind', [$this, 'propFind']);
 
         $server->xml->namespaceMap[self::NS_CALENDARSERVER] = 'cs';
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Notifications\\ICollection'] = '{' . self::NS_CALENDARSERVER . '}notification';
+        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Notifications\\ICollection'] = '{'.self::NS_CALENDARSERVER.'}notification';
 
         array_push($server->protectedProperties,
-            '{' . self::NS_CALENDARSERVER . '}notification-URL',
-            '{' . self::NS_CALENDARSERVER . '}notificationtype'
+            '{'.self::NS_CALENDARSERVER.'}notification-URL',
+            '{'.self::NS_CALENDARSERVER.'}notificationtype'
         );
-
     }
 
     /**
-     * PropFind
+     * PropFind.
      *
-     * @param PropFind $propFind
+     * @param PropFind  $propFind
      * @param BaseINode $node
-     * @return void
      */
-    function propFind(PropFind $propFind, BaseINode $node) {
-
+    public function propFind(PropFind $propFind, BaseINode $node)
+    {
         $caldavPlugin = $this->server->getPlugin('caldav');
 
         if ($node instanceof DAVACL\IPrincipal) {
-
             $principalUrl = $node->getPrincipalUrl();
 
             // notification-URL property
-            $propFind->handle('{' . self::NS_CALENDARSERVER . '}notification-URL', function() use ($principalUrl, $caldavPlugin) {
+            $propFind->handle('{'.self::NS_CALENDARSERVER.'}notification-URL', function () use ($principalUrl, $caldavPlugin) {
+                $notificationPath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl).'/notifications/';
 
-                $notificationPath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl) . '/notifications/';
                 return new DAV\Xml\Property\Href($notificationPath);
-
             });
-
         }
 
         if ($node instanceof INode) {
-
             $propFind->handle(
-                '{' . self::NS_CALENDARSERVER . '}notificationtype',
+                '{'.self::NS_CALENDARSERVER.'}notificationtype',
                 [$node, 'getNotificationType']
             );
-
         }
-
     }
 
     /**
@@ -121,12 +113,11 @@ class Plugin extends ServerPlugin {
      * We use this to intercept GET calls to notification nodes, and return the
      * proper response.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function httpGet(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGet(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         try {
@@ -135,8 +126,9 @@ class Plugin extends ServerPlugin {
             return;
         }
 
-        if (!$node instanceof INode)
+        if (!$node instanceof INode) {
             return;
+        }
 
         $writer = $this->server->xml->getWriter();
         $writer->contextUri = $this->server->getBaseUri();
@@ -153,7 +145,6 @@ class Plugin extends ServerPlugin {
 
         // Return false to break the event chain.
         return false;
-
     }
 
     /**
@@ -167,14 +158,12 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds support for caldav-notifications, which is required to enable caldav-sharing.',
-            'link'        => 'http://sabre.io/dav/caldav-sharing/',
+            'link' => 'http://sabre.io/dav/caldav-sharing/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Plugin.php b/vendor/sabre/dav/lib/CalDAV/Plugin.php
index def11d52d..04eaedf73 100644
--- a/vendor/sabre/dav/lib/CalDAV/Plugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/Plugin.php
@@ -1,8 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use DateTimeZone;
+use Sabre\CalDAV\Xml\Request\CalendarMultiGetReport;
 use Sabre\DAV;
 use Sabre\DAV\Exception\BadRequest;
 use Sabre\DAV\INode;
@@ -16,7 +19,7 @@ use Sabre\Uri;
 use Sabre\VObject;
 
 /**
- * CalDAV plugin
+ * CalDAV plugin.
  *
  * This plugin provides functionality added by CalDAV (RFC 4791)
  * It implements new reports, and the MKCALENDAR method.
@@ -25,26 +28,26 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     /**
-     * This is the official CalDAV namespace
+     * This is the official CalDAV namespace.
      */
     const NS_CALDAV = 'urn:ietf:params:xml:ns:caldav';
 
     /**
-     * This is the namespace for the proprietary calendarserver extensions
+     * This is the namespace for the proprietary calendarserver extensions.
      */
     const NS_CALENDARSERVER = 'http://calendarserver.org/ns/';
 
     /**
      * The hardcoded root for calendar objects. It is unfortunate
-     * that we're stuck with it, but it will have to do for now
+     * that we're stuck with it, but it will have to do for now.
      */
     const CALENDAR_ROOT = 'calendars';
 
     /**
-     * Reference to server object
+     * Reference to server object.
      *
      * @var DAV\Server
      */
@@ -65,14 +68,19 @@ class Plugin extends DAV\ServerPlugin {
      * available for the specified uri.
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getHTTPMethods($uri) {
-
+    public function getHTTPMethods($uri)
+    {
         // The MKCALENDAR is only available on unmapped uri's, whose
         // parents extend IExtendedCollection
         list($parent, $name) = Uri\split($uri);
 
+        if ('' === $uri) {
+            $parent = '';
+        }
+
         $node = $this->server->tree->getNodeForPath($parent);
 
         if ($node instanceof DAV\IExtendedCollection) {
@@ -82,8 +90,8 @@ class Plugin extends DAV\ServerPlugin {
                 return ['MKCALENDAR'];
             }
         }
-        return [];
 
+        return [];
     }
 
     /**
@@ -94,10 +102,11 @@ class Plugin extends DAV\ServerPlugin {
      * a calendar home.
      *
      * @param string $principalUrl
+     *
      * @return string
      */
-    function getCalendarHomeForPrincipal($principalUrl) {
-
+    public function getCalendarHomeForPrincipal($principalUrl)
+    {
         // The default behavior for most sabre/dav servers is that there is a
         // principals root node, which contains users directly under it.
         //
@@ -106,11 +115,14 @@ class Plugin extends DAV\ServerPlugin {
         // excludes things like the calendar-proxy-read principal (which it
         // should).
         $parts = explode('/', trim($principalUrl, '/'));
-        if (count($parts) !== 2) return;
-        if ($parts[0] !== 'principals') return;
-
-        return self::CALENDAR_ROOT . '/' . $parts[1];
+        if (2 !== count($parts)) {
+            return;
+        }
+        if ('principals' !== $parts[0]) {
+            return;
+        }
 
+        return self::CALENDAR_ROOT.'/'.$parts[1];
     }
 
     /**
@@ -118,10 +130,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['calendar-access', 'calendar-proxy'];
-
     }
 
     /**
@@ -132,10 +143,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'caldav';
-
     }
 
     /**
@@ -146,19 +156,20 @@ class Plugin extends DAV\ServerPlugin {
      * implement them
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getSupportedReportSet($uri) {
-
+    public function getSupportedReportSet($uri)
+    {
         $node = $this->server->tree->getNodeForPath($uri);
 
         $reports = [];
         if ($node instanceof ICalendarObjectContainer || $node instanceof ICalendarObject) {
-            $reports[] = '{' . self::NS_CALDAV . '}calendar-multiget';
-            $reports[] = '{' . self::NS_CALDAV . '}calendar-query';
+            $reports[] = '{'.self::NS_CALDAV.'}calendar-multiget';
+            $reports[] = '{'.self::NS_CALDAV.'}calendar-query';
         }
         if ($node instanceof ICalendar) {
-            $reports[] = '{' . self::NS_CALDAV . '}free-busy-query';
+            $reports[] = '{'.self::NS_CALDAV.'}free-busy-query';
         }
         // iCal has a bug where it assumes that sync support is enabled, only
         // if we say we support it on the calendar-home, even though this is
@@ -166,39 +177,38 @@ class Plugin extends DAV\ServerPlugin {
         if ($node instanceof CalendarHome && $this->server->getPlugin('sync')) {
             $reports[] = '{DAV:}sync-collection';
         }
-        return $reports;
 
+        return $reports;
     }
 
     /**
-     * Initializes the plugin
+     * Initializes the plugin.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
 
-        $server->on('method:MKCALENDAR',   [$this, 'httpMkCalendar']);
-        $server->on('report',              [$this, 'report']);
-        $server->on('propFind',            [$this, 'propFind']);
-        $server->on('onHTMLActionsPanel',  [$this, 'htmlActionsPanel']);
-        $server->on('beforeCreateFile',    [$this, 'beforeCreateFile']);
-        $server->on('beforeWriteContent',  [$this, 'beforeWriteContent']);
-        $server->on('afterMethod:GET',     [$this, 'httpAfterGET']);
+        $server->on('method:MKCALENDAR', [$this, 'httpMkCalendar']);
+        $server->on('report', [$this, 'report']);
+        $server->on('propFind', [$this, 'propFind']);
+        $server->on('onHTMLActionsPanel', [$this, 'htmlActionsPanel']);
+        $server->on('beforeCreateFile', [$this, 'beforeCreateFile']);
+        $server->on('beforeWriteContent', [$this, 'beforeWriteContent']);
+        $server->on('afterMethod:GET', [$this, 'httpAfterGET']);
         $server->on('getSupportedPrivilegeSet', [$this, 'getSupportedPrivilegeSet']);
 
         $server->xml->namespaceMap[self::NS_CALDAV] = 'cal';
         $server->xml->namespaceMap[self::NS_CALENDARSERVER] = 'cs';
 
-        $server->xml->elementMap['{' . self::NS_CALDAV . '}supported-calendar-component-set'] = 'Sabre\\CalDAV\\Xml\\Property\\SupportedCalendarComponentSet';
-        $server->xml->elementMap['{' . self::NS_CALDAV . '}calendar-query'] = 'Sabre\\CalDAV\\Xml\\Request\\CalendarQueryReport';
-        $server->xml->elementMap['{' . self::NS_CALDAV . '}calendar-multiget'] = 'Sabre\\CalDAV\\Xml\\Request\\CalendarMultiGetReport';
-        $server->xml->elementMap['{' . self::NS_CALDAV . '}free-busy-query'] = 'Sabre\\CalDAV\\Xml\\Request\\FreeBusyQueryReport';
-        $server->xml->elementMap['{' . self::NS_CALDAV . '}mkcalendar'] = 'Sabre\\CalDAV\\Xml\\Request\\MkCalendar';
-        $server->xml->elementMap['{' . self::NS_CALDAV . '}schedule-calendar-transp'] = 'Sabre\\CalDAV\\Xml\\Property\\ScheduleCalendarTransp';
-        $server->xml->elementMap['{' . self::NS_CALDAV . '}supported-calendar-component-set'] = 'Sabre\\CalDAV\\Xml\\Property\\SupportedCalendarComponentSet';
+        $server->xml->elementMap['{'.self::NS_CALDAV.'}supported-calendar-component-set'] = 'Sabre\\CalDAV\\Xml\\Property\\SupportedCalendarComponentSet';
+        $server->xml->elementMap['{'.self::NS_CALDAV.'}calendar-query'] = 'Sabre\\CalDAV\\Xml\\Request\\CalendarQueryReport';
+        $server->xml->elementMap['{'.self::NS_CALDAV.'}calendar-multiget'] = 'Sabre\\CalDAV\\Xml\\Request\\CalendarMultiGetReport';
+        $server->xml->elementMap['{'.self::NS_CALDAV.'}free-busy-query'] = 'Sabre\\CalDAV\\Xml\\Request\\FreeBusyQueryReport';
+        $server->xml->elementMap['{'.self::NS_CALDAV.'}mkcalendar'] = 'Sabre\\CalDAV\\Xml\\Request\\MkCalendar';
+        $server->xml->elementMap['{'.self::NS_CALDAV.'}schedule-calendar-transp'] = 'Sabre\\CalDAV\\Xml\\Property\\ScheduleCalendarTransp';
+        $server->xml->elementMap['{'.self::NS_CALDAV.'}supported-calendar-component-set'] = 'Sabre\\CalDAV\\Xml\\Property\\SupportedCalendarComponentSet';
 
         $server->resourceTypeMapping['\\Sabre\\CalDAV\\ICalendar'] = '{urn:ietf:params:xml:ns:caldav}calendar';
 
@@ -206,86 +216,84 @@ class Plugin extends DAV\ServerPlugin {
         $server->resourceTypeMapping['\\Sabre\\CalDAV\\Principal\\IProxyWrite'] = '{http://calendarserver.org/ns/}calendar-proxy-write';
 
         array_push($server->protectedProperties,
-
-            '{' . self::NS_CALDAV . '}supported-calendar-component-set',
-            '{' . self::NS_CALDAV . '}supported-calendar-data',
-            '{' . self::NS_CALDAV . '}max-resource-size',
-            '{' . self::NS_CALDAV . '}min-date-time',
-            '{' . self::NS_CALDAV . '}max-date-time',
-            '{' . self::NS_CALDAV . '}max-instances',
-            '{' . self::NS_CALDAV . '}max-attendees-per-instance',
-            '{' . self::NS_CALDAV . '}calendar-home-set',
-            '{' . self::NS_CALDAV . '}supported-collation-set',
-            '{' . self::NS_CALDAV . '}calendar-data',
+            '{'.self::NS_CALDAV.'}supported-calendar-component-set',
+            '{'.self::NS_CALDAV.'}supported-calendar-data',
+            '{'.self::NS_CALDAV.'}max-resource-size',
+            '{'.self::NS_CALDAV.'}min-date-time',
+            '{'.self::NS_CALDAV.'}max-date-time',
+            '{'.self::NS_CALDAV.'}max-instances',
+            '{'.self::NS_CALDAV.'}max-attendees-per-instance',
+            '{'.self::NS_CALDAV.'}calendar-home-set',
+            '{'.self::NS_CALDAV.'}supported-collation-set',
+            '{'.self::NS_CALDAV.'}calendar-data',
 
             // CalendarServer extensions
-            '{' . self::NS_CALENDARSERVER . '}getctag',
-            '{' . self::NS_CALENDARSERVER . '}calendar-proxy-read-for',
-            '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for'
-
+            '{'.self::NS_CALENDARSERVER.'}getctag',
+            '{'.self::NS_CALENDARSERVER.'}calendar-proxy-read-for',
+            '{'.self::NS_CALENDARSERVER.'}calendar-proxy-write-for'
         );
 
         if ($aclPlugin = $server->getPlugin('acl')) {
-            $aclPlugin->principalSearchPropertySet['{' . self::NS_CALDAV . '}calendar-user-address-set'] = 'Calendar address';
+            $aclPlugin->principalSearchPropertySet['{'.self::NS_CALDAV.'}calendar-user-address-set'] = 'Calendar address';
         }
     }
 
     /**
-     * This functions handles REPORT requests specific to CalDAV
+     * This functions handles REPORT requests specific to CalDAV.
      *
      * @param string $reportName
-     * @param mixed $report
-     * @param mixed $path
+     * @param mixed  $report
+     * @param mixed  $path
+     *
      * @return bool
      */
-    function report($reportName, $report, $path) {
-
+    public function report($reportName, $report, $path)
+    {
         switch ($reportName) {
-            case '{' . self::NS_CALDAV . '}calendar-multiget' :
+            case '{'.self::NS_CALDAV.'}calendar-multiget':
                 $this->server->transactionType = 'report-calendar-multiget';
                 $this->calendarMultiGetReport($report);
+
                 return false;
-            case '{' . self::NS_CALDAV . '}calendar-query' :
+            case '{'.self::NS_CALDAV.'}calendar-query':
                 $this->server->transactionType = 'report-calendar-query';
                 $this->calendarQueryReport($report);
+
                 return false;
-            case '{' . self::NS_CALDAV . '}free-busy-query' :
+            case '{'.self::NS_CALDAV.'}free-busy-query':
                 $this->server->transactionType = 'report-free-busy-query';
                 $this->freeBusyQueryReport($report);
-                return false;
 
+                return false;
         }
-
-
     }
 
     /**
      * This function handles the MKCALENDAR HTTP method, which creates
      * a new calendar.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpMkCalendar(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpMkCalendar(RequestInterface $request, ResponseInterface $response)
+    {
         $body = $request->getBodyAsString();
         $path = $request->getPath();
 
         $properties = [];
 
         if ($body) {
-
             try {
                 $mkcalendar = $this->server->xml->expect(
                     '{urn:ietf:params:xml:ns:caldav}mkcalendar',
                     $body
                 );
             } catch (\Sabre\Xml\ParseException $e) {
-                throw new BadRequest($e->getMessage(), null, $e);
+                throw new BadRequest($e->getMessage(), 0, $e);
             }
             $properties = $mkcalendar->getProperties();
-
         }
 
         // iCal abuses MKCALENDAR since iCal 10.9.2 to create server-stored
@@ -297,7 +305,7 @@ class Plugin extends DAV\ServerPlugin {
         if (isset($properties['{DAV:}resourcetype'])) {
             $resourceType = $properties['{DAV:}resourcetype']->getValue();
         } else {
-            $resourceType = ['{DAV:}collection','{urn:ietf:params:xml:ns:caldav}calendar'];
+            $resourceType = ['{DAV:}collection', '{urn:ietf:params:xml:ns:caldav}calendar'];
         }
 
         $this->server->createCollection($path, new MkCol($resourceType, $properties));
@@ -310,80 +318,77 @@ class Plugin extends DAV\ServerPlugin {
     }
 
     /**
-     * PropFind
+     * PropFind.
      *
      * This method handler is invoked before any after properties for a
      * resource are fetched. This allows us to add in any CalDAV specific
      * properties.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
-     * @return void
+     * @param DAV\INode    $node
      */
-    function propFind(DAV\PropFind $propFind, DAV\INode $node) {
-
-        $ns = '{' . self::NS_CALDAV . '}';
+    public function propFind(DAV\PropFind $propFind, DAV\INode $node)
+    {
+        $ns = '{'.self::NS_CALDAV.'}';
 
         if ($node instanceof ICalendarObjectContainer) {
-
-            $propFind->handle($ns . 'max-resource-size', $this->maxResourceSize);
-            $propFind->handle($ns . 'supported-calendar-data', function() {
+            $propFind->handle($ns.'max-resource-size', $this->maxResourceSize);
+            $propFind->handle($ns.'supported-calendar-data', function () {
                 return new Xml\Property\SupportedCalendarData();
             });
-            $propFind->handle($ns . 'supported-collation-set', function() {
+            $propFind->handle($ns.'supported-collation-set', function () {
                 return new Xml\Property\SupportedCollationSet();
             });
-
         }
 
         if ($node instanceof DAVACL\IPrincipal) {
-
             $principalUrl = $node->getPrincipalUrl();
 
-            $propFind->handle('{' . self::NS_CALDAV . '}calendar-home-set', function() use ($principalUrl) {
-
+            $propFind->handle('{'.self::NS_CALDAV.'}calendar-home-set', function () use ($principalUrl) {
                 $calendarHomePath = $this->getCalendarHomeForPrincipal($principalUrl);
-                if (is_null($calendarHomePath)) return null;
-                return new LocalHref($calendarHomePath . '/');
+                if (is_null($calendarHomePath)) {
+                    return null;
+                }
 
+                return new LocalHref($calendarHomePath.'/');
             });
             // The calendar-user-address-set property is basically mapped to
             // the {DAV:}alternate-URI-set property.
-            $propFind->handle('{' . self::NS_CALDAV . '}calendar-user-address-set', function() use ($node) {
+            $propFind->handle('{'.self::NS_CALDAV.'}calendar-user-address-set', function () use ($node) {
                 $addresses = $node->getAlternateUriSet();
-                $addresses[] = $this->server->getBaseUri() . $node->getPrincipalUrl() . '/';
+                $addresses[] = $this->server->getBaseUri().$node->getPrincipalUrl().'/';
+
                 return new LocalHref($addresses);
             });
             // For some reason somebody thought it was a good idea to add
             // another one of these properties. We're supporting it too.
-            $propFind->handle('{' . self::NS_CALENDARSERVER . '}email-address-set', function() use ($node) {
+            $propFind->handle('{'.self::NS_CALENDARSERVER.'}email-address-set', function () use ($node) {
                 $addresses = $node->getAlternateUriSet();
                 $emails = [];
                 foreach ($addresses as $address) {
-                    if (substr($address, 0, 7) === 'mailto:') {
+                    if ('mailto:' === substr($address, 0, 7)) {
                         $emails[] = substr($address, 7);
                     }
                 }
+
                 return new Xml\Property\EmailAddressSet($emails);
             });
 
             // These two properties are shortcuts for ical to easily find
             // other principals this principal has access to.
-            $propRead = '{' . self::NS_CALENDARSERVER . '}calendar-proxy-read-for';
-            $propWrite = '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for';
-
-            if ($propFind->getStatus($propRead) === 404 || $propFind->getStatus($propWrite) === 404) {
+            $propRead = '{'.self::NS_CALENDARSERVER.'}calendar-proxy-read-for';
+            $propWrite = '{'.self::NS_CALENDARSERVER.'}calendar-proxy-write-for';
 
+            if (404 === $propFind->getStatus($propRead) || 404 === $propFind->getStatus($propWrite)) {
                 $aclPlugin = $this->server->getPlugin('acl');
                 $membership = $aclPlugin->getPrincipalMembership($propFind->getPath());
                 $readList = [];
                 $writeList = [];
 
                 foreach ($membership as $group) {
-
                     $groupNode = $this->server->tree->getNodeForPath($group);
 
-                    $listItem = Uri\split($group)[0] . '/';
+                    $listItem = Uri\split($group)[0].'/';
 
                     // If the node is either ap proxy-read or proxy-write
                     // group, we grab the parent principal and add it to the
@@ -394,33 +399,27 @@ class Plugin extends DAV\ServerPlugin {
                     if ($groupNode instanceof Principal\IProxyWrite) {
                         $writeList[] = $listItem;
                     }
-
                 }
 
                 $propFind->set($propRead, new LocalHref($readList));
                 $propFind->set($propWrite, new LocalHref($writeList));
-
             }
-
         } // instanceof IPrincipal
 
         if ($node instanceof ICalendarObject) {
-
             // The calendar-data property is not supposed to be a 'real'
             // property, but in large chunks of the spec it does act as such.
             // Therefore we simply expose it as a property.
-            $propFind->handle('{' . self::NS_CALDAV . '}calendar-data', function() use ($node) {
+            $propFind->handle('{'.self::NS_CALDAV.'}calendar-data', function () use ($node) {
                 $val = $node->get();
-                if (is_resource($val))
+                if (is_resource($val)) {
                     $val = stream_get_contents($val);
+                }
 
                 // Taking out \r to not screw up the xml output
-                return str_replace("\r", "", $val);
-
+                return str_replace("\r", '', $val);
             });
-
         }
-
     }
 
     /**
@@ -430,11 +429,10 @@ class Plugin extends DAV\ServerPlugin {
      * of urls. Effectively avoiding a lot of redundant requests.
      *
      * @param CalendarMultiGetReport $report
-     * @return void
      */
-    function calendarMultiGetReport($report) {
-
-        $needsJson = $report->contentType === 'application/calendar+json';
+    public function calendarMultiGetReport($report)
+    {
+        $needsJson = 'application/calendar+json' === $report->contentType;
 
         $timeZones = [];
         $propertyList = [];
@@ -445,9 +443,8 @@ class Plugin extends DAV\ServerPlugin {
         );
 
         foreach ($this->server->getPropertiesForMultiplePaths($paths, $report->properties) as $uri => $objProps) {
-
-            if (($needsJson || $report->expand) && isset($objProps[200]['{' . self::NS_CALDAV . '}calendar-data'])) {
-                $vObject = VObject\Reader::read($objProps[200]['{' . self::NS_CALDAV . '}calendar-data']);
+            if (($needsJson || $report->expand) && isset($objProps[200]['{'.self::NS_CALDAV.'}calendar-data'])) {
+                $vObject = VObject\Reader::read($objProps[200]['{'.self::NS_CALDAV.'}calendar-data']);
 
                 if ($report->expand) {
                     // We're expanding, and for that we need to figure out the
@@ -455,7 +452,7 @@ class Plugin extends DAV\ServerPlugin {
                     list($calendarPath) = Uri\split($uri);
                     if (!isset($timeZones[$calendarPath])) {
                         // Checking the calendar-timezone property.
-                        $tzProp = '{' . self::NS_CALDAV . '}calendar-timezone';
+                        $tzProp = '{'.self::NS_CALDAV.'}calendar-timezone';
                         $tzResult = $this->server->getProperties($calendarPath, [$tzProp]);
                         if (isset($tzResult[$tzProp])) {
                             // This property contains a VCALENDAR with a single
@@ -472,9 +469,9 @@ class Plugin extends DAV\ServerPlugin {
                     $vObject = $vObject->expand($report->expand['start'], $report->expand['end'], $timeZones[$calendarPath]);
                 }
                 if ($needsJson) {
-                    $objProps[200]['{' . self::NS_CALDAV . '}calendar-data'] = json_encode($vObject->jsonSerialize());
+                    $objProps[200]['{'.self::NS_CALDAV.'}calendar-data'] = json_encode($vObject->jsonSerialize());
                 } else {
-                    $objProps[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
+                    $objProps[200]['{'.self::NS_CALDAV.'}calendar-data'] = $vObject->serialize();
                 }
                 // Destroy circular references so PHP will garbage collect the
                 // object.
@@ -482,7 +479,6 @@ class Plugin extends DAV\ServerPlugin {
             }
 
             $propertyList[] = $objProps;
-
         }
 
         $prefer = $this->server->getHTTPPrefer();
@@ -490,24 +486,22 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setStatus(207);
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setHeader('Vary', 'Brief,Prefer');
-        $this->server->httpResponse->setBody($this->server->generateMultiStatus($propertyList, $prefer['return'] === 'minimal'));
-
+        $this->server->httpResponse->setBody($this->server->generateMultiStatus($propertyList, 'minimal' === $prefer['return']));
     }
 
     /**
-     * This function handles the calendar-query REPORT
+     * This function handles the calendar-query REPORT.
      *
      * This report is used by clients to request calendar objects based on
      * complex conditions.
      *
      * @param Xml\Request\CalendarQueryReport $report
-     * @return void
      */
-    function calendarQueryReport($report) {
-
+    public function calendarQueryReport($report)
+    {
         $path = $this->server->getRequestUri();
 
-        $needsJson = $report->contentType === 'application/calendar+json';
+        $needsJson = 'application/calendar+json' === $report->contentType;
 
         $node = $this->server->tree->getNodeForPath($this->server->getRequestUri());
         $depth = $this->server->getHTTPDepth(0);
@@ -519,7 +513,7 @@ class Plugin extends DAV\ServerPlugin {
         if ($report->expand) {
             // We're expanding, and for that we need to figure out the
             // calendar's timezone.
-            $tzProp = '{' . self::NS_CALDAV . '}calendar-timezone';
+            $tzProp = '{'.self::NS_CALDAV.'}calendar-timezone';
             $tzResult = $this->server->getProperties($path, [$tzProp]);
             if (isset($tzResult[$tzProp])) {
                 // This property contains a VCALENDAR with a single
@@ -538,13 +532,11 @@ class Plugin extends DAV\ServerPlugin {
 
         // The calendarobject was requested directly. In this case we handle
         // this locally.
-        if ($depth == 0 && $node instanceof ICalendarObject) {
-
+        if (0 == $depth && $node instanceof ICalendarObject) {
             $requestedCalendarData = true;
             $requestedProperties = $report->properties;
 
             if (!in_array('{urn:ietf:params:xml:ns:caldav}calendar-data', $requestedProperties)) {
-
                 // We always retrieve calendar-data, as we need it for filtering.
                 $requestedProperties[] = '{urn:ietf:params:xml:ns:caldav}calendar-data';
 
@@ -566,43 +558,35 @@ class Plugin extends DAV\ServerPlugin {
             // If there wasn't any calendar-data returned somehow, we ignore
             // this.
             if (isset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data'])) {
-
                 $validator = new CalendarQueryValidator();
 
                 $vObject = VObject\Reader::read($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
                 if ($validator->validate($vObject, $report->filters)) {
-
                     // If the client didn't require the calendar-data property,
                     // we won't give it back.
                     if (!$requestedCalendarData) {
                         unset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
                     } else {
-
-
                         if ($report->expand) {
                             $vObject = $vObject->expand($report->expand['start'], $report->expand['end'], $calendarTimeZone);
                         }
                         if ($needsJson) {
-                            $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = json_encode($vObject->jsonSerialize());
+                            $properties[200]['{'.self::NS_CALDAV.'}calendar-data'] = json_encode($vObject->jsonSerialize());
                         } elseif ($report->expand) {
-                            $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
+                            $properties[200]['{'.self::NS_CALDAV.'}calendar-data'] = $vObject->serialize();
                         }
                     }
 
                     $result = [$properties];
-
                 }
                 // Destroy circular references so PHP will garbage collect the
                 // object.
                 $vObject->destroy();
-
             }
-
         }
 
-        if ($node instanceof ICalendarObjectContainer && $depth === 0) {
-
-            if (strpos($this->server->httpRequest->getHeader('User-Agent'), 'MSFT-') === 0) {
+        if ($node instanceof ICalendarObjectContainer && 0 === $depth) {
+            if (0 === strpos((string) $this->server->httpRequest->getHeader('User-Agent'), 'MSFT-')) {
                 // Microsoft clients incorrectly supplied depth as 0, when it actually
                 // should have set depth to 1. We're implementing a workaround here
                 // to deal with this.
@@ -614,31 +598,28 @@ class Plugin extends DAV\ServerPlugin {
             } else {
                 throw new BadRequest('A calendar-query REPORT on a calendar with a Depth: 0 is undefined. Set Depth to 1');
             }
-
         }
 
         // If we're dealing with a calendar, the calendar itself is responsible
         // for the calendar-query.
-        if ($node instanceof ICalendarObjectContainer && $depth == 1) {
-
+        if ($node instanceof ICalendarObjectContainer && 1 == $depth) {
             $nodePaths = $node->calendarQuery($report->filters);
 
             foreach ($nodePaths as $path) {
-
                 list($properties) =
-                    $this->server->getPropertiesForPath($this->server->getRequestUri() . '/' . $path, $report->properties);
+                    $this->server->getPropertiesForPath($this->server->getRequestUri().'/'.$path, $report->properties);
 
                 if (($needsJson || $report->expand)) {
-                    $vObject = VObject\Reader::read($properties[200]['{' . self::NS_CALDAV . '}calendar-data']);
+                    $vObject = VObject\Reader::read($properties[200]['{'.self::NS_CALDAV.'}calendar-data']);
 
                     if ($report->expand) {
                         $vObject = $vObject->expand($report->expand['start'], $report->expand['end'], $calendarTimeZone);
                     }
 
                     if ($needsJson) {
-                        $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = json_encode($vObject->jsonSerialize());
+                        $properties[200]['{'.self::NS_CALDAV.'}calendar-data'] = json_encode($vObject->jsonSerialize());
                     } else {
-                        $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
+                        $properties[200]['{'.self::NS_CALDAV.'}calendar-data'] = $vObject->serialize();
                     }
 
                     // Destroy circular references so PHP will garbage collect the
@@ -646,9 +627,7 @@ class Plugin extends DAV\ServerPlugin {
                     $vObject->destroy();
                 }
                 $result[] = $properties;
-
             }
-
         }
 
         $prefer = $this->server->getHTTPPrefer();
@@ -656,8 +635,7 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setStatus(207);
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setHeader('Vary', 'Brief,Prefer');
-        $this->server->httpResponse->setBody($this->server->generateMultiStatus($result, $prefer['return'] === 'minimal'));
-
+        $this->server->httpResponse->setBody($this->server->generateMultiStatus($result, 'minimal' === $prefer['return']));
     }
 
     /**
@@ -665,15 +643,14 @@ class Plugin extends DAV\ServerPlugin {
      * response for the CALDAV:free-busy-query REPORT.
      *
      * @param Xml\Request\FreeBusyQueryReport $report
-     * @return void
      */
-    protected function freeBusyQueryReport(Xml\Request\FreeBusyQueryReport $report) {
-
+    protected function freeBusyQueryReport(Xml\Request\FreeBusyQueryReport $report)
+    {
         $uri = $this->server->getRequestUri();
 
         $acl = $this->server->getPlugin('acl');
         if ($acl) {
-            $acl->checkPrivileges($uri, '{' . self::NS_CALDAV . '}read-free-busy');
+            $acl->checkPrivileges($uri, '{'.self::NS_CALDAV.'}read-free-busy');
         }
 
         $calendar = $this->server->tree->getNodeForPath($uri);
@@ -681,7 +658,7 @@ class Plugin extends DAV\ServerPlugin {
             throw new DAV\Exception\NotImplemented('The free-busy-query REPORT is only implemented on calendars');
         }
 
-        $tzProp = '{' . self::NS_CALDAV . '}calendar-timezone';
+        $tzProp = '{'.self::NS_CALDAV.'}calendar-timezone';
 
         // Figuring out the default timezone for the calendar, for floating
         // times.
@@ -699,26 +676,27 @@ class Plugin extends DAV\ServerPlugin {
         // Doing a calendar-query first, to make sure we get the most
         // performance.
         $urls = $calendar->calendarQuery([
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => $report->start,
-                        'end'   => $report->end,
+                        'end' => $report->end,
                     ],
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ]);
 
-        $objects = array_map(function($url) use ($calendar) {
+        $objects = array_map(function ($url) use ($calendar) {
             $obj = $calendar->getChild($url)->get();
+
             return $obj;
         }, $urls);
 
@@ -733,7 +711,6 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setHeader('Content-Type', 'text/calendar');
         $this->server->httpResponse->setHeader('Content-Length', strlen($result));
         $this->server->httpResponse->setBody($result);
-
     }
 
     /**
@@ -742,17 +719,17 @@ class Plugin extends DAV\ServerPlugin {
      * This plugin uses this method to ensure that CalDAV objects receive
      * valid calendar data.
      *
-     * @param string $path
+     * @param string    $path
      * @param DAV\IFile $node
-     * @param resource $data
-     * @param bool $modified Should be set to true, if this event handler
-     *                       changed &$data.
-     * @return void
+     * @param resource  $data
+     * @param bool      $modified should be set to true, if this event handler
+     *                            changed &$data
      */
-    function beforeWriteContent($path, DAV\IFile $node, &$data, &$modified) {
-
-        if (!$node instanceof ICalendarObject)
+    public function beforeWriteContent($path, DAV\IFile $node, &$data, &$modified)
+    {
+        if (!$node instanceof ICalendarObject) {
             return;
+        }
 
         // We're onyl interested in ICalendarObject nodes that are inside of a
         // real calendar. This is to avoid triggering validation and scheduling
@@ -760,8 +737,9 @@ class Plugin extends DAV\ServerPlugin {
         list($parent) = Uri\split($path);
         $parentNode = $this->server->tree->getNodeForPath($parent);
 
-        if (!$parentNode instanceof ICalendar)
+        if (!$parentNode instanceof ICalendar) {
             return;
+        }
 
         $this->validateICalendar(
             $data,
@@ -771,7 +749,6 @@ class Plugin extends DAV\ServerPlugin {
             $this->server->httpResponse,
             false
         );
-
     }
 
     /**
@@ -780,17 +757,17 @@ class Plugin extends DAV\ServerPlugin {
      * This plugin uses this method to ensure that newly created calendar
      * objects contain valid calendar data.
      *
-     * @param string $path
-     * @param resource $data
+     * @param string          $path
+     * @param resource        $data
      * @param DAV\ICollection $parentNode
-     * @param bool $modified Should be set to true, if this event handler
-     *                       changed &$data.
-     * @return void
+     * @param bool            $modified   should be set to true, if this event handler
+     *                                    changed &$data
      */
-    function beforeCreateFile($path, &$data, DAV\ICollection $parentNode, &$modified) {
-
-        if (!$parentNode instanceof ICalendar)
+    public function beforeCreateFile($path, &$data, DAV\ICollection $parentNode, &$modified)
+    {
+        if (!$parentNode instanceof ICalendar) {
             return;
+        }
 
         $this->validateICalendar(
             $data,
@@ -800,7 +777,6 @@ class Plugin extends DAV\ServerPlugin {
             $this->server->httpResponse,
             true
         );
-
     }
 
     /**
@@ -808,17 +784,16 @@ class Plugin extends DAV\ServerPlugin {
      *
      * An exception is thrown if it's not.
      *
-     * @param resource|string $data
-     * @param string $path
-     * @param bool $modified Should be set to true, if this event handler
-     *                       changed &$data.
-     * @param RequestInterface $request The http request.
-     * @param ResponseInterface $response The http response.
-     * @param bool $isNew Is the item a new one, or an update.
-     * @return void
+     * @param resource|string   $data
+     * @param string            $path
+     * @param bool              $modified should be set to true, if this event handler
+     *                                    changed &$data
+     * @param RequestInterface  $request  the http request
+     * @param ResponseInterface $response the http response
+     * @param bool              $isNew    is the item a new one, or an update
      */
-    protected function validateICalendar(&$data, $path, &$modified, RequestInterface $request, ResponseInterface $response, $isNew) {
-
+    protected function validateICalendar(&$data, $path, &$modified, RequestInterface $request, ResponseInterface $response, $isNew)
+    {
         // If it's a stream, we convert it to a string first.
         if (is_resource($data)) {
             $data = stream_get_contents($data);
@@ -827,10 +802,9 @@ class Plugin extends DAV\ServerPlugin {
         $before = $data;
 
         try {
-
             // If the data starts with a [, we can reasonably assume we're dealing
             // with a jCal object.
-            if (substr($data, 0, 1) === '[') {
+            if ('[' === substr($data, 0, 1)) {
                 $vobj = VObject\Reader::readJson($data);
 
                 // Converting $data back to iCalendar, as that's what we
@@ -840,14 +814,11 @@ class Plugin extends DAV\ServerPlugin {
             } else {
                 $vobj = VObject\Reader::read($data);
             }
-
         } catch (VObject\ParseException $e) {
-
-            throw new DAV\Exception\UnsupportedMediaType('This resource only supports valid iCalendar 2.0 data. Parse error: ' . $e->getMessage());
-
+            throw new DAV\Exception\UnsupportedMediaType('This resource only supports valid iCalendar 2.0 data. Parse error: '.$e->getMessage());
         }
 
-        if ($vobj->name !== 'VCALENDAR') {
+        if ('VCALENDAR' !== $vobj->name) {
             throw new DAV\Exception\UnsupportedMediaType('This collection can only support iCalendar objects.');
         }
 
@@ -867,25 +838,24 @@ class Plugin extends DAV\ServerPlugin {
 
         foreach ($vobj->getComponents() as $component) {
             switch ($component->name) {
-                case 'VTIMEZONE' :
+                case 'VTIMEZONE':
                     continue 2;
-                case 'VEVENT' :
-                case 'VTODO' :
-                case 'VJOURNAL' :
+                case 'VEVENT':
+                case 'VTODO':
+                case 'VJOURNAL':
                     $foundType = $component->name;
                     break;
             }
-
         }
 
         if (!$foundType || !in_array($foundType, $supportedComponents)) {
-            throw new Exception\InvalidComponentType('iCalendar objects must at least have a component of type ' . implode(', ', $supportedComponents));
+            throw new Exception\InvalidComponentType('iCalendar objects must at least have a component of type '.implode(', ', $supportedComponents));
         }
 
         $options = VObject\Node::PROFILE_CALDAV;
         $prefer = $this->server->getHTTPPrefer();
 
-        if ($prefer['handling'] !== 'strict') {
+        if ('strict' !== $prefer['handling']) {
             $options |= VObject\Node::REPAIR;
         }
 
@@ -897,32 +867,28 @@ class Plugin extends DAV\ServerPlugin {
         // $messages contains a list of problems with the vcard, along with
         // their severity.
         foreach ($messages as $message) {
-
             if ($message['level'] > $highestLevel) {
                 // Recording the highest reported error level.
                 $highestLevel = $message['level'];
                 $warningMessage = $message['message'];
             }
             switch ($message['level']) {
-
-                case 1 :
+                case 1:
                     // Level 1 means that there was a problem, but it was repaired.
                     $modified = true;
                     break;
-                case 2 :
+                case 2:
                     // Level 2 means a warning, but not critical
                     break;
-                case 3 :
+                case 3:
                     // Level 3 means a critical error
-                    throw new DAV\Exception\UnsupportedMediaType('Validation error in iCalendar: ' . $message['message']);
-
+                    throw new DAV\Exception\UnsupportedMediaType('Validation error in iCalendar: '.$message['message']);
             }
-
         }
         if ($warningMessage) {
             $response->setHeader(
                 'X-Sabre-Ew-Gross',
-                'iCalendar validation warning: ' . $warningMessage
+                'iCalendar validation warning: '.$warningMessage
             );
         }
 
@@ -940,7 +906,7 @@ class Plugin extends DAV\ServerPlugin {
                 $vobj,
                 $parentPath,
                 &$subModified,
-                $isNew
+                $isNew,
             ]
         );
 
@@ -949,15 +915,13 @@ class Plugin extends DAV\ServerPlugin {
             $data = $vobj->serialize();
 
             // Using md5 to figure out if there was an *actual* change.
-            if (!$modified && strcmp($data, $before) !== 0) {
+            if (!$modified && 0 !== strcmp($data, $before)) {
                 $modified = true;
             }
-
         }
 
         // Destroy circular references so PHP will garbage collect the object.
         $vobj->destroy();
-
     }
 
     /**
@@ -967,11 +931,11 @@ class Plugin extends DAV\ServerPlugin {
      * @param INode $node
      * @param array $supportedPrivilegeSet
      */
-    function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet) {
-
+    public function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet)
+    {
         if ($node instanceof ICalendar) {
-            $supportedPrivilegeSet['{DAV:}read']['aggregates']['{' . self::NS_CALDAV . '}read-free-busy'] = [
-                'abstract'   => false,
+            $supportedPrivilegeSet['{DAV:}read']['aggregates']['{'.self::NS_CALDAV.'}read-free-busy'] = [
+                'abstract' => false,
                 'aggregates' => [],
             ];
         }
@@ -983,18 +947,20 @@ class Plugin extends DAV\ServerPlugin {
      * can use to create new calendars.
      *
      * @param DAV\INode $node
-     * @param string $output
+     * @param string    $output
+     *
      * @return bool
      */
-    function htmlActionsPanel(DAV\INode $node, &$output) {
-
-        if (!$node instanceof CalendarHome)
+    public function htmlActionsPanel(DAV\INode $node, &$output)
+    {
+        if (!$node instanceof CalendarHome) {
             return;
+        }
 
         $output .= '<tr><td colspan="2"><form method="post" action="">
             <h3>Create new calendar</h3>
             <input type="hidden" name="sabreAction" value="mkcol" />
-            <input type="hidden" name="resourceType" value="{DAV:}collection,{' . self::NS_CALDAV . '}calendar" />
+            <input type="hidden" name="resourceType" value="{DAV:}collection,{'.self::NS_CALDAV.'}calendar" />
             <label>Name (uri):</label> <input type="text" name="name" /><br />
             <label>Display name:</label> <input type="text" name="{DAV:}displayname" /><br />
             <input type="submit" value="create" />
@@ -1002,7 +968,6 @@ class Plugin extends DAV\ServerPlugin {
             </td></tr>';
 
         return false;
-
     }
 
     /**
@@ -1010,22 +975,22 @@ class Plugin extends DAV\ServerPlugin {
      *
      * This is used to transform data into jCal, if this was requested.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function httpAfterGet(RequestInterface $request, ResponseInterface $response) {
-
-        if (strpos($response->getHeader('Content-Type'), 'text/calendar') === false) {
+    public function httpAfterGet(RequestInterface $request, ResponseInterface $response)
+    {
+        $contentType = $response->getHeader('Content-Type');
+        if (null === $contentType || false === strpos($contentType, 'text/calendar')) {
             return;
         }
 
-        $result = HTTP\Util::negotiate(
+        $result = HTTP\negotiateContentType(
             $request->getHeader('Accept'),
             ['text/calendar', 'application/calendar+json']
         );
 
-        if ($result !== 'application/calendar+json') {
+        if ('application/calendar+json' !== $result) {
             // Do nothing
             return;
         }
@@ -1041,7 +1006,6 @@ class Plugin extends DAV\ServerPlugin {
 
         $response->setHeader('Content-Type', 'application/calendar+json');
         $response->setHeader('Content-Length', strlen($jsonBody));
-
     }
 
     /**
@@ -1055,14 +1019,12 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds support for CalDAV (rfc4791)',
-            'link'        => 'http://sabre.io/dav/caldav/',
+            'link' => 'http://sabre.io/dav/caldav/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Principal/Collection.php b/vendor/sabre/dav/lib/CalDAV/Principal/Collection.php
index e19719a76..cae29c752 100644
--- a/vendor/sabre/dav/lib/CalDAV/Principal/Collection.php
+++ b/vendor/sabre/dav/lib/CalDAV/Principal/Collection.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAVACL;
 
 /**
- * Principal collection
+ * Principal collection.
  *
  * This is an alternative collection to the standard ACL principal collection.
  * This collection adds support for the calendar-proxy-read and
@@ -16,18 +18,17 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Collection extends DAVACL\PrincipalCollection {
-
+class Collection extends DAVACL\PrincipalCollection
+{
     /**
-     * Returns a child object based on principal information
+     * Returns a child object based on principal information.
      *
      * @param array $principalInfo
+     *
      * @return User
      */
-    function getChildForPrincipal(array $principalInfo) {
-
+    public function getChildForPrincipal(array $principalInfo)
+    {
         return new User($this->principalBackend, $principalInfo);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Principal/IProxyRead.php b/vendor/sabre/dav/lib/CalDAV/Principal/IProxyRead.php
index 7dd375932..96e6991c5 100644
--- a/vendor/sabre/dav/lib/CalDAV/Principal/IProxyRead.php
+++ b/vendor/sabre/dav/lib/CalDAV/Principal/IProxyRead.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAVACL;
 
 /**
- * ProxyRead principal interface
+ * ProxyRead principal interface.
  *
  * Any principal node implementing this interface will be picked up as a 'proxy
  * principal group'.
@@ -14,6 +16,6 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IProxyRead extends DAVACL\IPrincipal {
-
+interface IProxyRead extends DAVACL\IPrincipal
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Principal/IProxyWrite.php b/vendor/sabre/dav/lib/CalDAV/Principal/IProxyWrite.php
index eda87a4ff..2556039ca 100644
--- a/vendor/sabre/dav/lib/CalDAV/Principal/IProxyWrite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Principal/IProxyWrite.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAVACL;
 
 /**
- * ProxyWrite principal interface
+ * ProxyWrite principal interface.
  *
  * Any principal node implementing this interface will be picked up as a 'proxy
  * principal group'.
@@ -14,6 +16,6 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IProxyWrite extends DAVACL\IPrincipal {
-
+interface IProxyWrite extends DAVACL\IPrincipal
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Principal/ProxyRead.php b/vendor/sabre/dav/lib/CalDAV/Principal/ProxyRead.php
index e3881831e..1b24984bd 100644
--- a/vendor/sabre/dav/lib/CalDAV/Principal/ProxyRead.php
+++ b/vendor/sabre/dav/lib/CalDAV/Principal/ProxyRead.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAV;
 use Sabre\DAVACL;
 
 /**
- * ProxyRead principal
+ * ProxyRead principal.
  *
  * This class represents a principal group, hosted under the main principal.
  * This is needed to implement 'Calendar delegation' support. This class is
@@ -16,8 +18,8 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ProxyRead implements IProxyRead {
-
+class ProxyRead implements IProxyRead
+{
     /**
      * Principal information from the parent principal.
      *
@@ -26,7 +28,7 @@ class ProxyRead implements IProxyRead {
     protected $principalInfo;
 
     /**
-     * Principal backend
+     * Principal backend.
      *
      * @var DAVACL\PrincipalBackend\BackendInterface
      */
@@ -38,13 +40,12 @@ class ProxyRead implements IProxyRead {
      * Note that you MUST supply the parent principal information.
      *
      * @param DAVACL\PrincipalBackend\BackendInterface $principalBackend
-     * @param array $principalInfo
+     * @param array                                    $principalInfo
      */
-    function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
-
+    public function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo)
+    {
         $this->principalInfo = $principalInfo;
         $this->principalBackend = $principalBackend;
-
     }
 
     /**
@@ -52,103 +53,91 @@ class ProxyRead implements IProxyRead {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return 'calendar-proxy-read';
-
     }
 
     /**
-     * Returns the last modification time
-     *
-     * @return null
+     * Returns the last modification time.
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
 
     /**
-     * Deletes the current node
+     * Deletes the current node.
      *
      * @throws DAV\Exception\Forbidden
-     * @return void
      */
-    function delete() {
-
+    public function delete()
+    {
         throw new DAV\Exception\Forbidden('Permission denied to delete node');
-
     }
 
     /**
-     * Renames the node
+     * Renames the node.
      *
      * @param string $name The new name
+     *
      * @throws DAV\Exception\Forbidden
-     * @return void
      */
-    function setName($name) {
-
+    public function setName($name)
+    {
         throw new DAV\Exception\Forbidden('Permission denied to rename file');
-
     }
 
-
     /**
-     * Returns a list of alternative urls for a principal
+     * Returns a list of alternative urls for a principal.
      *
      * This can for example be an email address, or ldap url.
      *
      * @return array
      */
-    function getAlternateUriSet() {
-
+    public function getAlternateUriSet()
+    {
         return [];
-
     }
 
     /**
-     * Returns the full principal url
+     * Returns the full principal url.
      *
      * @return string
      */
-    function getPrincipalUrl() {
-
-        return $this->principalInfo['uri'] . '/' . $this->getName();
-
+    public function getPrincipalUrl()
+    {
+        return $this->principalInfo['uri'].'/'.$this->getName();
     }
 
     /**
-     * Returns the list of group members
+     * Returns the list of group members.
      *
      * If this principal is a group, this function should return
      * all member principal uri's for the group.
      *
      * @return array
      */
-    function getGroupMemberSet() {
-
+    public function getGroupMemberSet()
+    {
         return $this->principalBackend->getGroupMemberSet($this->getPrincipalUrl());
-
     }
 
     /**
-     * Returns the list of groups this principal is member of
+     * Returns the list of groups this principal is member of.
      *
      * If this principal is a member of a (list of) groups, this function
      * should return a list of principal uri's for it's members.
      *
      * @return array
      */
-    function getGroupMembership() {
-
+    public function getGroupMembership()
+    {
         return $this->principalBackend->getGroupMembership($this->getPrincipalUrl());
-
     }
 
     /**
-     * Sets a list of group members
+     * Sets a list of group members.
      *
      * If this principal is a group, this method sets all the group members.
      * The list of members is always overwritten, never appended to.
@@ -156,26 +145,22 @@ class ProxyRead implements IProxyRead {
      * This method should throw an exception if the members could not be set.
      *
      * @param array $principals
-     * @return void
      */
-    function setGroupMemberSet(array $principals) {
-
+    public function setGroupMemberSet(array $principals)
+    {
         $this->principalBackend->setGroupMemberSet($this->getPrincipalUrl(), $principals);
-
     }
 
     /**
-     * Returns the displayname
+     * Returns the displayname.
      *
      * This should be a human readable name for the principal.
      * If none is available, return the nodename.
      *
      * @return string
      */
-    function getDisplayName() {
-
+    public function getDisplayName()
+    {
         return $this->getName();
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Principal/ProxyWrite.php b/vendor/sabre/dav/lib/CalDAV/Principal/ProxyWrite.php
index 43dd9bf07..7b9c78e0a 100644
--- a/vendor/sabre/dav/lib/CalDAV/Principal/ProxyWrite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Principal/ProxyWrite.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAV;
 use Sabre\DAVACL;
 
 /**
- * ProxyWrite principal
+ * ProxyWrite principal.
  *
  * This class represents a principal group, hosted under the main principal.
  * This is needed to implement 'Calendar delegation' support. This class is
@@ -16,35 +18,34 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ProxyWrite implements IProxyWrite {
-
+class ProxyWrite implements IProxyWrite
+{
     /**
-     * Parent principal information
+     * Parent principal information.
      *
      * @var array
      */
     protected $principalInfo;
 
     /**
-     * Principal Backend
+     * Principal Backend.
      *
      * @var DAVACL\PrincipalBackend\BackendInterface
      */
     protected $principalBackend;
 
     /**
-     * Creates the object
+     * Creates the object.
      *
      * Note that you MUST supply the parent principal information.
      *
      * @param DAVACL\PrincipalBackend\BackendInterface $principalBackend
-     * @param array $principalInfo
+     * @param array                                    $principalInfo
      */
-    function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
-
+    public function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo)
+    {
         $this->principalInfo = $principalInfo;
         $this->principalBackend = $principalBackend;
-
     }
 
     /**
@@ -52,103 +53,91 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return 'calendar-proxy-write';
-
     }
 
     /**
-     * Returns the last modification time
-     *
-     * @return null
+     * Returns the last modification time.
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
 
     /**
-     * Deletes the current node
+     * Deletes the current node.
      *
      * @throws DAV\Exception\Forbidden
-     * @return void
      */
-    function delete() {
-
+    public function delete()
+    {
         throw new DAV\Exception\Forbidden('Permission denied to delete node');
-
     }
 
     /**
-     * Renames the node
+     * Renames the node.
      *
      * @param string $name The new name
+     *
      * @throws DAV\Exception\Forbidden
-     * @return void
      */
-    function setName($name) {
-
+    public function setName($name)
+    {
         throw new DAV\Exception\Forbidden('Permission denied to rename file');
-
     }
 
-
     /**
-     * Returns a list of alternative urls for a principal
+     * Returns a list of alternative urls for a principal.
      *
      * This can for example be an email address, or ldap url.
      *
      * @return array
      */
-    function getAlternateUriSet() {
-
+    public function getAlternateUriSet()
+    {
         return [];
-
     }
 
     /**
-     * Returns the full principal url
+     * Returns the full principal url.
      *
      * @return string
      */
-    function getPrincipalUrl() {
-
-        return $this->principalInfo['uri'] . '/' . $this->getName();
-
+    public function getPrincipalUrl()
+    {
+        return $this->principalInfo['uri'].'/'.$this->getName();
     }
 
     /**
-     * Returns the list of group members
+     * Returns the list of group members.
      *
      * If this principal is a group, this function should return
      * all member principal uri's for the group.
      *
      * @return array
      */
-    function getGroupMemberSet() {
-
+    public function getGroupMemberSet()
+    {
         return $this->principalBackend->getGroupMemberSet($this->getPrincipalUrl());
-
     }
 
     /**
-     * Returns the list of groups this principal is member of
+     * Returns the list of groups this principal is member of.
      *
      * If this principal is a member of a (list of) groups, this function
      * should return a list of principal uri's for it's members.
      *
      * @return array
      */
-    function getGroupMembership() {
-
+    public function getGroupMembership()
+    {
         return $this->principalBackend->getGroupMembership($this->getPrincipalUrl());
-
     }
 
     /**
-     * Sets a list of group members
+     * Sets a list of group members.
      *
      * If this principal is a group, this method sets all the group members.
      * The list of members is always overwritten, never appended to.
@@ -156,26 +145,22 @@ class ProxyWrite implements IProxyWrite {
      * This method should throw an exception if the members could not be set.
      *
      * @param array $principals
-     * @return void
      */
-    function setGroupMemberSet(array $principals) {
-
+    public function setGroupMemberSet(array $principals)
+    {
         $this->principalBackend->setGroupMemberSet($this->getPrincipalUrl(), $principals);
-
     }
 
     /**
-     * Returns the displayname
+     * Returns the displayname.
      *
      * This should be a human readable name for the principal.
      * If none is available, return the nodename.
      *
      * @return string
      */
-    function getDisplayName() {
-
+    public function getDisplayName()
+    {
         return $this->getName();
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Principal/User.php b/vendor/sabre/dav/lib/CalDAV/Principal/User.php
index 6e97e7cca..88bf4b4f7 100644
--- a/vendor/sabre/dav/lib/CalDAV/Principal/User.php
+++ b/vendor/sabre/dav/lib/CalDAV/Principal/User.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAV;
 use Sabre\DAVACL;
 
 /**
- * CalDAV principal
+ * CalDAV principal.
  *
  * This is a standard user-principal for CalDAV. This principal is also a
  * collection and returns the caldav-proxy-read and caldav-proxy-write child
@@ -16,91 +18,91 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class User extends DAVACL\Principal implements DAV\ICollection {
-
+class User extends DAVACL\Principal implements DAV\ICollection
+{
     /**
-     * Creates a new file in the directory
+     * Creates a new file in the directory.
+     *
+     * @param string   $name Name of the file
+     * @param resource $data initial payload, passed as a readable stream resource
      *
-     * @param string $name Name of the file
-     * @param resource $data Initial payload, passed as a readable stream resource.
      * @throws DAV\Exception\Forbidden
-     * @return void
      */
-    function createFile($name, $data = null) {
-
-        throw new DAV\Exception\Forbidden('Permission denied to create file (filename ' . $name . ')');
-
+    public function createFile($name, $data = null)
+    {
+        throw new DAV\Exception\Forbidden('Permission denied to create file (filename '.$name.')');
     }
 
     /**
-     * Creates a new subdirectory
+     * Creates a new subdirectory.
      *
      * @param string $name
+     *
      * @throws DAV\Exception\Forbidden
-     * @return void
      */
-    function createDirectory($name) {
-
+    public function createDirectory($name)
+    {
         throw new DAV\Exception\Forbidden('Permission denied to create directory');
-
     }
 
     /**
-     * Returns a specific child node, referenced by its name
+     * Returns a specific child node, referenced by its name.
      *
      * @param string $name
+     *
      * @return DAV\INode
      */
-    function getChild($name) {
-
-        $principal = $this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/' . $name);
+    public function getChild($name)
+    {
+        $principal = $this->principalBackend->getPrincipalByPath($this->getPrincipalURL().'/'.$name);
         if (!$principal) {
-            throw new DAV\Exception\NotFound('Node with name ' . $name . ' was not found');
+            throw new DAV\Exception\NotFound('Node with name '.$name.' was not found');
         }
-        if ($name === 'calendar-proxy-read')
+        if ('calendar-proxy-read' === $name) {
             return new ProxyRead($this->principalBackend, $this->principalProperties);
+        }
 
-        if ($name === 'calendar-proxy-write')
+        if ('calendar-proxy-write' === $name) {
             return new ProxyWrite($this->principalBackend, $this->principalProperties);
+        }
 
-        throw new DAV\Exception\NotFound('Node with name ' . $name . ' was not found');
-
+        throw new DAV\Exception\NotFound('Node with name '.$name.' was not found');
     }
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return DAV\INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $r = [];
-        if ($this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/calendar-proxy-read')) {
+        if ($this->principalBackend->getPrincipalByPath($this->getPrincipalURL().'/calendar-proxy-read')) {
             $r[] = new ProxyRead($this->principalBackend, $this->principalProperties);
         }
-        if ($this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/calendar-proxy-write')) {
+        if ($this->principalBackend->getPrincipalByPath($this->getPrincipalURL().'/calendar-proxy-write')) {
             $r[] = new ProxyWrite($this->principalBackend, $this->principalProperties);
         }
 
         return $r;
-
     }
 
     /**
-     * Returns whether or not the child node exists
+     * Returns whether or not the child node exists.
      *
      * @param string $name
+     *
      * @return bool
      */
-    function childExists($name) {
-
+    public function childExists($name)
+    {
         try {
             $this->getChild($name);
+
             return true;
         } catch (DAV\Exception\NotFound $e) {
             return false;
         }
-
     }
 
     /**
@@ -115,21 +117,20 @@ class User extends DAVACL\Principal implements DAV\ICollection {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         $acl = parent::getACL();
         $acl[] = [
             'privilege' => '{DAV:}read',
-            'principal' => $this->principalProperties['uri'] . '/calendar-proxy-read',
+            'principal' => $this->principalProperties['uri'].'/calendar-proxy-read',
             'protected' => true,
         ];
         $acl[] = [
             'privilege' => '{DAV:}read',
-            'principal' => $this->principalProperties['uri'] . '/calendar-proxy-write',
+            'principal' => $this->principalProperties['uri'].'/calendar-proxy-write',
             'protected' => true,
         ];
-        return $acl;
 
+        return $acl;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/IInbox.php b/vendor/sabre/dav/lib/CalDAV/Schedule/IInbox.php
index c9fd77d93..64a94becc 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/IInbox.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/IInbox.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 /**
@@ -10,6 +12,6 @@ namespace Sabre\CalDAV\Schedule;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IInbox extends \Sabre\CalDAV\ICalendarObjectContainer, \Sabre\DAVACL\IACL {
-
+interface IInbox extends \Sabre\CalDAV\ICalendarObjectContainer, \Sabre\DAVACL\IACL
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/IMipPlugin.php b/vendor/sabre/dav/lib/CalDAV/Schedule/IMipPlugin.php
index 6f5acb29a..d71b3c0f8 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/IMipPlugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/IMipPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 use Sabre\DAV;
@@ -19,8 +21,8 @@ use Sabre\VObject\ITip;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class IMipPlugin extends DAV\ServerPlugin {
-
+class IMipPlugin extends DAV\ServerPlugin
+{
     /**
      * Email address used in From: header.
      *
@@ -29,7 +31,7 @@ class IMipPlugin extends DAV\ServerPlugin {
     protected $senderEmail;
 
     /**
-     * ITipMessage
+     * ITipMessage.
      *
      * @var ITip\Message
      */
@@ -43,10 +45,9 @@ class IMipPlugin extends DAV\ServerPlugin {
      *                             generally be some kind of no-reply email
      *                             address you own.
      */
-    function __construct($senderEmail) {
-
+    public function __construct($senderEmail)
+    {
         $this->senderEmail = $senderEmail;
-
     }
 
     /*
@@ -60,10 +61,9 @@ class IMipPlugin extends DAV\ServerPlugin {
      * @param DAV\Server $server
      * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $server->on('schedule', [$this, 'schedule'], 120);
-
     }
 
     /**
@@ -74,67 +74,68 @@ class IMipPlugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'imip';
-
     }
 
     /**
      * Event handler for the 'schedule' event.
      *
      * @param ITip\Message $iTipMessage
-     * @return void
      */
-    function schedule(ITip\Message $iTipMessage) {
-
+    public function schedule(ITip\Message $iTipMessage)
+    {
         // Not sending any emails if the system considers the update
         // insignificant.
         if (!$iTipMessage->significantChange) {
             if (!$iTipMessage->scheduleStatus) {
                 $iTipMessage->scheduleStatus = '1.0;We got the message, but it\'s not significant enough to warrant an email';
             }
+
             return;
         }
 
         $summary = $iTipMessage->message->VEVENT->SUMMARY;
 
-        if (parse_url($iTipMessage->sender, PHP_URL_SCHEME) !== 'mailto')
+        if ('mailto' !== parse_url($iTipMessage->sender, PHP_URL_SCHEME)) {
             return;
+        }
 
-        if (parse_url($iTipMessage->recipient, PHP_URL_SCHEME) !== 'mailto')
+        if ('mailto' !== parse_url($iTipMessage->recipient, PHP_URL_SCHEME)) {
             return;
+        }
 
         $sender = substr($iTipMessage->sender, 7);
         $recipient = substr($iTipMessage->recipient, 7);
 
         if ($iTipMessage->senderName) {
-            $sender = $iTipMessage->senderName . ' <' . $sender . '>';
+            $sender = $iTipMessage->senderName.' <'.$sender.'>';
         }
-        if ($iTipMessage->recipientName) {
-            $recipient = $iTipMessage->recipientName . ' <' . $recipient . '>';
+        if ($iTipMessage->recipientName && $iTipMessage->recipientName != $recipient) {
+            $recipient = $iTipMessage->recipientName.' <'.$recipient.'>';
         }
 
         $subject = 'SabreDAV iTIP message';
         switch (strtoupper($iTipMessage->method)) {
-            case 'REPLY' :
-                $subject = 'Re: ' . $summary;
+            case 'REPLY':
+                $subject = 'Re: '.$summary;
                 break;
-            case 'REQUEST' :
-                $subject = $summary;
+            case 'REQUEST':
+                $subject = 'Invitation: '.$summary;
                 break;
-            case 'CANCEL' :
-                $subject = 'Cancelled: ' . $summary;
+            case 'CANCEL':
+                $subject = 'Cancelled: '.$summary;
                 break;
         }
 
         $headers = [
-            'Reply-To: ' . $sender,
-            'From: ' . $this->senderEmail,
-            'Content-Type: text/calendar; charset=UTF-8; method=' . $iTipMessage->method,
+            'Reply-To: '.$sender,
+            'From: '.$iTipMessage->senderName.' <'.$this->senderEmail.'>',
+            'Content-Type: text/calendar; charset=UTF-8; method='.$iTipMessage->method,
         ];
         if (DAV\Server::$exposeVersion) {
-            $headers[] = 'X-Sabre-Version: ' . DAV\Version::VERSION;
+            $headers[] = 'X-Sabre-Version: '.DAV\Version::VERSION;
         }
         $this->mail(
             $recipient,
@@ -143,7 +144,6 @@ class IMipPlugin extends DAV\ServerPlugin {
             $headers
         );
         $iTipMessage->scheduleStatus = '1.1; Scheduling message is sent via iMip';
-
     }
 
     // @codeCoverageIgnoreStart
@@ -152,16 +152,14 @@ class IMipPlugin extends DAV\ServerPlugin {
     /**
      * This function is responsible for sending the actual email.
      *
-     * @param string $to Recipient email address
+     * @param string $to      Recipient email address
      * @param string $subject Subject of the email
-     * @param string $body iCalendar body
-     * @param array $headers List of headers
-     * @return void
+     * @param string $body    iCalendar body
+     * @param array  $headers List of headers
      */
-    protected function mail($to, $subject, $body, array $headers) {
-
+    protected function mail($to, $subject, $body, array $headers)
+    {
         mail($to, $subject, $body, implode("\r\n", $headers));
-
     }
 
     // @codeCoverageIgnoreEnd
@@ -177,14 +175,12 @@ class IMipPlugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Email delivery (rfc6047) for CalDAV scheduling',
-            'link'        => 'http://sabre.io/dav/scheduling/',
+            'link' => 'http://sabre.io/dav/scheduling/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/IOutbox.php b/vendor/sabre/dav/lib/CalDAV/Schedule/IOutbox.php
index 88fbdc411..384b503df 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/IOutbox.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/IOutbox.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 /**
@@ -10,6 +12,6 @@ namespace Sabre\CalDAV\Schedule;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IOutbox extends \Sabre\DAV\ICollection, \Sabre\DAVACL\IACL {
-
+interface IOutbox extends \Sabre\DAV\ICollection, \Sabre\DAVACL\IACL
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/ISchedulingObject.php b/vendor/sabre/dav/lib/CalDAV/Schedule/ISchedulingObject.php
index b37cb40a1..345b55d9f 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/ISchedulingObject.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/ISchedulingObject.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 /**
- * The SchedulingObject represents a scheduling object in the Inbox collection
+ * The SchedulingObject represents a scheduling object in the Inbox collection.
  *
  * @license http://sabre.io/license/ Modified BSD License
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  */
-interface ISchedulingObject extends \Sabre\CalDAV\ICalendarObject {
-
+interface ISchedulingObject extends \Sabre\CalDAV\ICalendarObject
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php b/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php
index 81b017307..d92f1dd4c 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 use Sabre\CalDAV;
@@ -9,41 +11,40 @@ use Sabre\DAVACL;
 use Sabre\VObject;
 
 /**
- * The CalDAV scheduling inbox
+ * The CalDAV scheduling inbox.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Inbox extends DAV\Collection implements IInbox {
-
+class Inbox extends DAV\Collection implements IInbox
+{
     use DAVACL\ACLTrait;
 
     /**
-     * CalDAV backend
+     * CalDAV backend.
      *
      * @var Backend\BackendInterface
      */
     protected $caldavBackend;
 
     /**
-     * The principal Uri
+     * The principal Uri.
      *
      * @var string
      */
     protected $principalUri;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Backend\SchedulingSupport $caldavBackend
-     * @param string $principalUri
+     * @param string                    $principalUri
      */
-    function __construct(Backend\SchedulingSupport $caldavBackend, $principalUri) {
-
+    public function __construct(Backend\SchedulingSupport $caldavBackend, $principalUri)
+    {
         $this->caldavBackend = $caldavBackend;
         $this->principalUri = $principalUri;
-
     }
 
     /**
@@ -53,19 +54,18 @@ class Inbox extends DAV\Collection implements IInbox {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return 'inbox';
-
     }
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return \Sabre\DAV\INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $objs = $this->caldavBackend->getSchedulingObjects($this->principalUri);
         $children = [];
         foreach ($objs as $obj) {
@@ -73,12 +73,12 @@ class Inbox extends DAV\Collection implements IInbox {
             $obj['principaluri'] = $this->principalUri;
             $children[] = new SchedulingObject($this->caldavBackend, $obj);
         }
-        return $children;
 
+        return $children;
     }
 
     /**
-     * Creates a new file in the directory
+     * Creates a new file in the directory.
      *
      * Data will either be supplied as a stream resource, or in certain cases
      * as a string. Keep in mind that you may have to support either.
@@ -97,27 +97,26 @@ class Inbox extends DAV\Collection implements IInbox {
      * return the same contents of what was submitted here, you are strongly
      * recommended to omit the ETag.
      *
-     * @param string $name Name of the file
+     * @param string          $name Name of the file
      * @param resource|string $data Initial payload
-     * @return null|string
+     *
+     * @return string|null
      */
-    function createFile($name, $data = null) {
-
+    public function createFile($name, $data = null)
+    {
         $this->caldavBackend->createSchedulingObject($this->principalUri, $name, $data);
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->principalUri;
-
     }
 
     /**
@@ -132,8 +131,8 @@ class Inbox extends DAV\Collection implements IInbox {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return [
             [
                 'privilege' => '{DAV:}read',
@@ -152,16 +151,15 @@ class Inbox extends DAV\Collection implements IInbox {
             ],
             [
                 'privilege' => '{DAV:}unbind',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-deliver',
+                'privilege' => '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-deliver',
                 'principal' => '{DAV:}authenticated',
                 'protected' => true,
             ],
         ];
-
     }
 
     /**
@@ -179,10 +177,11 @@ class Inbox extends DAV\Collection implements IInbox {
      * documented by \Sabre\CalDAV\CalendarQueryParser.
      *
      * @param array $filters
+     *
      * @return array
      */
-    function calendarQuery(array $filters) {
-
+    public function calendarQuery(array $filters)
+    {
         $result = [];
         $validator = new CalDAV\CalendarQueryValidator();
 
@@ -196,8 +195,7 @@ class Inbox extends DAV\Collection implements IInbox {
             // Destroy circular references to PHP will GC the object.
             $vObject->destroy();
         }
-        return $result;
 
+        return $result;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php b/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php
index 888ea3086..1442c4cc6 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 use Sabre\CalDAV;
@@ -7,7 +9,7 @@ use Sabre\DAV;
 use Sabre\DAVACL;
 
 /**
- * The CalDAV scheduling outbox
+ * The CalDAV scheduling outbox.
  *
  * The outbox is mainly used as an endpoint in the tree for a client to do
  * free-busy requests. This functionality is completely handled by the
@@ -17,26 +19,25 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Outbox extends DAV\Collection implements IOutbox {
-
+class Outbox extends DAV\Collection implements IOutbox
+{
     use DAVACL\ACLTrait;
 
     /**
-     * The principal Uri
+     * The principal Uri.
      *
      * @var string
      */
     protected $principalUri;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param string $principalUri
      */
-    function __construct($principalUri) {
-
+    public function __construct($principalUri)
+    {
         $this->principalUri = $principalUri;
-
     }
 
     /**
@@ -46,34 +47,31 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return 'outbox';
-
     }
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return \Sabre\DAV\INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         return [];
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->principalUri;
-
     }
 
     /**
@@ -88,11 +86,11 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return [
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
+                'privilege' => '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-send',
                 'principal' => $this->getOwner(),
                 'protected' => true,
             ],
@@ -102,22 +100,20 @@ class Outbox extends DAV\Collection implements IOutbox {
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'privilege' => '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-send',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'principal' => $this->getOwner().'/calendar-proxy-read',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ],
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php b/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php
index 0b991e619..d2c9b68e9 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 use DateTimeZone;
@@ -28,7 +30,7 @@ use Sabre\VObject\Reader;
 
 /**
  * CalDAV scheduling plugin.
- * =========================
+ * =========================.
  *
  * This plugin provides the functionality added by the "Scheduling Extensions
  * to CalDAV" standard, as defined in RFC6638.
@@ -53,10 +55,10 @@ use Sabre\VObject\Reader;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends ServerPlugin {
-
+class Plugin extends ServerPlugin
+{
     /**
-     * This is the official CalDAV namespace
+     * This is the official CalDAV namespace.
      */
     const NS_CALDAV = 'urn:ietf:params:xml:ns:caldav';
 
@@ -72,10 +74,9 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['calendar-auto-schedule', 'calendar-availability'];
-
     }
 
     /**
@@ -86,49 +87,46 @@ class Plugin extends ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'caldav-schedule';
-
     }
 
     /**
-     * Initializes the plugin
+     * Initializes the plugin.
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
+    public function initialize(Server $server)
+    {
         $this->server = $server;
-        $server->on('method:POST',              [$this, 'httpPost']);
-        $server->on('propFind',                 [$this, 'propFind']);
-        $server->on('propPatch',                [$this, 'propPatch']);
-        $server->on('calendarObjectChange',     [$this, 'calendarObjectChange']);
-        $server->on('beforeUnbind',             [$this, 'beforeUnbind']);
-        $server->on('schedule',                 [$this, 'scheduleLocalDelivery']);
+        $server->on('method:POST', [$this, 'httpPost']);
+        $server->on('propFind', [$this, 'propFind']);
+        $server->on('propPatch', [$this, 'propPatch']);
+        $server->on('calendarObjectChange', [$this, 'calendarObjectChange']);
+        $server->on('beforeUnbind', [$this, 'beforeUnbind']);
+        $server->on('schedule', [$this, 'scheduleLocalDelivery']);
         $server->on('getSupportedPrivilegeSet', [$this, 'getSupportedPrivilegeSet']);
 
-        $ns = '{' . self::NS_CALDAV . '}';
+        $ns = '{'.self::NS_CALDAV.'}';
 
-        /**
+        /*
          * This information ensures that the {DAV:}resourcetype property has
          * the correct values.
          */
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IOutbox'] = $ns . 'schedule-outbox';
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IInbox'] = $ns . 'schedule-inbox';
+        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IOutbox'] = $ns.'schedule-outbox';
+        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IInbox'] = $ns.'schedule-inbox';
 
-        /**
+        /*
          * Properties we protect are made read-only by the server.
          */
         array_push($server->protectedProperties,
-            $ns . 'schedule-inbox-URL',
-            $ns . 'schedule-outbox-URL',
-            $ns . 'calendar-user-address-set',
-            $ns . 'calendar-user-type',
-            $ns . 'schedule-default-calendar-URL'
+            $ns.'schedule-inbox-URL',
+            $ns.'schedule-outbox-URL',
+            $ns.'calendar-user-address-set',
+            $ns.'calendar-user-type',
+            $ns.'schedule-default-calendar-URL'
         );
-
     }
 
     /**
@@ -139,10 +137,11 @@ class Plugin extends ServerPlugin {
      * available for the specified uri.
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getHTTPMethods($uri) {
-
+    public function getHTTPMethods($uri)
+    {
         try {
             $node = $this->server->tree->getNodeForPath($uri);
         } catch (NotFound $e) {
@@ -154,21 +153,21 @@ class Plugin extends ServerPlugin {
         }
 
         return [];
-
     }
 
     /**
      * This method handles POST request for the outbox.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpPost(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPost(RequestInterface $request, ResponseInterface $response)
+    {
         // Checking if this is a text/calendar content type
         $contentType = $request->getHeader('Content-Type');
-        if (strpos($contentType, 'text/calendar') !== 0) {
+        if (!$contentType || 0 !== strpos($contentType, 'text/calendar')) {
             return;
         }
 
@@ -180,8 +179,9 @@ class Plugin extends ServerPlugin {
         } catch (NotFound $e) {
             return;
         }
-        if (!$node instanceof IOutbox)
+        if (!$node instanceof IOutbox) {
             return;
+        }
 
         $this->server->transactionType = 'post-caldav-outbox';
         $this->outboxRequest($node, $request, $response);
@@ -189,7 +189,6 @@ class Plugin extends ServerPlugin {
         // Returning false breaks the event chain and tells the server we've
         // handled the request.
         return false;
-
     }
 
     /**
@@ -198,43 +197,36 @@ class Plugin extends ServerPlugin {
      * We use this event to add calendar-auto-schedule-specific properties.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFind(PropFind $propFind, INode $node) {
-
+    public function propFind(PropFind $propFind, INode $node)
+    {
         if ($node instanceof DAVACL\IPrincipal) {
-
             $caldavPlugin = $this->server->getPlugin('caldav');
             $principalUrl = $node->getPrincipalUrl();
 
             // schedule-outbox-URL property
-            $propFind->handle('{' . self::NS_CALDAV . '}schedule-outbox-URL', function() use ($principalUrl, $caldavPlugin) {
-
+            $propFind->handle('{'.self::NS_CALDAV.'}schedule-outbox-URL', function () use ($principalUrl, $caldavPlugin) {
                 $calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
                 if (!$calendarHomePath) {
                     return null;
                 }
-                $outboxPath = $calendarHomePath . '/outbox/';
+                $outboxPath = $calendarHomePath.'/outbox/';
 
                 return new LocalHref($outboxPath);
-
             });
             // schedule-inbox-URL property
-            $propFind->handle('{' . self::NS_CALDAV . '}schedule-inbox-URL', function() use ($principalUrl, $caldavPlugin) {
-
+            $propFind->handle('{'.self::NS_CALDAV.'}schedule-inbox-URL', function () use ($principalUrl, $caldavPlugin) {
                 $calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
                 if (!$calendarHomePath) {
                     return null;
                 }
-                $inboxPath = $calendarHomePath . '/inbox/';
+                $inboxPath = $calendarHomePath.'/inbox/';
 
                 return new LocalHref($inboxPath);
-
             });
 
-            $propFind->handle('{' . self::NS_CALDAV . '}schedule-default-calendar-URL', function() use ($principalUrl, $caldavPlugin) {
-
+            $propFind->handle('{'.self::NS_CALDAV.'}schedule-default-calendar-URL', function () use ($principalUrl, $caldavPlugin) {
                 // We don't support customizing this property yet, so in the
                 // meantime we just grab the first calendar in the home-set.
                 $calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
@@ -243,7 +235,7 @@ class Plugin extends ServerPlugin {
                     return null;
                 }
 
-                $sccs = '{' . self::NS_CALDAV . '}supported-calendar-component-set';
+                $sccs = '{'.self::NS_CALDAV.'}supported-calendar-component-set';
 
                 $result = $this->server->getPropertiesForPath($calendarHomePath, [
                     '{DAV:}resourcetype',
@@ -252,18 +244,17 @@ class Plugin extends ServerPlugin {
                 ], 1);
 
                 foreach ($result as $child) {
-                    if (!isset($child[200]['{DAV:}resourcetype']) || !$child[200]['{DAV:}resourcetype']->is('{' . self::NS_CALDAV . '}calendar')) {
+                    if (!isset($child[200]['{DAV:}resourcetype']) || !$child[200]['{DAV:}resourcetype']->is('{'.self::NS_CALDAV.'}calendar')) {
                         // Node is either not a calendar
                         continue;
                     }
                     if (isset($child[200]['{DAV:}share-access'])) {
                         $shareAccess = $child[200]['{DAV:}share-access']->getValue();
-                        if ($shareAccess !== Sharing\Plugin::ACCESS_NOTSHARED && $shareAccess !== Sharing\Plugin::ACCESS_SHAREDOWNER) {
+                        if (Sharing\Plugin::ACCESS_NOTSHARED !== $shareAccess && Sharing\Plugin::ACCESS_SHAREDOWNER !== $shareAccess) {
                             // Node is a shared node, not owned by the relevant
                             // user.
                             continue;
                         }
-
                     }
                     if (!isset($child[200][$sccs]) || in_array('VEVENT', $child[200][$sccs]->getValue())) {
                         // Either there is no supported-calendar-component-set
@@ -271,82 +262,70 @@ class Plugin extends ServerPlugin {
                         return new LocalHref($child['href']);
                     }
                 }
-
             });
 
             // The server currently reports every principal to be of type
             // 'INDIVIDUAL'
-            $propFind->handle('{' . self::NS_CALDAV . '}calendar-user-type', function() {
-
+            $propFind->handle('{'.self::NS_CALDAV.'}calendar-user-type', function () {
                 return 'INDIVIDUAL';
-
             });
-
         }
 
         // Mapping the old property to the new property.
-        $propFind->handle('{http://calendarserver.org/ns/}calendar-availability', function() use ($propFind, $node) {
-
-             // In case it wasn't clear, the only difference is that we map the
+        $propFind->handle('{http://calendarserver.org/ns/}calendar-availability', function () use ($propFind, $node) {
+            // In case it wasn't clear, the only difference is that we map the
             // old property to a different namespace.
-             $availProp = '{' . self::NS_CALDAV . '}calendar-availability';
-             $subPropFind = new PropFind(
+            $availProp = '{'.self::NS_CALDAV.'}calendar-availability';
+            $subPropFind = new PropFind(
                  $propFind->getPath(),
                  [$availProp]
              );
 
-             $this->server->getPropertiesByNode(
+            $this->server->getPropertiesByNode(
                  $subPropFind,
                  $node
              );
 
-             $propFind->set(
+            $propFind->set(
                  '{http://calendarserver.org/ns/}calendar-availability',
                  $subPropFind->get($availProp),
                  $subPropFind->getStatus($availProp)
              );
-
         });
-
     }
 
     /**
      * This method is called during property updates.
      *
-     * @param string $path
+     * @param string    $path
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch($path, PropPatch $propPatch) {
-
+    public function propPatch($path, PropPatch $propPatch)
+    {
         // Mapping the old property to the new property.
-        $propPatch->handle('{http://calendarserver.org/ns/}calendar-availability', function($value) use ($path) {
-
-            $availProp = '{' . self::NS_CALDAV . '}calendar-availability';
+        $propPatch->handle('{http://calendarserver.org/ns/}calendar-availability', function ($value) use ($path) {
+            $availProp = '{'.self::NS_CALDAV.'}calendar-availability';
             $subPropPatch = new PropPatch([$availProp => $value]);
             $this->server->emit('propPatch', [$path, $subPropPatch]);
             $subPropPatch->commit();
 
             return $subPropPatch->getResult()[$availProp];
-
         });
-
     }
 
     /**
      * This method is triggered whenever there was a calendar object gets
      * created or updated.
      *
-     * @param RequestInterface $request HTTP request
-     * @param ResponseInterface $response HTTP Response
-     * @param VCalendar $vCal Parsed iCalendar object
-     * @param mixed $calendarPath Path to calendar collection
-     * @param mixed $modified The iCalendar object has been touched.
-     * @param mixed $isNew Whether this was a new item or we're updating one
-     * @return void
+     * @param RequestInterface  $request      HTTP request
+     * @param ResponseInterface $response     HTTP Response
+     * @param VCalendar         $vCal         Parsed iCalendar object
+     * @param mixed             $calendarPath Path to calendar collection
+     * @param mixed             $modified     the iCalendar object has been touched
+     * @param mixed             $isNew        Whether this was a new item or we're updating one
      */
-    function calendarObjectChange(RequestInterface $request, ResponseInterface $response, VCalendar $vCal, $calendarPath, &$modified, $isNew) {
-
+    public function calendarObjectChange(RequestInterface $request, ResponseInterface $response, VCalendar $vCal, $calendarPath, &$modified, $isNew)
+    {
         if (!$this->scheduleReply($this->server->httpRequest)) {
             return;
         }
@@ -370,17 +349,15 @@ class Plugin extends ServerPlugin {
             // Destroy circular references so PHP will GC the object.
             $oldObj->destroy();
         }
-
     }
 
     /**
      * This method is responsible for delivering the ITip message.
      *
      * @param ITip\Message $iTipMessage
-     * @return void
      */
-    function deliver(ITip\Message $iTipMessage) {
-
+    public function deliver(ITip\Message $iTipMessage)
+    {
         $this->server->emit('schedule', [$iTipMessage]);
         if (!$iTipMessage->scheduleStatus) {
             $iTipMessage->scheduleStatus = '5.2;There was no system capable of delivering the scheduling message';
@@ -391,7 +368,6 @@ class Plugin extends ServerPlugin {
         if (!$iTipMessage->significantChange && in_array($baseCode, ['3', '5'])) {
             $iTipMessage->scheduleStatus = null;
         }
-
     }
 
     /**
@@ -401,13 +377,14 @@ class Plugin extends ServerPlugin {
      * cancellations, and organizers get 'DECLINED' statuses.
      *
      * @param string $path
-     * @return void
      */
-    function beforeUnbind($path) {
-
+    public function beforeUnbind($path)
+    {
         // FIXME: We shouldn't trigger this functionality when we're issuing a
         // MOVE. This is a hack.
-        if ($this->server->httpRequest->getMethod() === 'MOVE') return;
+        if ('MOVE' === $this->server->httpRequest->getMethod()) {
+            return;
+        }
 
         $node = $this->server->tree->getNodeForPath($path);
 
@@ -429,7 +406,6 @@ class Plugin extends ServerPlugin {
         foreach ($messages as $message) {
             $this->deliver($message);
         }
-
     }
 
     /**
@@ -439,10 +415,9 @@ class Plugin extends ServerPlugin {
      * scheduling object.
      *
      * @param ITip\Message $iTipMessage
-     * @return void
      */
-    function scheduleLocalDelivery(ITip\Message $iTipMessage) {
-
+    public function scheduleLocalDelivery(ITip\Message $iTipMessage)
+    {
         $aclPlugin = $this->server->getPlugin('acl');
 
         // Local delivery is not available if the ACL plugin is not loaded.
@@ -450,11 +425,12 @@ class Plugin extends ServerPlugin {
             return;
         }
 
-        $caldavNS = '{' . self::NS_CALDAV . '}';
+        $caldavNS = '{'.self::NS_CALDAV.'}';
 
         $principalUri = $aclPlugin->getPrincipalByUri($iTipMessage->recipient);
         if (!$principalUri) {
             $iTipMessage->scheduleStatus = '3.7;Could not find principal.';
+
             return;
         }
 
@@ -470,9 +446,9 @@ class Plugin extends ServerPlugin {
             $principalUri,
             [
                 '{DAV:}principal-URL',
-                 $caldavNS . 'calendar-home-set',
-                 $caldavNS . 'schedule-inbox-URL',
-                 $caldavNS . 'schedule-default-calendar-URL',
+                 $caldavNS.'calendar-home-set',
+                 $caldavNS.'schedule-inbox-URL',
+                 $caldavNS.'schedule-default-calendar-URL',
                 '{http://sabredav.org/ns}email-address',
             ]
         );
@@ -480,31 +456,35 @@ class Plugin extends ServerPlugin {
         // Re-registering the ACL event
         $this->server->on('propFind', [$aclPlugin, 'propFind'], 20);
 
-        if (!isset($result[$caldavNS . 'schedule-inbox-URL'])) {
+        if (!isset($result[$caldavNS.'schedule-inbox-URL'])) {
             $iTipMessage->scheduleStatus = '5.2;Could not find local inbox';
+
             return;
         }
-        if (!isset($result[$caldavNS . 'calendar-home-set'])) {
+        if (!isset($result[$caldavNS.'calendar-home-set'])) {
             $iTipMessage->scheduleStatus = '5.2;Could not locate a calendar-home-set';
+
             return;
         }
-        if (!isset($result[$caldavNS . 'schedule-default-calendar-URL'])) {
+        if (!isset($result[$caldavNS.'schedule-default-calendar-URL'])) {
             $iTipMessage->scheduleStatus = '5.2;Could not find a schedule-default-calendar-URL property';
+
             return;
         }
 
-        $calendarPath = $result[$caldavNS . 'schedule-default-calendar-URL']->getHref();
-        $homePath = $result[$caldavNS . 'calendar-home-set']->getHref();
-        $inboxPath = $result[$caldavNS . 'schedule-inbox-URL']->getHref();
+        $calendarPath = $result[$caldavNS.'schedule-default-calendar-URL']->getHref();
+        $homePath = $result[$caldavNS.'calendar-home-set']->getHref();
+        $inboxPath = $result[$caldavNS.'schedule-inbox-URL']->getHref();
 
-        if ($iTipMessage->method === 'REPLY') {
+        if ('REPLY' === $iTipMessage->method) {
             $privilege = 'schedule-deliver-reply';
         } else {
             $privilege = 'schedule-deliver-invite';
         }
 
-        if (!$aclPlugin->checkPrivileges($inboxPath, $caldavNS . $privilege, DAVACL\Plugin::R_PARENT, false)) {
-            $iTipMessage->scheduleStatus = '3.8;insufficient privileges: ' . $privilege . ' is required on the recipient schedule inbox.';
+        if (!$aclPlugin->checkPrivileges($inboxPath, $caldavNS.$privilege, DAVACL\Plugin::R_PARENT, false)) {
+            $iTipMessage->scheduleStatus = '3.8;insufficient privileges: '.$privilege.' is required on the recipient schedule inbox.';
+
             return;
         }
 
@@ -512,7 +492,7 @@ class Plugin extends ServerPlugin {
         // the users' calendars.
         $uid = $iTipMessage->uid;
 
-        $newFileName = 'sabredav-' . \Sabre\DAV\UUIDUtil::getUUID() . '.ics';
+        $newFileName = 'sabredav-'.\Sabre\DAV\UUIDUtil::getUUID().'.ics';
 
         $home = $this->server->tree->getNodeForPath($homePath);
         $inbox = $this->server->tree->getNodeForPath($inboxPath);
@@ -524,7 +504,7 @@ class Plugin extends ServerPlugin {
         $result = $home->getCalendarObjectByUID($uid);
         if ($result) {
             // There was an existing object, we need to update probably.
-            $objectPath = $homePath . '/' . $result;
+            $objectPath = $homePath.'/'.$result;
             $objectNode = $this->server->tree->getNodeForPath($objectPath);
             $oldICalendarData = $objectNode->get();
             $currentObject = Reader::read($oldICalendarData);
@@ -545,6 +525,7 @@ class Plugin extends ServerPlugin {
             // The implication is that processMessage did not understand the
             // iTip message.
             $iTipMessage->scheduleStatus = '5.0;iTip message was not processed by the server, likely because we didn\'t understand it.';
+
             return;
         }
 
@@ -558,7 +539,7 @@ class Plugin extends ServerPlugin {
             // If the message was a reply, we may have to inform other
             // attendees of this attendees status. Therefore we're shooting off
             // another itipMessage.
-            if ($iTipMessage->method === 'REPLY') {
+            if ('REPLY' === $iTipMessage->method) {
                 $this->processICalendarChange(
                     $oldICalendarData,
                     $newObject,
@@ -569,7 +550,6 @@ class Plugin extends ServerPlugin {
             $objectNode->put($newObject->serialize());
         }
         $iTipMessage->scheduleStatus = '1.2;Message delivered locally';
-
     }
 
     /**
@@ -581,54 +561,53 @@ class Plugin extends ServerPlugin {
      * @param INode $node
      * @param array $supportedPrivilegeSet
      */
-    function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet) {
-
-        $ns = '{' . self::NS_CALDAV . '}';
+    public function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet)
+    {
+        $ns = '{'.self::NS_CALDAV.'}';
         if ($node instanceof IOutbox) {
-            $supportedPrivilegeSet[$ns . 'schedule-send'] = [
-                'abstract'   => false,
+            $supportedPrivilegeSet[$ns.'schedule-send'] = [
+                'abstract' => false,
                 'aggregates' => [
-                    $ns . 'schedule-send-invite' => [
-                        'abstract'   => false,
+                    $ns.'schedule-send-invite' => [
+                        'abstract' => false,
                         'aggregates' => [],
                     ],
-                    $ns . 'schedule-send-reply' => [
-                        'abstract'   => false,
+                    $ns.'schedule-send-reply' => [
+                        'abstract' => false,
                         'aggregates' => [],
                     ],
-                    $ns . 'schedule-send-freebusy' => [
-                        'abstract'   => false,
+                    $ns.'schedule-send-freebusy' => [
+                        'abstract' => false,
                         'aggregates' => [],
                     ],
                     // Privilege from an earlier scheduling draft, but still
                     // used by some clients.
-                    $ns . 'schedule-post-vevent' => [
-                        'abstract'   => false,
+                    $ns.'schedule-post-vevent' => [
+                        'abstract' => false,
                         'aggregates' => [],
                     ],
-                ]
+                ],
             ];
         }
         if ($node instanceof IInbox) {
-            $supportedPrivilegeSet[$ns . 'schedule-deliver'] = [
-                'abstract'   => false,
+            $supportedPrivilegeSet[$ns.'schedule-deliver'] = [
+                'abstract' => false,
                 'aggregates' => [
-                    $ns . 'schedule-deliver-invite' => [
-                        'abstract'   => false,
+                    $ns.'schedule-deliver-invite' => [
+                        'abstract' => false,
                         'aggregates' => [],
                     ],
-                    $ns . 'schedule-deliver-reply' => [
-                        'abstract'   => false,
+                    $ns.'schedule-deliver-reply' => [
+                        'abstract' => false,
                         'aggregates' => [],
                     ],
-                    $ns . 'schedule-query-freebusy' => [
-                        'abstract'   => false,
+                    $ns.'schedule-query-freebusy' => [
+                        'abstract' => false,
                         'aggregates' => [],
                     ],
-                ]
+                ],
             ];
         }
-
     }
 
     /**
@@ -642,22 +621,22 @@ class Plugin extends ServerPlugin {
      * This method may update $newObject to add any status changes.
      *
      * @param VCalendar|string $oldObject
-     * @param VCalendar $newObject
-     * @param array $addresses
-     * @param array $ignore Any addresses to not send messages to.
-     * @param bool $modified A marker to indicate that the original object
-     *   modified by this process.
-     * @return void
+     * @param VCalendar        $newObject
+     * @param array            $addresses
+     * @param array            $ignore    any addresses to not send messages to
+     * @param bool             $modified  a marker to indicate that the original object
+     *                                    modified by this process
      */
-    protected function processICalendarChange($oldObject = null, VCalendar $newObject, array $addresses, array $ignore = [], &$modified = false) {
-
+    protected function processICalendarChange($oldObject = null, VCalendar $newObject, array $addresses, array $ignore = [], &$modified = false)
+    {
         $broker = new ITip\Broker();
         $messages = $broker->parseEvent($newObject, $addresses, $oldObject);
 
-        if ($messages) $modified = true;
+        if ($messages) {
+            $modified = true;
+        }
 
         foreach ($messages as $message) {
-
             if (in_array($message->recipient, $ignore)) {
                 continue;
             }
@@ -669,36 +648,32 @@ class Plugin extends ServerPlugin {
                     $newObject->VEVENT->ORGANIZER['SCHEDULE-STATUS'] = $message->getScheduleStatus();
                 }
                 unset($newObject->VEVENT->ORGANIZER['SCHEDULE-FORCE-SEND']);
-
             } else {
-
-                if (isset($newObject->VEVENT->ATTENDEE)) foreach ($newObject->VEVENT->ATTENDEE as $attendee) {
-
-                    if ($attendee->getNormalizedValue() === $message->recipient) {
-                        if ($message->scheduleStatus) {
-                            $attendee['SCHEDULE-STATUS'] = $message->getScheduleStatus();
+                if (isset($newObject->VEVENT->ATTENDEE)) {
+                    foreach ($newObject->VEVENT->ATTENDEE as $attendee) {
+                        if ($attendee->getNormalizedValue() === $message->recipient) {
+                            if ($message->scheduleStatus) {
+                                $attendee['SCHEDULE-STATUS'] = $message->getScheduleStatus();
+                            }
+                            unset($attendee['SCHEDULE-FORCE-SEND']);
+                            break;
                         }
-                        unset($attendee['SCHEDULE-FORCE-SEND']);
-                        break;
                     }
-
                 }
-
             }
-
         }
-
     }
 
     /**
      * Returns a list of addresses that are associated with a principal.
      *
      * @param string $principal
+     *
      * @return array
      */
-    protected function getAddressesForPrincipal($principal) {
-
-        $CUAS = '{' . self::NS_CALDAV . '}calendar-user-address-set';
+    protected function getAddressesForPrincipal($principal)
+    {
+        $CUAS = '{'.self::NS_CALDAV.'}calendar-user-address-set';
 
         $properties = $this->server->getProperties(
             $principal,
@@ -707,12 +682,12 @@ class Plugin extends ServerPlugin {
 
         // If we can't find this information, we'll stop processing
         if (!isset($properties[$CUAS])) {
-            return;
+            return [];
         }
 
         $addresses = $properties[$CUAS]->getHrefs();
-        return $addresses;
 
+        return $addresses;
     }
 
     /**
@@ -726,20 +701,19 @@ class Plugin extends ServerPlugin {
      * extensions, but iCal depends on a feature from that spec, so we
      * implement it.
      *
-     * @param IOutbox $outboxNode
-     * @param RequestInterface $request
+     * @param IOutbox           $outboxNode
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function outboxRequest(IOutbox $outboxNode, RequestInterface $request, ResponseInterface $response) {
-
+    public function outboxRequest(IOutbox $outboxNode, RequestInterface $request, ResponseInterface $response)
+    {
         $outboxPath = $request->getPath();
 
         // Parsing the request body
         try {
             $vObject = VObject\Reader::read($request->getBody());
         } catch (VObject\ParseException $e) {
-            throw new BadRequest('The request body must be a valid iCalendar object. Parse error: ' . $e->getMessage());
+            throw new BadRequest('The request body must be a valid iCalendar object. Parse error: '.$e->getMessage());
         }
 
         // The incoming iCalendar object must have a METHOD property, and a
@@ -747,7 +721,7 @@ class Plugin extends ServerPlugin {
         // this is.
         $componentType = null;
         foreach ($vObject->getComponents() as $component) {
-            if ($component->name !== 'VTIMEZONE') {
+            if ('VTIMEZONE' !== $component->name) {
                 $componentType = $component->name;
                 break;
             }
@@ -757,7 +731,7 @@ class Plugin extends ServerPlugin {
         }
 
         // Validating the METHOD
-        $method = strtoupper((string)$vObject->METHOD);
+        $method = strtoupper((string) $vObject->METHOD);
         if (!$method) {
             throw new BadRequest('A METHOD property must be specified in iTIP messages');
         }
@@ -768,46 +742,42 @@ class Plugin extends ServerPlugin {
 
         $acl = $this->server->getPlugin('acl');
 
-        if ($componentType === 'VFREEBUSY' && $method === 'REQUEST') {
-
-            $acl && $acl->checkPrivileges($outboxPath, '{' . self::NS_CALDAV . '}schedule-send-freebusy');
+        if ('VFREEBUSY' === $componentType && 'REQUEST' === $method) {
+            $acl && $acl->checkPrivileges($outboxPath, '{'.self::NS_CALDAV.'}schedule-send-freebusy');
             $this->handleFreeBusyRequest($outboxNode, $vObject, $request, $response);
 
             // Destroy circular references so PHP can GC the object.
             $vObject->destroy();
             unset($vObject);
-
         } else {
-
             throw new NotImplemented('We only support VFREEBUSY (REQUEST) on this endpoint');
-
         }
-
     }
 
     /**
      * This method is responsible for parsing a free-busy query request and
      * returning it's result.
      *
-     * @param IOutbox $outbox
+     * @param IOutbox           $outbox
      * @param VObject\Component $vObject
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return string
      */
-    protected function handleFreeBusyRequest(IOutbox $outbox, VObject\Component $vObject, RequestInterface $request, ResponseInterface $response) {
-
+    protected function handleFreeBusyRequest(IOutbox $outbox, VObject\Component $vObject, RequestInterface $request, ResponseInterface $response)
+    {
         $vFreeBusy = $vObject->VFREEBUSY;
         $organizer = $vFreeBusy->ORGANIZER;
 
-        $organizer = (string)$organizer;
+        $organizer = (string) $organizer;
 
         // Validating if the organizer matches the owner of the inbox.
         $owner = $outbox->getOwner();
 
-        $caldavNS = '{' . self::NS_CALDAV . '}';
+        $caldavNS = '{'.self::NS_CALDAV.'}';
 
-        $uas = $caldavNS . 'calendar-user-address-set';
+        $uas = $caldavNS.'calendar-user-address-set';
         $props = $this->server->getProperties($owner, [$uas]);
 
         if (empty($props[$uas]) || !in_array($organizer, $props[$uas]->getHrefs())) {
@@ -820,10 +790,9 @@ class Plugin extends ServerPlugin {
 
         $attendees = [];
         foreach ($vFreeBusy->ATTENDEE as $attendee) {
-            $attendees[] = (string)$attendee;
+            $attendees[] = (string) $attendee;
         }
 
-
         if (!isset($vFreeBusy->DTSTART) || !isset($vFreeBusy->DTEND)) {
             throw new BadRequest('DTSTART and DTEND must both be specified');
         }
@@ -840,9 +809,7 @@ class Plugin extends ServerPlugin {
         $dom->formatOutput = true;
         $scheduleResponse = $dom->createElement('cal:schedule-response');
         foreach ($this->server->xml->namespaceMap as $namespace => $prefix) {
-
-            $scheduleResponse->setAttribute('xmlns:' . $prefix, $namespace);
-
+            $scheduleResponse->setAttribute('xmlns:'.$prefix, $namespace);
         }
         $dom->appendChild($scheduleResponse);
 
@@ -861,11 +828,9 @@ class Plugin extends ServerPlugin {
             $xresponse->appendChild($reqStatus);
 
             if (isset($result['calendar-data'])) {
-
                 $calendardata = $dom->createElement('cal:calendar-data');
                 $calendardata->appendChild($dom->createTextNode(str_replace("\r\n", "\n", $result['calendar-data']->serialize())));
                 $xresponse->appendChild($calendardata);
-
             }
             $scheduleResponse->appendChild($xresponse);
         }
@@ -873,12 +838,11 @@ class Plugin extends ServerPlugin {
         $response->setStatus(200);
         $response->setHeader('Content-Type', 'application/xml');
         $response->setBody($dom->saveXML());
-
     }
 
     /**
      * Returns free-busy information for a specific address. The returned
-     * data is an array containing the following properties:
+     * data is an array containing the following properties:.
      *
      * calendar-data : A VFREEBUSY VObject
      * request-status : an iTip status code.
@@ -888,54 +852,56 @@ class Plugin extends ServerPlugin {
      *   * 2.0;description
      *   * 3.7;description
      *
-     * @param string $email address
+     * @param string             $email   address
      * @param \DateTimeInterface $start
      * @param \DateTimeInterface $end
-     * @param VObject\Component $request
+     * @param VObject\Component  $request
+     *
      * @return array
      */
-    protected function getFreeBusyForEmail($email, \DateTimeInterface $start, \DateTimeInterface $end, VObject\Component $request) {
-
-        $caldavNS = '{' . self::NS_CALDAV . '}';
+    protected function getFreeBusyForEmail($email, \DateTimeInterface $start, \DateTimeInterface $end, VObject\Component $request)
+    {
+        $caldavNS = '{'.self::NS_CALDAV.'}';
 
         $aclPlugin = $this->server->getPlugin('acl');
-        if (substr($email, 0, 7) === 'mailto:') $email = substr($email, 7);
+        if ('mailto:' === substr($email, 0, 7)) {
+            $email = substr($email, 7);
+        }
 
         $result = $aclPlugin->principalSearch(
             ['{http://sabredav.org/ns}email-address' => $email],
             [
                 '{DAV:}principal-URL',
-                $caldavNS . 'calendar-home-set',
-                $caldavNS . 'schedule-inbox-URL',
+                $caldavNS.'calendar-home-set',
+                $caldavNS.'schedule-inbox-URL',
                 '{http://sabredav.org/ns}email-address',
-
             ]
         );
 
         if (!count($result)) {
             return [
                 'request-status' => '3.7;Could not find principal',
-                'href'           => 'mailto:' . $email,
+                'href' => 'mailto:'.$email,
             ];
         }
 
-        if (!isset($result[0][200][$caldavNS . 'calendar-home-set'])) {
+        if (!isset($result[0][200][$caldavNS.'calendar-home-set'])) {
             return [
                 'request-status' => '3.7;No calendar-home-set property found',
-                'href'           => 'mailto:' . $email,
+                'href' => 'mailto:'.$email,
             ];
         }
-        if (!isset($result[0][200][$caldavNS . 'schedule-inbox-URL'])) {
+        if (!isset($result[0][200][$caldavNS.'schedule-inbox-URL'])) {
             return [
                 'request-status' => '3.7;No schedule-inbox-URL property found',
-                'href'           => 'mailto:' . $email,
+                'href' => 'mailto:'.$email,
             ];
         }
-        $homeSet = $result[0][200][$caldavNS . 'calendar-home-set']->getHref();
-        $inboxUrl = $result[0][200][$caldavNS . 'schedule-inbox-URL']->getHref();
+        $homeSet = $result[0][200][$caldavNS.'calendar-home-set']->getHref();
+        $inboxUrl = $result[0][200][$caldavNS.'schedule-inbox-URL']->getHref();
 
         // Do we have permission?
-        $aclPlugin->checkPrivileges($inboxUrl, $caldavNS . 'schedule-query-freebusy');
+        $aclPlugin->checkPrivileges($inboxUrl, $caldavNS.'schedule-query-freebusy');
 
         // Grabbing the calendar list
         $objects = [];
@@ -946,11 +912,11 @@ class Plugin extends ServerPlugin {
                 continue;
             }
 
-            $sct = $caldavNS . 'schedule-calendar-transp';
-            $ctz = $caldavNS . 'calendar-timezone';
+            $sct = $caldavNS.'schedule-calendar-transp';
+            $ctz = $caldavNS.'calendar-timezone';
             $props = $node->getProperties([$sct, $ctz]);
 
-            if (isset($props[$sct]) && $props[$sct]->getValue() == ScheduleCalendarTransp::TRANSPARENT) {
+            if (isset($props[$sct]) && ScheduleCalendarTransp::TRANSPARENT == $props[$sct]->getValue()) {
                 // If a calendar is marked as 'transparent', it means we must
                 // ignore it for free-busy purposes.
                 continue;
@@ -962,41 +928,40 @@ class Plugin extends ServerPlugin {
 
                 // Destroy circular references so PHP can garbage collect the object.
                 $vtimezoneObj->destroy();
-
             }
 
             // Getting the list of object uris within the time-range
             $urls = $node->calendarQuery([
-                'name'         => 'VCALENDAR',
+                'name' => 'VCALENDAR',
                 'comp-filters' => [
                     [
-                        'name'           => 'VEVENT',
-                        'comp-filters'   => [],
-                        'prop-filters'   => [],
+                        'name' => 'VEVENT',
+                        'comp-filters' => [],
+                        'prop-filters' => [],
                         'is-not-defined' => false,
-                        'time-range'     => [
+                        'time-range' => [
                             'start' => $start,
-                            'end'   => $end,
+                            'end' => $end,
                         ],
                     ],
                 ],
-                'prop-filters'   => [],
+                'prop-filters' => [],
                 'is-not-defined' => false,
-                'time-range'     => null,
+                'time-range' => null,
             ]);
 
-            $calObjects = array_map(function($url) use ($node) {
+            $calObjects = array_map(function ($url) use ($node) {
                 $obj = $node->getChild($url)->get();
+
                 return $obj;
             }, $urls);
 
             $objects = array_merge($objects, $calObjects);
-
         }
 
         $inboxProps = $this->server->getProperties(
             $inboxUrl,
-            $caldavNS . 'calendar-availability'
+            $caldavNS.'calendar-availability'
         );
 
         $vcalendar = new VObject\Component\VCalendar();
@@ -1011,21 +976,21 @@ class Plugin extends ServerPlugin {
         if ($inboxProps) {
             $generator->setVAvailability(
                 VObject\Reader::read(
-                    $inboxProps[$caldavNS . 'calendar-availability']
+                    $inboxProps[$caldavNS.'calendar-availability']
                 )
             );
         }
 
         $result = $generator->getResult();
 
-        $vcalendar->VFREEBUSY->ATTENDEE = 'mailto:' . $email;
-        $vcalendar->VFREEBUSY->UID = (string)$request->VFREEBUSY->UID;
+        $vcalendar->VFREEBUSY->ATTENDEE = 'mailto:'.$email;
+        $vcalendar->VFREEBUSY->UID = (string) $request->VFREEBUSY->UID;
         $vcalendar->VFREEBUSY->ORGANIZER = clone $request->VFREEBUSY->ORGANIZER;
 
         return [
-            'calendar-data'  => $result,
+            'calendar-data' => $result,
             'request-status' => '2.0;Success',
-            'href'           => 'mailto:' . $email,
+            'href' => 'mailto:'.$email,
         ];
     }
 
@@ -1034,13 +999,14 @@ class Plugin extends ServerPlugin {
      * and returns false if it's 'F', otherwise true.
      *
      * @param RequestInterface $request
+     *
      * @return bool
      */
-    private function scheduleReply(RequestInterface $request) {
-
+    private function scheduleReply(RequestInterface $request)
+    {
         $scheduleReply = $request->getHeader('Schedule-Reply');
-        return $scheduleReply !== 'F';
 
+        return 'F' !== $scheduleReply;
     }
 
     /**
@@ -1054,13 +1020,12 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds calendar-auto-schedule, as defined in rfc6638',
-            'link'        => 'http://sabre.io/dav/scheduling/',
+            'link' => 'http://sabre.io/dav/scheduling/',
         ];
-
     }
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php b/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php
index 0cd05a965..d34c92327 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php
@@ -1,35 +1,23 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 use Sabre\CalDAV\Backend;
 use Sabre\DAV\Exception\MethodNotAllowed;
 
 /**
- * The SchedulingObject represents a scheduling object in the Inbox collection
+ * The SchedulingObject represents a scheduling object in the Inbox collection.
  *
  * @author Brett (https://github.com/bretten)
  * @license http://sabre.io/license/ Modified BSD License
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  */
-class SchedulingObject extends \Sabre\CalDAV\CalendarObject implements ISchedulingObject {
-
-    /**
-     /* The CalDAV backend
-     *
-     * @var Backend\SchedulingSupport
-     */
-    protected $caldavBackend;
-
-    /**
-     * Array with information about this SchedulingObject
-     *
-     * @var array
-     */
-    protected $objectData;
-
+class SchedulingObject extends \Sabre\CalDAV\CalendarObject implements ISchedulingObject
+{
     /**
-     * Constructor
+     * Constructor.
      *
      * The following properties may be passed within $objectData:
      *
@@ -43,73 +31,65 @@ class SchedulingObject extends \Sabre\CalDAV\CalendarObject implements IScheduli
      *   * acl - (optional) Use this to override the default ACL for the node.
      *
      * @param Backend\SchedulingSupport $caldavBackend
-     * @param array $objectData
+     * @param array                     $objectData
      */
-    function __construct(Backend\SchedulingSupport $caldavBackend, array $objectData) {
-
-        $this->caldavBackend = $caldavBackend;
+    public function __construct(Backend\SchedulingSupport $caldavBackend, array $objectData)
+    {
+        parent::__construct($caldavBackend, [], $objectData);
 
         if (!isset($objectData['uri'])) {
             throw new \InvalidArgumentException('The objectData argument must contain an \'uri\' property');
         }
-
-        $this->objectData = $objectData;
-
     }
 
     /**
-     * Returns the ICalendar-formatted object
+     * Returns the ICalendar-formatted object.
      *
      * @return string
      */
-    function get() {
-
+    public function get()
+    {
         // Pre-populating the 'calendardata' is optional, if we don't have it
         // already we fetch it from the backend.
         if (!isset($this->objectData['calendardata'])) {
             $this->objectData = $this->caldavBackend->getSchedulingObject($this->objectData['principaluri'], $this->objectData['uri']);
         }
-        return $this->objectData['calendardata'];
 
+        return $this->objectData['calendardata'];
     }
 
     /**
-     * Updates the ICalendar-formatted object
+     * Updates the ICalendar-formatted object.
      *
      * @param string|resource $calendarData
+     *
      * @return string
      */
-    function put($calendarData) {
-
+    public function put($calendarData)
+    {
         throw new MethodNotAllowed('Updating scheduling objects is not supported');
-
     }
 
     /**
-     * Deletes the scheduling message
-     *
-     * @return void
+     * Deletes the scheduling message.
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->caldavBackend->deleteSchedulingObject($this->objectData['principaluri'], $this->objectData['uri']);
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->objectData['principaluri'];
-
     }
 
-
     /**
      * Returns a list of ACE's for this node.
      *
@@ -122,8 +102,8 @@ class SchedulingObject extends \Sabre\CalDAV\CalendarObject implements IScheduli
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         // An alternative acl may be specified in the object data.
         //
 
@@ -140,16 +120,14 @@ class SchedulingObject extends \Sabre\CalDAV\CalendarObject implements IScheduli
             ],
             [
                 'privilege' => '{DAV:}all',
-                'principal' => $this->objectData['principaluri'] . '/calendar-proxy-write',
+                'principal' => $this->objectData['principaluri'].'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->objectData['principaluri'] . '/calendar-proxy-read',
+                'principal' => $this->objectData['principaluri'].'/calendar-proxy-read',
                 'protected' => true,
             ],
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php b/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php
index 7a77616e3..818392f57 100644
--- a/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV\Sharing\Plugin as SPlugin;
@@ -11,8 +13,8 @@ use Sabre\DAV\Sharing\Plugin as SPlugin;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SharedCalendar extends Calendar implements ISharedCalendar {
-
+class SharedCalendar extends Calendar implements ISharedCalendar
+{
     /**
      * Returns the 'access level' for the instance of this shared resource.
      *
@@ -21,10 +23,9 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return int
      */
-    function getShareAccess() {
-
+    public function getShareAccess()
+    {
         return isset($this->calendarInfo['share-access']) ? $this->calendarInfo['share-access'] : SPlugin::ACCESS_NOTSHARED;
-
     }
 
     /**
@@ -38,10 +39,9 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return string
      */
-    function getShareResourceUri() {
-
+    public function getShareResourceUri()
+    {
         return $this->calendarInfo['share-resource-uri'];
-
     }
 
     /**
@@ -50,12 +50,10 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      * Every item must be a Sharee object.
      *
      * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
-     * @return void
      */
-    function updateInvites(array $sharees) {
-
+    public function updateInvites(array $sharees)
+    {
         $this->caldavBackend->updateInvites($this->calendarInfo['id'], $sharees);
-
     }
 
     /**
@@ -74,10 +72,9 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return \Sabre\DAV\Xml\Element\Sharee[]
      */
-    function getInvites() {
-
+    public function getInvites()
+    {
         return $this->caldavBackend->getInvites($this->calendarInfo['id']);
-
     }
 
     /**
@@ -87,12 +84,10 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      * subscribable calendar.
      *
      * @param bool $value
-     * @return void
      */
-    function setPublishStatus($value) {
-
+    public function setPublishStatus($value)
+    {
         $this->caldavBackend->setPublishStatus($this->calendarInfo['id'], $value);
-
     }
 
     /**
@@ -107,13 +102,13 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         $acl = [];
 
         switch ($this->getShareAccess()) {
-            case SPlugin::ACCESS_NOTSHARED :
-            case SPlugin::ACCESS_SHAREDOWNER :
+            case SPlugin::ACCESS_NOTSHARED:
+            case SPlugin::ACCESS_SHAREDOWNER:
                 $acl[] = [
                     'privilege' => '{DAV:}share',
                     'principal' => $this->calendarInfo['principaluri'],
@@ -121,11 +116,11 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}share',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-write',
                     'protected' => true,
                 ];
-                // No break intentional!
-            case SPlugin::ACCESS_READWRITE :
+                // no break intentional!
+            case SPlugin::ACCESS_READWRITE:
                 $acl[] = [
                     'privilege' => '{DAV:}write',
                     'principal' => $this->calendarInfo['principaluri'],
@@ -133,11 +128,11 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}write',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-write',
                     'protected' => true,
                 ];
-                // No break intentional!
-            case SPlugin::ACCESS_READ :
+                // no break intentional!
+            case SPlugin::ACCESS_READ:
                 $acl[] = [
                     'privilege' => '{DAV:}write-properties',
                     'principal' => $this->calendarInfo['principaluri'],
@@ -145,7 +140,7 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}write-properties',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-write',
                     'protected' => true,
                 ];
                 $acl[] = [
@@ -155,26 +150,25 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}read',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-read',
                     'protected' => true,
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}read',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-write',
                     'protected' => true,
                 ];
                 $acl[] = [
-                    'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+                    'privilege' => '{'.Plugin::NS_CALDAV.'}read-free-busy',
                     'principal' => '{DAV:}authenticated',
                     'protected' => true,
                 ];
                 break;
         }
-        return $acl;
 
+        return $acl;
     }
 
-
     /**
      * This method returns the ACL's for calendar objects in this calendar.
      * The result of this method automatically gets passed to the
@@ -182,15 +176,13 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return array
      */
-    function getChildACL() {
-
+    public function getChildACL()
+    {
         $acl = [];
 
         switch ($this->getShareAccess()) {
-            case SPlugin::ACCESS_NOTSHARED :
-                // No break intentional
-            case SPlugin::ACCESS_SHAREDOWNER :
-                // No break intentional
+            case SPlugin::ACCESS_NOTSHARED:
+            case SPlugin::ACCESS_SHAREDOWNER:
             case SPlugin::ACCESS_READWRITE:
                 $acl[] = [
                     'privilege' => '{DAV:}write',
@@ -199,10 +191,10 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}write',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-write',
                     'protected' => true,
                 ];
-                // No break intentional
+                // no break intentional
             case SPlugin::ACCESS_READ:
                 $acl[] = [
                     'privilege' => '{DAV:}read',
@@ -211,19 +203,17 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}read',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-write',
                     'protected' => true,
                 ];
                 $acl[] = [
                     'privilege' => '{DAV:}read',
-                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
+                    'principal' => $this->calendarInfo['principaluri'].'/calendar-proxy-read',
                     'protected' => true,
                 ];
                 break;
         }
 
         return $acl;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php b/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php
index 5cce79678..be8c46a9e 100644
--- a/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
@@ -23,8 +25,8 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SharingPlugin extends DAV\ServerPlugin {
-
+class SharingPlugin extends DAV\ServerPlugin
+{
     /**
      * Reference to SabreDAV server object.
      *
@@ -40,10 +42,9 @@ class SharingPlugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['calendarserver-sharing'];
-
     }
 
     /**
@@ -54,10 +55,9 @@ class SharingPlugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'caldav-sharing';
-
     }
 
     /**
@@ -69,10 +69,9 @@ class SharingPlugin extends DAV\ServerPlugin {
      * This method should set up the required event subscriptions.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
 
         if (is_null($this->server->getPlugin('sharing'))) {
@@ -81,19 +80,18 @@ class SharingPlugin extends DAV\ServerPlugin {
 
         array_push(
             $this->server->protectedProperties,
-            '{' . Plugin::NS_CALENDARSERVER . '}invite',
-            '{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes',
-            '{' . Plugin::NS_CALENDARSERVER . '}shared-url'
+            '{'.Plugin::NS_CALENDARSERVER.'}invite',
+            '{'.Plugin::NS_CALENDARSERVER.'}allowed-sharing-modes',
+            '{'.Plugin::NS_CALENDARSERVER.'}shared-url'
         );
 
-        $this->server->xml->elementMap['{' . Plugin::NS_CALENDARSERVER . '}share'] = 'Sabre\\CalDAV\\Xml\\Request\\Share';
-        $this->server->xml->elementMap['{' . Plugin::NS_CALENDARSERVER . '}invite-reply'] = 'Sabre\\CalDAV\\Xml\\Request\\InviteReply';
-
-        $this->server->on('propFind',     [$this, 'propFindEarly']);
-        $this->server->on('propFind',     [$this, 'propFindLate'], 150);
-        $this->server->on('propPatch',    [$this, 'propPatch'], 40);
-        $this->server->on('method:POST',  [$this, 'httpPost']);
+        $this->server->xml->elementMap['{'.Plugin::NS_CALENDARSERVER.'}share'] = 'Sabre\\CalDAV\\Xml\\Request\\Share';
+        $this->server->xml->elementMap['{'.Plugin::NS_CALENDARSERVER.'}invite-reply'] = 'Sabre\\CalDAV\\Xml\\Request\\InviteReply';
 
+        $this->server->on('propFind', [$this, 'propFindEarly']);
+        $this->server->on('propFind', [$this, 'propFindLate'], 150);
+        $this->server->on('propPatch', [$this, 'propPatch'], 40);
+        $this->server->on('method:POST', [$this, 'httpPost']);
     }
 
     /**
@@ -103,47 +101,17 @@ class SharingPlugin extends DAV\ServerPlugin {
      * This allows us to inject any properties early.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
-     * @return void
+     * @param DAV\INode    $node
      */
-    function propFindEarly(DAV\PropFind $propFind, DAV\INode $node) {
-
+    public function propFindEarly(DAV\PropFind $propFind, DAV\INode $node)
+    {
         if ($node instanceof ISharedCalendar) {
-
-            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}invite', function() use ($node) {
-
-                // Fetching owner information
-                $props = $this->server->getPropertiesForPath($node->getOwner(), [
-                    '{http://sabredav.org/ns}email-address',
-                    '{DAV:}displayname',
-                ], 0);
-
-                $ownerInfo = [
-                    'href' => $node->getOwner(),
-                ];
-
-                if (isset($props[0][200])) {
-
-                    // We're mapping the internal webdav properties to the
-                    // elements caldav-sharing expects.
-                    if (isset($props[0][200]['{http://sabredav.org/ns}email-address'])) {
-                        $ownerInfo['href'] = 'mailto:' . $props[0][200]['{http://sabredav.org/ns}email-address'];
-                    }
-                    if (isset($props[0][200]['{DAV:}displayname'])) {
-                        $ownerInfo['commonName'] = $props[0][200]['{DAV:}displayname'];
-                    }
-
-                }
-
+            $propFind->handle('{'.Plugin::NS_CALENDARSERVER.'}invite', function () use ($node) {
                 return new Xml\Property\Invite(
-                    $node->getInvites(),
-                    $ownerInfo
+                    $node->getInvites()
                 );
-
             });
-
         }
-
     }
 
     /**
@@ -152,31 +120,27 @@ class SharingPlugin extends DAV\ServerPlugin {
      * have been shared.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
-     * @return void
+     * @param DAV\INode    $node
      */
-    function propFindLate(DAV\PropFind $propFind, DAV\INode $node) {
-
+    public function propFindLate(DAV\PropFind $propFind, DAV\INode $node)
+    {
         if ($node instanceof ISharedCalendar) {
             $shareAccess = $node->getShareAccess();
             if ($rt = $propFind->get('{DAV:}resourcetype')) {
                 switch ($shareAccess) {
-                    case \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER :
-                        $rt->add('{' . Plugin::NS_CALENDARSERVER . '}shared-owner');
+                    case \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER:
+                        $rt->add('{'.Plugin::NS_CALENDARSERVER.'}shared-owner');
                         break;
-                    case \Sabre\DAV\Sharing\Plugin::ACCESS_READ :
-                    case \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE :
-                        $rt->add('{' . Plugin::NS_CALENDARSERVER . '}shared');
+                    case \Sabre\DAV\Sharing\Plugin::ACCESS_READ:
+                    case \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE:
+                        $rt->add('{'.Plugin::NS_CALENDARSERVER.'}shared');
                         break;
-
                 }
             }
-            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes', function() {
+            $propFind->handle('{'.Plugin::NS_CALENDARSERVER.'}allowed-sharing-modes', function () {
                 return new Xml\Property\AllowedSharingModes(true, false);
             });
-
         }
-
     }
 
     /**
@@ -190,20 +154,21 @@ class SharingPlugin extends DAV\ServerPlugin {
      * Even though this is no longer in the current spec, we keep this around
      * because OS X 10.7 may still make use of this feature.
      *
-     * @param string $path
+     * @param string        $path
      * @param DAV\PropPatch $propPatch
-     * @return void
      */
-    function propPatch($path, DAV\PropPatch $propPatch) {
-
+    public function propPatch($path, DAV\PropPatch $propPatch)
+    {
         $node = $this->server->tree->getNodeForPath($path);
-        if (!$node instanceof ISharedCalendar)
+        if (!$node instanceof ISharedCalendar) {
             return;
+        }
 
-        if ($node->getShareAccess() === \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER || $node->getShareAccess() === \Sabre\DAV\Sharing\Plugin::ACCESS_NOTSHARED) {
-
-            $propPatch->handle('{DAV:}resourcetype', function($value) use ($node) {
-                if ($value->is('{' . Plugin::NS_CALENDARSERVER . '}shared-owner')) return false;
+        if (\Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER === $node->getShareAccess() || \Sabre\DAV\Sharing\Plugin::ACCESS_NOTSHARED === $node->getShareAccess()) {
+            $propPatch->handle('{DAV:}resourcetype', function ($value) use ($node) {
+                if ($value->is('{'.Plugin::NS_CALENDARSERVER.'}shared-owner')) {
+                    return false;
+                }
                 $shares = $node->getInvites();
                 foreach ($shares as $share) {
                     $share->access = DAV\Sharing\Plugin::ACCESS_NOACCESS;
@@ -211,28 +176,30 @@ class SharingPlugin extends DAV\ServerPlugin {
                 $node->updateInvites($shares);
 
                 return true;
-
             });
-
         }
-
     }
 
     /**
      * We intercept this to handle POST requests on calendars.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return null|bool
+     *
+     * @return bool|null
      */
-    function httpPost(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPost(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         // Only handling xml
         $contentType = $request->getHeader('Content-Type');
-        if (strpos($contentType, 'application/xml') === false && strpos($contentType, 'text/xml') === false)
+        if (null === $contentType) {
             return;
+        }
+        if (false === strpos($contentType, 'application/xml') && false === strpos($contentType, 'text/xml')) {
+            return;
+        }
 
         // Making sure the node exists
         try {
@@ -255,10 +222,9 @@ class SharingPlugin extends DAV\ServerPlugin {
         $message = $this->server->xml->parse($requestBody, $request->getUrl(), $documentType);
 
         switch ($documentType) {
-
             // Both the DAV:share-resource and CALENDARSERVER:share requests
             // behave identically.
-            case '{' . Plugin::NS_CALENDARSERVER . '}share' :
+            case '{'.Plugin::NS_CALENDARSERVER.'}share':
 
                 $sharingPlugin = $this->server->getPlugin('sharing');
                 $sharingPlugin->shareResource($path, $message->sharees);
@@ -273,7 +239,7 @@ class SharingPlugin extends DAV\ServerPlugin {
 
             // The invite-reply document is sent when the user replies to an
             // invitation of a calendar share.
-            case '{' . Plugin::NS_CALENDARSERVER . '}invite-reply' :
+            case '{'.Plugin::NS_CALENDARSERVER.'}invite-reply':
 
                 // This only works on the calendar-home-root node.
                 if (!$node instanceof CalendarHome) {
@@ -304,20 +270,20 @@ class SharingPlugin extends DAV\ServerPlugin {
 
                 if ($url) {
                     $writer = $this->server->xml->getWriter();
+                    $writer->contextUri = $request->getUrl();
                     $writer->openMemory();
                     $writer->startDocument();
-                    $writer->startElement('{' . Plugin::NS_CALENDARSERVER . '}shared-as');
+                    $writer->startElement('{'.Plugin::NS_CALENDARSERVER.'}shared-as');
                     $writer->write(new LocalHref($url));
                     $writer->endElement();
                     $response->setHeader('Content-Type', 'application/xml');
                     $response->setBody($writer->outputMemory());
-
                 }
 
                 // Breaking the event chain
                 return false;
 
-            case '{' . Plugin::NS_CALENDARSERVER . '}publish-calendar' :
+            case '{'.Plugin::NS_CALENDARSERVER.'}publish-calendar':
 
                 // We can only deal with IShareableCalendar objects
                 if (!$node instanceof ISharedCalendar) {
@@ -345,7 +311,7 @@ class SharingPlugin extends DAV\ServerPlugin {
                 // Breaking the event chain
                 return false;
 
-            case '{' . Plugin::NS_CALENDARSERVER . '}unpublish-calendar' :
+            case '{'.Plugin::NS_CALENDARSERVER.'}unpublish-calendar':
 
                 // We can only deal with IShareableCalendar objects
                 if (!$node instanceof ISharedCalendar) {
@@ -371,11 +337,7 @@ class SharingPlugin extends DAV\ServerPlugin {
 
                 // Breaking the event chain
                 return false;
-
         }
-
-
-
     }
 
     /**
@@ -389,13 +351,12 @@ class SharingPlugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds support for caldav-sharing.',
-            'link'        => 'http://sabre.io/dav/caldav-sharing/',
+            'link' => 'http://sabre.io/dav/caldav-sharing/',
         ];
-
     }
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Subscriptions/ISubscription.php b/vendor/sabre/dav/lib/CalDAV/Subscriptions/ISubscription.php
index 7ba259c7b..e83082c52 100644
--- a/vendor/sabre/dav/lib/CalDAV/Subscriptions/ISubscription.php
+++ b/vendor/sabre/dav/lib/CalDAV/Subscriptions/ISubscription.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Subscriptions;
 
 use Sabre\DAV\ICollection;
 use Sabre\DAV\IProperties;
 
 /**
- * ISubscription
+ * ISubscription.
  *
  * Nodes implementing this interface represent calendar subscriptions.
  *
@@ -34,7 +36,6 @@ use Sabre\DAV\IProperties;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ISubscription extends ICollection, IProperties {
-
-
+interface ISubscription extends ICollection, IProperties
+{
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Subscriptions/Plugin.php b/vendor/sabre/dav/lib/CalDAV/Subscriptions/Plugin.php
index 877d96c6c..238866894 100644
--- a/vendor/sabre/dav/lib/CalDAV/Subscriptions/Plugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/Subscriptions/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Subscriptions;
 
 use Sabre\DAV\INode;
@@ -17,8 +19,8 @@ use Sabre\DAV\ServerPlugin;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends ServerPlugin {
-
+class Plugin extends ServerPlugin
+{
     /**
      * This initializes the plugin.
      *
@@ -28,10 +30,9 @@ class Plugin extends ServerPlugin {
      * This method should set up the required event subscriptions.
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
+    public function initialize(Server $server)
+    {
         $server->resourceTypeMapping['Sabre\\CalDAV\\Subscriptions\\ISubscription'] =
             '{http://calendarserver.org/ns/}subscribed';
 
@@ -39,7 +40,6 @@ class Plugin extends ServerPlugin {
             'Sabre\\DAV\\Xml\\Property\\Href';
 
         $server->on('propFind', [$this, 'propFind'], 150);
-
     }
 
     /**
@@ -50,21 +50,19 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['calendarserver-subscribed'];
-
     }
 
     /**
      * Triggered after properties have been fetched.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFind(PropFind $propFind, INode $node) {
-
+    public function propFind(PropFind $propFind, INode $node)
+    {
         // There's a bunch of properties that must appear as a self-closing
         // xml-element. This event handler ensures that this will be the case.
         $props = [
@@ -74,13 +72,10 @@ class Plugin extends ServerPlugin {
         ];
 
         foreach ($props as $prop) {
-
-            if ($propFind->getStatus($prop) === 200) {
+            if (200 === $propFind->getStatus($prop)) {
                 $propFind->set($prop, '', 200);
             }
-
         }
-
     }
 
     /**
@@ -91,10 +86,9 @@ class Plugin extends ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'subscriptions';
-
     }
 
     /**
@@ -108,13 +102,12 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'This plugin allows users to store iCalendar subscriptions in their calendar-home.',
-            'link'        => null,
+            'link' => null,
         ];
-
     }
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php b/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php
index 6a1851ed8..0b0282abe 100644
--- a/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php
+++ b/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Subscriptions;
 
 use Sabre\CalDAV\Backend\SubscriptionSupport;
@@ -10,7 +12,7 @@ use Sabre\DAVACL\ACLTrait;
 use Sabre\DAVACL\IACL;
 
 /**
- * Subscription Node
+ * Subscription Node.
  *
  * This node represents a subscription.
  *
@@ -18,32 +20,32 @@ use Sabre\DAVACL\IACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Subscription extends Collection implements ISubscription, IACL {
-
+class Subscription extends Collection implements ISubscription, IACL
+{
     use ACLTrait;
 
     /**
-     * caldavBackend
+     * caldavBackend.
      *
      * @var SubscriptionSupport
      */
     protected $caldavBackend;
 
     /**
-     * subscriptionInfo
+     * subscriptionInfo.
      *
      * @var array
      */
     protected $subscriptionInfo;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param SubscriptionSupport $caldavBackend
-     * @param array $subscriptionInfo
+     * @param array               $subscriptionInfo
      */
-    function __construct(SubscriptionSupport $caldavBackend, array $subscriptionInfo) {
-
+    public function __construct(SubscriptionSupport $caldavBackend, array $subscriptionInfo)
+    {
         $this->caldavBackend = $caldavBackend;
         $this->subscriptionInfo = $subscriptionInfo;
 
@@ -56,10 +58,9 @@ class Subscription extends Collection implements ISubscription, IACL {
 
         foreach ($required as $r) {
             if (!isset($subscriptionInfo[$r])) {
-                throw new \InvalidArgumentException('The ' . $r . ' field is required when creating a subscription node');
+                throw new \InvalidArgumentException('The '.$r.' field is required when creating a subscription node');
             }
         }
-
     }
 
     /**
@@ -69,47 +70,41 @@ class Subscription extends Collection implements ISubscription, IACL {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->subscriptionInfo['uri'];
-
     }
 
     /**
-     * Returns the last modification time
+     * Returns the last modification time.
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         if (isset($this->subscriptionInfo['lastmodified'])) {
             return $this->subscriptionInfo['lastmodified'];
         }
-
     }
 
     /**
-     * Deletes the current node
-     *
-     * @return void
+     * Deletes the current node.
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->caldavBackend->deleteSubscription(
             $this->subscriptionInfo['id']
         );
-
     }
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return \Sabre\DAV\INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         return [];
-
     }
 
     /**
@@ -122,15 +117,13 @@ class Subscription extends Collection implements ISubscription, IACL {
      * Read the PropPatch documentation for more information.
      *
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch(PropPatch $propPatch) {
-
+    public function propPatch(PropPatch $propPatch)
+    {
         return $this->caldavBackend->updateSubscription(
             $this->subscriptionInfo['id'],
             $propPatch
         );
-
     }
 
     /**
@@ -146,29 +139,27 @@ class Subscription extends Collection implements ISubscription, IACL {
      * The Server class will filter out the extra.
      *
      * @param array $properties
+     *
      * @return array
      */
-    function getProperties($properties) {
-
+    public function getProperties($properties)
+    {
         $r = [];
 
         foreach ($properties as $prop) {
-
             switch ($prop) {
-                case '{http://calendarserver.org/ns/}source' :
+                case '{http://calendarserver.org/ns/}source':
                     $r[$prop] = new Href($this->subscriptionInfo['source']);
                     break;
-                default :
+                default:
                     if (array_key_exists($prop, $this->subscriptionInfo)) {
                         $r[$prop] = $this->subscriptionInfo[$prop];
                     }
                     break;
             }
-
         }
 
         return $r;
-
     }
 
     /**
@@ -178,10 +169,9 @@ class Subscription extends Collection implements ISubscription, IACL {
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->subscriptionInfo['principaluri'];
-
     }
 
     /**
@@ -196,8 +186,8 @@ class Subscription extends Collection implements ISubscription, IACL {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return [
             [
                 'privilege' => '{DAV:}all',
@@ -206,16 +196,14 @@ class Subscription extends Collection implements ISubscription, IACL {
             ],
             [
                 'privilege' => '{DAV:}all',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'principal' => $this->getOwner().'/calendar-proxy-write',
                 'protected' => true,
             ],
             [
                 'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'principal' => $this->getOwner().'/calendar-proxy-read',
                 'protected' => true,
-            ]
+            ],
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php
index 9669be304..0d53aeda3 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -25,8 +27,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarData implements XmlDeserializable {
-
+class CalendarData implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -46,24 +48,24 @@ class CalendarData implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
             'contentType' => $reader->getAttribute('content-type') ?: 'text/calendar',
-            'version'     => $reader->getAttribute('version') ?: '2.0',
+            'version' => $reader->getAttribute('version') ?: '2.0',
         ];
 
-        $elems = (array)$reader->parseInnerTree();
+        $elems = (array) $reader->parseInnerTree();
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-                case '{' . Plugin::NS_CALDAV . '}expand' :
+                case '{'.Plugin::NS_CALDAV.'}expand':
 
                     $result['expand'] = [
                         'start' => isset($elem['attributes']['start']) ? DateTimeParser::parseDateTime($elem['attributes']['start']) : null,
-                        'end'   => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
+                        'end' => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
                     ];
 
                     if (!$result['expand']['start'] || !$result['expand']['end']) {
@@ -74,11 +76,8 @@ class CalendarData implements XmlDeserializable {
                     }
                     break;
             }
-
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php
index c21ede66b..832346eea 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -22,8 +24,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CompFilter implements XmlDeserializable {
-
+class CompFilter implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -43,16 +45,17 @@ class CompFilter implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
+            'name' => null,
             'is-not-defined' => false,
-            'comp-filters'   => [],
-            'prop-filters'   => [],
-            'time-range'     => false,
+            'comp-filters' => [],
+            'prop-filters' => [],
+            'time-range' => false,
         ];
 
         $att = $reader->parseAttributes();
@@ -60,38 +63,34 @@ class CompFilter implements XmlDeserializable {
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALDAV . '}comp-filter' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CALDAV.'}comp-filter':
                     $result['comp-filters'][] = $elem['value'];
                     break;
-                case '{' . Plugin::NS_CALDAV . '}prop-filter' :
+                case '{'.Plugin::NS_CALDAV.'}prop-filter':
                     $result['prop-filters'][] = $elem['value'];
                     break;
-                case '{' . Plugin::NS_CALDAV . '}is-not-defined' :
+                case '{'.Plugin::NS_CALDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CALDAV . '}time-range' :
-                    if ($result['name'] === 'VCALENDAR') {
+                case '{'.Plugin::NS_CALDAV.'}time-range':
+                    if ('VCALENDAR' === $result['name']) {
                         throw new BadRequest('You cannot add time-range filters on the VCALENDAR component');
                     }
                     $result['time-range'] = [
                         'start' => isset($elem['attributes']['start']) ? DateTimeParser::parseDateTime($elem['attributes']['start']) : null,
-                        'end'   => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
+                        'end' => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
                     ];
                     if ($result['time-range']['start'] && $result['time-range']['end'] && $result['time-range']['end'] <= $result['time-range']['start']) {
                         throw new BadRequest('The end-date must be larger than the start-date');
                     }
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php
index bf422cf05..ec9ff753c 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -20,8 +22,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ParamFilter implements XmlDeserializable {
-
+class ParamFilter implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -41,14 +43,15 @@ class ParamFilter implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
+            'name' => null,
             'is-not-defined' => false,
-            'text-match'     => null,
+            'text-match' => null,
         ];
 
         $att = $reader->parseAttributes();
@@ -56,27 +59,23 @@ class ParamFilter implements XmlDeserializable {
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALDAV . '}is-not-defined' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CALDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CALDAV . '}text-match' :
+                case '{'.Plugin::NS_CALDAV.'}text-match':
                     $result['text-match'] = [
-                        'negate-condition' => isset($elem['attributes']['negate-condition']) && $elem['attributes']['negate-condition'] === 'yes',
-                        'collation'        => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
-                        'value'            => $elem['value'],
+                        'negate-condition' => isset($elem['attributes']['negate-condition']) && 'yes' === $elem['attributes']['negate-condition'],
+                        'collation' => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
+                        'value' => $elem['value'],
                     ];
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php
index db9207295..f4600574e 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -22,8 +24,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PropFilter implements XmlDeserializable {
-
+class PropFilter implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -43,16 +45,17 @@ class PropFilter implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
+            'name' => null,
             'is-not-defined' => false,
-            'param-filters'  => [],
-            'text-match'     => null,
-            'time-range'     => false,
+            'param-filters' => [],
+            'text-match' => null,
+            'time-range' => false,
         ];
 
         $att = $reader->parseAttributes();
@@ -60,39 +63,35 @@ class PropFilter implements XmlDeserializable {
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALDAV . '}param-filter' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CALDAV.'}param-filter':
                     $result['param-filters'][] = $elem['value'];
                     break;
-                case '{' . Plugin::NS_CALDAV . '}is-not-defined' :
+                case '{'.Plugin::NS_CALDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CALDAV . '}time-range' :
+                case '{'.Plugin::NS_CALDAV.'}time-range':
                     $result['time-range'] = [
                         'start' => isset($elem['attributes']['start']) ? DateTimeParser::parseDateTime($elem['attributes']['start']) : null,
-                        'end'   => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
+                        'end' => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
                     ];
                     if ($result['time-range']['start'] && $result['time-range']['end'] && $result['time-range']['end'] <= $result['time-range']['start']) {
                         throw new BadRequest('The end-date must be larger than the start-date');
                     }
                     break;
-                case '{' . Plugin::NS_CALDAV . '}text-match' :
+                case '{'.Plugin::NS_CALDAV.'}text-match':
                     $result['text-match'] = [
-                        'negate-condition' => isset($elem['attributes']['negate-condition']) && $elem['attributes']['negate-condition'] === 'yes',
-                        'collation'        => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
-                        'value'            => $elem['value'],
+                        'negate-condition' => isset($elem['attributes']['negate-condition']) && 'yes' === $elem['attributes']['negate-condition'],
+                        'collation' => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
+                        'value' => $elem['value'],
                     ];
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
index 92a9ac7b7..926656674 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\CalDAV;
@@ -17,19 +19,19 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Invite implements NotificationInterface {
-
+class Invite implements NotificationInterface
+{
     /**
-     * A unique id for the message
+     * A unique id for the message.
      *
      * @var string
      */
     protected $id;
 
     /**
-     * Timestamp of the notification
+     * Timestamp of the notification.
      *
-     * @var DateTime
+     * @var \DateTime
      */
     protected $dtStamp;
 
@@ -63,7 +65,7 @@ class Invite implements NotificationInterface {
     protected $hostUrl;
 
     /**
-     * Url to the sharer of the calendar
+     * Url to the sharer of the calendar.
      *
      * @var string
      */
@@ -91,21 +93,21 @@ class Invite implements NotificationInterface {
     protected $lastName;
 
     /**
-     * A description of the share request
+     * A description of the share request.
      *
      * @var string
      */
     protected $summary;
 
     /**
-     * The Etag for the notification
+     * The Etag for the notification.
      *
      * @var string
      */
     protected $etag;
 
     /**
-     * The list of supported components
+     * The list of supported components.
      *
      * @var CalDAV\Xml\Property\SupportedCalendarComponentSet
      */
@@ -138,8 +140,8 @@ class Invite implements NotificationInterface {
      *
      * @param array $values All the options
      */
-    function __construct(array $values) {
-
+    public function __construct(array $values)
+    {
         $required = [
             'id',
             'etag',
@@ -152,17 +154,16 @@ class Invite implements NotificationInterface {
         ];
         foreach ($required as $item) {
             if (!isset($values[$item])) {
-                throw new \InvalidArgumentException($item . ' is a required constructor option');
+                throw new \InvalidArgumentException($item.' is a required constructor option');
             }
         }
 
         foreach ($values as $key => $value) {
             if (!property_exists($this, $key)) {
-                throw new \InvalidArgumentException('Unknown option: ' . $key);
+                throw new \InvalidArgumentException('Unknown option: '.$key);
             }
             $this->$key = $value;
         }
-
     }
 
     /**
@@ -182,12 +183,10 @@ class Invite implements NotificationInterface {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $writer->writeElement('{' . CalDAV\Plugin::NS_CALENDARSERVER . '}invite-notification');
-
+    public function xmlSerialize(Writer $writer)
+    {
+        $writer->writeElement('{'.CalDAV\Plugin::NS_CALENDARSERVER.'}invite-notification');
     }
 
     /**
@@ -195,95 +194,90 @@ class Invite implements NotificationInterface {
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer) {
+    public function xmlSerializeFull(Writer $writer)
+    {
+        $cs = '{'.CalDAV\Plugin::NS_CALENDARSERVER.'}';
 
-        $cs = '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}';
+        $this->dtStamp->setTimezone(new \DateTimeZone('GMT'));
+        $writer->writeElement($cs.'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
 
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $writer->writeElement($cs . 'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
+        $writer->startElement($cs.'invite-notification');
 
-        $writer->startElement($cs . 'invite-notification');
-
-        $writer->writeElement($cs . 'uid', $this->id);
+        $writer->writeElement($cs.'uid', $this->id);
         $writer->writeElement('{DAV:}href', $this->href);
 
         switch ($this->type) {
-
-            case DAV\Sharing\Plugin::INVITE_ACCEPTED :
-                $writer->writeElement($cs . 'invite-accepted');
+            case DAV\Sharing\Plugin::INVITE_ACCEPTED:
+                $writer->writeElement($cs.'invite-accepted');
                 break;
-            case DAV\Sharing\Plugin::INVITE_NORESPONSE :
-                $writer->writeElement($cs . 'invite-noresponse');
+            case DAV\Sharing\Plugin::INVITE_NORESPONSE:
+                $writer->writeElement($cs.'invite-noresponse');
                 break;
-
         }
 
-        $writer->writeElement($cs . 'hosturl', [
-            '{DAV:}href' => $writer->contextUri . $this->hostUrl
+        $writer->writeElement($cs.'hosturl', [
+            '{DAV:}href' => $writer->contextUri.$this->hostUrl,
             ]);
 
         if ($this->summary) {
-            $writer->writeElement($cs . 'summary', $this->summary);
+            $writer->writeElement($cs.'summary', $this->summary);
         }
 
-        $writer->startElement($cs . 'access');
+        $writer->startElement($cs.'access');
         if ($this->readOnly) {
-            $writer->writeElement($cs . 'read');
+            $writer->writeElement($cs.'read');
         } else {
-            $writer->writeElement($cs . 'read-write');
+            $writer->writeElement($cs.'read-write');
         }
         $writer->endElement(); // access
 
-        $writer->startElement($cs . 'organizer');
+        $writer->startElement($cs.'organizer');
         // If the organizer contains a 'mailto:' part, it means it should be
         // treated as absolute.
-        if (strtolower(substr($this->organizer, 0, 7)) === 'mailto:') {
+        if ('mailto:' === strtolower(substr($this->organizer, 0, 7))) {
             $writer->writeElement('{DAV:}href', $this->organizer);
         } else {
-            $writer->writeElement('{DAV:}href', $writer->contextUri . $this->organizer);
+            $writer->writeElement('{DAV:}href', $writer->contextUri.$this->organizer);
         }
         if ($this->commonName) {
-            $writer->writeElement($cs . 'common-name', $this->commonName);
+            $writer->writeElement($cs.'common-name', $this->commonName);
         }
         if ($this->firstName) {
-            $writer->writeElement($cs . 'first-name', $this->firstName);
+            $writer->writeElement($cs.'first-name', $this->firstName);
         }
         if ($this->lastName) {
-            $writer->writeElement($cs . 'last-name', $this->lastName);
+            $writer->writeElement($cs.'last-name', $this->lastName);
         }
         $writer->endElement(); // organizer
 
         if ($this->commonName) {
-            $writer->writeElement($cs . 'organizer-cn', $this->commonName);
+            $writer->writeElement($cs.'organizer-cn', $this->commonName);
         }
         if ($this->firstName) {
-            $writer->writeElement($cs . 'organizer-first', $this->firstName);
+            $writer->writeElement($cs.'organizer-first', $this->firstName);
         }
         if ($this->lastName) {
-            $writer->writeElement($cs . 'organizer-last', $this->lastName);
+            $writer->writeElement($cs.'organizer-last', $this->lastName);
         }
         if ($this->supportedComponents) {
-            $writer->writeElement('{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set', $this->supportedComponents);
+            $writer->writeElement('{'.CalDAV\Plugin::NS_CALDAV.'}supported-calendar-component-set', $this->supportedComponents);
         }
 
         $writer->endElement(); // invite-notification
-
     }
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId() {
-
+    public function getId()
+    {
         return $this->id;
-
     }
 
     /**
@@ -293,10 +287,8 @@ class Invite implements NotificationInterface {
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return $this->etag;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
index f4b10a396..abcbde151 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\CalDAV;
@@ -14,19 +16,19 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InviteReply implements NotificationInterface {
-
+class InviteReply implements NotificationInterface
+{
     /**
-     * A unique id for the message
+     * A unique id for the message.
      *
      * @var string
      */
     protected $id;
 
     /**
-     * Timestamp of the notification
+     * Timestamp of the notification.
      *
-     * @var DateTime
+     * @var \DateTime
      */
     protected $dtStamp;
 
@@ -59,14 +61,14 @@ class InviteReply implements NotificationInterface {
     protected $hostUrl;
 
     /**
-     * A description of the share request
+     * A description of the share request.
      *
      * @var string
      */
     protected $summary;
 
     /**
-     * Notification Etag
+     * Notification Etag.
      *
      * @var string
      */
@@ -90,8 +92,8 @@ class InviteReply implements NotificationInterface {
      *
      * @param array $values
      */
-    function __construct(array $values) {
-
+    public function __construct(array $values)
+    {
         $required = [
             'id',
             'etag',
@@ -103,17 +105,16 @@ class InviteReply implements NotificationInterface {
         ];
         foreach ($required as $item) {
             if (!isset($values[$item])) {
-                throw new \InvalidArgumentException($item . ' is a required constructor option');
+                throw new \InvalidArgumentException($item.' is a required constructor option');
             }
         }
 
         foreach ($values as $key => $value) {
             if (!property_exists($this, $key)) {
-                throw new \InvalidArgumentException('Unknown option: ' . $key);
+                throw new \InvalidArgumentException('Unknown option: '.$key);
             }
             $this->$key = $value;
         }
-
     }
 
     /**
@@ -133,12 +134,10 @@ class InviteReply implements NotificationInterface {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $writer->writeElement('{' . CalDAV\Plugin::NS_CALENDARSERVER . '}invite-reply');
-
+    public function xmlSerialize(Writer $writer)
+    {
+        $writer->writeElement('{'.CalDAV\Plugin::NS_CALENDARSERVER.'}invite-reply');
     }
 
     /**
@@ -146,55 +145,50 @@ class InviteReply implements NotificationInterface {
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer) {
+    public function xmlSerializeFull(Writer $writer)
+    {
+        $cs = '{'.CalDAV\Plugin::NS_CALENDARSERVER.'}';
 
-        $cs = '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}';
+        $this->dtStamp->setTimezone(new \DateTimeZone('GMT'));
+        $writer->writeElement($cs.'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
 
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $writer->writeElement($cs . 'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
+        $writer->startElement($cs.'invite-reply');
 
-        $writer->startElement($cs . 'invite-reply');
-
-        $writer->writeElement($cs . 'uid', $this->id);
-        $writer->writeElement($cs . 'in-reply-to', $this->inReplyTo);
+        $writer->writeElement($cs.'uid', $this->id);
+        $writer->writeElement($cs.'in-reply-to', $this->inReplyTo);
         $writer->writeElement('{DAV:}href', $this->href);
 
         switch ($this->type) {
-
-            case DAV\Sharing\Plugin::INVITE_ACCEPTED :
-                $writer->writeElement($cs . 'invite-accepted');
+            case DAV\Sharing\Plugin::INVITE_ACCEPTED:
+                $writer->writeElement($cs.'invite-accepted');
                 break;
-            case DAV\Sharing\Plugin::INVITE_DECLINED :
-                $writer->writeElement($cs . 'invite-declined');
+            case DAV\Sharing\Plugin::INVITE_DECLINED:
+                $writer->writeElement($cs.'invite-declined');
                 break;
-
         }
 
-        $writer->writeElement($cs . 'hosturl', [
-            '{DAV:}href' => $writer->contextUri . $this->hostUrl
+        $writer->writeElement($cs.'hosturl', [
+            '{DAV:}href' => $writer->contextUri.$this->hostUrl,
             ]);
 
         if ($this->summary) {
-            $writer->writeElement($cs . 'summary', $this->summary);
+            $writer->writeElement($cs.'summary', $this->summary);
         }
         $writer->endElement(); // invite-reply
-
     }
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId() {
-
+    public function getId()
+    {
         return $this->id;
-
     }
 
     /**
@@ -204,10 +198,8 @@ class InviteReply implements NotificationInterface {
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return $this->etag;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php
index b98f9c888..be7490533 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\Xml\Writer;
@@ -12,26 +14,25 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface NotificationInterface extends XmlSerializable {
-
+interface NotificationInterface extends XmlSerializable
+{
     /**
      * This method serializes the entire notification, as it is used in the
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer);
+    public function xmlSerializeFull(Writer $writer);
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId();
+    public function getId();
 
     /**
      * Returns the ETag for this notification.
@@ -40,6 +41,5 @@ interface NotificationInterface extends XmlSerializable {
      *
      * @return string
      */
-    function getETag();
-
+    public function getETag();
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php
index 8c945dd68..3c656df34 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\CalDAV\Plugin;
 use Sabre\Xml\Writer;
 
 /**
- * SystemStatus notification
+ * SystemStatus notification.
  *
  * This notification can be used to indicate to the user that the system is
  * down.
@@ -15,14 +17,14 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SystemStatus implements NotificationInterface {
-
+class SystemStatus implements NotificationInterface
+{
     const TYPE_LOW = 1;
     const TYPE_MEDIUM = 2;
     const TYPE_HIGH = 3;
 
     /**
-     * A unique id
+     * A unique id.
      *
      * @var string
      */
@@ -50,7 +52,7 @@ class SystemStatus implements NotificationInterface {
     protected $href;
 
     /**
-     * Notification Etag
+     * Notification Etag.
      *
      * @var string
      */
@@ -64,18 +66,17 @@ class SystemStatus implements NotificationInterface {
      *
      * @param string $id
      * @param string $etag
-     * @param int $type
+     * @param int    $type
      * @param string $description
      * @param string $href
      */
-    function __construct($id, $etag, $type = self::TYPE_HIGH, $description = null, $href = null) {
-
+    public function __construct($id, $etag, $type = self::TYPE_HIGH, $description = null, $href = null)
+    {
         $this->id = $id;
         $this->type = $type;
         $this->description = $description;
         $this->href = $href;
         $this->etag = $etag;
-
     }
 
     /**
@@ -91,27 +92,25 @@ class SystemStatus implements NotificationInterface {
      * responsible for closing them.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         switch ($this->type) {
-            case self::TYPE_LOW :
+            case self::TYPE_LOW:
                 $type = 'low';
                 break;
-            case self::TYPE_MEDIUM :
+            case self::TYPE_MEDIUM:
                 $type = 'medium';
                 break;
-            default :
-            case self::TYPE_HIGH :
+            default:
+            case self::TYPE_HIGH:
                 $type = 'high';
                 break;
         }
 
-        $writer->startElement('{' . Plugin::NS_CALENDARSERVER . '}systemstatus');
+        $writer->startElement('{'.Plugin::NS_CALENDARSERVER.'}systemstatus');
         $writer->writeAttribute('type', $type);
         $writer->endElement();
-
     }
 
     /**
@@ -119,51 +118,47 @@ class SystemStatus implements NotificationInterface {
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer) {
-
-        $cs = '{' . Plugin::NS_CALENDARSERVER . '}';
+    public function xmlSerializeFull(Writer $writer)
+    {
+        $cs = '{'.Plugin::NS_CALENDARSERVER.'}';
         switch ($this->type) {
-            case self::TYPE_LOW :
+            case self::TYPE_LOW:
                 $type = 'low';
                 break;
-            case self::TYPE_MEDIUM :
+            case self::TYPE_MEDIUM:
                 $type = 'medium';
                 break;
-            default :
-            case self::TYPE_HIGH :
+            default:
+            case self::TYPE_HIGH:
                 $type = 'high';
                 break;
         }
 
-        $writer->startElement($cs . 'systemstatus');
+        $writer->startElement($cs.'systemstatus');
         $writer->writeAttribute('type', $type);
 
-
         if ($this->description) {
-            $writer->writeElement($cs . 'description', $this->description);
+            $writer->writeElement($cs.'description', $this->description);
         }
         if ($this->href) {
             $writer->writeElement('{DAV:}href', $this->href);
         }
 
         $writer->endElement(); // systemstatus
-
     }
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId() {
-
+    public function getId()
+    {
         return $this->id;
-
     }
 
     /*
@@ -173,10 +168,8 @@ class SystemStatus implements NotificationInterface {
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return $this->etag;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php
index 54e5a116a..224f52c96 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -7,7 +9,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * AllowedSharingModes
+ * AllowedSharingModes.
  *
  * This property encodes the 'allowed-sharing-modes' property, as defined by
  * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
@@ -18,14 +20,15 @@ use Sabre\Xml\XmlSerializable;
  * such as VEVENT, VTODO
  *
  * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
+ *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AllowedSharingModes implements XmlSerializable {
-
+class AllowedSharingModes implements XmlSerializable
+{
     /**
-     * Whether or not a calendar can be shared with another user
+     * Whether or not a calendar can be shared with another user.
      *
      * @var bool
      */
@@ -39,17 +42,15 @@ class AllowedSharingModes implements XmlSerializable {
     protected $canBePublished;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param bool $canBeShared
      * @param bool $canBePublished
-     * @return void
      */
-    function __construct($canBeShared, $canBePublished) {
-
+    public function __construct($canBeShared, $canBePublished)
+    {
         $this->canBeShared = $canBeShared;
         $this->canBePublished = $canBePublished;
-
     }
 
     /**
@@ -69,19 +70,14 @@ class AllowedSharingModes implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         if ($this->canBeShared) {
-            $writer->writeElement('{' . Plugin::NS_CALENDARSERVER . '}can-be-shared');
+            $writer->writeElement('{'.Plugin::NS_CALENDARSERVER.'}can-be-shared');
         }
         if ($this->canBePublished) {
-            $writer->writeElement('{' . Plugin::NS_CALENDARSERVER . '}can-be-published');
+            $writer->writeElement('{'.Plugin::NS_CALENDARSERVER.'}can-be-published');
         }
-
     }
-
-
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php
index fc6f1d505..6b28d5df2 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * email-address-set property
+ * email-address-set property.
  *
  * This property represents the email-address-set property in the
  * http://calendarserver.org/ns/ namespace.
@@ -17,35 +19,33 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class EmailAddressSet implements XmlSerializable {
-
+class EmailAddressSet implements XmlSerializable
+{
     /**
-     * emails
+     * emails.
      *
      * @var array
      */
     private $emails;
 
     /**
-     * __construct
+     * __construct.
      *
      * @param array $emails
      */
-    function __construct(array $emails) {
-
+    public function __construct(array $emails)
+    {
         $this->emails = $emails;
-
     }
 
     /**
-     * Returns the email addresses
+     * Returns the email addresses.
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->emails;
-
     }
 
     /**
@@ -65,16 +65,11 @@ class EmailAddressSet implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->emails as $email) {
-
             $writer->writeElement('{http://calendarserver.org/ns/}email-address', $email);
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
index 4f33c464c..db456617c 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -9,19 +11,20 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * Invite property
+ * Invite property.
  *
  * This property encodes the 'invite' property, as defined by
  * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
  * namespace.
  *
  * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
+ *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Invite implements XmlSerializable {
-
+class Invite implements XmlSerializable
+{
     /**
      * The list of users a calendar has been shared to.
      *
@@ -34,10 +37,9 @@ class Invite implements XmlSerializable {
      *
      * @param Sharee[] $sharees
      */
-    function __construct(array $sharees) {
-
+    public function __construct(array $sharees)
+    {
         $this->sharees = $sharees;
-
     }
 
     /**
@@ -45,10 +47,9 @@ class Invite implements XmlSerializable {
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->sharees;
-
     }
 
     /**
@@ -68,61 +69,54 @@ class Invite implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $cs = '{' . Plugin::NS_CALENDARSERVER . '}';
+    public function xmlSerialize(Writer $writer)
+    {
+        $cs = '{'.Plugin::NS_CALENDARSERVER.'}';
 
         foreach ($this->sharees as $sharee) {
-
-            if ($sharee->access === DAV\Sharing\Plugin::ACCESS_SHAREDOWNER) {
-                $writer->startElement($cs . 'organizer');
+            if (DAV\Sharing\Plugin::ACCESS_SHAREDOWNER === $sharee->access) {
+                $writer->startElement($cs.'organizer');
             } else {
-                $writer->startElement($cs . 'user');
+                $writer->startElement($cs.'user');
 
                 switch ($sharee->inviteStatus) {
-                    case DAV\Sharing\Plugin::INVITE_ACCEPTED :
-                        $writer->writeElement($cs . 'invite-accepted');
+                    case DAV\Sharing\Plugin::INVITE_ACCEPTED:
+                        $writer->writeElement($cs.'invite-accepted');
                         break;
-                    case DAV\Sharing\Plugin::INVITE_DECLINED :
-                        $writer->writeElement($cs . 'invite-declined');
+                    case DAV\Sharing\Plugin::INVITE_DECLINED:
+                        $writer->writeElement($cs.'invite-declined');
                         break;
-                    case DAV\Sharing\Plugin::INVITE_NORESPONSE :
-                        $writer->writeElement($cs . 'invite-noresponse');
+                    case DAV\Sharing\Plugin::INVITE_NORESPONSE:
+                        $writer->writeElement($cs.'invite-noresponse');
                         break;
-                    case DAV\Sharing\Plugin::INVITE_INVALID :
-                        $writer->writeElement($cs . 'invite-invalid');
+                    case DAV\Sharing\Plugin::INVITE_INVALID:
+                        $writer->writeElement($cs.'invite-invalid');
                         break;
                 }
 
-                $writer->startElement($cs . 'access');
+                $writer->startElement($cs.'access');
                 switch ($sharee->access) {
-                    case DAV\Sharing\Plugin::ACCESS_READWRITE :
-                        $writer->writeElement($cs . 'read-write');
+                    case DAV\Sharing\Plugin::ACCESS_READWRITE:
+                        $writer->writeElement($cs.'read-write');
                         break;
-                    case DAV\Sharing\Plugin::ACCESS_READ :
-                        $writer->writeElement($cs . 'read');
+                    case DAV\Sharing\Plugin::ACCESS_READ:
+                        $writer->writeElement($cs.'read');
                         break;
-
                 }
                 $writer->endElement(); // access
-
             }
 
             $href = new DAV\Xml\Property\Href($sharee->href);
             $href->xmlSerialize($writer);
 
             if (isset($sharee->properties['{DAV:}displayname'])) {
-                $writer->writeElement($cs . 'common-name', $sharee->properties['{DAV:}displayname']);
+                $writer->writeElement($cs.'common-name', $sharee->properties['{DAV:}displayname']);
             }
             if ($sharee->comment) {
-                $writer->writeElement($cs . 'summary', $sharee->comment);
+                $writer->writeElement($cs.'summary', $sharee->comment);
             }
             $writer->endElement(); // organizer or user
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
index 10c20be55..780907169 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -24,41 +26,39 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ScheduleCalendarTransp implements Element {
-
+class ScheduleCalendarTransp implements Element
+{
     const TRANSPARENT = 'transparent';
     const OPAQUE = 'opaque';
 
     /**
-     * value
+     * value.
      *
      * @var string
      */
     protected $value;
 
     /**
-     * Creates the property
+     * Creates the property.
      *
      * @param string $value
      */
-    function __construct($value) {
-
-        if ($value !== self::TRANSPARENT && $value !== self::OPAQUE) {
+    public function __construct($value)
+    {
+        if (self::TRANSPARENT !== $value && self::OPAQUE !== $value) {
             throw new \InvalidArgumentException('The value must either be specified as "transparent" or "opaque"');
         }
         $this->value = $value;
-
     }
 
     /**
-     * Returns the current value
+     * Returns the current value.
      *
      * @return string
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->value;
-
     }
 
     /**
@@ -78,19 +78,17 @@ class ScheduleCalendarTransp implements Element {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         switch ($this->value) {
-            case self::TRANSPARENT :
-                $writer->writeElement('{' . Plugin::NS_CALDAV . '}transparent');
+            case self::TRANSPARENT:
+                $writer->writeElement('{'.Plugin::NS_CALDAV.'}transparent');
                 break;
-            case self::OPAQUE :
-                $writer->writeElement('{' . Plugin::NS_CALDAV . '}opaque');
+            case self::OPAQUE:
+                $writer->writeElement('{'.Plugin::NS_CALDAV.'}opaque');
                 break;
         }
-
     }
 
     /**
@@ -112,10 +110,11 @@ class ScheduleCalendarTransp implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = Deserializer\enum($reader, Plugin::NS_CALDAV);
 
         if (in_array('transparent', $elems)) {
@@ -123,8 +122,7 @@ class ScheduleCalendarTransp implements Element {
         } else {
             $value = self::OPAQUE;
         }
-        return new self($value);
 
+        return new self($value);
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php
index 7fc25c5f0..56fa61b13 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -21,8 +23,8 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedCalendarComponentSet implements Element {
-
+class SupportedCalendarComponentSet implements Element
+{
     /**
      * List of supported components.
      *
@@ -37,21 +39,19 @@ class SupportedCalendarComponentSet implements Element {
      *
      * @param array $components
      */
-    function __construct(array $components) {
-
+    public function __construct(array $components)
+    {
         $this->components = $components;
-
     }
 
     /**
-     * Returns the list of supported components
+     * Returns the list of supported components.
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->components;
-
     }
 
     /**
@@ -71,18 +71,14 @@ class SupportedCalendarComponentSet implements Element {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->components as $component) {
-
-            $writer->startElement('{' . Plugin::NS_CALDAV . '}comp');
+            $writer->startElement('{'.Plugin::NS_CALDAV.'}comp');
             $writer->writeAttributes(['name' => $component]);
             $writer->endElement();
-
         }
-
     }
 
     /**
@@ -104,16 +100,17 @@ class SupportedCalendarComponentSet implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree();
 
         $components = [];
 
-        foreach ((array)$elems as $elem) {
-            if ($elem['name'] === '{' . Plugin::NS_CALDAV . '}comp') {
+        foreach ((array) $elems as $elem) {
+            if ($elem['name'] === '{'.Plugin::NS_CALDAV.'}comp') {
                 $components[] = $elem['attributes']['name'];
             }
         }
@@ -123,7 +120,5 @@ class SupportedCalendarComponentSet implements Element {
         }
 
         return new self($components);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php
index d123ba4c0..1c9c4779f 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -7,7 +9,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * Supported-calendar-data property
+ * Supported-calendar-data property.
  *
  * This property is a representation of the supported-calendar-data property
  * in the CalDAV namespace. SabreDAV only has support for text/calendar;2.0
@@ -20,8 +22,8 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedCalendarData implements XmlSerializable {
-
+class SupportedCalendarData implements XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -39,22 +41,19 @@ class SupportedCalendarData implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $writer->startElement('{' . Plugin::NS_CALDAV . '}calendar-data');
+    public function xmlSerialize(Writer $writer)
+    {
+        $writer->startElement('{'.Plugin::NS_CALDAV.'}calendar-data');
         $writer->writeAttributes([
             'content-type' => 'text/calendar',
-            'version'      => '2.0',
+            'version' => '2.0',
         ]);
         $writer->endElement(); // calendar-data
-        $writer->startElement('{' . Plugin::NS_CALDAV . '}calendar-data');
+        $writer->startElement('{'.Plugin::NS_CALDAV.'}calendar-data');
         $writer->writeAttributes([
             'content-type' => 'application/calendar+json',
         ]);
         $writer->endElement(); // calendar-data
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php
index af10860d0..b88cd0d92 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -7,7 +9,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * supported-collation-set property
+ * supported-collation-set property.
  *
  * This property is a representation of the supported-collation-set property
  * in the CalDAV namespace.
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedCollationSet implements XmlSerializable {
-
+class SupportedCollationSet implements XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -38,20 +40,17 @@ class SupportedCollationSet implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         $collations = [
             'i;ascii-casemap',
             'i;octet',
-            'i;unicode-casemap'
+            'i;unicode-casemap',
         ];
 
         foreach ($collations as $collation) {
-            $writer->writeElement('{' . Plugin::NS_CALDAV . '}supported-collation', $collation);
+            $writer->writeElement('{'.Plugin::NS_CALDAV.'}supported-collation', $collation);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php
index 6d3c5d508..8231de6bd 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarMultiGetReport implements XmlDeserializable {
-
+class CalendarMultiGetReport implements XmlDeserializable
+{
     /**
      * An array with requested properties.
      *
@@ -80,36 +82,33 @@ class CalendarMultiGetReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree([
             '{urn:ietf:params:xml:ns:caldav}calendar-data' => 'Sabre\\CalDAV\\Xml\\Filter\\CalendarData',
-            '{DAV:}prop'                                   => 'Sabre\\Xml\\Element\\KeyValue',
+            '{DAV:}prop' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $newProps = [
-            'hrefs'      => [],
+            'hrefs' => [],
             'properties' => [],
         ];
 
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $newProps['properties'] = array_keys($elem['value']);
-                    if (isset($elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'])) {
-                        $newProps += $elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'];
+                    if (isset($elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'])) {
+                        $newProps += $elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'];
                     }
                     break;
-                case '{DAV:}href' :
+                case '{DAV:}href':
                     $newProps['hrefs'][] = Uri\resolve($reader->contextUri, $elem['value']);
                     break;
-
             }
-
         }
 
         $obj = new self();
@@ -118,7 +117,5 @@ class CalendarMultiGetReport implements XmlDeserializable {
         }
 
         return $obj;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php
index e0b1c7950..e85eccd2d 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarQueryReport implements XmlDeserializable {
-
+class CalendarQueryReport implements XmlDeserializable
+{
     /**
      * An array with requested properties.
      *
@@ -80,38 +82,39 @@ class CalendarQueryReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree([
-            '{urn:ietf:params:xml:ns:caldav}comp-filter'   => 'Sabre\\CalDAV\\Xml\\Filter\\CompFilter',
-            '{urn:ietf:params:xml:ns:caldav}prop-filter'   => 'Sabre\\CalDAV\\Xml\\Filter\\PropFilter',
-            '{urn:ietf:params:xml:ns:caldav}param-filter'  => 'Sabre\\CalDAV\\Xml\\Filter\\ParamFilter',
+            '{urn:ietf:params:xml:ns:caldav}comp-filter' => 'Sabre\\CalDAV\\Xml\\Filter\\CompFilter',
+            '{urn:ietf:params:xml:ns:caldav}prop-filter' => 'Sabre\\CalDAV\\Xml\\Filter\\PropFilter',
+            '{urn:ietf:params:xml:ns:caldav}param-filter' => 'Sabre\\CalDAV\\Xml\\Filter\\ParamFilter',
             '{urn:ietf:params:xml:ns:caldav}calendar-data' => 'Sabre\\CalDAV\\Xml\\Filter\\CalendarData',
-            '{DAV:}prop'                                   => 'Sabre\\Xml\\Element\\KeyValue',
+            '{DAV:}prop' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $newProps = [
-            'filters'    => null,
+            'filters' => null,
             'properties' => [],
         ];
 
-        if (!is_array($elems)) $elems = [];
+        if (!is_array($elems)) {
+            $elems = [];
+        }
 
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $newProps['properties'] = array_keys($elem['value']);
-                    if (isset($elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'])) {
-                        $newProps += $elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'];
+                    if (isset($elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'])) {
+                        $newProps += $elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'];
                     }
                     break;
-                case '{' . Plugin::NS_CALDAV . '}filter' :
+                case '{'.Plugin::NS_CALDAV.'}filter':
                     foreach ($elem['value'] as $subElem) {
-                        if ($subElem['name'] === '{' . Plugin::NS_CALDAV . '}comp-filter') {
+                        if ($subElem['name'] === '{'.Plugin::NS_CALDAV.'}comp-filter') {
                             if (!is_null($newProps['filters'])) {
                                 throw new BadRequest('Only one top-level comp-filter may be defined');
                             }
@@ -119,21 +122,18 @@ class CalendarQueryReport implements XmlDeserializable {
                         }
                     }
                     break;
-
             }
-
         }
 
         if (is_null($newProps['filters'])) {
-            throw new BadRequest('The {' . Plugin::NS_CALDAV . '}filter element is required for this request');
+            throw new BadRequest('The {'.Plugin::NS_CALDAV.'}filter element is required for this request');
         }
 
         $obj = new self();
         foreach ($newProps as $key => $value) {
             $obj->$key = $value;
         }
-        return $obj;
 
+        return $obj;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php
index 0f6c1e074..a4d98a8d4 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -9,7 +11,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 /**
- * FreeBusyQueryReport
+ * FreeBusyQueryReport.
  *
  * This class parses the {DAV:}free-busy-query REPORT, as defined in:
  *
@@ -19,19 +21,19 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class FreeBusyQueryReport implements XmlDeserializable {
-
+class FreeBusyQueryReport implements XmlDeserializable
+{
     /**
-     * Starttime of report
+     * Starttime of report.
      *
-     * @var DateTime|null
+     * @var \DateTime|null
      */
     public $start;
 
     /**
-     * End time of report
+     * End time of report.
      *
-     * @var DateTime|null
+     * @var \DateTime|null
      */
     public $end;
 
@@ -54,22 +56,23 @@ class FreeBusyQueryReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
-        $timeRange = '{' . Plugin::NS_CALDAV . '}time-range';
+    public static function xmlDeserialize(Reader $reader)
+    {
+        $timeRange = '{'.Plugin::NS_CALDAV.'}time-range';
 
         $start = null;
         $end = null;
 
-        foreach ((array)$reader->parseInnerTree([]) as $elem) {
-
-            if ($elem['name'] !== $timeRange) continue;
+        foreach ((array) $reader->parseInnerTree([]) as $elem) {
+            if ($elem['name'] !== $timeRange) {
+                continue;
+            }
 
             $start = empty($elem['attributes']['start']) ?: $elem['attributes']['start'];
             $end = empty($elem['attributes']['end']) ?: $elem['attributes']['end'];
-
         }
         if (!$start && !$end) {
             throw new BadRequest('The freebusy report must have a time-range element');
@@ -85,7 +88,5 @@ class FreeBusyQueryReport implements XmlDeserializable {
         $result->end = $end;
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
index db32cc6a5..710095bb2 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -11,7 +13,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 /**
- * Invite-reply POST request parser
+ * Invite-reply POST request parser.
  *
  * This class parses the invite-reply POST request, as defined in:
  *
@@ -21,8 +23,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InviteReply implements XmlDeserializable {
-
+class InviteReply implements XmlDeserializable
+{
     /**
      * The sharee calendar user address.
      *
@@ -40,14 +42,14 @@ class InviteReply implements XmlDeserializable {
     public $calendarUri;
 
     /**
-     * The id of the invite message that's being responded to
+     * The id of the invite message that's being responded to.
      *
      * @var string
      */
     public $inReplyTo;
 
     /**
-     * An optional message
+     * An optional message.
      *
      * @var string
      */
@@ -61,22 +63,21 @@ class InviteReply implements XmlDeserializable {
     public $status;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param string $href
      * @param string $calendarUri
      * @param string $inReplyTo
      * @param string $summary
-     * @param int $status
+     * @param int    $status
      */
-    function __construct($href, $calendarUri, $inReplyTo, $summary, $status) {
-
+    public function __construct($href, $calendarUri, $inReplyTo, $summary, $status)
+    {
         $this->href = $href;
         $this->calendarUri = $calendarUri;
         $this->inReplyTo = $inReplyTo;
         $this->summary = $summary;
         $this->status = $status;
-
     }
 
     /**
@@ -98,10 +99,11 @@ class InviteReply implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = KeyValue::xmlDeserialize($reader);
 
         $href = null;
@@ -111,40 +113,35 @@ class InviteReply implements XmlDeserializable {
         $status = null;
 
         foreach ($elems as $name => $value) {
-
             switch ($name) {
-
-                case '{' . Plugin::NS_CALENDARSERVER . '}hosturl' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}hosturl':
                     foreach ($value as $bla) {
-                        if ($bla['name'] === '{DAV:}href') {
+                        if ('{DAV:}href' === $bla['name']) {
                             $calendarUri = $bla['value'];
                         }
                     }
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}invite-accepted' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}invite-accepted':
                     $status = DAV\Sharing\Plugin::INVITE_ACCEPTED;
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}invite-declined' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}invite-declined':
                     $status = DAV\Sharing\Plugin::INVITE_DECLINED;
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}in-reply-to' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}in-reply-to':
                     $inReplyTo = $value;
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}summary' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}summary':
                     $summary = $value;
                     break;
-                case '{DAV:}href' :
+                case '{DAV:}href':
                     $href = $value;
                     break;
             }
-
         }
         if (is_null($calendarUri)) {
             throw new BadRequest('The {http://calendarserver.org/ns/}hosturl/{DAV:}href element must exist');
         }
 
         return new self($href, $calendarUri, $inReplyTo, $summary, $status);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php
index ce7fafde9..7cad98da5 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\Xml\Reader;
@@ -16,8 +18,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MkCalendar implements XmlDeserializable {
-
+class MkCalendar implements XmlDeserializable
+{
     /**
      * The list of properties that will be set.
      *
@@ -30,10 +32,9 @@ class MkCalendar implements XmlDeserializable {
      *
      * @return array
      */
-    function getProperties() {
-
+    public function getProperties()
+    {
         return $this->properties;
-
     }
 
     /**
@@ -55,10 +56,11 @@ class MkCalendar implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $self = new self();
 
         $elementMap = $reader->elementMap;
@@ -67,13 +69,11 @@ class MkCalendar implements XmlDeserializable {
         $elems = $reader->parseInnerTree($elementMap);
 
         foreach ($elems as $elem) {
-            if ($elem['name'] === '{DAV:}set') {
+            if ('{DAV:}set' === $elem['name']) {
                 $self->properties = array_merge($self->properties, $elem['value']['{DAV:}prop']);
             }
         }
 
         return $self;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
index e0bd8e0af..60bd579d5 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -8,7 +10,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 /**
- * Share POST request parser
+ * Share POST request parser.
  *
  * This class parses the share POST request, as defined in:
  *
@@ -18,8 +20,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Share implements XmlDeserializable {
-
+class Share implements XmlDeserializable
+{
     /**
      * The list of new people added or updated or removed from the share.
      *
@@ -28,14 +30,13 @@ class Share implements XmlDeserializable {
     public $sharees = [];
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Sharee[] $sharees
      */
-    function __construct(array $sharees) {
-
+    public function __construct(array $sharees)
+    {
         $this->sharees = $sharees;
-
     }
 
     /**
@@ -57,55 +58,52 @@ class Share implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseGetElements([
-            '{' . Plugin::NS_CALENDARSERVER . '}set'    => 'Sabre\\Xml\\Element\\KeyValue',
-            '{' . Plugin::NS_CALENDARSERVER . '}remove' => 'Sabre\\Xml\\Element\\KeyValue',
+            '{'.Plugin::NS_CALENDARSERVER.'}set' => 'Sabre\\Xml\\Element\\KeyValue',
+            '{'.Plugin::NS_CALENDARSERVER.'}remove' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $sharees = [];
 
         foreach ($elems as $elem) {
             switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALENDARSERVER . '}set' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}set':
                     $sharee = $elem['value'];
 
-                    $sumElem = '{' . Plugin::NS_CALENDARSERVER . '}summary';
-                    $commonName = '{' . Plugin::NS_CALENDARSERVER . '}common-name';
+                    $sumElem = '{'.Plugin::NS_CALENDARSERVER.'}summary';
+                    $commonName = '{'.Plugin::NS_CALENDARSERVER.'}common-name';
 
                     $properties = [];
                     if (isset($sharee[$commonName])) {
                         $properties['{DAV:}displayname'] = $sharee[$commonName];
                     }
 
-                    $access = array_key_exists('{' . Plugin::NS_CALENDARSERVER . '}read-write', $sharee)
+                    $access = array_key_exists('{'.Plugin::NS_CALENDARSERVER.'}read-write', $sharee)
                         ? \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE
                         : \Sabre\DAV\Sharing\Plugin::ACCESS_READ;
 
                     $sharees[] = new Sharee([
-                        'href'       => $sharee['{DAV:}href'],
+                        'href' => $sharee['{DAV:}href'],
                         'properties' => $properties,
-                        'access'     => $access,
-                        'comment'    => isset($sharee[$sumElem]) ? $sharee[$sumElem] : null
+                        'access' => $access,
+                        'comment' => isset($sharee[$sumElem]) ? $sharee[$sumElem] : null,
                     ]);
                     break;
 
-                case '{' . Plugin::NS_CALENDARSERVER . '}remove' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}remove':
                     $sharees[] = new Sharee([
-                        'href'   => $elem['value']['{DAV:}href'],
-                        'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS
+                        'href' => $elem['value']['{DAV:}href'],
+                        'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS,
                     ]);
                     break;
-
             }
         }
 
         return new self($sharees);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/AddressBook.php b/vendor/sabre/dav/lib/CardDAV/AddressBook.php
index c9d28a091..434801554 100644
--- a/vendor/sabre/dav/lib/CardDAV/AddressBook.php
+++ b/vendor/sabre/dav/lib/CardDAV/AddressBook.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 use Sabre\DAVACL;
 
 /**
- * The AddressBook class represents a CardDAV addressbook, owned by a specific user
+ * The AddressBook class represents a CardDAV addressbook, owned by a specific user.
  *
  * The AddressBook can contain multiple vcards
  *
@@ -14,77 +16,78 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AddressBook extends DAV\Collection implements IAddressBook, DAV\IProperties, DAVACL\IACL, DAV\Sync\ISyncCollection, DAV\IMultiGet {
-
+class AddressBook extends DAV\Collection implements IAddressBook, DAV\IProperties, DAVACL\IACL, DAV\Sync\ISyncCollection, DAV\IMultiGet
+{
     use DAVACL\ACLTrait;
 
     /**
-     * This is an array with addressbook information
+     * This is an array with addressbook information.
      *
      * @var array
      */
     protected $addressBookInfo;
 
     /**
-     * CardDAV backend
+     * CardDAV backend.
      *
      * @var Backend\BackendInterface
      */
     protected $carddavBackend;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Backend\BackendInterface $carddavBackend
-     * @param array $addressBookInfo
+     * @param array                    $addressBookInfo
      */
-    function __construct(Backend\BackendInterface $carddavBackend, array $addressBookInfo) {
-
+    public function __construct(Backend\BackendInterface $carddavBackend, array $addressBookInfo)
+    {
         $this->carddavBackend = $carddavBackend;
         $this->addressBookInfo = $addressBookInfo;
-
     }
 
     /**
-     * Returns the name of the addressbook
+     * Returns the name of the addressbook.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->addressBookInfo['uri'];
-
     }
 
     /**
-     * Returns a card
+     * Returns a card.
      *
      * @param string $name
+     *
      * @return Card
      */
-    function getChild($name) {
-
+    public function getChild($name)
+    {
         $obj = $this->carddavBackend->getCard($this->addressBookInfo['id'], $name);
-        if (!$obj) throw new DAV\Exception\NotFound('Card not found');
-        return new Card($this->carddavBackend, $this->addressBookInfo, $obj);
+        if (!$obj) {
+            throw new DAV\Exception\NotFound('Card not found');
+        }
 
+        return new Card($this->carddavBackend, $this->addressBookInfo, $obj);
     }
 
     /**
-     * Returns the full list of cards
+     * Returns the full list of cards.
      *
      * @return array
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $objs = $this->carddavBackend->getCards($this->addressBookInfo['id']);
         $children = [];
         foreach ($objs as $obj) {
             $obj['acl'] = $this->getChildACL();
             $children[] = new Card($this->carddavBackend, $this->addressBookInfo, $obj);
         }
-        return $children;
 
+        return $children;
     }
 
     /**
@@ -94,47 +97,47 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
      * If any children are not found, you do not have to return them.
      *
      * @param string[] $paths
+     *
      * @return array
      */
-    function getMultipleChildren(array $paths) {
-
+    public function getMultipleChildren(array $paths)
+    {
         $objs = $this->carddavBackend->getMultipleCards($this->addressBookInfo['id'], $paths);
         $children = [];
         foreach ($objs as $obj) {
             $obj['acl'] = $this->getChildACL();
             $children[] = new Card($this->carddavBackend, $this->addressBookInfo, $obj);
         }
-        return $children;
 
+        return $children;
     }
 
     /**
-     * Creates a new directory
+     * Creates a new directory.
      *
      * We actually block this, as subdirectories are not allowed in addressbooks.
      *
      * @param string $name
-     * @return void
      */
-    function createDirectory($name) {
-
+    public function createDirectory($name)
+    {
         throw new DAV\Exception\MethodNotAllowed('Creating collections in addressbooks is not allowed');
-
     }
 
     /**
-     * Creates a new file
+     * Creates a new file.
      *
      * The contents of the new file must be a valid VCARD.
      *
      * This method may return an ETag.
      *
-     * @param string $name
+     * @param string   $name
      * @param resource $vcardData
+     *
      * @return string|null
      */
-    function createFile($name, $vcardData = null) {
-
+    public function createFile($name, $vcardData = null)
+    {
         if (is_resource($vcardData)) {
             $vcardData = stream_get_contents($vcardData);
         }
@@ -142,41 +145,32 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
         $vcardData = DAV\StringUtil::ensureUTF8($vcardData);
 
         return $this->carddavBackend->createCard($this->addressBookInfo['id'], $name, $vcardData);
-
     }
 
     /**
      * Deletes the entire addressbook.
-     *
-     * @return void
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->carddavBackend->deleteAddressBook($this->addressBookInfo['id']);
-
     }
 
     /**
-     * Renames the addressbook
+     * Renames the addressbook.
      *
      * @param string $newName
-     * @return void
      */
-    function setName($newName) {
-
+    public function setName($newName)
+    {
         throw new DAV\Exception\MethodNotAllowed('Renaming addressbooks is not yet supported');
-
     }
 
     /**
      * Returns the last modification date as a unix timestamp.
-     *
-     * @return void
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
 
     /**
@@ -189,12 +183,10 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
      * Read the PropPatch documentation for more information.
      *
      * @param DAV\PropPatch $propPatch
-     * @return void
      */
-    function propPatch(DAV\PropPatch $propPatch) {
-
+    public function propPatch(DAV\PropPatch $propPatch)
+    {
         return $this->carddavBackend->updateAddressBook($this->addressBookInfo['id'], $propPatch);
-
     }
 
     /**
@@ -206,39 +198,33 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
      * If the array is empty, it means 'all properties' were requested.
      *
      * @param array $properties
+     *
      * @return array
      */
-    function getProperties($properties) {
-
+    public function getProperties($properties)
+    {
         $response = [];
         foreach ($properties as $propertyName) {
-
             if (isset($this->addressBookInfo[$propertyName])) {
-
                 $response[$propertyName] = $this->addressBookInfo[$propertyName];
-
             }
-
         }
 
         return $response;
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->addressBookInfo['principaluri'];
-
     }
 
-
     /**
      * This method returns the ACL's for card nodes in this address book.
      * The result of this method automatically gets passed to the
@@ -246,8 +232,8 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
      *
      * @return array
      */
-    function getChildACL() {
-
+    public function getChildACL()
+    {
         return [
             [
                 'privilege' => '{DAV:}all',
@@ -255,10 +241,8 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
                 'protected' => true,
             ],
         ];
-
     }
 
-
     /**
      * This method returns the current sync-token for this collection.
      * This can be any string.
@@ -268,8 +252,8 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
      *
      * @return string|null
      */
-    function getSyncToken() {
-
+    public function getSyncToken()
+    {
         if (
             $this->carddavBackend instanceof Backend\SyncSupport &&
             isset($this->addressBookInfo['{DAV:}sync-token'])
@@ -282,7 +266,6 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
         ) {
             return $this->addressBookInfo['{http://sabredav.org/ns}sync-token'];
         }
-
     }
 
     /**
@@ -336,12 +319,13 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
      * The limit is 'suggestive'. You are free to ignore it.
      *
      * @param string $syncToken
-     * @param int $syncLevel
-     * @param int $limit
+     * @param int    $syncLevel
+     * @param int    $limit
+     *
      * @return array
      */
-    function getChanges($syncToken, $syncLevel, $limit = null) {
-
+    public function getChanges($syncToken, $syncLevel, $limit = null)
+    {
         if (!$this->carddavBackend instanceof Backend\SyncSupport) {
             return null;
         }
@@ -352,6 +336,5 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
             $syncLevel,
             $limit
         );
-
     }
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php b/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php
index d770c0ffe..fb03000aa 100644
--- a/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php
+++ b/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
@@ -8,7 +10,7 @@ use Sabre\DAVACL;
 use Sabre\Uri;
 
 /**
- * AddressBook Home class
+ * AddressBook Home class.
  *
  * This collection contains a list of addressbooks associated with one user.
  *
@@ -16,81 +18,74 @@ use Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AddressBookHome extends DAV\Collection implements DAV\IExtendedCollection, DAVACL\IACL {
-
+class AddressBookHome extends DAV\Collection implements DAV\IExtendedCollection, DAVACL\IACL
+{
     use DAVACL\ACLTrait;
 
     /**
-     * Principal uri
+     * Principal uri.
      *
      * @var array
      */
     protected $principalUri;
 
     /**
-     * carddavBackend
+     * carddavBackend.
      *
      * @var Backend\BackendInterface
      */
     protected $carddavBackend;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Backend\BackendInterface $carddavBackend
-     * @param string $principalUri
+     * @param string                   $principalUri
      */
-    function __construct(Backend\BackendInterface $carddavBackend, $principalUri) {
-
+    public function __construct(Backend\BackendInterface $carddavBackend, $principalUri)
+    {
         $this->carddavBackend = $carddavBackend;
         $this->principalUri = $principalUri;
-
     }
 
     /**
-     * Returns the name of this object
+     * Returns the name of this object.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         list(, $name) = Uri\split($this->principalUri);
-        return $name;
 
+        return $name;
     }
 
     /**
-     * Updates the name of this object
+     * Updates the name of this object.
      *
      * @param string $name
-     * @return void
      */
-    function setName($name) {
-
+    public function setName($name)
+    {
         throw new DAV\Exception\MethodNotAllowed();
-
     }
 
     /**
-     * Deletes this object
-     *
-     * @return void
+     * Deletes this object.
      */
-    function delete() {
-
+    public function delete()
+    {
         throw new DAV\Exception\MethodNotAllowed();
-
     }
 
     /**
-     * Returns the last modification date
+     * Returns the last modification date.
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
 
     /**
@@ -98,14 +93,12 @@ class AddressBookHome extends DAV\Collection implements DAV\IExtendedCollection,
      *
      * This is currently not allowed
      *
-     * @param string $filename
+     * @param string   $filename
      * @param resource $data
-     * @return void
      */
-    function createFile($filename, $data = null) {
-
+    public function createFile($filename, $data = null)
+    {
         throw new DAV\Exception\MethodNotAllowed('Creating new files in this collection is not supported');
-
     }
 
     /**
@@ -114,78 +107,74 @@ class AddressBookHome extends DAV\Collection implements DAV\IExtendedCollection,
      * This is currently not allowed.
      *
      * @param string $filename
-     * @return void
      */
-    function createDirectory($filename) {
-
+    public function createDirectory($filename)
+    {
         throw new DAV\Exception\MethodNotAllowed('Creating new collections in this collection is not supported');
-
     }
 
     /**
-     * Returns a single addressbook, by name
+     * Returns a single addressbook, by name.
      *
      * @param string $name
+     *
      * @todo needs optimizing
+     *
      * @return AddressBook
      */
-    function getChild($name) {
-
+    public function getChild($name)
+    {
         foreach ($this->getChildren() as $child) {
-            if ($name == $child->getName())
+            if ($name == $child->getName()) {
                 return $child;
-
+            }
         }
-        throw new DAV\Exception\NotFound('Addressbook with name \'' . $name . '\' could not be found');
-
+        throw new DAV\Exception\NotFound('Addressbook with name \''.$name.'\' could not be found');
     }
 
     /**
-     * Returns a list of addressbooks
+     * Returns a list of addressbooks.
      *
      * @return array
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $addressbooks = $this->carddavBackend->getAddressBooksForUser($this->principalUri);
         $objs = [];
         foreach ($addressbooks as $addressbook) {
             $objs[] = new AddressBook($this->carddavBackend, $addressbook);
         }
-        return $objs;
 
+        return $objs;
     }
 
     /**
      * Creates a new address book.
      *
      * @param string $name
-     * @param MkCol $mkCol
+     * @param MkCol  $mkCol
+     *
      * @throws DAV\Exception\InvalidResourceType
-     * @return void
      */
-    function createExtendedCollection($name, MkCol $mkCol) {
-
-        if (!$mkCol->hasResourceType('{' . Plugin::NS_CARDDAV . '}addressbook')) {
+    public function createExtendedCollection($name, MkCol $mkCol)
+    {
+        if (!$mkCol->hasResourceType('{'.Plugin::NS_CARDDAV.'}addressbook')) {
             throw new DAV\Exception\InvalidResourceType('Unknown resourceType for this collection');
         }
         $properties = $mkCol->getRemainingValues();
         $mkCol->setRemainingResultCode(201);
         $this->carddavBackend->createAddressBook($this->principalUri, $name, $properties);
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->principalUri;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/AddressBookRoot.php b/vendor/sabre/dav/lib/CardDAV/AddressBookRoot.php
index a9f1183da..219f98906 100644
--- a/vendor/sabre/dav/lib/CardDAV/AddressBookRoot.php
+++ b/vendor/sabre/dav/lib/CardDAV/AddressBookRoot.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAVACL;
 
 /**
- * AddressBook rootnode
+ * AddressBook rootnode.
  *
  * This object lists a collection of users, which can contain addressbooks.
  *
@@ -13,24 +15,24 @@ use Sabre\DAVACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AddressBookRoot extends DAVACL\AbstractPrincipalCollection {
-
+class AddressBookRoot extends DAVACL\AbstractPrincipalCollection
+{
     /**
-     * Principal Backend
+     * Principal Backend.
      *
      * @var DAVACL\PrincipalBackend\BackendInterface
      */
     protected $principalBackend;
 
     /**
-     * CardDAV backend
+     * CardDAV backend.
      *
      * @var Backend\BackendInterface
      */
     protected $carddavBackend;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * This constructor needs both a principal and a carddav backend.
      *
@@ -40,25 +42,23 @@ class AddressBookRoot extends DAVACL\AbstractPrincipalCollection {
      * to override this.
      *
      * @param DAVACL\PrincipalBackend\BackendInterface $principalBackend
-     * @param Backend\BackendInterface $carddavBackend
-     * @param string $principalPrefix
+     * @param Backend\BackendInterface                 $carddavBackend
+     * @param string                                   $principalPrefix
      */
-    function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, Backend\BackendInterface $carddavBackend, $principalPrefix = 'principals') {
-
+    public function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, Backend\BackendInterface $carddavBackend, $principalPrefix = 'principals')
+    {
         $this->carddavBackend = $carddavBackend;
         parent::__construct($principalBackend, $principalPrefix);
-
     }
 
     /**
-     * Returns the name of the node
+     * Returns the name of the node.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return Plugin::ADDRESSBOOK_ROOT;
-
     }
 
     /**
@@ -69,12 +69,11 @@ class AddressBookRoot extends DAVACL\AbstractPrincipalCollection {
      * supplied by the authentication backend.
      *
      * @param array $principal
+     *
      * @return \Sabre\DAV\INode
      */
-    function getChildForPrincipal(array $principal) {
-
+    public function getChildForPrincipal(array $principal)
+    {
         return new AddressBookHome($this->carddavBackend, $principal['uri']);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Backend/AbstractBackend.php b/vendor/sabre/dav/lib/CardDAV/Backend/AbstractBackend.php
index 03d2346da..6b041ade4 100644
--- a/vendor/sabre/dav/lib/CardDAV/Backend/AbstractBackend.php
+++ b/vendor/sabre/dav/lib/CardDAV/Backend/AbstractBackend.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Backend;
 
 /**
- * CardDAV abstract Backend
+ * CardDAV abstract Backend.
  *
  * This class serves as a base-class for addressbook backends
  *
@@ -13,8 +15,8 @@ namespace Sabre\CardDAV\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractBackend implements BackendInterface {
-
+abstract class AbstractBackend implements BackendInterface
+{
     /**
      * Returns a list of cards.
      *
@@ -25,14 +27,13 @@ abstract class AbstractBackend implements BackendInterface {
      *
      * @param mixed $addressBookId
      * @param array $uris
+     *
      * @return array
      */
-    function getMultipleCards($addressBookId, array $uris) {
-
-        return array_map(function($uri) use ($addressBookId) {
+    public function getMultipleCards($addressBookId, array $uris)
+    {
+        return array_map(function ($uri) use ($addressBookId) {
             return $this->getCard($addressBookId, $uri);
         }, $uris);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php b/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php
index 18c0c0a99..804f09a36 100644
--- a/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Backend;
 
 /**
- * CardDAV Backend Interface
+ * CardDAV Backend Interface.
  *
  * Any CardDAV backend must implement this interface.
  *
@@ -15,8 +17,8 @@ namespace Sabre\CardDAV\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface BackendInterface {
-
+interface BackendInterface
+{
     /**
      * Returns the list of addressbooks for a specific user.
      *
@@ -32,9 +34,10 @@ interface BackendInterface {
      *   {http://calendarserver.org/ns/}getctag
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getAddressBooksForUser($principalUri);
+    public function getAddressBooksForUser($principalUri);
 
     /**
      * Updates properties for an address book.
@@ -48,11 +51,10 @@ interface BackendInterface {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param string $addressBookId
+     * @param string               $addressBookId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch);
+    public function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch);
 
     /**
      * Creates a new address book.
@@ -61,19 +63,19 @@ interface BackendInterface {
      * in any format, including ints, strings, arrays or objects.
      *
      * @param string $principalUri
-     * @param string $url Just the 'basename' of the url.
-     * @param array $properties
+     * @param string $url          just the 'basename' of the url
+     * @param array  $properties
+     *
      * @return mixed
      */
-    function createAddressBook($principalUri, $url, array $properties);
+    public function createAddressBook($principalUri, $url, array $properties);
 
     /**
-     * Deletes an entire addressbook and all its contents
+     * Deletes an entire addressbook and all its contents.
      *
      * @param mixed $addressBookId
-     * @return void
      */
-    function deleteAddressBook($addressBookId);
+    public function deleteAddressBook($addressBookId);
 
     /**
      * Returns all cards for a specific addressbook id.
@@ -92,9 +94,10 @@ interface BackendInterface {
      * This may speed up certain requests, especially with large cards.
      *
      * @param mixed $addressbookId
+     *
      * @return array
      */
-    function getCards($addressbookId);
+    public function getCards($addressbookId);
 
     /**
      * Returns a specfic card.
@@ -104,11 +107,12 @@ interface BackendInterface {
      *
      * If the card does not exist, you must return false.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
+     *
      * @return array
      */
-    function getCard($addressBookId, $cardUri);
+    public function getCard($addressBookId, $cardUri);
 
     /**
      * Returns a list of cards.
@@ -120,9 +124,10 @@ interface BackendInterface {
      *
      * @param mixed $addressBookId
      * @param array $uris
+     *
      * @return array
      */
-    function getMultipleCards($addressBookId, array $uris);
+    public function getMultipleCards($addressBookId, array $uris);
 
     /**
      * Creates a new card.
@@ -144,12 +149,13 @@ interface BackendInterface {
      *
      * If you don't return an ETag, you can just return null.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
      * @param string $cardData
+     *
      * @return string|null
      */
-    function createCard($addressBookId, $cardUri, $cardData);
+    public function createCard($addressBookId, $cardUri, $cardData);
 
     /**
      * Updates a card.
@@ -171,20 +177,21 @@ interface BackendInterface {
      *
      * If you don't return an ETag, you can just return null.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
      * @param string $cardData
+     *
      * @return string|null
      */
-    function updateCard($addressBookId, $cardUri, $cardData);
+    public function updateCard($addressBookId, $cardUri, $cardData);
 
     /**
-     * Deletes a card
+     * Deletes a card.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
+     *
      * @return bool
      */
-    function deleteCard($addressBookId, $cardUri);
-
+    public function deleteCard($addressBookId, $cardUri);
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php b/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php
index 13487e9da..0659455e5 100644
--- a/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Backend;
 
 use Sabre\CardDAV;
 use Sabre\DAV;
 
 /**
- * PDO CardDAV backend
+ * PDO CardDAV backend.
  *
  * This CardDAV backend uses PDO to store addressbooks
  *
@@ -14,22 +16,22 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PDO extends AbstractBackend implements SyncSupport {
-
+class PDO extends AbstractBackend implements SyncSupport
+{
     /**
-     * PDO connection
+     * PDO connection.
      *
      * @var PDO
      */
     protected $pdo;
 
     /**
-     * The PDO table name used to store addressbooks
+     * The PDO table name used to store addressbooks.
      */
     public $addressBooksTableName = 'addressbooks';
 
     /**
-     * The PDO table name used to store cards
+     * The PDO table name used to store cards.
      */
     public $cardsTableName = 'cards';
 
@@ -41,48 +43,44 @@ class PDO extends AbstractBackend implements SyncSupport {
     public $addressBookChangesTableName = 'addressbookchanges';
 
     /**
-     * Sets up the object
+     * Sets up the object.
      *
      * @param \PDO $pdo
      */
-    function __construct(\PDO $pdo) {
-
+    public function __construct(\PDO $pdo)
+    {
         $this->pdo = $pdo;
-
     }
 
     /**
      * Returns the list of addressbooks for a specific user.
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getAddressBooksForUser($principalUri) {
-
-        $stmt = $this->pdo->prepare('SELECT id, uri, displayname, principaluri, description, synctoken FROM ' . $this->addressBooksTableName . ' WHERE principaluri = ?');
+    public function getAddressBooksForUser($principalUri)
+    {
+        $stmt = $this->pdo->prepare('SELECT id, uri, displayname, principaluri, description, synctoken FROM '.$this->addressBooksTableName.' WHERE principaluri = ?');
         $stmt->execute([$principalUri]);
 
         $addressBooks = [];
 
         foreach ($stmt->fetchAll() as $row) {
-
             $addressBooks[] = [
-                'id'                                                          => $row['id'],
-                'uri'                                                         => $row['uri'],
-                'principaluri'                                                => $row['principaluri'],
-                '{DAV:}displayname'                                           => $row['displayname'],
-                '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-                '{http://calendarserver.org/ns/}getctag'                      => $row['synctoken'],
-                '{http://sabredav.org/ns}sync-token'                          => $row['synctoken'] ? $row['synctoken'] : '0',
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'principaluri' => $row['principaluri'],
+                '{DAV:}displayname' => $row['displayname'],
+                '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => $row['description'],
+                '{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
             ];
-
         }
 
         return $addressBooks;
-
     }
 
-
     /**
      * Updates properties for an address book.
      *
@@ -95,32 +93,29 @@ class PDO extends AbstractBackend implements SyncSupport {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param string $addressBookId
+     * @param string               $addressBookId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
-
+    public function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch)
+    {
         $supportedProperties = [
             '{DAV:}displayname',
-            '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description',
+            '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description',
         ];
 
-        $propPatch->handle($supportedProperties, function($mutations) use ($addressBookId) {
-
+        $propPatch->handle($supportedProperties, function ($mutations) use ($addressBookId) {
             $updates = [];
             foreach ($mutations as $property => $newValue) {
-
                 switch ($property) {
-                    case '{DAV:}displayname' :
+                    case '{DAV:}displayname':
                         $updates['displayname'] = $newValue;
                         break;
-                    case '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' :
+                    case '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description':
                         $updates['description'] = $newValue;
                         break;
                 }
             }
-            $query = 'UPDATE ' . $this->addressBooksTableName . ' SET ';
+            $query = 'UPDATE '.$this->addressBooksTableName.' SET ';
             $first = true;
             foreach ($updates as $key => $value) {
                 if ($first) {
@@ -128,7 +123,7 @@ class PDO extends AbstractBackend implements SyncSupport {
                 } else {
                     $query .= ', ';
                 }
-                $query .= ' ' . $key . ' = :' . $key . ' ';
+                $query .= ' '.$key.' = :'.$key.' ';
             }
             $query .= ' WHERE id = :addressbookid';
 
@@ -137,72 +132,67 @@ class PDO extends AbstractBackend implements SyncSupport {
 
             $stmt->execute($updates);
 
-            $this->addChange($addressBookId, "", 2);
+            $this->addChange($addressBookId, '', 2);
 
             return true;
-
         });
-
     }
 
     /**
-     * Creates a new address book
+     * Creates a new address book.
      *
      * @param string $principalUri
-     * @param string $url Just the 'basename' of the url.
-     * @param array $properties
+     * @param string $url          just the 'basename' of the url
+     * @param array  $properties
+     *
      * @return int Last insert id
      */
-    function createAddressBook($principalUri, $url, array $properties) {
-
+    public function createAddressBook($principalUri, $url, array $properties)
+    {
         $values = [
-            'displayname'  => null,
-            'description'  => null,
+            'displayname' => null,
+            'description' => null,
             'principaluri' => $principalUri,
-            'uri'          => $url,
+            'uri' => $url,
         ];
 
         foreach ($properties as $property => $newValue) {
-
             switch ($property) {
-                case '{DAV:}displayname' :
+                case '{DAV:}displayname':
                     $values['displayname'] = $newValue;
                     break;
-                case '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' :
+                case '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description':
                     $values['description'] = $newValue;
                     break;
-                default :
-                    throw new DAV\Exception\BadRequest('Unknown property: ' . $property);
+                default:
+                    throw new DAV\Exception\BadRequest('Unknown property: '.$property);
             }
-
         }
 
-        $query = 'INSERT INTO ' . $this->addressBooksTableName . ' (uri, displayname, description, principaluri, synctoken) VALUES (:uri, :displayname, :description, :principaluri, 1)';
+        $query = 'INSERT INTO '.$this->addressBooksTableName.' (uri, displayname, description, principaluri, synctoken) VALUES (:uri, :displayname, :description, :principaluri, 1)';
         $stmt = $this->pdo->prepare($query);
         $stmt->execute($values);
+
         return $this->pdo->lastInsertId(
-            $this->addressBooksTableName . '_id_seq'
+            $this->addressBooksTableName.'_id_seq'
         );
-
     }
 
     /**
-     * Deletes an entire addressbook and all its contents
+     * Deletes an entire addressbook and all its contents.
      *
      * @param int $addressBookId
-     * @return void
      */
-    function deleteAddressBook($addressBookId) {
-
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->cardsTableName . ' WHERE addressbookid = ?');
+    public function deleteAddressBook($addressBookId)
+    {
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->cardsTableName.' WHERE addressbookid = ?');
         $stmt->execute([$addressBookId]);
 
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->addressBooksTableName . ' WHERE id = ?');
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->addressBooksTableName.' WHERE id = ?');
         $stmt->execute([$addressBookId]);
 
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->addressBookChangesTableName . ' WHERE addressbookid = ?');
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->addressBookChangesTableName.' WHERE addressbookid = ?');
         $stmt->execute([$addressBookId]);
-
     }
 
     /**
@@ -222,21 +212,22 @@ class PDO extends AbstractBackend implements SyncSupport {
      * This may speed up certain requests, especially with large cards.
      *
      * @param mixed $addressbookId
+     *
      * @return array
      */
-    function getCards($addressbookId) {
-
-        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, size FROM ' . $this->cardsTableName . ' WHERE addressbookid = ?');
+    public function getCards($addressbookId)
+    {
+        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, size FROM '.$this->cardsTableName.' WHERE addressbookid = ?');
         $stmt->execute([$addressbookId]);
 
         $result = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-            $row['etag'] = '"' . $row['etag'] . '"';
-            $row['lastmodified'] = (int)$row['lastmodified'];
+            $row['etag'] = '"'.$row['etag'].'"';
+            $row['lastmodified'] = (int) $row['lastmodified'];
             $result[] = $row;
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -247,23 +238,26 @@ class PDO extends AbstractBackend implements SyncSupport {
      *
      * If the card does not exist, you must return false.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
+     *
      * @return array
      */
-    function getCard($addressBookId, $cardUri) {
-
-        $stmt = $this->pdo->prepare('SELECT id, carddata, uri, lastmodified, etag, size FROM ' . $this->cardsTableName . ' WHERE addressbookid = ? AND uri = ? LIMIT 1');
+    public function getCard($addressBookId, $cardUri)
+    {
+        $stmt = $this->pdo->prepare('SELECT id, carddata, uri, lastmodified, etag, size FROM '.$this->cardsTableName.' WHERE addressbookid = ? AND uri = ? LIMIT 1');
         $stmt->execute([$addressBookId, $cardUri]);
 
         $result = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-        if (!$result) return false;
+        if (!$result) {
+            return false;
+        }
+
+        $result['etag'] = '"'.$result['etag'].'"';
+        $result['lastmodified'] = (int) $result['lastmodified'];
 
-        $result['etag'] = '"' . $result['etag'] . '"';
-        $result['lastmodified'] = (int)$result['lastmodified'];
         return $result;
-
     }
 
     /**
@@ -276,11 +270,12 @@ class PDO extends AbstractBackend implements SyncSupport {
      *
      * @param mixed $addressBookId
      * @param array $uris
+     *
      * @return array
      */
-    function getMultipleCards($addressBookId, array $uris) {
-
-        $query = 'SELECT id, uri, lastmodified, etag, size, carddata FROM ' . $this->cardsTableName . ' WHERE addressbookid = ? AND uri IN (';
+    public function getMultipleCards($addressBookId, array $uris)
+    {
+        $query = 'SELECT id, uri, lastmodified, etag, size, carddata FROM '.$this->cardsTableName.' WHERE addressbookid = ? AND uri IN (';
         // Inserting a whole bunch of question marks
         $query .= implode(',', array_fill(0, count($uris), '?'));
         $query .= ')';
@@ -289,12 +284,12 @@ class PDO extends AbstractBackend implements SyncSupport {
         $stmt->execute(array_merge([$addressBookId], $uris));
         $result = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-            $row['etag'] = '"' . $row['etag'] . '"';
-            $row['lastmodified'] = (int)$row['lastmodified'];
+            $row['etag'] = '"'.$row['etag'].'"';
+            $row['lastmodified'] = (int) $row['lastmodified'];
             $result[] = $row;
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -317,14 +312,15 @@ class PDO extends AbstractBackend implements SyncSupport {
      *
      * If you don't return an ETag, you can just return null.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
      * @param string $cardData
+     *
      * @return string|null
      */
-    function createCard($addressBookId, $cardUri, $cardData) {
-
-        $stmt = $this->pdo->prepare('INSERT INTO ' . $this->cardsTableName . ' (carddata, uri, lastmodified, addressbookid, size, etag) VALUES (?, ?, ?, ?, ?, ?)');
+    public function createCard($addressBookId, $cardUri, $cardData)
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->cardsTableName.' (carddata, uri, lastmodified, addressbookid, size, etag) VALUES (?, ?, ?, ?, ?, ?)');
 
         $etag = md5($cardData);
 
@@ -339,8 +335,7 @@ class PDO extends AbstractBackend implements SyncSupport {
 
         $this->addChange($addressBookId, $cardUri, 1);
 
-        return '"' . $etag . '"';
-
+        return '"'.$etag.'"';
     }
 
     /**
@@ -363,14 +358,15 @@ class PDO extends AbstractBackend implements SyncSupport {
      *
      * If you don't return an ETag, you can just return null.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
      * @param string $cardData
+     *
      * @return string|null
      */
-    function updateCard($addressBookId, $cardUri, $cardData) {
-
-        $stmt = $this->pdo->prepare('UPDATE ' . $this->cardsTableName . ' SET carddata = ?, lastmodified = ?, size = ?, etag = ? WHERE uri = ? AND addressbookid =?');
+    public function updateCard($addressBookId, $cardUri, $cardData)
+    {
+        $stmt = $this->pdo->prepare('UPDATE '.$this->cardsTableName.' SET carddata = ?, lastmodified = ?, size = ?, etag = ? WHERE uri = ? AND addressbookid =?');
 
         $etag = md5($cardData);
         $stmt->execute([
@@ -379,31 +375,30 @@ class PDO extends AbstractBackend implements SyncSupport {
             strlen($cardData),
             $etag,
             $cardUri,
-            $addressBookId
+            $addressBookId,
         ]);
 
         $this->addChange($addressBookId, $cardUri, 2);
 
-        return '"' . $etag . '"';
-
+        return '"'.$etag.'"';
     }
 
     /**
-     * Deletes a card
+     * Deletes a card.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
+     *
      * @return bool
      */
-    function deleteCard($addressBookId, $cardUri) {
-
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->cardsTableName . ' WHERE addressbookid = ? AND uri = ?');
+    public function deleteCard($addressBookId, $cardUri)
+    {
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->cardsTableName.' WHERE addressbookid = ? AND uri = ?');
         $stmt->execute([$addressBookId, $cardUri]);
 
         $this->addChange($addressBookId, $cardUri, 3);
 
-        return $stmt->rowCount() === 1;
-
+        return 1 === $stmt->rowCount();
     }
 
     /**
@@ -458,30 +453,34 @@ class PDO extends AbstractBackend implements SyncSupport {
      *
      * @param string $addressBookId
      * @param string $syncToken
-     * @param int $syncLevel
-     * @param int $limit
+     * @param int    $syncLevel
+     * @param int    $limit
+     *
      * @return array
      */
-    function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null) {
-
+    public function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null)
+    {
         // Current synctoken
-        $stmt = $this->pdo->prepare('SELECT synctoken FROM ' . $this->addressBooksTableName . ' WHERE id = ?');
+        $stmt = $this->pdo->prepare('SELECT synctoken FROM '.$this->addressBooksTableName.' WHERE id = ?');
         $stmt->execute([$addressBookId]);
         $currentToken = $stmt->fetchColumn(0);
 
-        if (is_null($currentToken)) return null;
+        if (is_null($currentToken)) {
+            return null;
+        }
 
         $result = [
             'syncToken' => $currentToken,
-            'added'     => [],
-            'modified'  => [],
-            'deleted'   => [],
+            'added' => [],
+            'modified' => [],
+            'deleted' => [],
         ];
 
         if ($syncToken) {
-
-            $query = "SELECT uri, operation FROM " . $this->addressBookChangesTableName . " WHERE synctoken >= ? AND synctoken < ? AND addressbookid = ? ORDER BY synctoken";
-            if ($limit > 0) $query .= " LIMIT " . (int)$limit;
+            $query = 'SELECT uri, operation FROM '.$this->addressBookChangesTableName.' WHERE synctoken >= ? AND synctoken < ? AND addressbookid = ? ORDER BY synctoken';
+            if ($limit > 0) {
+                $query .= ' LIMIT '.(int) $limit;
+            }
 
             // Fetching all changes
             $stmt = $this->pdo->prepare($query);
@@ -492,13 +491,10 @@ class PDO extends AbstractBackend implements SyncSupport {
             // This loop ensures that any duplicates are overwritten, only the
             // last change on a node is relevant.
             while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
                 $changes[$row['uri']] = $row['operation'];
-
             }
 
             foreach ($changes as $uri => $operation) {
-
                 switch ($operation) {
                     case 1:
                         $result['added'][] = $uri;
@@ -510,41 +506,38 @@ class PDO extends AbstractBackend implements SyncSupport {
                         $result['deleted'][] = $uri;
                         break;
                 }
-
             }
         } else {
             // No synctoken supplied, this is the initial sync.
-            $query = "SELECT uri FROM " . $this->cardsTableName . " WHERE addressbookid = ?";
+            $query = 'SELECT uri FROM '.$this->cardsTableName.' WHERE addressbookid = ?';
             $stmt = $this->pdo->prepare($query);
             $stmt->execute([$addressBookId]);
 
             $result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
         }
-        return $result;
 
+        return $result;
     }
 
     /**
      * Adds a change record to the addressbookchanges table.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $objectUri
-     * @param int $operation 1 = add, 2 = modify, 3 = delete
-     * @return void
+     * @param int    $operation     1 = add, 2 = modify, 3 = delete
      */
-    protected function addChange($addressBookId, $objectUri, $operation) {
-
-        $stmt = $this->pdo->prepare('INSERT INTO ' . $this->addressBookChangesTableName . ' (uri, synctoken, addressbookid, operation) SELECT ?, synctoken, ?, ? FROM ' . $this->addressBooksTableName . ' WHERE id = ?');
+    protected function addChange($addressBookId, $objectUri, $operation)
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->addressBookChangesTableName.' (uri, synctoken, addressbookid, operation) SELECT ?, synctoken, ?, ? FROM '.$this->addressBooksTableName.' WHERE id = ?');
         $stmt->execute([
             $objectUri,
             $addressBookId,
             $operation,
-            $addressBookId
+            $addressBookId,
         ]);
-        $stmt = $this->pdo->prepare('UPDATE ' . $this->addressBooksTableName . ' SET synctoken = synctoken + 1 WHERE id = ?');
+        $stmt = $this->pdo->prepare('UPDATE '.$this->addressBooksTableName.' SET synctoken = synctoken + 1 WHERE id = ?');
         $stmt->execute([
-            $addressBookId
+            $addressBookId,
         ]);
-
     }
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Backend/SyncSupport.php b/vendor/sabre/dav/lib/CardDAV/Backend/SyncSupport.php
index f80618a8e..071361ed0 100644
--- a/vendor/sabre/dav/lib/CardDAV/Backend/SyncSupport.php
+++ b/vendor/sabre/dav/lib/CardDAV/Backend/SyncSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Backend;
 
 /**
@@ -18,8 +20,8 @@ namespace Sabre\CardDAV\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface SyncSupport extends BackendInterface {
-
+interface SyncSupport extends BackendInterface
+{
     /**
      * The getChanges method returns all the changes that have happened, since
      * the specified syncToken in the specified address book.
@@ -72,10 +74,10 @@ interface SyncSupport extends BackendInterface {
      *
      * @param string $addressBookId
      * @param string $syncToken
-     * @param int $syncLevel
-     * @param int $limit
+     * @param int    $syncLevel
+     * @param int    $limit
+     *
      * @return array
      */
-    function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null);
-
+    public function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null);
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Card.php b/vendor/sabre/dav/lib/CardDAV/Card.php
index 42a2d7b6a..1d544f4aa 100644
--- a/vendor/sabre/dav/lib/CardDAV/Card.php
+++ b/vendor/sabre/dav/lib/CardDAV/Card.php
@@ -1,94 +1,96 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 use Sabre\DAVACL;
 
 /**
- * The Card object represents a single Card from an addressbook
+ * The Card object represents a single Card from an addressbook.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Card extends DAV\File implements ICard, DAVACL\IACL {
-
+class Card extends DAV\File implements ICard, DAVACL\IACL
+{
     use DAVACL\ACLTrait;
 
     /**
-     * CardDAV backend
+     * CardDAV backend.
      *
      * @var Backend\BackendInterface
      */
     protected $carddavBackend;
 
     /**
-     * Array with information about this Card
+     * Array with information about this Card.
      *
      * @var array
      */
     protected $cardData;
 
     /**
-     * Array with information about the containing addressbook
+     * Array with information about the containing addressbook.
      *
      * @var array
      */
     protected $addressBookInfo;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Backend\BackendInterface $carddavBackend
-     * @param array $addressBookInfo
-     * @param array $cardData
+     * @param array                    $addressBookInfo
+     * @param array                    $cardData
      */
-    function __construct(Backend\BackendInterface $carddavBackend, array $addressBookInfo, array $cardData) {
-
+    public function __construct(Backend\BackendInterface $carddavBackend, array $addressBookInfo, array $cardData)
+    {
         $this->carddavBackend = $carddavBackend;
         $this->addressBookInfo = $addressBookInfo;
         $this->cardData = $cardData;
-
     }
 
     /**
-     * Returns the uri for this object
+     * Returns the uri for this object.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->cardData['uri'];
-
     }
 
     /**
-     * Returns the VCard-formatted object
+     * Returns the VCard-formatted object.
      *
      * @return string
      */
-    function get() {
-
+    public function get()
+    {
         // Pre-populating 'carddata' is optional. If we don't yet have it
         // already, we fetch it from the backend.
         if (!isset($this->cardData['carddata'])) {
             $this->cardData = $this->carddavBackend->getCard($this->addressBookInfo['id'], $this->cardData['uri']);
         }
-        return $this->cardData['carddata'];
 
+        return $this->cardData['carddata'];
     }
 
     /**
-     * Updates the VCard-formatted object
+     * Updates the VCard-formatted object.
      *
      * @param string $cardData
+     *
      * @return string|null
      */
-    function put($cardData) {
-
-        if (is_resource($cardData))
+    public function put($cardData)
+    {
+        if (is_resource($cardData)) {
             $cardData = stream_get_contents($cardData);
+        }
 
         // Converting to UTF-8, if needed
         $cardData = DAV\StringUtil::ensureUTF8($cardData);
@@ -98,92 +100,82 @@ class Card extends DAV\File implements ICard, DAVACL\IACL {
         $this->cardData['etag'] = $etag;
 
         return $etag;
-
     }
 
     /**
-     * Deletes the card
-     *
-     * @return void
+     * Deletes the card.
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->carddavBackend->deleteCard($this->addressBookInfo['id'], $this->cardData['uri']);
-
     }
 
     /**
-     * Returns the mime content-type
+     * Returns the mime content-type.
      *
      * @return string
      */
-    function getContentType() {
-
+    public function getContentType()
+    {
         return 'text/vcard; charset=utf-8';
-
     }
 
     /**
-     * Returns an ETag for this object
+     * Returns an ETag for this object.
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         if (isset($this->cardData['etag'])) {
             return $this->cardData['etag'];
         } else {
             $data = $this->get();
             if (is_string($data)) {
-                return '"' . md5($data) . '"';
+                return '"'.md5($data).'"';
             } else {
                 // We refuse to calculate the md5 if it's a stream.
                 return null;
             }
         }
-
     }
 
     /**
-     * Returns the last modification date as a unix timestamp
+     * Returns the last modification date as a unix timestamp.
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return isset($this->cardData['lastmodified']) ? $this->cardData['lastmodified'] : null;
-
     }
 
     /**
-     * Returns the size of this object in bytes
+     * Returns the size of this object in bytes.
      *
      * @return int
      */
-    function getSize() {
-
+    public function getSize()
+    {
         if (array_key_exists('size', $this->cardData)) {
             return $this->cardData['size'];
         } else {
             return strlen($this->get());
         }
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->addressBookInfo['principaluri'];
-
     }
 
-
     /**
      * Returns a list of ACE's for this node.
      *
@@ -196,8 +188,8 @@ class Card extends DAV\File implements ICard, DAVACL\IACL {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         // An alternative acl may be specified through the cardData array.
         if (isset($this->cardData['acl'])) {
             return $this->cardData['acl'];
@@ -210,7 +202,5 @@ class Card extends DAV\File implements ICard, DAVACL\IACL {
                 'protected' => true,
             ],
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/IAddressBook.php b/vendor/sabre/dav/lib/CardDAV/IAddressBook.php
index f80e05575..3f489f4e5 100644
--- a/vendor/sabre/dav/lib/CardDAV/IAddressBook.php
+++ b/vendor/sabre/dav/lib/CardDAV/IAddressBook.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 
 /**
- * AddressBook interface
+ * AddressBook interface.
  *
  * Implement this interface to allow a node to be recognized as an addressbook.
  *
@@ -13,6 +15,6 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IAddressBook extends DAV\ICollection {
-
+interface IAddressBook extends DAV\ICollection
+{
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/ICard.php b/vendor/sabre/dav/lib/CardDAV/ICard.php
index a974cbd8f..30e9d415e 100644
--- a/vendor/sabre/dav/lib/CardDAV/ICard.php
+++ b/vendor/sabre/dav/lib/CardDAV/ICard.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 
 /**
- * Card interface
+ * Card interface.
  *
  * Extend the ICard interface to allow your custom nodes to be picked up as
  * 'Cards'.
@@ -14,6 +16,6 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ICard extends DAV\IFile {
-
+interface ICard extends DAV\IFile
+{
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/IDirectory.php b/vendor/sabre/dav/lib/CardDAV/IDirectory.php
index d991a1cc8..05e6bef32 100644
--- a/vendor/sabre/dav/lib/CardDAV/IDirectory.php
+++ b/vendor/sabre/dav/lib/CardDAV/IDirectory.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 /**
- * IDirectory interface
+ * IDirectory interface.
  *
  * Implement this interface to have an addressbook marked as a 'directory'. A
  * directory is an (often) global addressbook.
@@ -15,6 +17,6 @@ namespace Sabre\CardDAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IDirectory extends IAddressBook {
-
+interface IDirectory extends IAddressBook
+{
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Plugin.php b/vendor/sabre/dav/lib/CardDAV/Plugin.php
index 272ae71fa..10398a4d2 100644
--- a/vendor/sabre/dav/lib/CardDAV/Plugin.php
+++ b/vendor/sabre/dav/lib/CardDAV/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
@@ -9,10 +11,11 @@ use Sabre\DAVACL;
 use Sabre\HTTP;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
+use Sabre\Uri;
 use Sabre\VObject;
 
 /**
- * CardDAV plugin
+ * CardDAV plugin.
  *
  * The CardDAV plugin adds CardDAV functionality to the WebDAV server
  *
@@ -20,15 +23,15 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     /**
-     * Url to the addressbooks
+     * Url to the addressbooks.
      */
     const ADDRESSBOOK_ROOT = 'addressbooks';
 
     /**
-     * xml namespace for CardDAV elements
+     * xml namespace for CardDAV elements.
      */
     const NS_CARDDAV = 'urn:ietf:params:xml:ns:carddav';
 
@@ -41,7 +44,7 @@ class Plugin extends DAV\ServerPlugin {
     public $directories = [];
 
     /**
-     * Server class
+     * Server class.
      *
      * @var DAV\Server
      */
@@ -55,41 +58,39 @@ class Plugin extends DAV\ServerPlugin {
     protected $maxResourceSize = 10000000;
 
     /**
-     * Initializes the plugin
+     * Initializes the plugin.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         /* Events */
-        $server->on('propFind',            [$this, 'propFindEarly']);
-        $server->on('propFind',            [$this, 'propFindLate'], 150);
-        $server->on('report',              [$this, 'report']);
-        $server->on('onHTMLActionsPanel',  [$this, 'htmlActionsPanel']);
-        $server->on('beforeWriteContent',  [$this, 'beforeWriteContent']);
-        $server->on('beforeCreateFile',    [$this, 'beforeCreateFile']);
-        $server->on('afterMethod:GET',     [$this, 'httpAfterGet']);
+        $server->on('propFind', [$this, 'propFindEarly']);
+        $server->on('propFind', [$this, 'propFindLate'], 150);
+        $server->on('report', [$this, 'report']);
+        $server->on('onHTMLActionsPanel', [$this, 'htmlActionsPanel']);
+        $server->on('beforeWriteContent', [$this, 'beforeWriteContent']);
+        $server->on('beforeCreateFile', [$this, 'beforeCreateFile']);
+        $server->on('afterMethod:GET', [$this, 'httpAfterGet']);
 
         $server->xml->namespaceMap[self::NS_CARDDAV] = 'card';
 
-        $server->xml->elementMap['{' . self::NS_CARDDAV . '}addressbook-query'] = 'Sabre\\CardDAV\\Xml\\Request\\AddressBookQueryReport';
-        $server->xml->elementMap['{' . self::NS_CARDDAV . '}addressbook-multiget'] = 'Sabre\\CardDAV\\Xml\\Request\\AddressBookMultiGetReport';
+        $server->xml->elementMap['{'.self::NS_CARDDAV.'}addressbook-query'] = 'Sabre\\CardDAV\\Xml\\Request\\AddressBookQueryReport';
+        $server->xml->elementMap['{'.self::NS_CARDDAV.'}addressbook-multiget'] = 'Sabre\\CardDAV\\Xml\\Request\\AddressBookMultiGetReport';
 
         /* Mapping Interfaces to {DAV:}resourcetype values */
-        $server->resourceTypeMapping['Sabre\\CardDAV\\IAddressBook'] = '{' . self::NS_CARDDAV . '}addressbook';
-        $server->resourceTypeMapping['Sabre\\CardDAV\\IDirectory'] = '{' . self::NS_CARDDAV . '}directory';
+        $server->resourceTypeMapping['Sabre\\CardDAV\\IAddressBook'] = '{'.self::NS_CARDDAV.'}addressbook';
+        $server->resourceTypeMapping['Sabre\\CardDAV\\IDirectory'] = '{'.self::NS_CARDDAV.'}directory';
 
         /* Adding properties that may never be changed */
-        $server->protectedProperties[] = '{' . self::NS_CARDDAV . '}supported-address-data';
-        $server->protectedProperties[] = '{' . self::NS_CARDDAV . '}max-resource-size';
-        $server->protectedProperties[] = '{' . self::NS_CARDDAV . '}addressbook-home-set';
-        $server->protectedProperties[] = '{' . self::NS_CARDDAV . '}supported-collation-set';
+        $server->protectedProperties[] = '{'.self::NS_CARDDAV.'}supported-address-data';
+        $server->protectedProperties[] = '{'.self::NS_CARDDAV.'}max-resource-size';
+        $server->protectedProperties[] = '{'.self::NS_CARDDAV.'}addressbook-home-set';
+        $server->protectedProperties[] = '{'.self::NS_CARDDAV.'}supported-collation-set';
 
         $server->xml->elementMap['{http://calendarserver.org/ns/}me-card'] = 'Sabre\\DAV\\Xml\\Property\\Href';
 
         $this->server = $server;
-
     }
 
     /**
@@ -99,10 +100,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['addressbook'];
-
     }
 
     /**
@@ -113,117 +113,111 @@ class Plugin extends DAV\ServerPlugin {
      * implement them
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getSupportedReportSet($uri) {
-
+    public function getSupportedReportSet($uri)
+    {
         $node = $this->server->tree->getNodeForPath($uri);
         if ($node instanceof IAddressBook || $node instanceof ICard) {
             return [
-                 '{' . self::NS_CARDDAV . '}addressbook-multiget',
-                 '{' . self::NS_CARDDAV . '}addressbook-query',
+                 '{'.self::NS_CARDDAV.'}addressbook-multiget',
+                 '{'.self::NS_CARDDAV.'}addressbook-query',
             ];
         }
-        return [];
 
+        return [];
     }
 
-
     /**
-     * Adds all CardDAV-specific properties
+     * Adds all CardDAV-specific properties.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
-     * @return void
+     * @param DAV\INode    $node
      */
-    function propFindEarly(DAV\PropFind $propFind, DAV\INode $node) {
-
-        $ns = '{' . self::NS_CARDDAV . '}';
+    public function propFindEarly(DAV\PropFind $propFind, DAV\INode $node)
+    {
+        $ns = '{'.self::NS_CARDDAV.'}';
 
         if ($node instanceof IAddressBook) {
-
-            $propFind->handle($ns . 'max-resource-size', $this->maxResourceSize);
-            $propFind->handle($ns . 'supported-address-data', function() {
+            $propFind->handle($ns.'max-resource-size', $this->maxResourceSize);
+            $propFind->handle($ns.'supported-address-data', function () {
                 return new Xml\Property\SupportedAddressData();
             });
-            $propFind->handle($ns . 'supported-collation-set', function() {
+            $propFind->handle($ns.'supported-collation-set', function () {
                 return new Xml\Property\SupportedCollationSet();
             });
-
         }
         if ($node instanceof DAVACL\IPrincipal) {
-
             $path = $propFind->getPath();
 
-            $propFind->handle('{' . self::NS_CARDDAV . '}addressbook-home-set', function() use ($path) {
-                return new LocalHref($this->getAddressBookHomeForPrincipal($path) . '/');
-            });
-
-            if ($this->directories) $propFind->handle('{' . self::NS_CARDDAV . '}directory-gateway', function() {
-                return new LocalHref($this->directories);
+            $propFind->handle('{'.self::NS_CARDDAV.'}addressbook-home-set', function () use ($path) {
+                return new LocalHref($this->getAddressBookHomeForPrincipal($path).'/');
             });
 
+            if ($this->directories) {
+                $propFind->handle('{'.self::NS_CARDDAV.'}directory-gateway', function () {
+                    return new LocalHref($this->directories);
+                });
+            }
         }
 
         if ($node instanceof ICard) {
-
             // The address-data property is not supposed to be a 'real'
             // property, but in large chunks of the spec it does act as such.
             // Therefore we simply expose it as a property.
-            $propFind->handle('{' . self::NS_CARDDAV . '}address-data', function() use ($node) {
+            $propFind->handle('{'.self::NS_CARDDAV.'}address-data', function () use ($node) {
                 $val = $node->get();
-                if (is_resource($val))
+                if (is_resource($val)) {
                     $val = stream_get_contents($val);
+                }
 
                 return $val;
-
             });
-
         }
-
     }
 
     /**
-     * This functions handles REPORT requests specific to CardDAV
+     * This functions handles REPORT requests specific to CardDAV.
      *
-     * @param string $reportName
+     * @param string   $reportName
      * @param \DOMNode $dom
-     * @param mixed $path
+     * @param mixed    $path
+     *
      * @return bool
      */
-    function report($reportName, $dom, $path) {
-
+    public function report($reportName, $dom, $path)
+    {
         switch ($reportName) {
-            case '{' . self::NS_CARDDAV . '}addressbook-multiget' :
+            case '{'.self::NS_CARDDAV.'}addressbook-multiget':
                 $this->server->transactionType = 'report-addressbook-multiget';
                 $this->addressbookMultiGetReport($dom);
+
                 return false;
-            case '{' . self::NS_CARDDAV . '}addressbook-query' :
+            case '{'.self::NS_CARDDAV.'}addressbook-query':
                 $this->server->transactionType = 'report-addressbook-query';
                 $this->addressBookQueryReport($dom);
+
                 return false;
-            default :
+            default:
                 return;
-
         }
-
-
     }
 
     /**
-     * Returns the addressbook home for a given principal
+     * Returns the addressbook home for a given principal.
      *
      * @param string $principal
+     *
      * @return string
      */
-    protected function getAddressbookHomeForPrincipal($principal) {
-
-        list(, $principalId) = \Sabre\HTTP\URLUtil::splitPath($principal);
-        return self::ADDRESSBOOK_ROOT . '/' . $principalId;
+    protected function getAddressbookHomeForPrincipal($principal)
+    {
+        list(, $principalId) = Uri\split($principal);
 
+        return self::ADDRESSBOOK_ROOT.'/'.$principalId;
     }
 
-
     /**
      * This function handles the addressbook-multiget REPORT.
      *
@@ -231,14 +225,13 @@ class Plugin extends DAV\ServerPlugin {
      * of urls. Effectively avoiding a lot of redundant requests.
      *
      * @param Xml\Request\AddressBookMultiGetReport $report
-     * @return void
      */
-    function addressbookMultiGetReport($report) {
-
+    public function addressbookMultiGetReport($report)
+    {
         $contentType = $report->contentType;
         $version = $report->version;
         if ($version) {
-            $contentType .= '; version=' . $version;
+            $contentType .= '; version='.$version;
         }
 
         $vcardType = $this->negotiateVCard(
@@ -251,17 +244,13 @@ class Plugin extends DAV\ServerPlugin {
             $report->hrefs
         );
         foreach ($this->server->getPropertiesForMultiplePaths($paths, $report->properties) as $props) {
-
-            if (isset($props['200']['{' . self::NS_CARDDAV . '}address-data'])) {
-
-                $props['200']['{' . self::NS_CARDDAV . '}address-data'] = $this->convertVCard(
-                    $props[200]['{' . self::NS_CARDDAV . '}address-data'],
+            if (isset($props['200']['{'.self::NS_CARDDAV.'}address-data'])) {
+                $props['200']['{'.self::NS_CARDDAV.'}address-data'] = $this->convertVCard(
+                    $props[200]['{'.self::NS_CARDDAV.'}address-data'],
                     $vcardType
                 );
-
             }
             $propertyList[] = $props;
-
         }
 
         $prefer = $this->server->getHTTPPrefer();
@@ -269,8 +258,7 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setStatus(207);
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setHeader('Vary', 'Brief,Prefer');
-        $this->server->httpResponse->setBody($this->server->generateMultiStatus($propertyList, $prefer['return'] === 'minimal'));
-
+        $this->server->httpResponse->setBody($this->server->generateMultiStatus($propertyList, 'minimal' === $prefer['return']));
     }
 
     /**
@@ -279,20 +267,19 @@ class Plugin extends DAV\ServerPlugin {
      * This plugin uses this method to ensure that Card nodes receive valid
      * vcard data.
      *
-     * @param string $path
+     * @param string    $path
      * @param DAV\IFile $node
-     * @param resource $data
-     * @param bool $modified Should be set to true, if this event handler
-     *                       changed &$data.
-     * @return void
+     * @param resource  $data
+     * @param bool      $modified should be set to true, if this event handler
+     *                            changed &$data
      */
-    function beforeWriteContent($path, DAV\IFile $node, &$data, &$modified) {
-
-        if (!$node instanceof ICard)
+    public function beforeWriteContent($path, DAV\IFile $node, &$data, &$modified)
+    {
+        if (!$node instanceof ICard) {
             return;
+        }
 
         $this->validateVCard($data, $modified);
-
     }
 
     /**
@@ -301,20 +288,19 @@ class Plugin extends DAV\ServerPlugin {
      * This plugin uses this method to ensure that Card nodes receive valid
      * vcard data.
      *
-     * @param string $path
-     * @param resource $data
+     * @param string          $path
+     * @param resource        $data
      * @param DAV\ICollection $parentNode
-     * @param bool $modified Should be set to true, if this event handler
-     *                       changed &$data.
-     * @return void
+     * @param bool            $modified   should be set to true, if this event handler
+     *                                    changed &$data
      */
-    function beforeCreateFile($path, &$data, DAV\ICollection $parentNode, &$modified) {
-
-        if (!$parentNode instanceof IAddressBook)
+    public function beforeCreateFile($path, &$data, DAV\ICollection $parentNode, &$modified)
+    {
+        if (!$parentNode instanceof IAddressBook) {
             return;
+        }
 
         $this->validateVCard($data, $modified);
-
     }
 
     /**
@@ -323,12 +309,11 @@ class Plugin extends DAV\ServerPlugin {
      * An exception is thrown if it's not.
      *
      * @param resource|string $data
-     * @param bool $modified Should be set to true, if this event handler
-     *                       changed &$data.
-     * @return void
+     * @param bool            $modified should be set to true, if this event handler
+     *                                  changed &$data
      */
-    protected function validateVCard(&$data, &$modified) {
-
+    protected function validateVCard(&$data, &$modified)
+    {
         // If it's a stream, we convert it to a string first.
         if (is_resource($data)) {
             $data = stream_get_contents($data);
@@ -337,10 +322,9 @@ class Plugin extends DAV\ServerPlugin {
         $before = $data;
 
         try {
-
             // If the data starts with a [, we can reasonably assume we're dealing
             // with a jCal object.
-            if (substr($data, 0, 1) === '[') {
+            if ('[' === substr($data, 0, 1)) {
                 $vobj = VObject\Reader::readJson($data);
 
                 // Converting $data back to iCalendar, as that's what we
@@ -350,21 +334,18 @@ class Plugin extends DAV\ServerPlugin {
             } else {
                 $vobj = VObject\Reader::read($data);
             }
-
         } catch (VObject\ParseException $e) {
-
-            throw new DAV\Exception\UnsupportedMediaType('This resource only supports valid vCard or jCard data. Parse error: ' . $e->getMessage());
-
+            throw new DAV\Exception\UnsupportedMediaType('This resource only supports valid vCard or jCard data. Parse error: '.$e->getMessage());
         }
 
-        if ($vobj->name !== 'VCARD') {
+        if ('VCARD' !== $vobj->name) {
             throw new DAV\Exception\UnsupportedMediaType('This collection can only support vcard objects.');
         }
 
         $options = VObject\Node::PROFILE_CARDDAV;
         $prefer = $this->server->getHTTPPrefer();
 
-        if ($prefer['handling'] !== 'strict') {
+        if ('strict' !== $prefer['handling']) {
             $options |= VObject\Node::REPAIR;
         }
 
@@ -376,7 +357,6 @@ class Plugin extends DAV\ServerPlugin {
         // $messages contains a list of problems with the vcard, along with
         // their severity.
         foreach ($messages as $message) {
-
             if ($message['level'] > $highestLevel) {
                 // Recording the highest reported error level.
                 $highestLevel = $message['level'];
@@ -384,30 +364,27 @@ class Plugin extends DAV\ServerPlugin {
             }
 
             switch ($message['level']) {
-
-                case 1 :
+                case 1:
                     // Level 1 means that there was a problem, but it was repaired.
                     $modified = true;
                     break;
-                case 2 :
+                case 2:
                     // Level 2 means a warning, but not critical
                     break;
-                case 3 :
+                case 3:
                     // Level 3 means a critical error
-                    throw new DAV\Exception\UnsupportedMediaType('Validation error in vCard: ' . $message['message']);
-
+                    throw new DAV\Exception\UnsupportedMediaType('Validation error in vCard: '.$message['message']);
             }
-
         }
         if ($warningMessage) {
             $this->server->httpResponse->setHeader(
                 'X-Sabre-Ew-Gross',
-                'vCard validation warning: ' . $warningMessage
+                'vCard validation warning: '.$warningMessage
             );
 
             // Re-serializing object.
             $data = $vobj->serialize();
-            if (!$modified && strcmp($data, $before) !== 0) {
+            if (!$modified && 0 !== strcmp($data, $before)) {
                 // This ensures that the system does not send an ETag back.
                 $modified = true;
             }
@@ -417,23 +394,21 @@ class Plugin extends DAV\ServerPlugin {
         $vobj->destroy();
     }
 
-
     /**
-     * This function handles the addressbook-query REPORT
+     * This function handles the addressbook-query REPORT.
      *
      * This report is used by the client to filter an addressbook based on a
      * complex query.
      *
      * @param Xml\Request\AddressBookQueryReport $report
-     * @return void
      */
-    protected function addressbookQueryReport($report) {
-
+    protected function addressbookQueryReport($report)
+    {
         $depth = $this->server->getHTTPDepth(0);
 
-        if ($depth == 0) {
+        if (0 == $depth) {
             $candidateNodes = [
-                $this->server->tree->getNodeForPath($this->server->getRequestUri())
+                $this->server->tree->getNodeForPath($this->server->getRequestUri()),
             ];
             if (!$candidateNodes[0] instanceof ICard) {
                 throw new ReportNotSupported('The addressbook-query report is not supported on this url with Depth: 0');
@@ -444,7 +419,7 @@ class Plugin extends DAV\ServerPlugin {
 
         $contentType = $report->contentType;
         if ($report->version) {
-            $contentType .= '; version=' . $report->version;
+            $contentType .= '; version='.$report->version;
         }
 
         $vcardType = $this->negotiateVCard(
@@ -453,9 +428,9 @@ class Plugin extends DAV\ServerPlugin {
 
         $validNodes = [];
         foreach ($candidateNodes as $node) {
-
-            if (!$node instanceof ICard)
+            if (!$node instanceof ICard) {
                 continue;
+            }
 
             $blob = $node->get();
             if (is_resource($blob)) {
@@ -472,31 +447,26 @@ class Plugin extends DAV\ServerPlugin {
                 // We hit the maximum number of items, we can stop now.
                 break;
             }
-
         }
 
         $result = [];
         foreach ($validNodes as $validNode) {
-
-            if ($depth == 0) {
+            if (0 == $depth) {
                 $href = $this->server->getRequestUri();
             } else {
-                $href = $this->server->getRequestUri() . '/' . $validNode->getName();
+                $href = $this->server->getRequestUri().'/'.$validNode->getName();
             }
 
             list($props) = $this->server->getPropertiesForPath($href, $report->properties, 0);
 
-            if (isset($props[200]['{' . self::NS_CARDDAV . '}address-data'])) {
-
-                $props[200]['{' . self::NS_CARDDAV . '}address-data'] = $this->convertVCard(
-                    $props[200]['{' . self::NS_CARDDAV . '}address-data'],
+            if (isset($props[200]['{'.self::NS_CARDDAV.'}address-data'])) {
+                $props[200]['{'.self::NS_CARDDAV.'}address-data'] = $this->convertVCard(
+                    $props[200]['{'.self::NS_CARDDAV.'}address-data'],
                     $vcardType,
                     $report->addressDataProperties
                 );
-
             }
             $result[] = $props;
-
         }
 
         $prefer = $this->server->getHTTPPrefer();
@@ -504,26 +474,26 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setStatus(207);
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setHeader('Vary', 'Brief,Prefer');
-        $this->server->httpResponse->setBody($this->server->generateMultiStatus($result, $prefer['return'] === 'minimal'));
-
+        $this->server->httpResponse->setBody($this->server->generateMultiStatus($result, 'minimal' === $prefer['return']));
     }
 
     /**
      * Validates if a vcard makes it throught a list of filters.
      *
      * @param string $vcardData
-     * @param array $filters
-     * @param string $test anyof or allof (which means OR or AND)
+     * @param array  $filters
+     * @param string $test      anyof or allof (which means OR or AND)
+     *
      * @return bool
      */
-    function validateFilters($vcardData, array $filters, $test) {
-
-
-        if (!$filters) return true;
+    public function validateFilters($vcardData, array $filters, $test)
+    {
+        if (!$filters) {
+            return true;
+        }
         $vcard = VObject\Reader::read($vcardData);
 
         foreach ($filters as $filter) {
-
             $isDefined = isset($vcard->{$filter['name']});
             if ($filter['is-not-defined']) {
                 if ($isDefined) {
@@ -532,12 +502,9 @@ class Plugin extends DAV\ServerPlugin {
                     $success = true;
                 }
             } elseif ((!$filter['param-filters'] && !$filter['text-matches']) || !$isDefined) {
-
                 // We only need to check for existence
                 $success = $isDefined;
-
             } else {
-
                 $vProperties = $vcard->select($filter['name']);
 
                 $results = [];
@@ -546,44 +513,40 @@ class Plugin extends DAV\ServerPlugin {
                 }
                 if ($filter['text-matches']) {
                     $texts = [];
-                    foreach ($vProperties as $vProperty)
+                    foreach ($vProperties as $vProperty) {
                         $texts[] = $vProperty->getValue();
+                    }
 
                     $results[] = $this->validateTextMatches($texts, $filter['text-matches'], $filter['test']);
                 }
 
-                if (count($results) === 1) {
+                if (1 === count($results)) {
                     $success = $results[0];
                 } else {
-                    if ($filter['test'] === 'anyof') {
+                    if ('anyof' === $filter['test']) {
                         $success = $results[0] || $results[1];
                     } else {
                         $success = $results[0] && $results[1];
                     }
                 }
-
             } // else
 
             // There are two conditions where we can already determine whether
             // or not this filter succeeds.
-            if ($test === 'anyof' && $success) {
-
+            if ('anyof' === $test && $success) {
                 // Destroy circular references to PHP will GC the object.
                 $vcard->destroy();
 
                 return true;
             }
-            if ($test === 'allof' && !$success) {
-
+            if ('allof' === $test && !$success) {
                 // Destroy circular references to PHP will GC the object.
                 $vcard->destroy();
 
                 return false;
             }
-
         } // foreach
 
-
         // Destroy circular references to PHP will GC the object.
         $vcard->destroy();
 
@@ -592,8 +555,7 @@ class Plugin extends DAV\ServerPlugin {
         //
         // This implies for 'anyof' that the test failed, and for 'allof' that
         // we succeeded. Sounds weird, but makes sense.
-        return $test === 'allof';
-
+        return 'allof' === $test;
     }
 
     /**
@@ -602,19 +564,22 @@ class Plugin extends DAV\ServerPlugin {
      * @todo currently we're only validating the first parameter of the passed
      *       property. Any subsequence parameters with the same name are
      *       ignored.
-     * @param array $vProperties
-     * @param array $filters
+     *
+     * @param array  $vProperties
+     * @param array  $filters
      * @param string $test
+     *
      * @return bool
      */
-    protected function validateParamFilters(array $vProperties, array $filters, $test) {
-
+    protected function validateParamFilters(array $vProperties, array $filters, $test)
+    {
         foreach ($filters as $filter) {
-
             $isDefined = false;
             foreach ($vProperties as $vProperty) {
                 $isDefined = isset($vProperty[$filter['name']]);
-                if ($isDefined) break;
+                if ($isDefined) {
+                    break;
+                }
             }
 
             if ($filter['is-not-defined']) {
@@ -624,35 +589,32 @@ class Plugin extends DAV\ServerPlugin {
                     $success = true;
                 }
 
-            // If there's no text-match, we can just check for existence
+                // If there's no text-match, we can just check for existence
             } elseif (!$filter['text-match'] || !$isDefined) {
-
                 $success = $isDefined;
-
             } else {
-
                 $success = false;
                 foreach ($vProperties as $vProperty) {
                     // If we got all the way here, we'll need to validate the
                     // text-match filter.
                     $success = DAV\StringUtil::textMatch($vProperty[$filter['name']]->getValue(), $filter['text-match']['value'], $filter['text-match']['collation'], $filter['text-match']['match-type']);
-                    if ($success) break;
+                    if ($success) {
+                        break;
+                    }
                 }
                 if ($filter['text-match']['negate-condition']) {
                     $success = !$success;
                 }
-
             } // else
 
             // There are two conditions where we can already determine whether
             // or not this filter succeeds.
-            if ($test === 'anyof' && $success) {
+            if ('anyof' === $test && $success) {
                 return true;
             }
-            if ($test === 'allof' && !$success) {
+            if ('allof' === $test && !$success) {
                 return false;
             }
-
         }
 
         // If we got all the way here, it means we haven't been able to
@@ -660,40 +622,41 @@ class Plugin extends DAV\ServerPlugin {
         //
         // This implies for 'anyof' that the test failed, and for 'allof' that
         // we succeeded. Sounds weird, but makes sense.
-        return $test === 'allof';
-
+        return 'allof' === $test;
     }
 
     /**
      * Validates if a text-filter can be applied to a specific property.
      *
-     * @param array $texts
-     * @param array $filters
+     * @param array  $texts
+     * @param array  $filters
      * @param string $test
+     *
      * @return bool
      */
-    protected function validateTextMatches(array $texts, array $filters, $test) {
-
+    protected function validateTextMatches(array $texts, array $filters, $test)
+    {
         foreach ($filters as $filter) {
-
             $success = false;
             foreach ($texts as $haystack) {
                 $success = DAV\StringUtil::textMatch($haystack, $filter['value'], $filter['collation'], $filter['match-type']);
 
                 // Breaking on the first match
-                if ($success) break;
+                if ($success) {
+                    break;
+                }
             }
             if ($filter['negate-condition']) {
                 $success = !$success;
             }
 
-            if ($success && $test === 'anyof')
+            if ($success && 'anyof' === $test) {
                 return true;
+            }
 
-            if (!$success && $test == 'allof')
+            if (!$success && 'allof' == $test) {
                 return false;
-
-
+            }
         }
 
         // If we got all the way here, it means we haven't been able to
@@ -701,8 +664,7 @@ class Plugin extends DAV\ServerPlugin {
         //
         // This implies for 'anyof' that the test failed, and for 'allof' that
         // we succeeded. Sounds weird, but makes sense.
-        return $test === 'allof';
-
+        return 'allof' === $test;
     }
 
     /**
@@ -712,24 +674,24 @@ class Plugin extends DAV\ServerPlugin {
      * propfind has been done.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
-     * @return void
+     * @param DAV\INode    $node
      */
-    function propFindLate(DAV\PropFind $propFind, DAV\INode $node) {
-
+    public function propFindLate(DAV\PropFind $propFind, DAV\INode $node)
+    {
         // If the request was made using the SOGO connector, we must rewrite
         // the content-type property. By default SabreDAV will send back
         // text/x-vcard; charset=utf-8, but for SOGO we must strip that last
         // part.
-        if (strpos($this->server->httpRequest->getHeader('User-Agent'), 'Thunderbird') === false) {
+        if (false === strpos((string) $this->server->httpRequest->getHeader('User-Agent'), 'Thunderbird')) {
             return;
         }
         $contentType = $propFind->get('{DAV:}getcontenttype');
-        list($part) = explode(';', $contentType);
-        if ($part === 'text/x-vcard' || $part === 'text/vcard') {
-            $propFind->set('{DAV:}getcontenttype', 'text/x-vcard');
+        if (null !== $contentType) {
+            list($part) = explode(';', $contentType);
+            if ('text/x-vcard' === $part || 'text/vcard' === $part) {
+                $propFind->set('{DAV:}getcontenttype', 'text/x-vcard');
+            }
         }
-
     }
 
     /**
@@ -738,18 +700,20 @@ class Plugin extends DAV\ServerPlugin {
      * can use to create new addressbooks.
      *
      * @param DAV\INode $node
-     * @param string $output
+     * @param string    $output
+     *
      * @return bool
      */
-    function htmlActionsPanel(DAV\INode $node, &$output) {
-
-        if (!$node instanceof AddressBookHome)
+    public function htmlActionsPanel(DAV\INode $node, &$output)
+    {
+        if (!$node instanceof AddressBookHome) {
             return;
+        }
 
         $output .= '<tr><td colspan="2"><form method="post" action="">
             <h3>Create new address book</h3>
             <input type="hidden" name="sabreAction" value="mkcol" />
-            <input type="hidden" name="resourceType" value="{DAV:}collection,{' . self::NS_CARDDAV . '}addressbook" />
+            <input type="hidden" name="resourceType" value="{DAV:}collection,{'.self::NS_CARDDAV.'}addressbook" />
             <label>Name (uri):</label> <input type="text" name="name" /><br />
             <label>Display name:</label> <input type="text" name="{DAV:}displayname" /><br />
             <input type="submit" value="create" />
@@ -757,7 +721,6 @@ class Plugin extends DAV\ServerPlugin {
             </td></tr>';
 
         return false;
-
     }
 
     /**
@@ -765,13 +728,13 @@ class Plugin extends DAV\ServerPlugin {
      *
      * This is used to transform data into jCal, if this was requested.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function httpAfterGet(RequestInterface $request, ResponseInterface $response) {
-
-        if (strpos($response->getHeader('Content-Type'), 'text/vcard') === false) {
+    public function httpAfterGet(RequestInterface $request, ResponseInterface $response)
+    {
+        $contentType = $response->getHeader('Content-Type');
+        if (null === $contentType || false === strpos($contentType, 'text/vcard')) {
             return;
         }
 
@@ -783,9 +746,8 @@ class Plugin extends DAV\ServerPlugin {
         );
 
         $response->setBody($newBody);
-        $response->setHeader('Content-Type', $mimeType . '; charset=utf-8');
+        $response->setHeader('Content-Type', $mimeType.'; charset=utf-8');
         $response->setHeader('Content-Length', strlen($newBody));
-
     }
 
     /**
@@ -800,11 +762,12 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @param string $input
      * @param string $mimeType
+     *
      * @return string
      */
-    protected function negotiateVCard($input, &$mimeType = null) {
-
-        $result = HTTP\Util::negotiate(
+    protected function negotiateVCard($input, &$mimeType = null)
+    {
+        $result = HTTP\negotiateContentType(
             $input,
             [
                 // Most often used mime-type. Version 3
@@ -823,41 +786,41 @@ class Plugin extends DAV\ServerPlugin {
 
         $mimeType = $result;
         switch ($result) {
-
-            default :
-            case 'text/x-vcard' :
-            case 'text/vcard' :
-            case 'text/vcard; version=3.0' :
+            default:
+            case 'text/x-vcard':
+            case 'text/vcard':
+            case 'text/vcard; version=3.0':
                 $mimeType = 'text/vcard';
+
                 return 'vcard3';
-            case 'text/vcard; version=4.0' :
+            case 'text/vcard; version=4.0':
                 return 'vcard4';
-            case 'application/vcard+json' :
+            case 'application/vcard+json':
                 return 'jcard';
 
         // @codeCoverageIgnoreStart
         }
         // @codeCoverageIgnoreEnd
-
     }
 
     /**
      * Converts a vcard blob to a different version, or jcard.
      *
      * @param string|resource $data
-     * @param string $target
-     * @param array $propertiesFilter
+     * @param string          $target
+     * @param array           $propertiesFilter
+     *
      * @return string
      */
-    protected function convertVCard($data, $target, array $propertiesFilter = null) {
-
+    protected function convertVCard($data, $target, array $propertiesFilter = null)
+    {
         if (is_resource($data)) {
             $data = stream_get_contents($data);
         }
         $input = VObject\Reader::read($data);
         if (!empty($propertiesFilter)) {
             $propertiesFilter = array_merge(['UID', 'VERSION', 'FN'], $propertiesFilter);
-            $keys = array_unique(array_map(function($child) {
+            $keys = array_unique(array_map(function ($child) {
                 return $child->name;
             }, $input->children()));
             $keys = array_diff($keys, $propertiesFilter);
@@ -868,38 +831,36 @@ class Plugin extends DAV\ServerPlugin {
         }
         $output = null;
         try {
-
             switch ($target) {
-                default :
-                case 'vcard3' :
-                    if ($input->getDocumentType() === VObject\Document::VCARD30) {
+                default:
+                case 'vcard3':
+                    if (VObject\Document::VCARD30 === $input->getDocumentType()) {
                         // Do nothing
                         return $data;
                     }
                     $output = $input->convert(VObject\Document::VCARD30);
+
                     return $output->serialize();
-                case 'vcard4' :
-                    if ($input->getDocumentType() === VObject\Document::VCARD40) {
+                case 'vcard4':
+                    if (VObject\Document::VCARD40 === $input->getDocumentType()) {
                         // Do nothing
                         return $data;
                     }
                     $output = $input->convert(VObject\Document::VCARD40);
+
                     return $output->serialize();
-                case 'jcard' :
+                case 'jcard':
                     $output = $input->convert(VObject\Document::VCARD40);
-                    return json_encode($output);
 
+                    return json_encode($output);
             }
-
         } finally {
-
             // Destroy circular references to PHP will GC the object.
             $input->destroy();
             if (!is_null($output)) {
                 $output->destroy();
             }
         }
-
     }
 
     /**
@@ -910,10 +871,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'carddav';
-
     }
 
     /**
@@ -927,14 +887,12 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds support for CardDAV (rfc6352)',
-            'link'        => 'http://sabre.io/dav/carddav/',
+            'link' => 'http://sabre.io/dav/carddav/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php b/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php
index 2d61db6ac..194927c53 100644
--- a/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php
+++ b/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
@@ -8,7 +10,7 @@ use Sabre\HTTP\ResponseInterface;
 use Sabre\VObject;
 
 /**
- * VCF Exporter
+ * VCF Exporter.
  *
  * This plugin adds the ability to export entire address books as .vcf files.
  * This is useful for clients that don't support CardDAV yet. They often do
@@ -19,28 +21,27 @@ use Sabre\VObject;
  * @author Thomas Tanghus (http://tanghus.net/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VCFExportPlugin extends DAV\ServerPlugin {
-
+class VCFExportPlugin extends DAV\ServerPlugin
+{
     /**
-     * Reference to Server class
+     * Reference to Server class.
      *
      * @var DAV\Server
      */
     protected $server;
 
     /**
-     * Initializes the plugin and registers event handlers
+     * Initializes the plugin and registers event handlers.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
         $this->server->on('method:GET', [$this, 'httpGet'], 90);
-        $server->on('browserButtonActions', function($path, $node, &$actions) {
+        $server->on('browserButtonActions', function ($path, $node, &$actions) {
             if ($node instanceof IAddressBook) {
-                $actions .= '<a href="' . htmlspecialchars($path, ENT_QUOTES, 'UTF-8') . '?export"><span class="oi" data-glyph="book"></span></a>';
+                $actions .= '<a href="'.htmlspecialchars($path, ENT_QUOTES, 'UTF-8').'?export"><span class="oi" data-glyph="book"></span></a>';
             }
         });
     }
@@ -48,20 +49,25 @@ class VCFExportPlugin extends DAV\ServerPlugin {
     /**
      * Intercepts GET requests on addressbook urls ending with ?export.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpGet(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGet(RequestInterface $request, ResponseInterface $response)
+    {
         $queryParams = $request->getQueryParameters();
-        if (!array_key_exists('export', $queryParams)) return;
+        if (!array_key_exists('export', $queryParams)) {
+            return;
+        }
 
         $path = $request->getPath();
 
         $node = $this->server->tree->getNodeForPath($path);
 
-        if (!($node instanceof IAddressBook)) return;
+        if (!($node instanceof IAddressBook)) {
+            return;
+        }
 
         $this->server->transactionType = 'get-addressbook-export';
 
@@ -71,7 +77,7 @@ class VCFExportPlugin extends DAV\ServerPlugin {
         }
 
         $nodes = $this->server->getPropertiesForPath($path, [
-            '{' . Plugin::NS_CARDDAV . '}address-data',
+            '{'.Plugin::NS_CARDDAV.'}address-data',
         ], 1);
 
         $format = 'text/directory';
@@ -91,9 +97,9 @@ class VCFExportPlugin extends DAV\ServerPlugin {
             '',
             $node->getName()
         );
-        $filename .= '-' . date('Y-m-d') . $filenameExtension;
+        $filename .= '-'.date('Y-m-d').$filenameExtension;
 
-        $response->setHeader('Content-Disposition', 'attachment; filename="' . $filename . '"');
+        $response->setHeader('Content-Disposition', 'attachment; filename="'.$filename.'"');
         $response->setHeader('Content-Type', $format);
 
         $response->setStatus(200);
@@ -101,25 +107,24 @@ class VCFExportPlugin extends DAV\ServerPlugin {
 
         // Returning false to break the event chain
         return false;
-
     }
 
     /**
-     * Merges all vcard objects, and builds one big vcf export
+     * Merges all vcard objects, and builds one big vcf export.
      *
      * @param array $nodes
+     *
      * @return string
      */
-    function generateVCF(array $nodes) {
-
-        $output = "";
+    public function generateVCF(array $nodes)
+    {
+        $output = '';
 
         foreach ($nodes as $node) {
-
-            if (!isset($node[200]['{' . Plugin::NS_CARDDAV . '}address-data'])) {
+            if (!isset($node[200]['{'.Plugin::NS_CARDDAV.'}address-data'])) {
                 continue;
             }
-            $nodeData = $node[200]['{' . Plugin::NS_CARDDAV . '}address-data'];
+            $nodeData = $node[200]['{'.Plugin::NS_CARDDAV.'}address-data'];
 
             // Parsing this node so VObject can clean up the output.
             $vcard = VObject\Reader::read($nodeData);
@@ -127,11 +132,9 @@ class VCFExportPlugin extends DAV\ServerPlugin {
 
             // Destroy circular references to PHP will GC the object.
             $vcard->destroy();
-
         }
 
         return $output;
-
     }
 
     /**
@@ -142,10 +145,9 @@ class VCFExportPlugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'vcf-export';
-
     }
 
     /**
@@ -159,14 +161,12 @@ class VCFExportPlugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds the ability to export CardDAV addressbooks as a single vCard file.',
-            'link'        => 'http://sabre.io/dav/vcf-export-plugin/',
+            'link' => 'http://sabre.io/dav/vcf-export-plugin/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Xml/Filter/AddressData.php b/vendor/sabre/dav/lib/CardDAV/Xml/Filter/AddressData.php
index 5b7b2ee17..f1b651e76 100644
--- a/vendor/sabre/dav/lib/CardDAV/Xml/Filter/AddressData.php
+++ b/vendor/sabre/dav/lib/CardDAV/Xml/Filter/AddressData.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Xml\Filter;
 
 use Sabre\Xml\Reader;
@@ -21,8 +23,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AddressData implements XmlDeserializable {
-
+class AddressData implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -42,25 +44,25 @@ class AddressData implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
             'contentType' => $reader->getAttribute('content-type') ?: 'text/vcard',
-            'version'     => $reader->getAttribute('version') ?: '3.0',
+            'version' => $reader->getAttribute('version') ?: '3.0',
         ];
 
-        $elems = (array)$reader->parseInnerTree();
-        $elems = array_filter($elems, function($element) {
-            return $element['name'] === '{urn:ietf:params:xml:ns:carddav}prop' &&
+        $elems = (array) $reader->parseInnerTree();
+        $elems = array_filter($elems, function ($element) {
+            return '{urn:ietf:params:xml:ns:carddav}prop' === $element['name'] &&
                 isset($element['attributes']['name']);
         });
-        $result['addressDataProperties'] = array_map(function($element) {
+        $result['addressDataProperties'] = array_map(function ($element) {
             return $element['attributes']['name'];
         }, $elems);
 
         return $result;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Xml/Filter/ParamFilter.php b/vendor/sabre/dav/lib/CardDAV/Xml/Filter/ParamFilter.php
index 936e26917..2d39dea7f 100644
--- a/vendor/sabre/dav/lib/CardDAV/Xml/Filter/ParamFilter.php
+++ b/vendor/sabre/dav/lib/CardDAV/Xml/Filter/ParamFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Xml\Filter;
 
 use Sabre\CardDAV\Plugin;
@@ -21,8 +23,8 @@ use Sabre\Xml\Reader;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class ParamFilter implements Element {
-
+abstract class ParamFilter implements Element
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -42,14 +44,15 @@ abstract class ParamFilter implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
+            'name' => null,
             'is-not-defined' => false,
-            'text-match'     => null,
+            'text-match' => null,
         ];
 
         $att = $reader->parseAttributes();
@@ -57,33 +60,29 @@ abstract class ParamFilter implements Element {
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CARDDAV . '}is-not-defined' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CARDDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CARDDAV . '}text-match' :
+                case '{'.Plugin::NS_CARDDAV.'}text-match':
                     $matchType = isset($elem['attributes']['match-type']) ? $elem['attributes']['match-type'] : 'contains';
 
                     if (!in_array($matchType, ['contains', 'equals', 'starts-with', 'ends-with'])) {
-                        throw new BadRequest('Unknown match-type: ' . $matchType);
+                        throw new BadRequest('Unknown match-type: '.$matchType);
                     }
                     $result['text-match'] = [
-                        'negate-condition' => isset($elem['attributes']['negate-condition']) && $elem['attributes']['negate-condition'] === 'yes',
-                        'collation'        => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;unicode-casemap',
-                        'value'            => $elem['value'],
-                        'match-type'       => $matchType,
+                        'negate-condition' => isset($elem['attributes']['negate-condition']) && 'yes' === $elem['attributes']['negate-condition'],
+                        'collation' => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;unicode-casemap',
+                        'value' => $elem['value'],
+                        'match-type' => $matchType,
                     ];
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Xml/Filter/PropFilter.php b/vendor/sabre/dav/lib/CardDAV/Xml/Filter/PropFilter.php
index d7799429d..a22a577c9 100644
--- a/vendor/sabre/dav/lib/CardDAV/Xml/Filter/PropFilter.php
+++ b/vendor/sabre/dav/lib/CardDAV/Xml/Filter/PropFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Xml\Filter;
 
 use Sabre\CardDAV\Plugin;
@@ -21,8 +23,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PropFilter implements XmlDeserializable {
-
+class PropFilter implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -42,57 +44,54 @@ class PropFilter implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
-            'test'           => 'anyof',
+            'name' => null,
+            'test' => 'anyof',
             'is-not-defined' => false,
-            'param-filters'  => [],
-            'text-matches'   => [],
+            'param-filters' => [],
+            'text-matches' => [],
         ];
 
         $att = $reader->parseAttributes();
         $result['name'] = $att['name'];
 
-        if (isset($att['test']) && $att['test'] === 'allof') {
+        if (isset($att['test']) && 'allof' === $att['test']) {
             $result['test'] = 'allof';
         }
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CARDDAV . '}param-filter' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CARDDAV.'}param-filter':
                     $result['param-filters'][] = $elem['value'];
                     break;
-                case '{' . Plugin::NS_CARDDAV . '}is-not-defined' :
+                case '{'.Plugin::NS_CARDDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CARDDAV . '}text-match' :
+                case '{'.Plugin::NS_CARDDAV.'}text-match':
                     $matchType = isset($elem['attributes']['match-type']) ? $elem['attributes']['match-type'] : 'contains';
 
                     if (!in_array($matchType, ['contains', 'equals', 'starts-with', 'ends-with'])) {
-                        throw new BadRequest('Unknown match-type: ' . $matchType);
+                        throw new BadRequest('Unknown match-type: '.$matchType);
                     }
                     $result['text-matches'][] = [
-                        'negate-condition' => isset($elem['attributes']['negate-condition']) && $elem['attributes']['negate-condition'] === 'yes',
-                        'collation'        => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;unicode-casemap',
-                        'value'            => $elem['value'],
-                        'match-type'       => $matchType,
+                        'negate-condition' => isset($elem['attributes']['negate-condition']) && 'yes' === $elem['attributes']['negate-condition'],
+                        'collation' => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;unicode-casemap',
+                        'value' => $elem['value'],
+                        'match-type' => $matchType,
                     ];
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedAddressData.php b/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedAddressData.php
index aecd8a09f..9d0051698 100644
--- a/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedAddressData.php
+++ b/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedAddressData.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Xml\Property;
 
 use Sabre\CardDAV\Plugin;
@@ -7,7 +9,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * Supported-address-data property
+ * Supported-address-data property.
  *
  * This property is a representation of the supported-address-data property
  * in the CardDAV namespace.
@@ -20,22 +22,22 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedAddressData implements XmlSerializable {
-
+class SupportedAddressData implements XmlSerializable
+{
     /**
-     * supported versions
+     * supported versions.
      *
      * @var array
      */
     protected $supportedData = [];
 
     /**
-     * Creates the property
+     * Creates the property.
      *
      * @param array|null $supportedData
      */
-    function __construct(array $supportedData = null) {
-
+    public function __construct(array $supportedData = null)
+    {
         if (is_null($supportedData)) {
             $supportedData = [
                 ['contentType' => 'text/vcard', 'version' => '3.0'],
@@ -45,7 +47,6 @@ class SupportedAddressData implements XmlSerializable {
         }
 
         $this->supportedData = $supportedData;
-
     }
 
     /**
@@ -65,19 +66,16 @@ class SupportedAddressData implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->supportedData as $supported) {
-            $writer->startElement('{' . Plugin::NS_CARDDAV . '}address-data-type');
+            $writer->startElement('{'.Plugin::NS_CARDDAV.'}address-data-type');
             $writer->writeAttributes([
                 'content-type' => $supported['contentType'],
-                'version'      => $supported['version']
+                'version' => $supported['version'],
                 ]);
             $writer->endElement(); // address-data-type
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedCollationSet.php b/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedCollationSet.php
index 778aa2b64..66e451a91 100644
--- a/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedCollationSet.php
+++ b/vendor/sabre/dav/lib/CardDAV/Xml/Property/SupportedCollationSet.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Xml\Property;
 
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * supported-collation-set property
+ * supported-collation-set property.
  *
  * This property is a representation of the supported-collation-set property
  * in the CardDAV namespace.
@@ -15,8 +17,8 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedCollationSet implements XmlSerializable {
-
+class SupportedCollationSet implements XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -34,14 +36,11 @@ class SupportedCollationSet implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach (['i;ascii-casemap', 'i;octet', 'i;unicode-casemap'] as $coll) {
             $writer->writeElement('{urn:ietf:params:xml:ns:carddav}supported-collation', $coll);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookMultiGetReport.php b/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookMultiGetReport.php
index 0115a0107..845796760 100644
--- a/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookMultiGetReport.php
+++ b/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookMultiGetReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Xml\Request;
 
 use Sabre\CardDAV\Plugin;
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AddressBookMultiGetReport implements XmlDeserializable {
-
+class AddressBookMultiGetReport implements XmlDeserializable
+{
     /**
      * An array with requested properties.
      *
@@ -70,44 +72,40 @@ class AddressBookMultiGetReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree([
             '{urn:ietf:params:xml:ns:carddav}address-data' => 'Sabre\\CardDAV\\Xml\\Filter\\AddressData',
-            '{DAV:}prop'                                   => 'Sabre\\Xml\\Element\\KeyValue',
+            '{DAV:}prop' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $newProps = [
-            'hrefs'      => [],
-            'properties' => []
+            'hrefs' => [],
+            'properties' => [],
         ];
 
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $newProps['properties'] = array_keys($elem['value']);
-                    if (isset($elem['value']['{' . Plugin::NS_CARDDAV . '}address-data'])) {
-                        $newProps += $elem['value']['{' . Plugin::NS_CARDDAV . '}address-data'];
+                    if (isset($elem['value']['{'.Plugin::NS_CARDDAV.'}address-data'])) {
+                        $newProps += $elem['value']['{'.Plugin::NS_CARDDAV.'}address-data'];
                     }
                     break;
-                case '{DAV:}href' :
+                case '{DAV:}href':
                     $newProps['hrefs'][] = Uri\resolve($reader->contextUri, $elem['value']);
                     break;
-
             }
-
         }
 
         $obj = new self();
         foreach ($newProps as $key => $value) {
             $obj->$key = $value;
         }
-        return $obj;
 
+        return $obj;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookQueryReport.php b/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookQueryReport.php
index 09fad008a..0e6f26d38 100644
--- a/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookQueryReport.php
+++ b/vendor/sabre/dav/lib/CardDAV/Xml/Request/AddressBookQueryReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Xml\Request;
 
 use Sabre\CardDAV\Plugin;
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AddressBookQueryReport implements XmlDeserializable {
-
+class AddressBookQueryReport implements XmlDeserializable
+{
     /**
      * An array with requested properties.
      *
@@ -64,7 +66,7 @@ class AddressBookQueryReport implements XmlDeserializable {
     public $filters;
 
     /**
-     * The number of results the client wants
+     * The number of results the client wants.
      *
      * null means it wasn't specified, which in most cases means 'all results'.
      *
@@ -73,7 +75,7 @@ class AddressBookQueryReport implements XmlDeserializable {
     public $limit;
 
     /**
-     * Either 'anyof' or 'allof'
+     * Either 'anyof' or 'allof'.
      *
      * @var string
      */
@@ -95,7 +97,6 @@ class AddressBookQueryReport implements XmlDeserializable {
      */
     public $version = null;
 
-
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -115,65 +116,64 @@ class AddressBookQueryReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
-        $elems = (array)$reader->parseInnerTree([
-            '{urn:ietf:params:xml:ns:carddav}prop-filter'  => 'Sabre\\CardDAV\\Xml\\Filter\\PropFilter',
+    public static function xmlDeserialize(Reader $reader)
+    {
+        $elems = (array) $reader->parseInnerTree([
+            '{urn:ietf:params:xml:ns:carddav}prop-filter' => 'Sabre\\CardDAV\\Xml\\Filter\\PropFilter',
             '{urn:ietf:params:xml:ns:carddav}param-filter' => 'Sabre\\CardDAV\\Xml\\Filter\\ParamFilter',
             '{urn:ietf:params:xml:ns:carddav}address-data' => 'Sabre\\CardDAV\\Xml\\Filter\\AddressData',
-            '{DAV:}prop'                                   => 'Sabre\\Xml\\Element\\KeyValue',
+            '{DAV:}prop' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $newProps = [
-            'filters'    => null,
+            'filters' => null,
             'properties' => [],
-            'test'       => 'anyof',
-            'limit'      => null,
+            'test' => 'anyof',
+            'limit' => null,
         ];
 
-        if (!is_array($elems)) $elems = [];
+        if (!is_array($elems)) {
+            $elems = [];
+        }
 
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $newProps['properties'] = array_keys($elem['value']);
-                    if (isset($elem['value']['{' . Plugin::NS_CARDDAV . '}address-data'])) {
-                        $newProps += $elem['value']['{' . Plugin::NS_CARDDAV . '}address-data'];
+                    if (isset($elem['value']['{'.Plugin::NS_CARDDAV.'}address-data'])) {
+                        $newProps += $elem['value']['{'.Plugin::NS_CARDDAV.'}address-data'];
                     }
                     break;
-                case '{' . Plugin::NS_CARDDAV . '}filter' :
+                case '{'.Plugin::NS_CARDDAV.'}filter':
 
                     if (!is_null($newProps['filters'])) {
-                        throw new BadRequest('You can only include 1 {' . Plugin::NS_CARDDAV . '}filter element');
+                        throw new BadRequest('You can only include 1 {'.Plugin::NS_CARDDAV.'}filter element');
                     }
                     if (isset($elem['attributes']['test'])) {
                         $newProps['test'] = $elem['attributes']['test'];
-                        if ($newProps['test'] !== 'allof' && $newProps['test'] !== 'anyof') {
+                        if ('allof' !== $newProps['test'] && 'anyof' !== $newProps['test']) {
                             throw new BadRequest('The "test" attribute must be one of "allof" or "anyof"');
                         }
                     }
 
                     $newProps['filters'] = [];
-                    foreach ((array)$elem['value'] as $subElem) {
-                        if ($subElem['name'] === '{' . Plugin::NS_CARDDAV . '}prop-filter') {
+                    foreach ((array) $elem['value'] as $subElem) {
+                        if ($subElem['name'] === '{'.Plugin::NS_CARDDAV.'}prop-filter') {
                             $newProps['filters'][] = $subElem['value'];
                         }
                     }
                     break;
-                case '{' . Plugin::NS_CARDDAV . '}limit' :
+                case '{'.Plugin::NS_CARDDAV.'}limit':
                     foreach ($elem['value'] as $child) {
-                        if ($child['name'] === '{' . Plugin::NS_CARDDAV . '}nresults') {
-                            $newProps['limit'] = (int)$child['value'];
+                        if ($child['name'] === '{'.Plugin::NS_CARDDAV.'}nresults') {
+                            $newProps['limit'] = (int) $child['value'];
                         }
                     }
                     break;
-
             }
-
         }
 
         if (is_null($newProps['filters'])) {
@@ -184,7 +184,6 @@ class AddressBookQueryReport implements XmlDeserializable {
              */
             //throw new BadRequest('The {' . Plugin::NS_CARDDAV . '}filter element is required for this request');
             $newProps['filters'] = [];
-
         }
 
         $obj = new self();
@@ -193,7 +192,5 @@ class AddressBookQueryReport implements XmlDeserializable {
         }
 
         return $obj;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBasic.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBasic.php
index 40a95f8bf..aa8b1f573 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBasic.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBasic.php
@@ -1,14 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
-use Sabre\DAV;
 use Sabre\HTTP;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * HTTP Basic authentication backend class
+ * HTTP Basic authentication backend class.
  *
  * This class can be used by authentication objects wishing to use HTTP Basic
  * Most of the digest logic is handled, implementors just need to worry about
@@ -19,8 +20,8 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractBasic implements BackendInterface {
-
+abstract class AbstractBasic implements BackendInterface
+{
     /**
      * Authentication Realm.
      *
@@ -39,13 +40,14 @@ abstract class AbstractBasic implements BackendInterface {
     protected $principalPrefix = 'principals/';
 
     /**
-     * Validates a username and password
+     * Validates a username and password.
      *
      * This method should return true or false depending on if login
      * succeeded.
      *
      * @param string $username
      * @param string $password
+     *
      * @return bool
      */
     abstract protected function validateUserPass($username, $password);
@@ -54,12 +56,10 @@ abstract class AbstractBasic implements BackendInterface {
      * Sets the authentication realm for this backend.
      *
      * @param string $realm
-     * @return void
      */
-    function setRealm($realm) {
-
+    public function setRealm($realm)
+    {
         $this->realm = $realm;
-
     }
 
     /**
@@ -86,12 +86,13 @@ abstract class AbstractBasic implements BackendInterface {
      *
      * principals/users/[username]
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function check(RequestInterface $request, ResponseInterface $response) {
-
+    public function check(RequestInterface $request, ResponseInterface $response)
+    {
         $auth = new HTTP\Auth\Basic(
             $this->realm,
             $request,
@@ -103,10 +104,10 @@ abstract class AbstractBasic implements BackendInterface {
             return [false, "No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured"];
         }
         if (!$this->validateUserPass($userpass[0], $userpass[1])) {
-            return [false, "Username or password was incorrect"];
+            return [false, 'Username or password was incorrect'];
         }
-        return [true, $this->principalPrefix . $userpass[0]];
 
+        return [true, $this->principalPrefix.$userpass[0]];
     }
 
     /**
@@ -126,19 +127,16 @@ abstract class AbstractBasic implements BackendInterface {
      * append your own WWW-Authenticate header instead of overwriting the
      * existing one.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function challenge(RequestInterface $request, ResponseInterface $response) {
-
+    public function challenge(RequestInterface $request, ResponseInterface $response)
+    {
         $auth = new HTTP\Auth\Basic(
             $this->realm,
             $request,
             $response
         );
         $auth->requireLogin();
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBearer.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBearer.php
index ae7a8a12f..a2653b2b0 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBearer.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractBearer.php
@@ -1,14 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
-use Sabre\DAV;
 use Sabre\HTTP;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * HTTP Bearer authentication backend class
+ * HTTP Bearer authentication backend class.
  *
  * This class can be used by authentication objects wishing to use HTTP Bearer
  * Most of the digest logic is handled, implementors just need to worry about
@@ -20,8 +21,8 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractBearer implements BackendInterface {
-
+abstract class AbstractBearer implements BackendInterface
+{
     /**
      * Authentication Realm.
      *
@@ -33,12 +34,13 @@ abstract class AbstractBearer implements BackendInterface {
     protected $realm = 'sabre/dav';
 
     /**
-     * Validates a Bearer token
+     * Validates a Bearer token.
      *
      * This method should return the full principal url, or false if the
      * token was incorrect.
      *
      * @param string $bearerToken
+     *
      * @return string|false
      */
     abstract protected function validateBearerToken($bearerToken);
@@ -47,12 +49,10 @@ abstract class AbstractBearer implements BackendInterface {
      * Sets the authentication realm for this backend.
      *
      * @param string $realm
-     * @return void
      */
-    function setRealm($realm) {
-
+    public function setRealm($realm)
+    {
         $this->realm = $realm;
-
     }
 
     /**
@@ -79,12 +79,13 @@ abstract class AbstractBearer implements BackendInterface {
      *
      * principals/users/[username]
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function check(RequestInterface $request, ResponseInterface $response) {
-
+    public function check(RequestInterface $request, ResponseInterface $response)
+    {
         $auth = new HTTP\Auth\Bearer(
             $this->realm,
             $request,
@@ -97,10 +98,10 @@ abstract class AbstractBearer implements BackendInterface {
         }
         $principalUrl = $this->validateBearerToken($bearerToken);
         if (!$principalUrl) {
-            return [false, "Bearer token was incorrect"];
+            return [false, 'Bearer token was incorrect'];
         }
-        return [true, $principalUrl];
 
+        return [true, $principalUrl];
     }
 
     /**
@@ -120,19 +121,16 @@ abstract class AbstractBearer implements BackendInterface {
      * append your own WWW-Authenticate header instead of overwriting the
      * existing one.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function challenge(RequestInterface $request, ResponseInterface $response) {
-
+    public function challenge(RequestInterface $request, ResponseInterface $response)
+    {
         $auth = new HTTP\Auth\Bearer(
             $this->realm,
             $request,
             $response
         );
         $auth->requireLogin();
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php
index 4b47f56c9..06c9ed3a4 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\DAV;
@@ -8,7 +10,7 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * HTTP Digest authentication backend class
+ * HTTP Digest authentication backend class.
  *
  * This class can be used by authentication objects wishing to use HTTP Digest
  * Most of the digest logic is handled, implementors just need to worry about
@@ -18,8 +20,8 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractDigest implements BackendInterface {
-
+abstract class AbstractDigest implements BackendInterface
+{
     /**
      * Authentication Realm.
      *
@@ -45,12 +47,10 @@ abstract class AbstractDigest implements BackendInterface {
      * existing hashes will break and nobody can authenticate.
      *
      * @param string $realm
-     * @return void
      */
-    function setRealm($realm) {
-
+    public function setRealm($realm)
+    {
         $this->realm = $realm;
-
     }
 
     /**
@@ -60,9 +60,10 @@ abstract class AbstractDigest implements BackendInterface {
      *
      * @param string $realm
      * @param string $username
+     *
      * @return string|null
      */
-    abstract function getDigestHash($realm, $username);
+    abstract public function getDigestHash($realm, $username);
 
     /**
      * When this method is called, the backend must check if authentication was
@@ -88,12 +89,13 @@ abstract class AbstractDigest implements BackendInterface {
      *
      * principals/users/[username]
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function check(RequestInterface $request, ResponseInterface $response) {
-
+    public function check(RequestInterface $request, ResponseInterface $response)
+    {
         $digest = new HTTP\Auth\Digest(
             $this->realm,
             $request,
@@ -110,8 +112,8 @@ abstract class AbstractDigest implements BackendInterface {
 
         $hash = $this->getDigestHash($this->realm, $username);
         // If this was false, the user account didn't exist
-        if ($hash === false || is_null($hash)) {
-            return [false, "Username or password was incorrect"];
+        if (false === $hash || is_null($hash)) {
+            return [false, 'Username or password was incorrect'];
         }
         if (!is_string($hash)) {
             throw new DAV\Exception('The returned value from getDigestHash must be a string or null');
@@ -119,11 +121,10 @@ abstract class AbstractDigest implements BackendInterface {
 
         // If this was false, the password or part of the hash was incorrect.
         if (!$digest->validateA1($hash)) {
-            return [false, "Username or password was incorrect"];
+            return [false, 'Username or password was incorrect'];
         }
 
-        return [true, $this->principalPrefix . $username];
-
+        return [true, $this->principalPrefix.$username];
     }
 
     /**
@@ -143,12 +144,11 @@ abstract class AbstractDigest implements BackendInterface {
      * append your own WWW-Authenticate header instead of overwriting the
      * existing one.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function challenge(RequestInterface $request, ResponseInterface $response) {
-
+    public function challenge(RequestInterface $request, ResponseInterface $response)
+    {
         $auth = new HTTP\Auth\Digest(
             $this->realm,
             $request,
@@ -162,7 +162,5 @@ abstract class AbstractDigest implements BackendInterface {
         // Preventing the digest utility from modifying the http status code,
         // this should be handled by the main plugin.
         $response->setStatus($oldStatus);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/Apache.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/Apache.php
index e203d2685..201fe615c 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/Apache.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/Apache.php
@@ -1,24 +1,26 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * Apache authenticator
+ * Apache (or NGINX) authenticator.
  *
  * This authentication backend assumes that authentication has been
- * configured in apache, rather than within SabreDAV.
+ * configured in apache (or NGINX), rather than within SabreDAV.
  *
- * Make sure apache is properly configured for this to work.
+ * Make sure apache (or NGINX) is properly configured for this to work.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Apache implements BackendInterface {
-
+class Apache implements BackendInterface
+{
     /**
      * This is the prefix that will be used to generate principal urls.
      *
@@ -50,22 +52,25 @@ class Apache implements BackendInterface {
      *
      * principals/users/[username]
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function check(RequestInterface $request, ResponseInterface $response) {
-
+    public function check(RequestInterface $request, ResponseInterface $response)
+    {
         $remoteUser = $request->getRawServerValue('REMOTE_USER');
         if (is_null($remoteUser)) {
             $remoteUser = $request->getRawServerValue('REDIRECT_REMOTE_USER');
         }
         if (is_null($remoteUser)) {
-            return [false, 'No REMOTE_USER property was found in the PHP $_SERVER super-global. This likely means your server is not configured correctly'];
+            $remoteUser = $request->getRawServerValue('PHP_AUTH_USER');
+        }
+        if (is_null($remoteUser)) {
+            return [false, 'No REMOTE_USER, REDIRECT_REMOTE_USER, or PHP_AUTH_USER property was found in the PHP $_SERVER super-global. This likely means your server is not configured correctly'];
         }
 
-        return [true, $this->principalPrefix . $remoteUser];
-
+        return [true, $this->principalPrefix.$remoteUser];
     }
 
     /**
@@ -85,12 +90,10 @@ class Apache implements BackendInterface {
      * append your own WWW-Authenticate header instead of overwriting the
      * existing one.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function challenge(RequestInterface $request, ResponseInterface $response) {
-
+    public function challenge(RequestInterface $request, ResponseInterface $response)
+    {
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/BackendInterface.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/BackendInterface.php
index 0fb2210f4..8598791fb 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/BackendInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\HTTP\RequestInterface;
@@ -12,8 +14,8 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface BackendInterface {
-
+interface BackendInterface
+{
     /**
      * When this method is called, the backend must check if authentication was
      * successful.
@@ -38,11 +40,12 @@ interface BackendInterface {
      *
      * principals/users/[username]
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function check(RequestInterface $request, ResponseInterface $response);
+    public function check(RequestInterface $request, ResponseInterface $response);
 
     /**
      * This method is called when a user could not be authenticated, and
@@ -61,10 +64,8 @@ interface BackendInterface {
      * append your own WWW-Authenticate header instead of overwriting the
      * existing one.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function challenge(RequestInterface $request, ResponseInterface $response);
-
+    public function challenge(RequestInterface $request, ResponseInterface $response);
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/BasicCallBack.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/BasicCallBack.php
index 7ad8f48b2..aab3c5e1c 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/BasicCallBack.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/BasicCallBack.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 /**
@@ -14,10 +16,10 @@ namespace Sabre\DAV\Auth\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class BasicCallBack extends AbstractBasic {
-
+class BasicCallBack extends AbstractBasic
+{
     /**
-     * Callback
+     * Callback.
      *
      * @var callable
      */
@@ -30,29 +32,27 @@ class BasicCallBack extends AbstractBasic {
      * password.
      *
      * @param callable $callBack
-     * @return void
      */
-    function __construct(callable $callBack) {
-
+    public function __construct(callable $callBack)
+    {
         $this->callBack = $callBack;
-
     }
 
     /**
-     * Validates a username and password
+     * Validates a username and password.
      *
      * This method should return true or false depending on if login
      * succeeded.
      *
      * @param string $username
      * @param string $password
+     *
      * @return bool
      */
-    protected function validateUserPass($username, $password) {
-
+    protected function validateUserPass($username, $password)
+    {
         $cb = $this->callBack;
-        return $cb($username, $password);
 
+        return $cb($username, $password);
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php
index 3a687d747..ea2d39679 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\DAV;
@@ -13,10 +15,10 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class File extends AbstractDigest {
-
+class File extends AbstractDigest
+{
     /**
-     * List of users
+     * List of users.
      *
      * @var array
      */
@@ -29,11 +31,11 @@ class File extends AbstractDigest {
      *
      * @param string|null $filename
      */
-    function __construct($filename = null) {
-
-        if (!is_null($filename))
+    public function __construct($filename = null)
+    {
+        if (!is_null($filename)) {
             $this->loadFile($filename);
-
+        }
     }
 
     /**
@@ -41,37 +43,32 @@ class File extends AbstractDigest {
      * more than 1 file is used.
      *
      * @param string $filename
-     * @return void
      */
-    function loadFile($filename) {
-
+    public function loadFile($filename)
+    {
         foreach (file($filename, FILE_IGNORE_NEW_LINES) as $line) {
-
-            if (substr_count($line, ":") !== 2)
+            if (2 !== substr_count($line, ':')) {
                 throw new DAV\Exception('Malformed htdigest file. Every line should contain 2 colons');
-
+            }
             list($username, $realm, $A1) = explode(':', $line);
 
-            if (!preg_match('/^[a-zA-Z0-9]{32}$/', $A1))
+            if (!preg_match('/^[a-zA-Z0-9]{32}$/', $A1)) {
                 throw new DAV\Exception('Malformed htdigest file. Invalid md5 hash');
-
-            $this->users[$realm . ':' . $username] = $A1;
-
+            }
+            $this->users[$realm.':'.$username] = $A1;
         }
-
     }
 
     /**
-     * Returns a users' information
+     * Returns a users' information.
      *
      * @param string $realm
      * @param string $username
+     *
      * @return string
      */
-    function getDigestHash($realm, $username) {
-
-        return isset($this->users[$realm . ':' . $username]) ? $this->users[$realm . ':' . $username] : false;
-
+    public function getDigestHash($realm, $username)
+    {
+        return isset($this->users[$realm.':'.$username]) ? $this->users[$realm.':'.$username] : false;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/IMAP.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/IMAP.php
new file mode 100644
index 000000000..3a1831116
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/IMAP.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace Sabre\DAV\Auth\Backend;
+
+/**
+ * This is an authentication backend that uses imap.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Michael Niewöhner (foss@mniewoehner.de)
+ * @author rosali (https://github.com/rosali)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class IMAP extends AbstractBasic
+{
+    /**
+     * IMAP server in the form {host[:port][/flag1/flag2...]}.
+     *
+     * @see http://php.net/manual/en/function.imap-open.php
+     *
+     * @var string
+     */
+    protected $mailbox;
+
+    /**
+     * Creates the backend object.
+     *
+     * @param string $mailbox
+     */
+    public function __construct($mailbox)
+    {
+        $this->mailbox = $mailbox;
+    }
+
+    /**
+     * Connects to an IMAP server and tries to authenticate.
+     *
+     * @param string $username
+     * @param string $password
+     *
+     * @return bool
+     */
+    protected function imapOpen($username, $password)
+    {
+        $success = false;
+
+        try {
+            $imap = imap_open($this->mailbox, $username, $password, OP_HALFOPEN | OP_READONLY, 1);
+            if ($imap) {
+                $success = true;
+            }
+        } catch (\ErrorException $e) {
+            error_log($e->getMessage());
+        }
+
+        $errors = imap_errors();
+        if ($errors) {
+            foreach ($errors as $error) {
+                error_log($error);
+            }
+        }
+
+        if (isset($imap) && $imap) {
+            imap_close($imap);
+        }
+
+        return $success;
+    }
+
+    /**
+     * Validates a username and password by trying to authenticate against IMAP.
+     *
+     * @param string $username
+     * @param string $password
+     *
+     * @return bool
+     */
+    protected function validateUserPass($username, $password)
+    {
+        return $this->imapOpen($username, $password);
+    }
+}
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/PDO.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/PDO.php
index c2f6de974..87ead6fcd 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/PDO.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 /**
@@ -9,23 +11,22 @@ namespace Sabre\DAV\Auth\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PDO extends AbstractDigest {
-
+class PDO extends AbstractDigest
+{
     /**
-     * Reference to PDO connection
+     * Reference to PDO connection.
      *
      * @var PDO
      */
     protected $pdo;
 
     /**
-     * PDO table name we'll be using
+     * PDO table name we'll be using.
      *
      * @var string
      */
     public $tableName = 'users';
 
-
     /**
      * Creates the backend object.
      *
@@ -33,10 +34,9 @@ class PDO extends AbstractDigest {
      *
      * @param \PDO $pdo
      */
-    function __construct(\PDO $pdo) {
-
+    public function __construct(\PDO $pdo)
+    {
         $this->pdo = $pdo;
-
     }
 
     /**
@@ -44,14 +44,14 @@ class PDO extends AbstractDigest {
      *
      * @param string $realm
      * @param string $username
+     *
      * @return string|null
      */
-    function getDigestHash($realm, $username) {
-
-        $stmt = $this->pdo->prepare('SELECT digesta1 FROM ' . $this->tableName . ' WHERE username = ?');
+    public function getDigestHash($realm, $username)
+    {
+        $stmt = $this->pdo->prepare('SELECT digesta1 FROM '.$this->tableName.' WHERE username = ?');
         $stmt->execute([$username]);
-        return $stmt->fetchColumn() ?: null;
 
+        return $stmt->fetchColumn() ?: null;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Plugin.php b/vendor/sabre/dav/lib/DAV/Auth/Plugin.php
index bbb5d180d..9be90283f 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth;
 
 use Sabre\DAV\Exception\NotAuthenticated;
@@ -22,8 +24,8 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends ServerPlugin {
-
+class Plugin extends ServerPlugin
+{
     /**
      * By default this plugin will require that the user is authenticated,
      * and refuse any access if the user is not authenticated.
@@ -39,7 +41,7 @@ class Plugin extends ServerPlugin {
     public $autoRequireLogin = true;
 
     /**
-     * authentication backends
+     * authentication backends.
      */
     protected $backends;
 
@@ -52,40 +54,35 @@ class Plugin extends ServerPlugin {
     protected $currentPrincipal;
 
     /**
-     * Creates the authentication plugin
+     * Creates the authentication plugin.
      *
      * @param Backend\BackendInterface $authBackend
      */
-    function __construct(Backend\BackendInterface $authBackend = null) {
-
+    public function __construct(Backend\BackendInterface $authBackend = null)
+    {
         if (!is_null($authBackend)) {
             $this->addBackend($authBackend);
         }
-
     }
 
     /**
      * Adds an authentication backend to the plugin.
      *
      * @param Backend\BackendInterface $authBackend
-     * @return void
      */
-    function addBackend(Backend\BackendInterface $authBackend) {
-
+    public function addBackend(Backend\BackendInterface $authBackend)
+    {
         $this->backends[] = $authBackend;
-
     }
 
     /**
-     * Initializes the plugin. This function is automatically called by the server
+     * Initializes the plugin. This function is automatically called by the server.
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
-        $server->on('beforeMethod', [$this, 'beforeMethod'], 10);
-
+    public function initialize(Server $server)
+    {
+        $server->on('beforeMethod:*', [$this, 'beforeMethod'], 10);
     }
 
     /**
@@ -96,10 +93,9 @@ class Plugin extends ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'auth';
-
     }
 
     /**
@@ -114,23 +110,22 @@ class Plugin extends ServerPlugin {
      *
      * @return string|null
      */
-    function getCurrentPrincipal() {
-
+    public function getCurrentPrincipal()
+    {
         return $this->currentPrincipal;
-
     }
 
     /**
-     * This method is called before any HTTP method and forces users to be authenticated
+     * This method is called before any HTTP method and forces users to be authenticated.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function beforeMethod(RequestInterface $request, ResponseInterface $response) {
-
+    public function beforeMethod(RequestInterface $request, ResponseInterface $response)
+    {
         if ($this->currentPrincipal) {
-
             // We already have authentication information. This means that the
             // event has already fired earlier, and is now likely fired for a
             // sub-request.
@@ -144,7 +139,6 @@ class Plugin extends ServerPlugin {
             //
             // See issue #580 for more information about that.
             return;
-
         }
 
         $authResult = $this->check($request, $response);
@@ -153,11 +147,10 @@ class Plugin extends ServerPlugin {
             // Auth was successful
             $this->currentPrincipal = $authResult[1];
             $this->loginFailedReasons = null;
+
             return;
         }
 
-
-
         // If we got here, it means that no authentication backend was
         // successful in authenticating the user.
         $this->currentPrincipal = null;
@@ -167,7 +160,6 @@ class Plugin extends ServerPlugin {
             $this->challenge($request, $response);
             throw new NotAuthenticated(implode(', ', $authResult[1]));
         }
-
     }
 
     /**
@@ -184,24 +176,24 @@ class Plugin extends ServerPlugin {
      * unsuccessful. For every auth backend there will be one reason, so usually
      * there's just one.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function check(RequestInterface $request, ResponseInterface $response) {
-
+    public function check(RequestInterface $request, ResponseInterface $response)
+    {
         if (!$this->backends) {
             throw new \Sabre\DAV\Exception('No authentication backends were configured on this server.');
         }
         $reasons = [];
         foreach ($this->backends as $backend) {
-
             $result = $backend->check(
                 $request,
                 $response
             );
 
-            if (!is_array($result) || count($result) !== 2 || !is_bool($result[0]) || !is_string($result[1])) {
+            if (!is_array($result) || 2 !== count($result) || !is_bool($result[0]) || !is_string($result[1])) {
                 throw new \Sabre\DAV\Exception('The authentication backend did not return a correct value from the check() method.');
             }
 
@@ -211,11 +203,9 @@ class Plugin extends ServerPlugin {
                 return [true, $result[1]];
             }
             $reasons[] = $result[1];
-
         }
 
         return [false, $reasons];
-
     }
 
     /**
@@ -225,16 +215,16 @@ class Plugin extends ServerPlugin {
      * WWW-Authorization header, indicating to the client that it should
      * authenticate.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function challenge(RequestInterface $request, ResponseInterface $response) {
-
+    public function challenge(RequestInterface $request, ResponseInterface $response)
+    {
         foreach ($this->backends as $backend) {
             $backend->challenge($request, $response);
         }
-
     }
 
     /**
@@ -255,10 +245,9 @@ class Plugin extends ServerPlugin {
      *
      * @return string[]|null
      */
-    function getLoginFailedReasons() {
-
+    public function getLoginFailedReasons()
+    {
         return $this->loginFailedReasons;
-
     }
 
     /**
@@ -272,14 +261,12 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Generic authentication plugin',
-            'link'        => 'http://sabre.io/dav/authentication/',
+            'link' => 'http://sabre.io/dav/authentication/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Browser/GuessContentType.php b/vendor/sabre/dav/lib/DAV/Browser/GuessContentType.php
index 3ba2aee25..7466babb3 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/GuessContentType.php
+++ b/vendor/sabre/dav/lib/DAV/Browser/GuessContentType.php
@@ -1,14 +1,16 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\DAV;
-use Sabre\DAV\Inode;
+use Sabre\DAV\INode;
 use Sabre\DAV\PropFind;
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
- * GuessContentType plugin
+ * GuessContentType plugin.
  *
  * A lot of the built-in File objects just return application/octet-stream
  * as a content-type by default. This is a problem for some clients, because
@@ -22,17 +24,16 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class GuessContentType extends DAV\ServerPlugin {
-
+class GuessContentType extends DAV\ServerPlugin
+{
     /**
-     * List of recognized file extensions
+     * List of recognized file extensions.
      *
      * Feel free to add more
      *
      * @var array
      */
     public $extensionMap = [
-
         // images
         'jpg' => 'image/jpeg',
         'gif' => 'image/gif',
@@ -44,58 +45,52 @@ class GuessContentType extends DAV\ServerPlugin {
 
         // text
         'txt' => 'text/plain',
-
     ];
 
     /**
-     * Initializes the plugin
+     * Initializes the plugin.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         // Using a relatively low priority (200) to allow other extensions
         // to set the content-type first.
         $server->on('propFind', [$this, 'propFind'], 200);
-
     }
 
     /**
-     * Our PROPFIND handler
+     * Our PROPFIND handler.
      *
      * Here we set a contenttype, if the node didn't already have one.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFind(PropFind $propFind, INode $node) {
-
-        $propFind->handle('{DAV:}getcontenttype', function() use ($propFind) {
+    public function propFind(PropFind $propFind, INode $node)
+    {
+        $propFind->handle('{DAV:}getcontenttype', function () use ($propFind) {
+            list(, $fileName) = Uri\split($propFind->getPath());
 
-            list(, $fileName) = URLUtil::splitPath($propFind->getPath());
             return $this->getContentType($fileName);
-
         });
-
     }
 
     /**
-     * Simple method to return the contenttype
+     * Simple method to return the contenttype.
      *
      * @param string $fileName
+     *
      * @return string
      */
-    protected function getContentType($fileName) {
-
+    protected function getContentType($fileName)
+    {
         // Just grabbing the extension
         $extension = strtolower(substr($fileName, strrpos($fileName, '.') + 1));
         if (isset($this->extensionMap[$extension])) {
             return $this->extensionMap[$extension];
         }
-        return 'application/octet-stream';
 
+        return 'application/octet-stream';
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Browser/HtmlOutput.php b/vendor/sabre/dav/lib/DAV/Browser/HtmlOutput.php
index f4be6b348..59b3f5604 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/HtmlOutput.php
+++ b/vendor/sabre/dav/lib/DAV/Browser/HtmlOutput.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 /**
@@ -13,8 +15,8 @@ namespace Sabre\DAV\Browser;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface HtmlOutput {
-
+interface HtmlOutput
+{
     /**
      * Generate html representation for this value.
      *
@@ -27,8 +29,8 @@ interface HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html);
-
+    public function toHtml(HtmlOutputHelper $html);
 }
diff --git a/vendor/sabre/dav/lib/DAV/Browser/HtmlOutputHelper.php b/vendor/sabre/dav/lib/DAV/Browser/HtmlOutputHelper.php
index 249d54047..a7c747437 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/HtmlOutputHelper.php
+++ b/vendor/sabre/dav/lib/DAV/Browser/HtmlOutputHelper.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\Uri;
@@ -13,8 +15,8 @@ use Sabre\Xml\Service as XmlService;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class HtmlOutputHelper {
-
+class HtmlOutputHelper
+{
     /**
      * Link to the root of the application.
      *
@@ -40,13 +42,12 @@ class HtmlOutputHelper {
      * that can be used to make output a lot shorter.
      *
      * @param string $baseUri
-     * @param array $namespaceMap
+     * @param array  $namespaceMap
      */
-    function __construct($baseUri, array $namespaceMap) {
-
+    public function __construct($baseUri, array $namespaceMap)
+    {
         $this->baseUri = $baseUri;
         $this->namespaceMap = $namespaceMap;
-
     }
 
     /**
@@ -58,24 +59,24 @@ class HtmlOutputHelper {
      * Absolute urls are left alone.
      *
      * @param string $path
+     *
      * @return string
      */
-    function fullUrl($path) {
-
+    public function fullUrl($path)
+    {
         return Uri\resolve($this->baseUri, $path);
-
     }
 
     /**
      * Escape string for HTML output.
      *
-     * @param string $input
+     * @param scalar $input
+     *
      * @return string
      */
-    function h($input) {
-
-        return htmlspecialchars($input, ENT_COMPAT, 'UTF-8');
-
+    public function h($input)
+    {
+        return htmlspecialchars((string) $input, ENT_COMPAT, 'UTF-8');
     }
 
     /**
@@ -86,13 +87,14 @@ class HtmlOutputHelper {
      *
      * @param string $url
      * @param string $label
+     *
      * @return string
      */
-    function link($url, $label = null) {
-
+    public function link($url, $label = null)
+    {
         $url = $this->h($this->fullUrl($url));
-        return '<a href="' . $url . '">' . ($label ? $this->h($label) : $url) . '</a>';
 
+        return '<a href="'.$url.'">'.($label ? $this->h($label) : $url).'</a>';
     }
 
     /**
@@ -100,18 +102,18 @@ class HtmlOutputHelper {
      * shortened version with a prefix, if it was a known namespace.
      *
      * @param string $element
+     *
      * @return string
      */
-    function xmlName($element) {
-
+    public function xmlName($element)
+    {
         list($ns, $localName) = XmlService::parseClarkNotation($element);
         if (isset($this->namespaceMap[$ns])) {
-            $propName = $this->namespaceMap[$ns] . ':' . $localName;
+            $propName = $this->namespaceMap[$ns].':'.$localName;
         } else {
             $propName = $element;
         }
-        return "<span title=\"" . $this->h($element) . "\">" . $this->h($propName) . "</span>";
 
+        return '<span title="'.$this->h($element).'">'.$this->h($propName).'</span>';
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Browser/MapGetToPropFind.php b/vendor/sabre/dav/lib/DAV/Browser/MapGetToPropFind.php
index 61327c49a..25e061128 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/MapGetToPropFind.php
+++ b/vendor/sabre/dav/lib/DAV/Browser/MapGetToPropFind.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\DAV;
@@ -16,45 +18,46 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MapGetToPropFind extends DAV\ServerPlugin {
-
+class MapGetToPropFind extends DAV\ServerPlugin
+{
     /**
-     * reference to server class
+     * reference to server class.
      *
      * @var DAV\Server
      */
     protected $server;
 
     /**
-     * Initializes the plugin and subscribes to events
+     * Initializes the plugin and subscribes to events.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
         $this->server->on('method:GET', [$this, 'httpGet'], 90);
     }
 
     /**
-     * This method intercepts GET requests to non-files, and changes it into an HTTP PROPFIND request
+     * This method intercepts GET requests to non-files, and changes it into an HTTP PROPFIND request.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpGet(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGet(RequestInterface $request, ResponseInterface $response)
+    {
         $node = $this->server->tree->getNodeForPath($request->getPath());
-        if ($node instanceof DAV\IFile) return;
+        if ($node instanceof DAV\IFile) {
+            return;
+        }
 
         $subRequest = clone $request;
         $subRequest->setMethod('PROPFIND');
 
         $this->server->invokeMethod($subRequest, $response);
-        return false;
 
+        return false;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Browser/Plugin.php b/vendor/sabre/dav/lib/DAV/Browser/Plugin.php
index 545ad5633..e2fab4b79 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Browser/Plugin.php
@@ -1,15 +1,18 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\DAV;
 use Sabre\DAV\MkCol;
+use Sabre\HTTP;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
- * Browser Plugin
+ * Browser Plugin.
  *
  * This plugin provides a html representation, so that a WebDAV server may be accessed
  * using a browser.
@@ -21,10 +24,10 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     /**
-     * reference to server class
+     * reference to server class.
      *
      * @var DAV\Server
      */
@@ -60,53 +63,54 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @param bool $enablePost
      */
-    function __construct($enablePost = true) {
-
+    public function __construct($enablePost = true)
+    {
         $this->enablePost = $enablePost;
-
     }
 
     /**
-     * Initializes the plugin and subscribes to events
+     * Initializes the plugin and subscribes to events.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
         $this->server->on('method:GET', [$this, 'httpGetEarly'], 90);
         $this->server->on('method:GET', [$this, 'httpGet'], 200);
         $this->server->on('onHTMLActionsPanel', [$this, 'htmlActionsPanel'], 200);
-        if ($this->enablePost) $this->server->on('method:POST', [$this, 'httpPOST']);
+        if ($this->enablePost) {
+            $this->server->on('method:POST', [$this, 'httpPOST']);
+        }
     }
 
     /**
      * This method intercepts GET requests that have ?sabreAction=info
-     * appended to the URL
+     * appended to the URL.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpGetEarly(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGetEarly(RequestInterface $request, ResponseInterface $response)
+    {
         $params = $request->getQueryParameters();
-        if (isset($params['sabreAction']) && $params['sabreAction'] === 'info') {
+        if (isset($params['sabreAction']) && 'info' === $params['sabreAction']) {
             return $this->httpGet($request, $response);
         }
-
     }
 
     /**
-     * This method intercepts GET requests to collections and returns the html
+     * This method intercepts GET requests to collections and returns the html.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpGet(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGet(RequestInterface $request, ResponseInterface $response)
+    {
         // We're not using straight-up $_GET, because we want everything to be
         // unit testable.
         $getVars = $request->getQueryParameters();
@@ -117,13 +121,13 @@ class Plugin extends DAV\ServerPlugin {
         $sabreAction = isset($getVars['sabreAction']) ? $getVars['sabreAction'] : null;
 
         switch ($sabreAction) {
-
-            case 'asset' :
+            case 'asset':
                 // Asset handling, such as images
                 $this->serveAsset(isset($getVars['assetName']) ? $getVars['assetName'] : null);
+
                 return false;
-            default :
-            case 'info' :
+            default:
+            case 'info':
                 try {
                     $this->server->tree->getNodeForPath($request->getPath());
                 } catch (DAV\Exception\NotFound $e) {
@@ -141,7 +145,7 @@ class Plugin extends DAV\ServerPlugin {
 
                 return false;
 
-            case 'plugins' :
+            case 'plugins':
                 $response->setStatus(200);
                 $response->setHeader('Content-Type', 'text/html; charset=utf-8');
 
@@ -150,41 +154,39 @@ class Plugin extends DAV\ServerPlugin {
                 );
 
                 return false;
-
         }
-
     }
 
     /**
      * Handles POST requests for tree operations.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpPOST(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPOST(RequestInterface $request, ResponseInterface $response)
+    {
         $contentType = $request->getHeader('Content-Type');
         list($contentType) = explode(';', $contentType);
-        if ($contentType !== 'application/x-www-form-urlencoded' &&
-            $contentType !== 'multipart/form-data') {
-                return;
+        if ('application/x-www-form-urlencoded' !== $contentType &&
+            'multipart/form-data' !== $contentType) {
+            return;
         }
         $postVars = $request->getPostData();
 
-        if (!isset($postVars['sabreAction']))
+        if (!isset($postVars['sabreAction'])) {
             return;
+        }
 
         $uri = $request->getPath();
 
         if ($this->server->emit('onBrowserPostAction', [$uri, $postVars['sabreAction'], $postVars])) {
-
             switch ($postVars['sabreAction']) {
-
-                case 'mkcol' :
+                case 'mkcol':
                     if (isset($postVars['name']) && trim($postVars['name'])) {
                         // Using basename() because we won't allow slashes
-                        list(, $folderName) = URLUtil::splitPath(trim($postVars['name']));
+                        list(, $folderName) = Uri\split(trim($postVars['name']));
 
                         if (isset($postVars['resourceType'])) {
                             $resourceType = explode(',', $postVars['resourceType']);
@@ -196,7 +198,7 @@ class Plugin extends DAV\ServerPlugin {
                         foreach ($postVars as $varName => $varValue) {
                             // Any _POST variable in clark notation is treated
                             // like a property.
-                            if ($varName[0] === '{') {
+                            if ('{' === $varName[0]) {
                                 // PHP will convert any dots to underscores.
                                 // This leaves us with no way to differentiate
                                 // the two.
@@ -212,65 +214,67 @@ class Plugin extends DAV\ServerPlugin {
                             $resourceType,
                             $properties
                         );
-                        $this->server->createCollection($uri . '/' . $folderName, $mkCol);
+                        $this->server->createCollection($uri.'/'.$folderName, $mkCol);
                     }
                     break;
 
                 // @codeCoverageIgnoreStart
-                case 'put' :
+                case 'put':
 
-                    if ($_FILES) $file = current($_FILES);
-                    else break;
+                    if ($_FILES) {
+                        $file = current($_FILES);
+                    } else {
+                        break;
+                    }
 
-                    list(, $newName) = URLUtil::splitPath(trim($file['name']));
-                    if (isset($postVars['name']) && trim($postVars['name']))
+                    list(, $newName) = Uri\split(trim($file['name']));
+                    if (isset($postVars['name']) && trim($postVars['name'])) {
                         $newName = trim($postVars['name']);
+                    }
 
                     // Making sure we only have a 'basename' component
-                    list(, $newName) = URLUtil::splitPath($newName);
+                    list(, $newName) = Uri\split($newName);
 
                     if (is_uploaded_file($file['tmp_name'])) {
-                        $this->server->createFile($uri . '/' . $newName, fopen($file['tmp_name'], 'r'));
+                        $this->server->createFile($uri.'/'.$newName, fopen($file['tmp_name'], 'r'));
                     }
                     break;
                 // @codeCoverageIgnoreEnd
-
             }
-
         }
         $response->setHeader('Location', $request->getUrl());
         $response->setStatus(302);
-        return false;
 
+        return false;
     }
 
     /**
      * Escapes a string for html.
      *
      * @param string $value
+     *
      * @return string
      */
-    function escapeHTML($value) {
-
+    public function escapeHTML($value)
+    {
         return htmlspecialchars($value, ENT_QUOTES, 'UTF-8');
-
     }
 
     /**
-     * Generates the html directory index for a given url
+     * Generates the html directory index for a given url.
      *
      * @param string $path
+     *
      * @return string
      */
-    function generateDirectoryIndex($path) {
-
+    public function generateDirectoryIndex($path)
+    {
         $html = $this->generateHeader($path ? $path : '/', $path);
 
         $node = $this->server->tree->getNodeForPath($path);
         if ($node instanceof DAV\ICollection) {
-
             $html .= "<section><h1>Nodes</h1>\n";
-            $html .= "<table class=\"nodeTable\">";
+            $html .= '<table class="nodeTable">';
 
             $subNodes = $this->server->getPropertiesForChildren($path, [
                 '{DAV:}displayname',
@@ -281,10 +285,9 @@ class Plugin extends DAV\ServerPlugin {
             ]);
 
             foreach ($subNodes as $subPath => $subProps) {
-
                 $subNode = $this->server->tree->getNodeForPath($subPath);
-                $fullPath = $this->server->getBaseUri() . URLUtil::encodePath($subPath);
-                list(, $displayPath) = URLUtil::splitPath($subPath);
+                $fullPath = $this->server->getBaseUri().HTTP\encodePath($subPath);
+                list(, $displayPath) = Uri\split($subPath);
 
                 $subNodes[$subPath]['subNode'] = $subNode;
                 $subNodes[$subPath]['fullPath'] = $fullPath;
@@ -295,43 +298,46 @@ class Plugin extends DAV\ServerPlugin {
             foreach ($subNodes as $subProps) {
                 $type = [
                     'string' => 'Unknown',
-                    'icon'   => 'cog',
+                    'icon' => 'cog',
                 ];
                 if (isset($subProps['{DAV:}resourcetype'])) {
                     $type = $this->mapResourceType($subProps['{DAV:}resourcetype']->getValue(), $subProps['subNode']);
                 }
 
                 $html .= '<tr>';
-                $html .= '<td class="nameColumn"><a href="' . $this->escapeHTML($subProps['fullPath']) . '"><span class="oi" data-glyph="' . $this->escapeHTML($type['icon']) . '"></span> ' . $this->escapeHTML($subProps['displayPath']) . '</a></td>';
-                $html .= '<td class="typeColumn">' . $this->escapeHTML($type['string']) . '</td>';
+                $html .= '<td class="nameColumn"><a href="'.$this->escapeHTML($subProps['fullPath']).'"><span class="oi" data-glyph="'.$this->escapeHTML($type['icon']).'"></span> '.$this->escapeHTML($subProps['displayPath']).'</a></td>';
+                $html .= '<td class="typeColumn">'.$this->escapeHTML($type['string']).'</td>';
                 $html .= '<td>';
                 if (isset($subProps['{DAV:}getcontentlength'])) {
-                    $html .= $this->escapeHTML($subProps['{DAV:}getcontentlength'] . ' bytes');
+                    $html .= $this->escapeHTML($subProps['{DAV:}getcontentlength'].' bytes');
                 }
                 $html .= '</td><td>';
                 if (isset($subProps['{DAV:}getlastmodified'])) {
                     $lastMod = $subProps['{DAV:}getlastmodified']->getTime();
                     $html .= $this->escapeHTML($lastMod->format('F j, Y, g:i a'));
                 }
+                $html .= '</td><td>';
+                if (isset($subProps['{DAV:}displayname'])) {
+                    $html .= $this->escapeHTML($subProps['{DAV:}displayname']);
+                }
                 $html .= '</td>';
 
                 $buttonActions = '';
                 if ($subProps['subNode'] instanceof DAV\IFile) {
-                    $buttonActions = '<a href="' . $this->escapeHTML($subProps['fullPath']) . '?sabreAction=info"><span class="oi" data-glyph="info"></span></a>';
+                    $buttonActions = '<a href="'.$this->escapeHTML($subProps['fullPath']).'?sabreAction=info"><span class="oi" data-glyph="info"></span></a>';
                 }
                 $this->server->emit('browserButtonActions', [$subProps['fullPath'], $subProps['subNode'], &$buttonActions]);
 
-                $html .= '<td>' . $buttonActions . '</td>';
+                $html .= '<td>'.$buttonActions.'</td>';
                 $html .= '</tr>';
             }
 
             $html .= '</table>';
-
         }
 
-        $html .= "</section>";
-        $html .= "<section><h1>Properties</h1>";
-        $html .= "<table class=\"propTable\">";
+        $html .= '</section>';
+        $html .= '<section><h1>Properties</h1>';
+        $html .= '<table class="propTable">';
 
         // Allprops request
         $propFind = new PropFindAll($path);
@@ -343,12 +349,10 @@ class Plugin extends DAV\ServerPlugin {
             if (!in_array($propName, $this->uninterestingProperties)) {
                 $html .= $this->drawPropertyRow($propName, $propValue);
             }
-
         }
 
-
-        $html .= "</table>";
-        $html .= "</section>";
+        $html .= '</table>';
+        $html .= '</section>';
 
         /* Start of generating actions */
 
@@ -358,8 +362,7 @@ class Plugin extends DAV\ServerPlugin {
         }
 
         if ($output) {
-
-            $html .= "<section><h1>Actions</h1>";
+            $html .= '<section><h1>Actions</h1>';
             $html .= "<div class=\"actions\">\n";
             $html .= $output;
             $html .= "</div>\n";
@@ -371,7 +374,6 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setHeader('Content-Security-Policy', "default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';");
 
         return $html;
-
     }
 
     /**
@@ -379,31 +381,30 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function generatePluginListing() {
-
+    public function generatePluginListing()
+    {
         $html = $this->generateHeader('Plugins');
 
-        $html .= "<section><h1>Plugins</h1>";
-        $html .= "<table class=\"propTable\">";
+        $html .= '<section><h1>Plugins</h1>';
+        $html .= '<table class="propTable">';
         foreach ($this->server->getPlugins() as $plugin) {
             $info = $plugin->getPluginInfo();
-            $html .= '<tr><th>' . $info['name'] . '</th>';
-            $html .= '<td>' . $info['description'] . '</td>';
+            $html .= '<tr><th>'.$info['name'].'</th>';
+            $html .= '<td>'.$info['description'].'</td>';
             $html .= '<td>';
             if (isset($info['link']) && $info['link']) {
-                $html .= '<a href="' . $this->escapeHTML($info['link']) . '"><span class="oi" data-glyph="book"></span></a>';
+                $html .= '<a href="'.$this->escapeHTML($info['link']).'"><span class="oi" data-glyph="book"></span></a>';
             }
             $html .= '</td></tr>';
         }
-        $html .= "</table>";
-        $html .= "</section>";
+        $html .= '</table>';
+        $html .= '</section>';
 
         /* Start of generating actions */
 
         $html .= $this->generateFooter();
 
         return $html;
-
     }
 
     /**
@@ -414,22 +415,23 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @param string $title
      * @param string $path
+     *
      * @return string
      */
-    function generateHeader($title, $path = null) {
-
+    public function generateHeader($title, $path = null)
+    {
         $version = '';
         if (DAV\Server::$exposeVersion) {
             $version = DAV\Version::VERSION;
         }
 
         $vars = [
-            'title'     => $this->escapeHTML($title),
-            'favicon'   => $this->escapeHTML($this->getAssetUrl('favicon.ico')),
-            'style'     => $this->escapeHTML($this->getAssetUrl('sabredav.css')),
+            'title' => $this->escapeHTML($title),
+            'favicon' => $this->escapeHTML($this->getAssetUrl('favicon.ico')),
+            'style' => $this->escapeHTML($this->getAssetUrl('sabredav.css')),
             'iconstyle' => $this->escapeHTML($this->getAssetUrl('openiconic/open-iconic.css')),
-            'logo'      => $this->escapeHTML($this->getAssetUrl('sabredav.png')),
-            'baseUrl'   => $this->server->getBaseUri(),
+            'logo' => $this->escapeHTML($this->getAssetUrl('sabredav.png')),
+            'baseUrl' => $this->server->getBaseUri(),
         ];
 
         $html = <<<HTML
@@ -453,20 +455,19 @@ class Plugin extends DAV\ServerPlugin {
 HTML;
 
         // If the path is empty, there's no parent.
-        if ($path)  {
-            list($parentUri) = URLUtil::splitPath($path);
-            $fullPath = $this->server->getBaseUri() . URLUtil::encodePath($parentUri);
-            $html .= '<a href="' . $fullPath . '" class="btn">⇤ Go to parent</a>';
+        if ($path) {
+            list($parentUri) = Uri\split($path);
+            $fullPath = $this->server->getBaseUri().HTTP\encodePath($parentUri);
+            $html .= '<a href="'.$fullPath.'" class="btn">⇤ Go to parent</a>';
         } else {
             $html .= '<span class="btn disabled">⇤ Go to parent</span>';
         }
 
         $html .= ' <a href="?sabreAction=plugins" class="btn"><span class="oi" data-glyph="puzzle-piece"></span> Plugins</a>';
 
-        $html .= "</nav>";
+        $html .= '</nav>';
 
         return $html;
-
     }
 
     /**
@@ -476,18 +477,19 @@ HTML;
      *
      * @return string
      */
-    function generateFooter() {
-
+    public function generateFooter()
+    {
         $version = '';
         if (DAV\Server::$exposeVersion) {
             $version = DAV\Version::VERSION;
         }
+        $year = date('Y');
+
         return <<<HTML
-<footer>Generated by SabreDAV $version (c)2007-2016 <a href="http://sabre.io/">http://sabre.io/</a></footer>
+<footer>Generated by SabreDAV $version (c)2007-$year <a href="http://sabre.io/">http://sabre.io/</a></footer>
 </body>
 </html>
 HTML;
-
     }
 
     /**
@@ -498,19 +500,20 @@ HTML;
      * creating new directories.
      *
      * @param DAV\INode $node
-     * @param mixed $output
-     * @param string $path
-     * @return void
+     * @param mixed     $output
+     * @param string    $path
      */
-    function htmlActionsPanel(DAV\INode $node, &$output, $path) {
-
-        if (!$node instanceof DAV\ICollection)
+    public function htmlActionsPanel(DAV\INode $node, &$output, $path)
+    {
+        if (!$node instanceof DAV\ICollection) {
             return;
+        }
 
         // We also know fairly certain that if an object is a non-extended
         // SimpleCollection, we won't need to show the panel either.
-        if (get_class($node) === 'Sabre\\DAV\\SimpleCollection')
+        if ('Sabre\\DAV\\SimpleCollection' === get_class($node)) {
             return;
+        }
 
         $output .= <<<HTML
 <form method="post" action="">
@@ -527,7 +530,6 @@ HTML;
 <input type="submit" value="upload" />
 </form>
 HTML;
-
     }
 
     /**
@@ -535,32 +537,35 @@ HTML;
      * suiteable for http access.
      *
      * @param string $assetName
+     *
      * @return string
      */
-    protected function getAssetUrl($assetName) {
-
-        return $this->server->getBaseUri() . '?sabreAction=asset&assetName=' . urlencode($assetName);
-
+    protected function getAssetUrl($assetName)
+    {
+        return $this->server->getBaseUri().'?sabreAction=asset&assetName='.urlencode($assetName);
     }
 
     /**
      * This method returns a local pathname to an asset.
      *
      * @param string $assetName
+     *
      * @throws DAV\Exception\NotFound
+     *
      * @return string
      */
-    protected function getLocalAssetPath($assetName) {
-
-        $assetDir = __DIR__ . '/assets/';
-        $path = $assetDir . $assetName;
+    protected function getLocalAssetPath($assetName)
+    {
+        $assetDir = __DIR__.'/assets/';
+        $path = $assetDir.$assetName;
 
         // Making sure people aren't trying to escape from the base path.
         $path = str_replace('\\', '/', $path);
-        if (strpos($path, '/../') !== false || strrchr($path, '/') === '/..') {
+        if (false !== strpos($path, '/../') || '/..' === strrchr($path, '/')) {
             throw new DAV\Exception\NotFound('Path does not exist, or escaping from the base path was detected');
         }
-        if (strpos(realpath($path), realpath($assetDir)) === 0 && file_exists($path)) {
+        $realPath = realpath($path);
+        if ($realPath && 0 === strpos($realPath, realpath($assetDir)) && file_exists($path)) {
             return $path;
         }
         throw new DAV\Exception\NotFound('Path does not exist, or escaping from the base path was detected');
@@ -570,10 +575,9 @@ HTML;
      * This method reads an asset from disk and generates a full http response.
      *
      * @param string $assetName
-     * @return void
      */
-    protected function serveAsset($assetName) {
-
+    protected function serveAsset($assetName)
+    {
         $assetPath = $this->getLocalAssetPath($assetName);
 
         // Rudimentary mime type detection
@@ -594,7 +598,6 @@ HTML;
         $this->server->httpResponse->setHeader('Cache-Control', 'public, max-age=1209600');
         $this->server->httpResponse->setStatus(200);
         $this->server->httpResponse->setBody(fopen($assetPath, 'r'));
-
     }
 
     /**
@@ -603,10 +606,11 @@ HTML;
      *
      * @param array $a
      * @param array $b
+     *
      * @return int
      */
-    protected function compareNodes($a, $b) {
-
+    protected function compareNodes($a, $b)
+    {
         $typeA = (isset($a['{DAV:}resourcetype']))
             ? (in_array('{DAV:}collection', $a['{DAV:}resourcetype']->getValue()))
             : false;
@@ -619,29 +623,30 @@ HTML;
         if ($typeA === $typeB) {
             return strnatcasecmp($a['displayPath'], $b['displayPath']);
         }
-        return (($typeA < $typeB) ? 1 : -1);
 
+        return ($typeA < $typeB) ? 1 : -1;
     }
 
     /**
      * Maps a resource type to a human-readable string and icon.
      *
-     * @param array $resourceTypes
+     * @param array     $resourceTypes
      * @param DAV\INode $node
+     *
      * @return array
      */
-    private function mapResourceType(array $resourceTypes, $node) {
-
+    private function mapResourceType(array $resourceTypes, $node)
+    {
         if (!$resourceTypes) {
             if ($node instanceof DAV\IFile) {
                 return [
                     'string' => 'File',
-                    'icon'   => 'file',
+                    'icon' => 'file',
                 ];
             } else {
                 return [
                     'string' => 'Unknown',
-                    'icon'   => 'cog',
+                    'icon' => 'cog',
                 ];
             }
         }
@@ -649,53 +654,53 @@ HTML;
         $types = [
             '{http://calendarserver.org/ns/}calendar-proxy-write' => [
                 'string' => 'Proxy-Write',
-                'icon'   => 'people',
+                'icon' => 'people',
             ],
             '{http://calendarserver.org/ns/}calendar-proxy-read' => [
                 'string' => 'Proxy-Read',
-                'icon'   => 'people',
+                'icon' => 'people',
             ],
             '{urn:ietf:params:xml:ns:caldav}schedule-outbox' => [
                 'string' => 'Outbox',
-                'icon'   => 'inbox',
+                'icon' => 'inbox',
             ],
             '{urn:ietf:params:xml:ns:caldav}schedule-inbox' => [
                 'string' => 'Inbox',
-                'icon'   => 'inbox',
+                'icon' => 'inbox',
             ],
             '{urn:ietf:params:xml:ns:caldav}calendar' => [
                 'string' => 'Calendar',
-                'icon'   => 'calendar',
+                'icon' => 'calendar',
             ],
             '{http://calendarserver.org/ns/}shared-owner' => [
                 'string' => 'Shared',
-                'icon'   => 'calendar',
+                'icon' => 'calendar',
             ],
             '{http://calendarserver.org/ns/}subscribed' => [
                 'string' => 'Subscription',
-                'icon'   => 'calendar',
+                'icon' => 'calendar',
             ],
             '{urn:ietf:params:xml:ns:carddav}directory' => [
                 'string' => 'Directory',
-                'icon'   => 'globe',
+                'icon' => 'globe',
             ],
             '{urn:ietf:params:xml:ns:carddav}addressbook' => [
                 'string' => 'Address book',
-                'icon'   => 'book',
+                'icon' => 'book',
             ],
             '{DAV:}principal' => [
                 'string' => 'Principal',
-                'icon'   => 'person',
+                'icon' => 'person',
             ],
             '{DAV:}collection' => [
                 'string' => 'Collection',
-                'icon'   => 'folder',
+                'icon' => 'folder',
             ],
         ];
 
         $info = [
             'string' => [],
-            'icon'   => 'cog',
+            'icon' => 'cog',
         ];
         foreach ($resourceTypes as $k => $resourceType) {
             if (isset($types[$resourceType])) {
@@ -713,42 +718,41 @@ HTML;
         $info['string'] = implode(', ', $info['string']);
 
         return $info;
-
     }
 
     /**
-     * Draws a table row for a property
+     * Draws a table row for a property.
      *
      * @param string $name
-     * @param mixed $value
+     * @param mixed  $value
+     *
      * @return string
      */
-    private function drawPropertyRow($name, $value) {
-
+    private function drawPropertyRow($name, $value)
+    {
         $html = new HtmlOutputHelper(
             $this->server->getBaseUri(),
             $this->server->xml->namespaceMap
         );
 
-        return "<tr><th>" . $html->xmlName($name) . "</th><td>" . $this->drawPropertyValue($html, $value) . "</td></tr>";
-
+        return '<tr><th>'.$html->xmlName($name).'</th><td>'.$this->drawPropertyValue($html, $value).'</td></tr>';
     }
 
     /**
-     * Draws a table row for a property
+     * Draws a table row for a property.
      *
      * @param HtmlOutputHelper $html
-     * @param mixed $value
+     * @param mixed            $value
+     *
      * @return string
      */
-    private function drawPropertyValue($html, $value) {
-
+    private function drawPropertyValue($html, $value)
+    {
         if (is_scalar($value)) {
             return $html->h($value);
         } elseif ($value instanceof HtmlOutput) {
             return $value->toHtml($html);
         } elseif ($value instanceof \Sabre\Xml\XmlSerializable) {
-
             // There's no default html output for this property, we're going
             // to output the actual xml serialization instead.
             $xml = $this->server->xml->write('{DAV:}root', $value, $this->server->getBaseUri());
@@ -756,12 +760,11 @@ HTML;
             // element.
             $xml = explode("\n", $xml);
             $xml = array_slice($xml, 2, -2);
-            return "<pre>" . $html->h(implode("\n", $xml)) . "</pre>";
 
+            return '<pre>'.$html->h(implode("\n", $xml)).'</pre>';
         } else {
-            return "<em>unknown</em>";
+            return '<em>unknown</em>';
         }
-
     }
 
     /**
@@ -772,10 +775,9 @@ HTML;
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'browser';
-
     }
 
     /**
@@ -789,14 +791,12 @@ HTML;
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Generates HTML indexes and debug information for your sabre/dav server',
-            'link'        => 'http://sabre.io/dav/browser-plugin/',
+            'link' => 'http://sabre.io/dav/browser-plugin/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Browser/PropFindAll.php b/vendor/sabre/dav/lib/DAV/Browser/PropFindAll.php
index c14b7f2f9..34702bdd8 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/PropFindAll.php
+++ b/vendor/sabre/dav/lib/DAV/Browser/PropFindAll.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\DAV\PropFind;
@@ -12,17 +14,16 @@ use Sabre\DAV\PropFind;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PropFindAll extends PropFind {
-
+class PropFindAll extends PropFind
+{
     /**
-     * Creates the PROPFIND object
+     * Creates the PROPFIND object.
      *
      * @param string $path
      */
-    function __construct($path) {
-
+    public function __construct($path)
+    {
         parent::__construct($path, []);
-
     }
 
     /**
@@ -44,11 +45,10 @@ class PropFindAll extends PropFind {
      * It's also possible to not pass a callback, but immediately pass a value
      *
      * @param string $propertyName
-     * @param mixed $valueOrCallBack
-     * @return void
+     * @param mixed  $valueOrCallBack
      */
-    function handle($propertyName, $valueOrCallBack) {
-
+    public function handle($propertyName, $valueOrCallBack)
+    {
         if (is_callable($valueOrCallBack)) {
             $value = $valueOrCallBack();
         } else {
@@ -57,39 +57,36 @@ class PropFindAll extends PropFind {
         if (!is_null($value)) {
             $this->result[$propertyName] = [200, $value];
         }
-
     }
 
     /**
-     * Sets the value of the property
+     * Sets the value of the property.
      *
      * If status is not supplied, the status will default to 200 for non-null
      * properties, and 404 for null properties.
      *
      * @param string $propertyName
-     * @param mixed $value
-     * @param int $status
-     * @return void
+     * @param mixed  $value
+     * @param int    $status
      */
-    function set($propertyName, $value, $status = null) {
-
+    public function set($propertyName, $value, $status = null)
+    {
         if (is_null($status)) {
             $status = is_null($value) ? 404 : 200;
         }
         $this->result[$propertyName] = [$status, $value];
-
     }
 
     /**
      * Returns the current value for a property.
      *
      * @param string $propertyName
+     *
      * @return mixed
      */
-    function get($propertyName) {
-
+    public function get($propertyName)
+    {
         return isset($this->result[$propertyName]) ? $this->result[$propertyName][1] : null;
-
     }
 
     /**
@@ -99,12 +96,12 @@ class PropFindAll extends PropFind {
      * null will be returned.
      *
      * @param string $propertyName
+     *
      * @return int|null
      */
-    function getStatus($propertyName) {
-
+    public function getStatus($propertyName)
+    {
         return isset($this->result[$propertyName]) ? $this->result[$propertyName][0] : 404;
-
     }
 
     /**
@@ -113,11 +110,11 @@ class PropFindAll extends PropFind {
      *
      * @return array
      */
-    function get404Properties() {
-
+    public function get404Properties()
+    {
         $result = [];
         foreach ($this->result as $propertyName => $stuff) {
-            if ($stuff[0] === 404) {
+            if (404 === $stuff[0]) {
                 $result[] = $propertyName;
             }
         }
@@ -125,8 +122,7 @@ class PropFindAll extends PropFind {
         if (!$result) {
             $result[] = '{http://sabredav.org/ns}idk';
         }
-        return $result;
 
+        return $result;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Client.php b/vendor/sabre/dav/lib/DAV/Client.php
index 175ad1bc4..cfa24cd29 100644
--- a/vendor/sabre/dav/lib/DAV/Client.php
+++ b/vendor/sabre/dav/lib/DAV/Client.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 use Sabre\Uri;
 
 /**
- * SabreDAV DAV client
+ * SabreDAV DAV client.
  *
  * This client wraps around Curl to provide a convenient API to a WebDAV
  * server.
@@ -17,8 +19,8 @@ use Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Client extends HTTP\Client {
-
+class Client extends HTTP\Client
+{
     /**
      * The xml service.
      *
@@ -29,18 +31,19 @@ class Client extends HTTP\Client {
     public $xml;
 
     /**
-     * The elementMap
+     * The elementMap.
      *
      * This property is linked via reference to $this->xml->elementMap.
      * It's deprecated as of version 3.0.0, and should no longer be used.
      *
      * @deprecated
+     *
      * @var array
      */
     public $propertyMap = [];
 
     /**
-     * Base URI
+     * Base URI.
      *
      * This URI will be used to resolve relative urls.
      *
@@ -49,17 +52,17 @@ class Client extends HTTP\Client {
     protected $baseUri;
 
     /**
-     * Basic authentication
+     * Basic authentication.
      */
     const AUTH_BASIC = 1;
 
     /**
-     * Digest authentication
+     * Digest authentication.
      */
     const AUTH_DIGEST = 2;
 
     /**
-     * NTLM authentication
+     * NTLM authentication.
      */
     const AUTH_NTLM = 4;
 
@@ -69,12 +72,12 @@ class Client extends HTTP\Client {
     const ENCODING_IDENTITY = 1;
 
     /**
-     * Deflate encoding
+     * Deflate encoding.
      */
     const ENCODING_DEFLATE = 2;
 
     /**
-     * Gzip encoding
+     * Gzip encoding.
      */
     const ENCODING_GZIP = 4;
 
@@ -84,14 +87,14 @@ class Client extends HTTP\Client {
     const ENCODING_ALL = 7;
 
     /**
-     * Content-encoding
+     * Content-encoding.
      *
      * @var int
      */
     protected $encoding = self::ENCODING_IDENTITY;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * Settings are provided through the 'settings' argument. The following
      * settings are supported:
@@ -112,8 +115,8 @@ class Client extends HTTP\Client {
      *
      * @param array $settings
      */
-    function __construct(array $settings) {
-
+    public function __construct(array $settings)
+    {
         if (!isset($settings['baseUri'])) {
             throw new \InvalidArgumentException('A baseUri must be provided');
         }
@@ -146,8 +149,7 @@ class Client extends HTTP\Client {
             }
 
             $this->addCurlSetting(CURLOPT_HTTPAUTH, $curlType);
-            $this->addCurlSetting(CURLOPT_USERPWD, $userName . ':' . $password);
-
+            $this->addCurlSetting(CURLOPT_USERPWD, $userName.':'.$password);
         }
 
         if (isset($settings['encoding'])) {
@@ -166,16 +168,15 @@ class Client extends HTTP\Client {
             $this->addCurlSetting(CURLOPT_ENCODING, implode(',', $encodings));
         }
 
-        $this->addCurlSetting(CURLOPT_USERAGENT, 'sabre-dav/' . Version::VERSION . ' (http://sabre.io/)');
+        $this->addCurlSetting(CURLOPT_USERAGENT, 'sabre-dav/'.Version::VERSION.' (http://sabre.io/)');
 
         $this->xml = new Xml\Service();
         // BC
-        $this->propertyMap = & $this->xml->elementMap;
-
+        $this->propertyMap = &$this->xml->elementMap;
     }
 
     /**
-     * Does a PROPFIND request
+     * Does a PROPFIND request.
      *
      * The list of requested properties must be specified as an array, in clark
      * notation.
@@ -191,28 +192,28 @@ class Client extends HTTP\Client {
      * made to the server to also return all child resources.
      *
      * @param string $url
-     * @param array $properties
-     * @param int $depth
+     * @param array  $properties
+     * @param int    $depth
+     *
      * @return array
      */
-    function propFind($url, array $properties, $depth = 0) {
-
+    public function propFind($url, array $properties, $depth = 0)
+    {
         $dom = new \DOMDocument('1.0', 'UTF-8');
         $dom->formatOutput = true;
         $root = $dom->createElementNS('DAV:', 'd:propfind');
         $prop = $dom->createElement('d:prop');
 
         foreach ($properties as $property) {
-
             list(
                 $namespace,
                 $elementName
             ) = \Sabre\Xml\Service::parseClarkNotation($property);
 
-            if ($namespace === 'DAV:') {
-                $element = $dom->createElement('d:' . $elementName);
+            if ('DAV:' === $namespace) {
+                $element = $dom->createElement('d:'.$elementName);
             } else {
-                $element = $dom->createElementNS($namespace, 'x:' . $elementName);
+                $element = $dom->createElementNS($namespace, 'x:'.$elementName);
             }
 
             $prop->appendChild($element);
@@ -224,49 +225,48 @@ class Client extends HTTP\Client {
         $url = $this->getAbsoluteUrl($url);
 
         $request = new HTTP\Request('PROPFIND', $url, [
-            'Depth'        => $depth,
-            'Content-Type' => 'application/xml'
+            'Depth' => $depth,
+            'Content-Type' => 'application/xml',
         ], $body);
 
         $response = $this->send($request);
 
-        if ((int)$response->getStatus() >= 400) {
+        if ((int) $response->getStatus() >= 400) {
             throw new HTTP\ClientHttpException($response);
         }
 
         $result = $this->parseMultiStatus($response->getBodyAsString());
 
         // If depth was 0, we only return the top item
-        if ($depth === 0) {
+        if (0 === $depth) {
             reset($result);
             $result = current($result);
+
             return isset($result[200]) ? $result[200] : [];
         }
 
         $newResult = [];
         foreach ($result as $href => $statusList) {
-
             $newResult[$href] = isset($statusList[200]) ? $statusList[200] : [];
-
         }
 
         return $newResult;
-
     }
 
     /**
-     * Updates a list of properties on the server
+     * Updates a list of properties on the server.
      *
      * The list of properties must have clark-notation properties for the keys,
      * and the actual (string) value for the value. If the value is null, an
      * attempt is made to delete the property.
      *
      * @param string $url
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return bool
      */
-    function propPatch($url, array $properties) {
-
+    public function propPatch($url, array $properties)
+    {
         $propPatch = new Xml\Request\PropPatch();
         $propPatch->properties = $properties;
         $xml = $this->xml->write(
@@ -284,7 +284,7 @@ class Client extends HTTP\Client {
             throw new HTTP\ClientHttpException($response);
         }
 
-        if ($response->getStatus() === 207) {
+        if (207 === $response->getStatus()) {
             // If it's a 207, the request could still have failed, but the
             // information is hidden in the response body.
             $result = $this->parseMultiStatus($response->getBodyAsString());
@@ -292,26 +292,23 @@ class Client extends HTTP\Client {
             $errorProperties = [];
             foreach ($result as $href => $statusList) {
                 foreach ($statusList as $status => $properties) {
-
                     if ($status >= 400) {
                         foreach ($properties as $propName => $propValue) {
-                            $errorProperties[] = $propName . ' (' . $status . ')';
+                            $errorProperties[] = $propName.' ('.$status.')';
                         }
                     }
-
                 }
             }
             if ($errorProperties) {
-
-                throw new HTTP\ClientException('PROPPATCH failed. The following properties errored: ' . implode(', ', $errorProperties));
+                throw new HTTP\ClientException('PROPPATCH failed. The following properties errored: '.implode(', ', $errorProperties));
             }
         }
-        return true;
 
+        return true;
     }
 
     /**
-     * Performs an HTTP options request
+     * Performs an HTTP options request.
      *
      * This method returns all the features from the 'DAV:' header as an array.
      * If there was no DAV header, or no contents this method will return an
@@ -319,8 +316,8 @@ class Client extends HTTP\Client {
      *
      * @return array
      */
-    function options() {
-
+    public function options()
+    {
         $request = new HTTP\Request('OPTIONS', $this->getAbsoluteUrl(''));
         $response = $this->send($request);
 
@@ -333,8 +330,8 @@ class Client extends HTTP\Client {
         foreach ($features as &$v) {
             $v = trim($v);
         }
-        return $features;
 
+        return $features;
     }
 
     /**
@@ -359,24 +356,26 @@ class Client extends HTTP\Client {
      * Note that it is no longer recommended to use this method, use the send()
      * method instead.
      *
-     * @param string $method
-     * @param string $url
+     * @param string               $method
+     * @param string               $url
      * @param string|resource|null $body
-     * @param array $headers
-     * @throws ClientException, in case a curl error occurred.
+     * @param array                $headers
+     *
+     * @throws clientException, in case a curl error occurred
+     *
      * @return array
      */
-    function request($method, $url = '', $body = null, array $headers = []) {
-
+    public function request($method, $url = '', $body = null, array $headers = [])
+    {
         $url = $this->getAbsoluteUrl($url);
 
         $response = $this->send(new HTTP\Request($method, $url, $headers, $body));
+
         return [
-            'body'       => $response->getBodyAsString(),
-            'statusCode' => (int)$response->getStatus(),
-            'headers'    => array_change_key_case($response->getHeaders()),
+            'body' => $response->getBodyAsString(),
+            'statusCode' => (int) $response->getStatus(),
+            'headers' => array_change_key_case($response->getHeaders()),
         ];
-
     }
 
     /**
@@ -384,19 +383,19 @@ class Client extends HTTP\Client {
      * urls are expanded based on the base url as given by the server.
      *
      * @param string $url
+     *
      * @return string
      */
-    function getAbsoluteUrl($url) {
-
+    public function getAbsoluteUrl($url)
+    {
         return Uri\resolve(
             $this->baseUri,
             $url
         );
-
     }
 
     /**
-     * Parses a WebDAV multistatus response body
+     * Parses a WebDAV multistatus response body.
      *
      * This method returns an array with the following structure
      *
@@ -418,22 +417,19 @@ class Client extends HTTP\Client {
      *
      *
      * @param string $body xml body
+     *
      * @return array
      */
-    function parseMultiStatus($body) {
-
+    public function parseMultiStatus($body)
+    {
         $multistatus = $this->xml->expect('{DAV:}multistatus', $body);
 
         $result = [];
 
         foreach ($multistatus->getResponses() as $response) {
-
             $result[$response->getHref()] = $response->getResponseProperties();
-
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Collection.php b/vendor/sabre/dav/lib/DAV/Collection.php
index 35c90b5af..2728bb27e 100644
--- a/vendor/sabre/dav/lib/DAV/Collection.php
+++ b/vendor/sabre/dav/lib/DAV/Collection.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * Collection class
+ * Collection class.
  *
  * This is a helper class, that should aid in getting collections classes setup.
  * Most of its methods are implemented, and throw permission denied exceptions
@@ -12,8 +14,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Collection extends Node implements ICollection {
-
+abstract class Collection extends Node implements ICollection
+{
     /**
      * Returns a child object, by its name.
      *
@@ -25,18 +27,19 @@ abstract class Collection extends Node implements ICollection {
      * exist.
      *
      * @param string $name
+     *
      * @throws Exception\NotFound
+     *
      * @return INode
      */
-    function getChild($name) {
-
+    public function getChild($name)
+    {
         foreach ($this->getChildren() as $child) {
-
-            if ($child->getName() === $name) return $child;
-
+            if ($child->getName() === $name) {
+                return $child;
+            }
         }
-        throw new Exception\NotFound('File not found: ' . $name);
-
+        throw new Exception\NotFound('File not found: '.$name);
     }
 
     /**
@@ -45,25 +48,22 @@ abstract class Collection extends Node implements ICollection {
      * It is generally a good idea to try and override this. Usually it can be optimized.
      *
      * @param string $name
+     *
      * @return bool
      */
-    function childExists($name) {
-
+    public function childExists($name)
+    {
         try {
-
             $this->getChild($name);
-            return true;
 
+            return true;
         } catch (Exception\NotFound $e) {
-
             return false;
-
         }
-
     }
 
     /**
-     * Creates a new file in the directory
+     * Creates a new file in the directory.
      *
      * Data will either be supplied as a stream resource, or in certain cases
      * as a string. Keep in mind that you may have to support either.
@@ -82,28 +82,25 @@ abstract class Collection extends Node implements ICollection {
      * return the same contents of what was submitted here, you are strongly
      * recommended to omit the ETag.
      *
-     * @param string $name Name of the file
+     * @param string          $name Name of the file
      * @param resource|string $data Initial payload
-     * @return null|string
+     *
+     * @return string|null
      */
-    function createFile($name, $data = null) {
-
-        throw new Exception\Forbidden('Permission denied to create file (filename ' . $name . ')');
-
+    public function createFile($name, $data = null)
+    {
+        throw new Exception\Forbidden('Permission denied to create file (filename '.$name.')');
     }
 
     /**
-     * Creates a new subdirectory
+     * Creates a new subdirectory.
      *
      * @param string $name
+     *
      * @throws Exception\Forbidden
-     * @return void
      */
-    function createDirectory($name) {
-
+    public function createDirectory($name)
+    {
         throw new Exception\Forbidden('Permission denied to create directory');
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/CorePlugin.php b/vendor/sabre/dav/lib/DAV/CorePlugin.php
index 676cdd04a..ef1dfceb6 100644
--- a/vendor/sabre/dav/lib/DAV/CorePlugin.php
+++ b/vendor/sabre/dav/lib/DAV/CorePlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\DAV\Exception\BadRequest;
@@ -14,8 +16,8 @@ use Sabre\Xml\ParseException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CorePlugin extends ServerPlugin {
-
+class CorePlugin extends ServerPlugin
+{
     /**
      * Reference to server object.
      *
@@ -24,34 +26,32 @@ class CorePlugin extends ServerPlugin {
     protected $server;
 
     /**
-     * Sets up the plugin
+     * Sets up the plugin.
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
+    public function initialize(Server $server)
+    {
         $this->server = $server;
-        $server->on('method:GET',       [$this, 'httpGet']);
-        $server->on('method:OPTIONS',   [$this, 'httpOptions']);
-        $server->on('method:HEAD',      [$this, 'httpHead']);
-        $server->on('method:DELETE',    [$this, 'httpDelete']);
-        $server->on('method:PROPFIND',  [$this, 'httpPropFind']);
+        $server->on('method:GET', [$this, 'httpGet']);
+        $server->on('method:OPTIONS', [$this, 'httpOptions']);
+        $server->on('method:HEAD', [$this, 'httpHead']);
+        $server->on('method:DELETE', [$this, 'httpDelete']);
+        $server->on('method:PROPFIND', [$this, 'httpPropFind']);
         $server->on('method:PROPPATCH', [$this, 'httpPropPatch']);
-        $server->on('method:PUT',       [$this, 'httpPut']);
-        $server->on('method:MKCOL',     [$this, 'httpMkcol']);
-        $server->on('method:MOVE',      [$this, 'httpMove']);
-        $server->on('method:COPY',      [$this, 'httpCopy']);
-        $server->on('method:REPORT',    [$this, 'httpReport']);
-
-        $server->on('propPatch',        [$this, 'propPatchProtectedPropertyCheck'], 90);
-        $server->on('propPatch',        [$this, 'propPatchNodeUpdate'], 200);
-        $server->on('propFind',         [$this, 'propFind']);
-        $server->on('propFind',         [$this, 'propFindNode'], 120);
-        $server->on('propFind',         [$this, 'propFindLate'], 200);
-
-        $server->on('exception',        [$this, 'exception']);
-
+        $server->on('method:PUT', [$this, 'httpPut']);
+        $server->on('method:MKCOL', [$this, 'httpMkcol']);
+        $server->on('method:MOVE', [$this, 'httpMove']);
+        $server->on('method:COPY', [$this, 'httpCopy']);
+        $server->on('method:REPORT', [$this, 'httpReport']);
+
+        $server->on('propPatch', [$this, 'propPatchProtectedPropertyCheck'], 90);
+        $server->on('propPatch', [$this, 'propPatchNodeUpdate'], 200);
+        $server->on('propFind', [$this, 'propFind']);
+        $server->on('propFind', [$this, 'propFindNode'], 120);
+        $server->on('propFind', [$this, 'propFindLate'], 200);
+
+        $server->on('exception', [$this, 'exception']);
     }
 
     /**
@@ -62,34 +62,40 @@ class CorePlugin extends ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'core';
-
     }
 
     /**
      * This is the default implementation for the GET method.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpGet(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGet(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
         $node = $this->server->tree->getNodeForPath($path);
 
-        if (!$node instanceof IFile) return;
-
-        $body = $node->get();
+        if (!$node instanceof IFile) {
+            return;
+        }
 
-        // Converting string into stream, if needed.
-        if (is_string($body)) {
-            $stream = fopen('php://temp', 'r+');
-            fwrite($stream, $body);
-            rewind($stream);
-            $body = $stream;
+        if ('HEAD' === $request->getHeader('X-Sabre-Original-Method')) {
+            $body = '';
+        } else {
+            $body = $node->get();
+
+            // Converting string into stream, if needed.
+            if (is_string($body)) {
+                $stream = fopen('php://temp', 'r+');
+                fwrite($stream, $body);
+                rewind($stream);
+                $body = $stream;
+            }
         }
 
         /*
@@ -105,14 +111,11 @@ class CorePlugin extends ServerPlugin {
             $httpHeaders['Content-Type'] = 'application/octet-stream';
         }
 
-
         if (isset($httpHeaders['Content-Length'])) {
-
             $nodeSize = $httpHeaders['Content-Length'];
 
             // Need to unset Content-Length, because we'll handle that during figuring out the range
             unset($httpHeaders['Content-Length']);
-
         } else {
             $nodeSize = null;
         }
@@ -126,7 +129,6 @@ class CorePlugin extends ServerPlugin {
         // If ifRange is set, and range is specified, we first need to check
         // the precondition.
         if ($nodeSize && $range && $ifRange) {
-
             // if IfRange is parsable as a date we'll treat it as a DateTime
             // otherwise, we must treat it as an etag.
             try {
@@ -134,81 +136,87 @@ class CorePlugin extends ServerPlugin {
 
                 // It's a date. We must check if the entity is modified since
                 // the specified date.
-                if (!isset($httpHeaders['Last-Modified'])) $ignoreRangeHeader = true;
-                else {
+                if (!isset($httpHeaders['Last-Modified'])) {
+                    $ignoreRangeHeader = true;
+                } else {
                     $modified = new \DateTime($httpHeaders['Last-Modified']);
-                    if ($modified > $ifRangeDate) $ignoreRangeHeader = true;
+                    if ($modified > $ifRangeDate) {
+                        $ignoreRangeHeader = true;
+                    }
                 }
-
             } catch (\Exception $e) {
-
                 // It's an entity. We can do a simple comparison.
-                if (!isset($httpHeaders['ETag'])) $ignoreRangeHeader = true;
-                elseif ($httpHeaders['ETag'] !== $ifRange) $ignoreRangeHeader = true;
+                if (!isset($httpHeaders['ETag'])) {
+                    $ignoreRangeHeader = true;
+                } elseif ($httpHeaders['ETag'] !== $ifRange) {
+                    $ignoreRangeHeader = true;
+                }
             }
         }
 
         // We're only going to support HTTP ranges if the backend provided a filesize
         if (!$ignoreRangeHeader && $nodeSize && $range) {
-
             // Determining the exact byte offsets
             if (!is_null($range[0])) {
-
                 $start = $range[0];
                 $end = $range[1] ? $range[1] : $nodeSize - 1;
-                if ($start >= $nodeSize)
-                    throw new Exception\RequestedRangeNotSatisfiable('The start offset (' . $range[0] . ') exceeded the size of the entity (' . $nodeSize . ')');
-
-                if ($end < $start) throw new Exception\RequestedRangeNotSatisfiable('The end offset (' . $range[1] . ') is lower than the start offset (' . $range[0] . ')');
-                if ($end >= $nodeSize) $end = $nodeSize - 1;
-
+                if ($start >= $nodeSize) {
+                    throw new Exception\RequestedRangeNotSatisfiable('The start offset ('.$range[0].') exceeded the size of the entity ('.$nodeSize.')');
+                }
+                if ($end < $start) {
+                    throw new Exception\RequestedRangeNotSatisfiable('The end offset ('.$range[1].') is lower than the start offset ('.$range[0].')');
+                }
+                if ($end >= $nodeSize) {
+                    $end = $nodeSize - 1;
+                }
             } else {
-
                 $start = $nodeSize - $range[1];
                 $end = $nodeSize - 1;
 
-                if ($start < 0) $start = 0;
-
+                if ($start < 0) {
+                    $start = 0;
+                }
             }
 
             // Streams may advertise themselves as seekable, but still not
             // actually allow fseek.  We'll manually go forward in the stream
             // if fseek failed.
-            if (!stream_get_meta_data($body)['seekable'] || fseek($body, $start, SEEK_SET) === -1) {
+            if (!stream_get_meta_data($body)['seekable'] || -1 === fseek($body, $start, SEEK_SET)) {
                 $consumeBlock = 8192;
-                for ($consumed = 0; $start - $consumed > 0;){
-                    if (feof($body)) throw new Exception\RequestedRangeNotSatisfiable('The start offset (' . $start . ') exceeded the size of the entity (' . $consumed . ')');
+                for ($consumed = 0; $start - $consumed > 0;) {
+                    if (feof($body)) {
+                        throw new Exception\RequestedRangeNotSatisfiable('The start offset ('.$start.') exceeded the size of the entity ('.$consumed.')');
+                    }
                     $consumed += strlen(fread($body, min($start - $consumed, $consumeBlock)));
                 }
             }
 
             $response->setHeader('Content-Length', $end - $start + 1);
-            $response->setHeader('Content-Range', 'bytes ' . $start . '-' . $end . '/' . $nodeSize);
+            $response->setHeader('Content-Range', 'bytes '.$start.'-'.$end.'/'.$nodeSize);
             $response->setStatus(206);
             $response->setBody($body);
-
         } else {
-
-            if ($nodeSize) $response->setHeader('Content-Length', $nodeSize);
+            if ($nodeSize) {
+                $response->setHeader('Content-Length', $nodeSize);
+            }
             $response->setStatus(200);
             $response->setBody($body);
-
         }
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * HTTP OPTIONS
+     * HTTP OPTIONS.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpOptions(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpOptions(RequestInterface $request, ResponseInterface $response)
+    {
         $methods = $this->server->getAllowedMethods($request->getPath());
 
         $response->setHeader('Allow', strtoupper(implode(', ', $methods)));
@@ -227,31 +235,31 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * HTTP HEAD
+     * HTTP HEAD.
      *
      * This method is normally used to take a peak at a url, and only get the
      * HTTP response headers, without the body. This is used by clients to
      * determine if a remote file was changed, so they can use a local cached
      * version, instead of downloading it again
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpHead(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpHead(RequestInterface $request, ResponseInterface $response)
+    {
         // This is implemented by changing the HEAD request to a GET request,
-        // and dropping the response body.
+        // and telling the request handler that is doesn't need to create the body.
         $subRequest = clone $request;
         $subRequest->setMethod('GET');
+        $subRequest->setHeader('X-Sabre-Original-Method', 'HEAD');
 
         try {
             $this->server->invokeMethod($subRequest, $response, false);
-            $response->setBody('');
         } catch (Exception\NotImplemented $e) {
             // Some clients may do HEAD requests on collections, however, GET
             // requests and HEAD requests _may_ not be defined on a collection,
@@ -267,23 +275,23 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * HTTP Delete
+     * HTTP Delete.
      *
      * The HTTP delete method, deletes a given uri
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function httpDelete(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpDelete(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
-        if (!$this->server->emit('beforeUnbind', [$path])) return false;
+        if (!$this->server->emit('beforeUnbind', [$path])) {
+            return false;
+        }
         $this->server->tree->delete($path);
         $this->server->emit('afterUnbind', [$path]);
 
@@ -293,11 +301,10 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * WebDAV PROPFIND
+     * WebDAV PROPFIND.
      *
      * This WebDAV method requests information about an uri resource, or a list of resources
      * If a client wants to receive the properties for a single resource it will add an HTTP Depth: header with a 0 value
@@ -308,12 +315,11 @@ class CorePlugin extends ServerPlugin {
      *
      * It has to return a HTTP 207 Multi-status status code
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function httpPropFind(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPropFind(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         $requestBody = $request->getBodyAsString();
@@ -321,7 +327,7 @@ class CorePlugin extends ServerPlugin {
             try {
                 $propFindXml = $this->server->xml->expect('{DAV:}propfind', $requestBody);
             } catch (ParseException $e) {
-                throw new BadRequest($e->getMessage(), null, $e);
+                throw new BadRequest($e->getMessage(), 0, $e);
             }
         } else {
             $propFindXml = new Xml\Request\PropFind();
@@ -331,7 +337,9 @@ class CorePlugin extends ServerPlugin {
 
         $depth = $this->server->getHTTPDepth(1);
         // The only two options for the depth of a propfind is 0 or 1 - as long as depth infinity is not enabled
-        if (!$this->server->enablePropfindDepthInfinity && $depth != 0) $depth = 1;
+        if (!$this->server->enablePropfindDepthInfinity && 0 != $depth) {
+            $depth = 1;
+        }
 
         $newProperties = $this->server->getPropertiesIteratorForPath($path, $propFindXml->properties, $depth);
 
@@ -350,7 +358,7 @@ class CorePlugin extends ServerPlugin {
         $response->setHeader('DAV', implode(', ', $features));
 
         $prefer = $this->server->getHTTPPrefer();
-        $minimal = $prefer['return'] === 'minimal';
+        $minimal = 'minimal' === $prefer['return'];
 
         $data = $this->server->generateMultiStatus($newProperties, $minimal);
         $response->setBody($data);
@@ -358,27 +366,27 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * WebDAV PROPPATCH
+     * WebDAV PROPPATCH.
      *
      * This method is called to update properties on a Node. The request is an XML body with all the mutations.
      * In this XML body it is specified which properties should be set/updated and/or deleted
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpPropPatch(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPropPatch(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         try {
             $propPatch = $this->server->xml->expect('{DAV:}propertyupdate', $request->getBody());
         } catch (ParseException $e) {
-            throw new BadRequest($e->getMessage(), null, $e);
+            throw new BadRequest($e->getMessage(), 0, $e);
         }
         $newProperties = $propPatch->properties;
 
@@ -387,31 +395,27 @@ class CorePlugin extends ServerPlugin {
         $prefer = $this->server->getHTTPPrefer();
         $response->setHeader('Vary', 'Brief,Prefer');
 
-        if ($prefer['return'] === 'minimal') {
-
+        if ('minimal' === $prefer['return']) {
             // If return-minimal is specified, we only have to check if the
             // request was successful, and don't need to return the
             // multi-status.
             $ok = true;
             foreach ($result as $prop => $code) {
-                if ((int)$code > 299) {
+                if ((int) $code > 299) {
                     $ok = false;
                 }
             }
 
             if ($ok) {
-
                 $response->setStatus(204);
-                return false;
 
+                return false;
             }
-
         }
 
         $response->setStatus(207);
         $response->setHeader('Content-Type', 'application/xml; charset=utf-8');
 
-
         // Reorganizing the result for generateMultiStatus
         $multiStatus = [];
         foreach ($result as $propertyName => $code) {
@@ -430,22 +434,22 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * HTTP PUT method
+     * HTTP PUT method.
      *
      * This HTTP method updates a file, or creates a new one.
      *
      * If a new resource was created, a 201 Created status code should be returned. If an existing resource is updated, it's a 204 No Content
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpPut(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPut(RequestInterface $request, ResponseInterface $response)
+    {
         $body = $request->getBodyAsStream();
         $path = $request->getPath();
 
@@ -463,7 +467,6 @@ class CorePlugin extends ServerPlugin {
 
         // Intercepting the Finder problem
         if (($expected = $request->getHeader('X-Expected-Entity-Length')) && $expected > 0) {
-
             /*
             Many webservers will not cooperate well with Finder PUT requests,
             because it uses 'Chunked' transfer encoding for the request body.
@@ -487,7 +490,7 @@ class CorePlugin extends ServerPlugin {
 
             // Only reading first byte
             $firstByte = fread($body, 1);
-            if (strlen($firstByte) !== 1) {
+            if (1 !== strlen($firstByte)) {
                 throw new Exception\Forbidden('This server is not compatible with OS/X finder. Consider using a different WebDAV client or webserver.');
             }
 
@@ -500,26 +503,25 @@ class CorePlugin extends ServerPlugin {
             rewind($newBody);
 
             $body = $newBody;
-
         }
 
         if ($this->server->tree->nodeExists($path)) {
-
             $node = $this->server->tree->getNodeForPath($path);
 
             // If the node is a collection, we'll deny it
-            if (!($node instanceof IFile)) throw new Exception\Conflict('PUT is not allowed on non-files.');
-
+            if (!($node instanceof IFile)) {
+                throw new Exception\Conflict('PUT is not allowed on non-files.');
+            }
             if (!$this->server->updateFile($path, $body, $etag)) {
                 return false;
             }
 
             $response->setHeader('Content-Length', '0');
-            if ($etag) $response->setHeader('ETag', $etag);
+            if ($etag) {
+                $response->setHeader('ETag', $etag);
+            }
             $response->setStatus(204);
-
         } else {
-
             $etag = null;
             // If we got here, the resource didn't exist yet.
             if (!$this->server->createFile($path, $body, $etag)) {
@@ -528,61 +530,55 @@ class CorePlugin extends ServerPlugin {
             }
 
             $response->setHeader('Content-Length', '0');
-            if ($etag) $response->setHeader('ETag', $etag);
+            if ($etag) {
+                $response->setHeader('ETag', $etag);
+            }
             $response->setStatus(201);
-
         }
 
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
-
     /**
-     * WebDAV MKCOL
+     * WebDAV MKCOL.
      *
      * The MKCOL method is used to create a new collection (directory) on the server
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpMkcol(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpMkcol(RequestInterface $request, ResponseInterface $response)
+    {
         $requestBody = $request->getBodyAsString();
         $path = $request->getPath();
 
         if ($requestBody) {
-
             $contentType = $request->getHeader('Content-Type');
-            if (strpos($contentType, 'application/xml') !== 0 && strpos($contentType, 'text/xml') !== 0) {
-
+            if (null === $contentType || (0 !== strpos($contentType, 'application/xml') && 0 !== strpos($contentType, 'text/xml'))) {
                 // We must throw 415 for unsupported mkcol bodies
                 throw new Exception\UnsupportedMediaType('The request body for the MKCOL request must have an xml Content-Type');
-
             }
 
             try {
                 $mkcol = $this->server->xml->expect('{DAV:}mkcol', $requestBody);
             } catch (\Sabre\Xml\ParseException $e) {
-                throw new Exception\BadRequest($e->getMessage(), null, $e);
+                throw new Exception\BadRequest($e->getMessage(), 0, $e);
             }
 
             $properties = $mkcol->getProperties();
 
-            if (!isset($properties['{DAV:}resourcetype']))
+            if (!isset($properties['{DAV:}resourcetype'])) {
                 throw new Exception\BadRequest('The mkcol request must include a {DAV:}resourcetype property');
-
+            }
             $resourceType = $properties['{DAV:}resourcetype']->getValue();
             unset($properties['{DAV:}resourcetype']);
-
         } else {
-
             $properties = [];
             $resourceType = ['{DAV:}collection'];
-
         }
 
         $mkcol = new MkCol($resourceType, $properties);
@@ -596,7 +592,6 @@ class CorePlugin extends ServerPlugin {
             $response->setBody(
                 $this->server->generateMultiStatus([$result])
             );
-
         } else {
             $response->setHeader('Content-Length', '0');
             $response->setStatus(201);
@@ -605,38 +600,42 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * WebDAV HTTP MOVE method
+     * WebDAV HTTP MOVE method.
      *
      * This method moves one uri to a different uri. A lot of the actual request processing is done in getCopyMoveInfo
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpMove(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpMove(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         $moveInfo = $this->server->getCopyAndMoveInfo($request);
 
         if ($moveInfo['destinationExists']) {
-
-            if (!$this->server->emit('beforeUnbind', [$moveInfo['destination']])) return false;
-
+            if (!$this->server->emit('beforeUnbind', [$moveInfo['destination']])) {
+                return false;
+            }
+        }
+        if (!$this->server->emit('beforeUnbind', [$path])) {
+            return false;
+        }
+        if (!$this->server->emit('beforeBind', [$moveInfo['destination']])) {
+            return false;
+        }
+        if (!$this->server->emit('beforeMove', [$path, $moveInfo['destination']])) {
+            return false;
         }
-        if (!$this->server->emit('beforeUnbind', [$path])) return false;
-        if (!$this->server->emit('beforeBind', [$moveInfo['destination']])) return false;
-        if (!$this->server->emit('beforeMove', [$path, $moveInfo['destination']])) return false;
 
         if ($moveInfo['destinationExists']) {
-
             $this->server->tree->delete($moveInfo['destination']);
             $this->server->emit('afterUnbind', [$moveInfo['destination']]);
-
         }
 
         $this->server->tree->move($path, $moveInfo['destination']);
@@ -656,28 +655,32 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
-     * WebDAV HTTP COPY method
+     * WebDAV HTTP COPY method.
      *
      * This method copies one uri to a different uri, and works much like the MOVE request
      * A lot of the actual request processing is done in getCopyMoveInfo
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpCopy(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpCopy(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         $copyInfo = $this->server->getCopyAndMoveInfo($request);
 
-        if (!$this->server->emit('beforeBind', [$copyInfo['destination']])) return false;
+        if (!$this->server->emit('beforeBind', [$copyInfo['destination']])) {
+            return false;
+        }
         if ($copyInfo['destinationExists']) {
-            if (!$this->server->emit('beforeUnbind', [$copyInfo['destination']])) return false;
+            if (!$this->server->emit('beforeUnbind', [$copyInfo['destination']])) {
+                return false;
+            }
             $this->server->tree->delete($copyInfo['destination']);
         }
 
@@ -691,22 +694,21 @@ class CorePlugin extends ServerPlugin {
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
-
     }
 
     /**
-     * HTTP REPORT method implementation
+     * HTTP REPORT method implementation.
      *
      * Although the REPORT method is not part of the standard WebDAV spec (it's from rfc3253)
      * It's used in a lot of extensions, so it made sense to implement it into the core.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpReport(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpReport(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         $result = $this->server->xml->parse(
@@ -716,16 +718,13 @@ class CorePlugin extends ServerPlugin {
         );
 
         if ($this->server->emit('report', [$rootElementName, $result, $path])) {
-
             // If emit returned true, it means the report was not supported
             throw new Exception\ReportNotSupported();
-
         }
 
         // Sending back false will interrupt the event chain and tell the server
         // we've handled this method.
         return false;
-
     }
 
     /**
@@ -734,12 +733,11 @@ class CorePlugin extends ServerPlugin {
      * Here we check if a user attempted to update a protected property and
      * ensure that the process fails if this is the case.
      *
-     * @param string $path
+     * @param string    $path
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatchProtectedPropertyCheck($path, PropPatch $propPatch) {
-
+    public function propPatchProtectedPropertyCheck($path, PropPatch $propPatch)
+    {
         // Comparing the mutation list to the list of protected properties.
         $mutations = $propPatch->getMutations();
 
@@ -751,7 +749,6 @@ class CorePlugin extends ServerPlugin {
         if ($protected) {
             $propPatch->setResultCode($protected, 403);
         }
-
     }
 
     /**
@@ -760,19 +757,17 @@ class CorePlugin extends ServerPlugin {
      * Here we check if a node implements IProperties and let the node handle
      * updating of (some) properties.
      *
-     * @param string $path
+     * @param string    $path
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatchNodeUpdate($path, PropPatch $propPatch) {
-
+    public function propPatchNodeUpdate($path, PropPatch $propPatch)
+    {
         // This should trigger a 404 if the node doesn't exist.
         $node = $this->server->tree->getNodeForPath($path);
 
         if ($node instanceof IProperties) {
             $node->propPatch($propPatch);
         }
-
     }
 
     /**
@@ -781,12 +776,11 @@ class CorePlugin extends ServerPlugin {
      * Here we add all the default properties.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFind(PropFind $propFind, INode $node) {
-
-        $propFind->handle('{DAV:}getlastmodified', function() use ($node) {
+    public function propFind(PropFind $propFind, INode $node)
+    {
+        $propFind->handle('{DAV:}getlastmodified', function () use ($node) {
             $lm = $node->getLastModified();
             if ($lm) {
                 return new Xml\Property\GetLastModified($lm);
@@ -801,34 +795,36 @@ class CorePlugin extends ServerPlugin {
 
         if ($node instanceof IQuota) {
             $quotaInfo = null;
-            $propFind->handle('{DAV:}quota-used-bytes', function() use (&$quotaInfo, $node) {
+            $propFind->handle('{DAV:}quota-used-bytes', function () use (&$quotaInfo, $node) {
                 $quotaInfo = $node->getQuotaInfo();
+
                 return $quotaInfo[0];
             });
-            $propFind->handle('{DAV:}quota-available-bytes', function() use (&$quotaInfo, $node) {
+            $propFind->handle('{DAV:}quota-available-bytes', function () use (&$quotaInfo, $node) {
                 if (!$quotaInfo) {
                     $quotaInfo = $node->getQuotaInfo();
                 }
+
                 return $quotaInfo[1];
             });
         }
 
-        $propFind->handle('{DAV:}supported-report-set', function() use ($propFind) {
+        $propFind->handle('{DAV:}supported-report-set', function () use ($propFind) {
             $reports = [];
             foreach ($this->server->getPlugins() as $plugin) {
                 $reports = array_merge($reports, $plugin->getSupportedReportSet($propFind->getPath()));
             }
+
             return new Xml\Property\SupportedReportSet($reports);
         });
-        $propFind->handle('{DAV:}resourcetype', function() use ($node) {
+        $propFind->handle('{DAV:}resourcetype', function () use ($node) {
             return new Xml\Property\ResourceType($this->server->getResourceTypeForNode($node));
         });
-        $propFind->handle('{DAV:}supported-method-set', function() use ($propFind) {
+        $propFind->handle('{DAV:}supported-method-set', function () use ($propFind) {
             return new Xml\Property\SupportedMethodSet(
                 $this->server->getAllowedMethods($propFind->getPath())
             );
         });
-
     }
 
     /**
@@ -838,20 +834,16 @@ class CorePlugin extends ServerPlugin {
      * populate the result.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFindNode(PropFind $propFind, INode $node) {
-
+    public function propFindNode(PropFind $propFind, INode $node)
+    {
         if ($node instanceof IProperties && $propertyNames = $propFind->get404Properties()) {
-
             $nodeProperties = $node->getProperties($propertyNames);
             foreach ($nodeProperties as $propertyName => $propertyValue) {
                 $propFind->set($propertyName, $propertyValue, 200);
             }
-
         }
-
     }
 
     /**
@@ -861,17 +853,17 @@ class CorePlugin extends ServerPlugin {
      * want other systems to first have a chance to handle the properties.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFindLate(PropFind $propFind, INode $node) {
-
-        $propFind->handle('{http://calendarserver.org/ns/}getctag', function() use ($propFind) {
-
+    public function propFindLate(PropFind $propFind, INode $node)
+    {
+        $propFind->handle('{http://calendarserver.org/ns/}getctag', function () use ($propFind) {
             // If we already have a sync-token from the current propFind
             // request, we can re-use that.
             $val = $propFind->get('{http://sabredav.org/ns}sync-token');
-            if ($val) return $val;
+            if ($val) {
+                return $val;
+            }
 
             $val = $propFind->get('{DAV:}sync-token');
             if ($val && is_scalar($val)) {
@@ -899,9 +891,7 @@ class CorePlugin extends ServerPlugin {
                     return substr($val->getHref(), strlen(Sync\Plugin::SYNCTOKEN_PREFIX));
                 }
             }
-
         });
-
     }
 
     /**
@@ -909,8 +899,8 @@ class CorePlugin extends ServerPlugin {
      *
      * @param Exception $e
      */
-    function exception($e) {
-
+    public function exception($e)
+    {
         $logLevel = \Psr\Log\LogLevel::CRITICAL;
         if ($e instanceof \Sabre\DAV\Exception) {
             // If it's a standard sabre/dav exception, it means we have a http
@@ -947,13 +937,12 @@ class CorePlugin extends ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'The Core plugin provides a lot of the basic functionality required by WebDAV, such as a default implementation for all HTTP and WebDAV methods.',
-            'link'        => null,
+            'link' => null,
         ];
-
     }
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception.php b/vendor/sabre/dav/lib/DAV/Exception.php
index 14f5bab2a..e1d990623 100644
--- a/vendor/sabre/dav/lib/DAV/Exception.php
+++ b/vendor/sabre/dav/lib/DAV/Exception.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
@@ -15,29 +17,26 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Exception extends \Exception {
-
+class Exception extends \Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 500;
-
     }
 
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param Server $server
+     * @param Server      $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(Server $server, \DOMElement $errorNode) {
-
-
+    public function serialize(Server $server, \DOMElement $errorNode)
+    {
     }
 
     /**
@@ -46,12 +45,11 @@ class Exception extends \Exception {
      * The headers must be returned as an array.
      *
      * @param Server $server
+     *
      * @return array
      */
-    function getHTTPHeaders(Server $server) {
-
+    public function getHTTPHeaders(Server $server)
+    {
         return [];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/BadRequest.php b/vendor/sabre/dav/lib/DAV/Exception/BadRequest.php
index c21f493da..569c63ba0 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/BadRequest.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/BadRequest.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * BadRequest
+ * BadRequest.
  *
  * The BadRequest is thrown when the user submitted an invalid HTTP request
  * BadRequest
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class BadRequest extends DAV\Exception {
-
+class BadRequest extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 400;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/Conflict.php b/vendor/sabre/dav/lib/DAV/Exception/Conflict.php
index 4190e6082..2ec227feb 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/Conflict.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/Conflict.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * Conflict
+ * Conflict.
  *
  * A 409 Conflict is thrown when a user tried to make a directory over an existing
  * file or in a parent directory that doesn't exist.
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Conflict extends DAV\Exception {
-
+class Conflict extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 409;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/ConflictingLock.php b/vendor/sabre/dav/lib/DAV/Exception/ConflictingLock.php
index b2d2746c5..c1a4914ed 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/ConflictingLock.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/ConflictingLock.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * ConflictingLock
+ * ConflictingLock.
  *
  * Similar to  the Locked exception, this exception thrown when a LOCK request
  * was made, on a resource which was already locked
@@ -14,23 +16,20 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ConflictingLock extends Locked {
-
+class ConflictingLock extends Locked
+{
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         if ($this->lock) {
             $error = $errorNode->ownerDocument->createElementNS('DAV:', 'd:no-conflicting-lock');
             $errorNode->appendChild($error);
             $error->appendChild($errorNode->ownerDocument->createElementNS('DAV:', 'd:href', $this->lock->uri));
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/Forbidden.php b/vendor/sabre/dav/lib/DAV/Exception/Forbidden.php
index 77df7ca9e..2f882c396 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/Forbidden.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/Forbidden.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * Forbidden
+ * Forbidden.
  *
  * This exception is thrown whenever a user tries to do an operation he's not allowed to
  *
@@ -13,17 +15,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Forbidden extends DAV\Exception {
-
+class Forbidden extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 403;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/InsufficientStorage.php b/vendor/sabre/dav/lib/DAV/Exception/InsufficientStorage.php
index 96e1acc50..fe6e1268c 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/InsufficientStorage.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/InsufficientStorage.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * InsufficientStorage
+ * InsufficientStorage.
  *
  * This Exception can be thrown, when for example a harddisk is full or a quota is exceeded
  *
@@ -13,17 +15,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InsufficientStorage extends DAV\Exception {
-
+class InsufficientStorage extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 507;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/InvalidResourceType.php b/vendor/sabre/dav/lib/DAV/Exception/InvalidResourceType.php
index 6324d9f3a..99baeb8bc 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/InvalidResourceType.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/InvalidResourceType.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 /**
- * InvalidResourceType
+ * InvalidResourceType.
  *
  * This exception is thrown when the user tried to create a new collection, with
  * a special resourcetype value that was not recognized by the server.
@@ -14,20 +16,17 @@ namespace Sabre\DAV\Exception;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InvalidResourceType extends Forbidden {
-
+class InvalidResourceType extends Forbidden
+{
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
      * @param \Sabre\DAV\Server $server
-     * @param \DOMElement $errorNode
-     * @return void
+     * @param \DOMElement       $errorNode
      */
-    function serialize(\Sabre\DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(\Sabre\DAV\Server $server, \DOMElement $errorNode)
+    {
         $error = $errorNode->ownerDocument->createElementNS('DAV:', 'd:valid-resourcetype');
         $errorNode->appendChild($error);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/InvalidSyncToken.php b/vendor/sabre/dav/lib/DAV/Exception/InvalidSyncToken.php
index 51a253b29..6c5f1c435 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/InvalidSyncToken.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/InvalidSyncToken.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * InvalidSyncToken
+ * InvalidSyncToken.
  *
  * This exception is emited for the {DAV:}valid-sync-token pre-condition, as
  * defined in rfc6578, section 3.2.
@@ -19,20 +21,17 @@ use Sabre\DAV;
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InvalidSyncToken extends Forbidden {
-
+class InvalidSyncToken extends Forbidden
+{
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $error = $errorNode->ownerDocument->createElementNS('DAV:', 'd:valid-sync-token');
         $errorNode->appendChild($error);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/LengthRequired.php b/vendor/sabre/dav/lib/DAV/Exception/LengthRequired.php
index 989718558..9d26fcb10 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/LengthRequired.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/LengthRequired.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * LengthRequired
+ * LengthRequired.
  *
  * This exception is thrown when a request was made that required a
  * Content-Length header, but did not contain one.
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class LengthRequired extends DAV\Exception {
-
+class LengthRequired extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 411;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/LockTokenMatchesRequestUri.php b/vendor/sabre/dav/lib/DAV/Exception/LockTokenMatchesRequestUri.php
index 5f8c31868..1c7402384 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/LockTokenMatchesRequestUri.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/LockTokenMatchesRequestUri.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * LockTokenMatchesRequestUri
+ * LockTokenMatchesRequestUri.
  *
  * This exception is thrown by UNLOCK if a supplied lock-token is invalid
  *
@@ -13,29 +15,25 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class LockTokenMatchesRequestUri extends Conflict {
-
+class LockTokenMatchesRequestUri extends Conflict
+{
     /**
-     * Creates the exception
+     * Creates the exception.
      */
-    function __construct() {
-
-        $this->message = 'The locktoken supplied does not match any locks on this entity';
-
+    public function __construct()
+    {
+        parent::__construct('The locktoken supplied does not match any locks on this entity');
     }
 
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $error = $errorNode->ownerDocument->createElementNS('DAV:', 'd:lock-token-matches-request-uri');
         $errorNode->appendChild($error);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/Locked.php b/vendor/sabre/dav/lib/DAV/Exception/Locked.php
index 8176db46e..632bafc60 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/Locked.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/Locked.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * Locked
+ * Locked.
  *
  * The 423 is thrown when a client tried to access a resource that was locked, without supplying a valid lock token
  *
@@ -13,49 +15,48 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Locked extends DAV\Exception {
-
+class Locked extends DAV\Exception
+{
     /**
-     * Lock information
+     * Lock information.
      *
-     * @var Sabre\DAV\Locks\LockInfo
+     * @var \Sabre\DAV\Locks\LockInfo
      */
     protected $lock;
 
     /**
-     * Creates the exception
+     * Creates the exception.
      *
      * A LockInfo object should be passed if the user should be informed
      * which lock actually has the file locked.
      *
      * @param DAV\Locks\LockInfo $lock
      */
-    function __construct(DAV\Locks\LockInfo $lock = null) {
+    public function __construct(DAV\Locks\LockInfo $lock = null)
+    {
+        parent::__construct();
 
         $this->lock = $lock;
-
     }
 
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 423;
-
     }
 
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         if ($this->lock) {
             $error = $errorNode->ownerDocument->createElementNS('DAV:', 'd:lock-token-submitted');
             $errorNode->appendChild($error);
@@ -66,7 +67,5 @@ class Locked extends DAV\Exception {
                 $href
             );
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/MethodNotAllowed.php b/vendor/sabre/dav/lib/DAV/Exception/MethodNotAllowed.php
index 30c1c2553..a3d9c56f2 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/MethodNotAllowed.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/MethodNotAllowed.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * MethodNotAllowed
+ * MethodNotAllowed.
  *
  * The 405 is thrown when a client tried to create a directory on an already existing directory
  *
@@ -13,17 +15,16 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MethodNotAllowed extends DAV\Exception {
-
+class MethodNotAllowed extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 405;
-
     }
 
     /**
@@ -32,16 +33,15 @@ class MethodNotAllowed extends DAV\Exception {
      * The headers must be returned as an array.
      *
      * @param \Sabre\DAV\Server $server
+     *
      * @return array
      */
-    function getHTTPHeaders(\Sabre\DAV\Server $server) {
-
+    public function getHTTPHeaders(\Sabre\DAV\Server $server)
+    {
         $methods = $server->getAllowedMethods($server->getRequestUri());
 
         return [
             'Allow' => strtoupper(implode(', ', $methods)),
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/NotAuthenticated.php b/vendor/sabre/dav/lib/DAV/Exception/NotAuthenticated.php
index e69a60c75..0a5ba9b5a 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/NotAuthenticated.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/NotAuthenticated.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * NotAuthenticated
+ * NotAuthenticated.
  *
  * This exception is thrown when the client did not provide valid
  * authentication credentials.
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class NotAuthenticated extends DAV\Exception {
-
+class NotAuthenticated extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 401;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/NotFound.php b/vendor/sabre/dav/lib/DAV/Exception/NotFound.php
index b0397446d..9cf837074 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/NotFound.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/NotFound.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * NotFound
+ * NotFound.
  *
  * This Exception is thrown when a Node couldn't be found. It returns HTTP error code 404
  *
@@ -13,17 +15,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class NotFound extends DAV\Exception {
-
+class NotFound extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 404;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/NotImplemented.php b/vendor/sabre/dav/lib/DAV/Exception/NotImplemented.php
index 68f309222..cebb83363 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/NotImplemented.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/NotImplemented.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * NotImplemented
+ * NotImplemented.
  *
  * This exception is thrown when the client tried to call an unsupported HTTP method or other feature
  *
@@ -13,17 +15,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class NotImplemented extends DAV\Exception {
-
+class NotImplemented extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 501;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/PaymentRequired.php b/vendor/sabre/dav/lib/DAV/Exception/PaymentRequired.php
index 43e17344a..d237f906b 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/PaymentRequired.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/PaymentRequired.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * Payment Required
+ * Payment Required.
  *
  * The PaymentRequired exception may be thrown in a case where a user must pay
  * to access a certain resource or operation.
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PaymentRequired extends DAV\Exception {
-
+class PaymentRequired extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 402;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/PreconditionFailed.php b/vendor/sabre/dav/lib/DAV/Exception/PreconditionFailed.php
index 550360e5a..20d8a2a30 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/PreconditionFailed.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/PreconditionFailed.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * PreconditionFailed
+ * PreconditionFailed.
  *
  * This exception is normally thrown when a client submitted a conditional request,
  * like for example an If, If-None-Match or If-Match header, which caused the HTTP
@@ -15,8 +17,8 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PreconditionFailed extends DAV\Exception {
-
+class PreconditionFailed extends DAV\Exception
+{
     /**
      * When this exception is thrown, the header-name might be set.
      *
@@ -28,44 +30,39 @@ class PreconditionFailed extends DAV\Exception {
     public $header = null;
 
     /**
-     * Create the exception
+     * Create the exception.
      *
      * @param string $message
      * @param string $header
      */
-    function __construct($message, $header = null) {
-
+    public function __construct($message, $header = null)
+    {
         parent::__construct($message);
         $this->header = $header;
-
     }
 
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 412;
-
     }
 
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         if ($this->header) {
             $prop = $errorNode->ownerDocument->createElement('s:header');
             $prop->nodeValue = $this->header;
             $errorNode->appendChild($prop);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/ReportNotSupported.php b/vendor/sabre/dav/lib/DAV/Exception/ReportNotSupported.php
index a83695627..cecfec12d 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/ReportNotSupported.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/ReportNotSupported.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * ReportNotSupported
+ * ReportNotSupported.
  *
  * This exception is thrown when the client requested an unknown report through the REPORT method
  *
@@ -13,20 +15,17 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ReportNotSupported extends UnsupportedMediaType {
-
+class ReportNotSupported extends UnsupportedMediaType
+{
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $error = $errorNode->ownerDocument->createElementNS('DAV:', 'd:supported-report');
         $errorNode->appendChild($error);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/RequestedRangeNotSatisfiable.php b/vendor/sabre/dav/lib/DAV/Exception/RequestedRangeNotSatisfiable.php
index c8ccfc062..6ccb5b8c8 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/RequestedRangeNotSatisfiable.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/RequestedRangeNotSatisfiable.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * RequestedRangeNotSatisfiable
+ * RequestedRangeNotSatisfiable.
  *
  * This exception is normally thrown when the user
  * request a range that is out of the entity bounds.
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class RequestedRangeNotSatisfiable extends DAV\Exception {
-
+class RequestedRangeNotSatisfiable extends DAV\Exception
+{
     /**
-     * returns the http statuscode for this exception
+     * returns the http statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 416;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/ServiceUnavailable.php b/vendor/sabre/dav/lib/DAV/Exception/ServiceUnavailable.php
index 31df606e2..43c995c9c 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/ServiceUnavailable.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/ServiceUnavailable.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * ServiceUnavailable
+ * ServiceUnavailable.
  *
  * This exception is thrown in case the service
  * is currently not available (e.g. down for maintenance).
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ServiceUnavailable extends DAV\Exception {
-
+class ServiceUnavailable extends DAV\Exception
+{
     /**
-     * Returns the HTTP statuscode for this exception
+     * Returns the HTTP statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 503;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/TooManyMatches.php b/vendor/sabre/dav/lib/DAV/Exception/TooManyMatches.php
index d0f0f84e8..7dbe878b9 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/TooManyMatches.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/TooManyMatches.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * TooManyMatches
+ * TooManyMatches.
  *
  * This exception is emited for the {DAV:}number-of-matches-within-limits
  * post-condition, as defined in rfc6578, section 3.2.
@@ -19,20 +21,17 @@ use Sabre\DAV;
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class TooManyMatches extends Forbidden {
-
+class TooManyMatches extends Forbidden
+{
     /**
-     * This method allows the exception to include additional information into the WebDAV error response
+     * This method allows the exception to include additional information into the WebDAV error response.
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $error = $errorNode->ownerDocument->createElementNS('DAV:', 'd:number-of-matches-within-limits');
         $errorNode->appendChild($error);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Exception/UnsupportedMediaType.php b/vendor/sabre/dav/lib/DAV/Exception/UnsupportedMediaType.php
index f3d92842d..bc9da30da 100644
--- a/vendor/sabre/dav/lib/DAV/Exception/UnsupportedMediaType.php
+++ b/vendor/sabre/dav/lib/DAV/Exception/UnsupportedMediaType.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use Sabre\DAV;
 
 /**
- * UnSupportedMediaType
+ * UnSupportedMediaType.
  *
  * The 415 Unsupported Media Type status code is generally sent back when the client
  * tried to call an HTTP method, with a body the server didn't understand
@@ -14,17 +16,15 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class UnsupportedMediaType extends DAV\Exception {
-
+class UnsupportedMediaType extends DAV\Exception
+{
     /**
-     * returns the http statuscode for this exception
+     * returns the http statuscode for this exception.
      *
      * @return int
      */
-    function getHTTPCode() {
-
+    public function getHTTPCode()
+    {
         return 415;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/FS/Directory.php b/vendor/sabre/dav/lib/DAV/FS/Directory.php
index 362f7a411..047692294 100644
--- a/vendor/sabre/dav/lib/DAV/FS/Directory.php
+++ b/vendor/sabre/dav/lib/DAV/FS/Directory.php
@@ -1,20 +1,22 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\FS;
 
 use Sabre\DAV;
 
 /**
- * Directory class
+ * Directory class.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Directory extends Node implements DAV\ICollection, DAV\IQuota {
-
+class Directory extends Node implements DAV\ICollection, DAV\IQuota
+{
     /**
-     * Creates a new file in the directory
+     * Creates a new file in the directory.
      *
      * Data will either be supplied as a stream resource, or in certain cases
      * as a string. Keep in mind that you may have to support either.
@@ -33,67 +35,63 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota {
      * return the same contents of what was submitted here, you are strongly
      * recommended to omit the ETag.
      *
-     * @param string $name Name of the file
+     * @param string          $name Name of the file
      * @param resource|string $data Initial payload
-     * @return null|string
+     *
+     * @return string|null
      */
-    function createFile($name, $data = null) {
-
-        $newPath = $this->path . '/' . $name;
+    public function createFile($name, $data = null)
+    {
+        $newPath = $this->path.'/'.$name;
         file_put_contents($newPath, $data);
         clearstatcache(true, $newPath);
-
     }
 
     /**
-     * Creates a new subdirectory
+     * Creates a new subdirectory.
      *
      * @param string $name
-     * @return void
      */
-    function createDirectory($name) {
-
-        $newPath = $this->path . '/' . $name;
+    public function createDirectory($name)
+    {
+        $newPath = $this->path.'/'.$name;
         mkdir($newPath);
         clearstatcache(true, $newPath);
-
     }
 
     /**
-     * Returns a specific child node, referenced by its name
+     * Returns a specific child node, referenced by its name.
      *
      * This method must throw DAV\Exception\NotFound if the node does not
      * exist.
      *
      * @param string $name
+     *
      * @throws DAV\Exception\NotFound
+     *
      * @return DAV\INode
      */
-    function getChild($name) {
-
-        $path = $this->path . '/' . $name;
-
-        if (!file_exists($path)) throw new DAV\Exception\NotFound('File with name ' . $path . ' could not be located');
+    public function getChild($name)
+    {
+        $path = $this->path.'/'.$name;
 
+        if (!file_exists($path)) {
+            throw new DAV\Exception\NotFound('File with name '.$path.' could not be located');
+        }
         if (is_dir($path)) {
-
             return new self($path);
-
         } else {
-
             return new File($path);
-
         }
-
     }
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return DAV\INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $nodes = [];
         $iterator = new \FilesystemIterator(
             $this->path,
@@ -101,51 +99,49 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota {
           | \FilesystemIterator::SKIP_DOTS
         );
         foreach ($iterator as $entry) {
-
             $nodes[] = $this->getChild($entry->getFilename());
-
         }
-        return $nodes;
 
+        return $nodes;
     }
 
     /**
      * Checks if a child exists.
      *
      * @param string $name
+     *
      * @return bool
      */
-    function childExists($name) {
+    public function childExists($name)
+    {
+        $path = $this->path.'/'.$name;
 
-        $path = $this->path . '/' . $name;
         return file_exists($path);
-
     }
 
     /**
-     * Deletes all files in this directory, and then itself
-     *
-     * @return void
+     * Deletes all files in this directory, and then itself.
      */
-    function delete() {
-
-        foreach ($this->getChildren() as $child) $child->delete();
+    public function delete()
+    {
+        foreach ($this->getChildren() as $child) {
+            $child->delete();
+        }
         rmdir($this->path);
-
     }
 
     /**
-     * Returns available diskspace information
+     * Returns available diskspace information.
      *
      * @return array
      */
-    function getQuotaInfo() {
+    public function getQuotaInfo()
+    {
         $absolute = realpath($this->path);
+
         return [
             disk_total_space($absolute) - disk_free_space($absolute),
-            disk_free_space($absolute)
+            disk_free_space($absolute),
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/FS/File.php b/vendor/sabre/dav/lib/DAV/FS/File.php
index 4fc5af057..b78a80138 100644
--- a/vendor/sabre/dav/lib/DAV/FS/File.php
+++ b/vendor/sabre/dav/lib/DAV/FS/File.php
@@ -1,66 +1,61 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\FS;
 
 use Sabre\DAV;
 
 /**
- * File class
+ * File class.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class File extends Node implements DAV\IFile {
-
+class File extends Node implements DAV\IFile
+{
     /**
-     * Updates the data
+     * Updates the data.
      *
      * @param resource $data
-     * @return void
      */
-    function put($data) {
-
+    public function put($data)
+    {
         file_put_contents($this->path, $data);
         clearstatcache(true, $this->path);
-
     }
 
     /**
-     * Returns the data
+     * Returns the data.
      *
      * @return resource
      */
-    function get() {
-
+    public function get()
+    {
         return fopen($this->path, 'r');
-
     }
 
     /**
-     * Delete the current file
-     *
-     * @return void
+     * Delete the current file.
      */
-    function delete() {
-
+    public function delete()
+    {
         unlink($this->path);
-
     }
 
     /**
-     * Returns the size of the node, in bytes
+     * Returns the size of the node, in bytes.
      *
      * @return int
      */
-    function getSize() {
-
+    public function getSize()
+    {
         return filesize($this->path);
-
     }
 
     /**
-     * Returns the ETag for a file
+     * Returns the ETag for a file.
      *
      * An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
      * The ETag is an arbitrary string, but MUST be surrounded by double-quotes.
@@ -69,27 +64,24 @@ class File extends Node implements DAV\IFile {
      *
      * @return mixed
      */
-    function getETag() {
-
-        return '"' . sha1(
-            fileinode($this->path) .
-            filesize($this->path) .
+    public function getETag()
+    {
+        return '"'.sha1(
+            fileinode($this->path).
+            filesize($this->path).
             filemtime($this->path)
-        ) . '"';
-
+        ).'"';
     }
 
     /**
-     * Returns the mime-type for a file
+     * Returns the mime-type for a file.
      *
      * If null is returned, we'll assume application/octet-stream
      *
      * @return mixed
      */
-    function getContentType() {
-
+    public function getContentType()
+    {
         return null;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/FS/Node.php b/vendor/sabre/dav/lib/DAV/FS/Node.php
index 424718f96..32aa74755 100644
--- a/vendor/sabre/dav/lib/DAV/FS/Node.php
+++ b/vendor/sabre/dav/lib/DAV/FS/Node.php
@@ -1,12 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\FS;
 
-use Sabre\DAV;
-use Sabre\HTTP\URLUtil;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\INode;
+use Sabre\Uri;
 
 /**
- * Base node-class
+ * Base node-class.
  *
  * The node class implements the method used by both the File and the Directory classes
  *
@@ -14,67 +17,80 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Node implements DAV\INode {
-
+abstract class Node implements INode
+{
     /**
-     * The path to the current node
+     * The path to the current node.
      *
      * @var string
      */
     protected $path;
 
     /**
-     * Sets up the node, expects a full path name
+     * The overridden name of the node.
      *
-     * @param string $path
+     * @var string
      */
-    function __construct($path) {
+    protected $overrideName;
 
+    /**
+     * Sets up the node, expects a full path name.
+     *
+     * If $overrideName is set, this node shows up in the tree under a
+     * different name. In this case setName() will be disabled.
+     *
+     * @param string $path
+     * @param string $overrideName
+     */
+    public function __construct($path, $overrideName = null)
+    {
         $this->path = $path;
-
+        $this->overrideName = $overrideName;
     }
 
-
-
     /**
-     * Returns the name of the node
+     * Returns the name of the node.
      *
      * @return string
      */
-    function getName() {
+    public function getName()
+    {
+        if ($this->overrideName) {
+            return $this->overrideName;
+        }
 
-        list(, $name) = URLUtil::splitPath($this->path);
-        return $name;
+        list(, $name) = Uri\split($this->path);
 
+        return $name;
     }
 
     /**
-     * Renames the node
+     * Renames the node.
      *
      * @param string $name The new name
-     * @return void
      */
-    function setName($name) {
+    public function setName($name)
+    {
+        if ($this->overrideName) {
+            throw new Forbidden('This node cannot be renamed');
+        }
 
-        list($parentPath, ) = URLUtil::splitPath($this->path);
-        list(, $newName) = URLUtil::splitPath($name);
+        list($parentPath) = Uri\split($this->path);
+        list(, $newName) = Uri\split($name);
 
-        $newPath = $parentPath . '/' . $newName;
+        $newPath = $parentPath.'/'.$newName;
         rename($this->path, $newPath);
 
         $this->path = $newPath;
-
     }
 
     /**
-     * Returns the last modification time, as a unix timestamp
+     * Returns the last modification time, as a unix timestamp.
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return filemtime($this->path);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/FSExt/Directory.php b/vendor/sabre/dav/lib/DAV/FSExt/Directory.php
index dd5f992db..d6aea0094 100644
--- a/vendor/sabre/dav/lib/DAV/FSExt/Directory.php
+++ b/vendor/sabre/dav/lib/DAV/FSExt/Directory.php
@@ -1,21 +1,23 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\FSExt;
 
 use Sabre\DAV;
 use Sabre\DAV\FS\Node;
 
 /**
- * Directory class
+ * Directory class.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTarget {
-
+class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTarget
+{
     /**
-     * Creates a new file in the directory
+     * Creates a new file in the directory.
      *
      * Data will either be supplied as a stream resource, or in certain cases
      * as a string. Keep in mind that you may have to support either.
@@ -34,94 +36,97 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTa
      * return the same contents of what was submitted here, you are strongly
      * recommended to omit the ETag.
      *
-     * @param string $name Name of the file
+     * @param string          $name Name of the file
      * @param resource|string $data Initial payload
-     * @return null|string
+     *
+     * @return string|null
      */
-    function createFile($name, $data = null) {
-
+    public function createFile($name, $data = null)
+    {
         // We're not allowing dots
-        if ($name == '.' || $name == '..') throw new DAV\Exception\Forbidden('Permission denied to . and ..');
-        $newPath = $this->path . '/' . $name;
+        if ('.' == $name || '..' == $name) {
+            throw new DAV\Exception\Forbidden('Permission denied to . and ..');
+        }
+        $newPath = $this->path.'/'.$name;
         file_put_contents($newPath, $data);
         clearstatcache(true, $newPath);
 
-        return '"' . sha1(
-            fileinode($newPath) .
-            filesize($newPath) .
+        return '"'.sha1(
+            fileinode($newPath).
+            filesize($newPath).
             filemtime($newPath)
-        ) . '"';
-
+        ).'"';
     }
 
     /**
-     * Creates a new subdirectory
+     * Creates a new subdirectory.
      *
      * @param string $name
-     * @return void
      */
-    function createDirectory($name) {
-
+    public function createDirectory($name)
+    {
         // We're not allowing dots
-        if ($name == '.' || $name == '..') throw new DAV\Exception\Forbidden('Permission denied to . and ..');
-        $newPath = $this->path . '/' . $name;
+        if ('.' == $name || '..' == $name) {
+            throw new DAV\Exception\Forbidden('Permission denied to . and ..');
+        }
+        $newPath = $this->path.'/'.$name;
         mkdir($newPath);
         clearstatcache(true, $newPath);
-
     }
 
     /**
-     * Returns a specific child node, referenced by its name
+     * Returns a specific child node, referenced by its name.
      *
      * This method must throw Sabre\DAV\Exception\NotFound if the node does not
      * exist.
      *
      * @param string $name
+     *
      * @throws DAV\Exception\NotFound
+     *
      * @return DAV\INode
      */
-    function getChild($name) {
-
-        $path = $this->path . '/' . $name;
-
-        if (!file_exists($path)) throw new DAV\Exception\NotFound('File could not be located');
-        if ($name == '.' || $name == '..') throw new DAV\Exception\Forbidden('Permission denied to . and ..');
+    public function getChild($name)
+    {
+        $path = $this->path.'/'.$name;
 
+        if (!file_exists($path)) {
+            throw new DAV\Exception\NotFound('File could not be located');
+        }
+        if ('.' == $name || '..' == $name) {
+            throw new DAV\Exception\Forbidden('Permission denied to . and ..');
+        }
         if (is_dir($path)) {
-
             return new self($path);
-
         } else {
-
             return new File($path);
-
         }
-
     }
 
     /**
      * Checks if a child exists.
      *
      * @param string $name
+     *
      * @return bool
      */
-    function childExists($name) {
-
-        if ($name == '.' || $name == '..')
+    public function childExists($name)
+    {
+        if ('.' == $name || '..' == $name) {
             throw new DAV\Exception\Forbidden('Permission denied to . and ..');
+        }
+        $path = $this->path.'/'.$name;
 
-        $path = $this->path . '/' . $name;
         return file_exists($path);
-
     }
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return DAV\INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         $nodes = [];
         $iterator = new \FilesystemIterator(
             $this->path,
@@ -130,44 +135,43 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTa
         );
 
         foreach ($iterator as $entry) {
-
             $nodes[] = $this->getChild($entry->getFilename());
-
         }
-        return $nodes;
 
+        return $nodes;
     }
 
     /**
-     * Deletes all files in this directory, and then itself
+     * Deletes all files in this directory, and then itself.
      *
      * @return bool
      */
-    function delete() {
-
+    public function delete()
+    {
         // Deleting all children
-        foreach ($this->getChildren() as $child) $child->delete();
+        foreach ($this->getChildren() as $child) {
+            $child->delete();
+        }
 
         // Removing the directory itself
         rmdir($this->path);
 
         return true;
-
     }
 
     /**
-     * Returns available diskspace information
+     * Returns available diskspace information.
      *
      * @return array
      */
-    function getQuotaInfo() {
-
+    public function getQuotaInfo()
+    {
         $total = disk_total_space(realpath($this->path));
         $free = disk_free_space(realpath($this->path));
 
         return [
             $total - $free,
-            $free
+            $free,
         ];
     }
 
@@ -186,13 +190,14 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTa
      * the move itself. If you return true from this function, the assumption
      * is that the move was successful.
      *
-     * @param string $targetName New local file/collection name.
-     * @param string $sourcePath Full path to source node
+     * @param string    $targetName new local file/collection name
+     * @param string    $sourcePath Full path to source node
      * @param DAV\INode $sourceNode Source node itself
+     *
      * @return bool
      */
-    function moveInto($targetName, $sourcePath, DAV\INode $sourceNode) {
-
+    public function moveInto($targetName, $sourcePath, DAV\INode $sourceNode)
+    {
         // We only support FSExt\Directory or FSExt\File objects, so
         // anything else we want to quickly reject.
         if (!$sourceNode instanceof self && !$sourceNode instanceof File) {
@@ -200,12 +205,8 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTa
         }
 
         // PHP allows us to access protected properties from other objects, as
-        // long as they are defined in a class that has a shared inheritence
+        // long as they are defined in a class that has a shared inheritance
         // with the current class.
-        rename($sourceNode->path, $this->path . '/' . $targetName);
-
-        return true;
-
+        return rename($sourceNode->path, $this->path.'/'.$targetName);
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/FSExt/File.php b/vendor/sabre/dav/lib/DAV/FSExt/File.php
index eb5ae19fe..060ef5a48 100644
--- a/vendor/sabre/dav/lib/DAV/FSExt/File.php
+++ b/vendor/sabre/dav/lib/DAV/FSExt/File.php
@@ -1,33 +1,36 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\FSExt;
 
 use Sabre\DAV;
 use Sabre\DAV\FS\Node;
 
 /**
- * File class
+ * File class.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class File extends Node implements DAV\PartialUpdate\IPatchSupport {
-
+class File extends Node implements DAV\PartialUpdate\IPatchSupport
+{
     /**
-     * Updates the data
+     * Updates the data.
      *
      * Data is a readable stream resource.
      *
      * @param resource|string $data
+     *
      * @return string
      */
-    function put($data) {
-
+    public function put($data)
+    {
         file_put_contents($this->path, $data);
         clearstatcache(true, $this->path);
-        return $this->getETag();
 
+        return $this->getETag();
     }
 
     /**
@@ -53,21 +56,22 @@ class File extends Node implements DAV\PartialUpdate\IPatchSupport {
      * time.
      *
      * @param resource|string $data
-     * @param int $rangeType
-     * @param int $offset
+     * @param int             $rangeType
+     * @param int             $offset
+     *
      * @return string|null
      */
-    function patch($data, $rangeType, $offset = null) {
-
+    public function patch($data, $rangeType, $offset = null)
+    {
         switch ($rangeType) {
-            case 1 :
+            case 1:
                 $f = fopen($this->path, 'a');
                 break;
-            case 2 :
+            case 2:
                 $f = fopen($this->path, 'c');
                 fseek($f, $offset);
                 break;
-            case 3 :
+            case 3:
                 $f = fopen($this->path, 'c');
                 fseek($f, $offset, SEEK_END);
                 break;
@@ -79,34 +83,32 @@ class File extends Node implements DAV\PartialUpdate\IPatchSupport {
         }
         fclose($f);
         clearstatcache(true, $this->path);
-        return $this->getETag();
 
+        return $this->getETag();
     }
 
     /**
-     * Returns the data
+     * Returns the data.
      *
      * @return resource
      */
-    function get() {
-
+    public function get()
+    {
         return fopen($this->path, 'r');
-
     }
 
     /**
-     * Delete the current file
+     * Delete the current file.
      *
      * @return bool
      */
-    function delete() {
-
+    public function delete()
+    {
         return unlink($this->path);
-
     }
 
     /**
-     * Returns the ETag for a file
+     * Returns the ETag for a file.
      *
      * An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
      * The ETag is an arbitrary string, but MUST be surrounded by double-quotes.
@@ -115,38 +117,34 @@ class File extends Node implements DAV\PartialUpdate\IPatchSupport {
      *
      * @return string|null
      */
-    function getETag() {
-
-        return '"' . sha1(
-            fileinode($this->path) .
-            filesize($this->path) .
+    public function getETag()
+    {
+        return '"'.sha1(
+            fileinode($this->path).
+            filesize($this->path).
             filemtime($this->path)
-        ) . '"';
-
+        ).'"';
     }
 
     /**
-     * Returns the mime-type for a file
+     * Returns the mime-type for a file.
      *
      * If null is returned, we'll assume application/octet-stream
      *
      * @return string|null
      */
-    function getContentType() {
-
+    public function getContentType()
+    {
         return null;
-
     }
 
     /**
-     * Returns the size of the file, in bytes
+     * Returns the size of the file, in bytes.
      *
      * @return int
      */
-    function getSize() {
-
+    public function getSize()
+    {
         return filesize($this->path);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/File.php b/vendor/sabre/dav/lib/DAV/File.php
index 5161fbd51..daf83aa4d 100644
--- a/vendor/sabre/dav/lib/DAV/File.php
+++ b/vendor/sabre/dav/lib/DAV/File.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * File class
+ * File class.
  *
  * This is a helper class, that should aid in getting file classes setup.
  * Most of its methods are implemented, and throw permission denied exceptions
@@ -12,8 +14,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class File extends Node implements IFile {
-
+abstract class File extends Node implements IFile
+{
     /**
      * Replaces the contents of the file.
      *
@@ -32,25 +34,24 @@ abstract class File extends Node implements IFile {
      * return an ETag, and just return null.
      *
      * @param string|resource $data
+     *
      * @return string|null
      */
-    function put($data) {
-
+    public function put($data)
+    {
         throw new Exception\Forbidden('Permission denied to change data');
-
     }
 
     /**
-     * Returns the data
+     * Returns the data.
      *
      * This method may either return a string or a readable stream resource
      *
      * @return mixed
      */
-    function get() {
-
+    public function get()
+    {
         throw new Exception\Forbidden('Permission denied to read this file');
-
     }
 
     /**
@@ -58,14 +59,13 @@ abstract class File extends Node implements IFile {
      *
      * @return int
      */
-    function getSize() {
-
+    public function getSize()
+    {
         return 0;
-
     }
 
     /**
-     * Returns the ETag for a file
+     * Returns the ETag for a file.
      *
      * An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
      * The ETag is an arbitrary string, but MUST be surrounded by double-quotes.
@@ -74,23 +74,20 @@ abstract class File extends Node implements IFile {
      *
      * @return string|null
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return null;
-
     }
 
     /**
-     * Returns the mime-type for a file
+     * Returns the mime-type for a file.
      *
      * If null is returned, we'll assume application/octet-stream
      *
      * @return string|null
      */
-    function getContentType() {
-
+    public function getContentType()
+    {
         return null;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/ICollection.php b/vendor/sabre/dav/lib/DAV/ICollection.php
index 7793070d3..c039dae56 100644
--- a/vendor/sabre/dav/lib/DAV/ICollection.php
+++ b/vendor/sabre/dav/lib/DAV/ICollection.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * The ICollection Interface
+ * The ICollection Interface.
  *
  * This interface should be implemented by each class that represents a collection
  *
@@ -11,10 +13,10 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ICollection extends INode {
-
+interface ICollection extends INode
+{
     /**
-     * Creates a new file in the directory
+     * Creates a new file in the directory.
      *
      * Data will either be supplied as a stream resource, or in certain cases
      * as a string. Keep in mind that you may have to support either.
@@ -33,44 +35,45 @@ interface ICollection extends INode {
      * return the same contents of what was submitted here, you are strongly
      * recommended to omit the ETag.
      *
-     * @param string $name Name of the file
+     * @param string          $name Name of the file
      * @param resource|string $data Initial payload
-     * @return null|string
+     *
+     * @return string|null
      */
-    function createFile($name, $data = null);
+    public function createFile($name, $data = null);
 
     /**
-     * Creates a new subdirectory
+     * Creates a new subdirectory.
      *
      * @param string $name
-     * @return void
      */
-    function createDirectory($name);
+    public function createDirectory($name);
 
     /**
-     * Returns a specific child node, referenced by its name
+     * Returns a specific child node, referenced by its name.
      *
      * This method must throw Sabre\DAV\Exception\NotFound if the node does not
      * exist.
      *
      * @param string $name
+     *
      * @return INode
      */
-    function getChild($name);
+    public function getChild($name);
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return INode[]
      */
-    function getChildren();
+    public function getChildren();
 
     /**
-     * Checks if a child-node with the specified name exists
+     * Checks if a child-node with the specified name exists.
      *
      * @param string $name
+     *
      * @return bool
      */
-    function childExists($name);
-
+    public function childExists($name);
 }
diff --git a/vendor/sabre/dav/lib/DAV/ICopyTarget.php b/vendor/sabre/dav/lib/DAV/ICopyTarget.php
new file mode 100644
index 000000000..47227138a
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/ICopyTarget.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\DAV;
+
+/**
+ * By implementing this interface, a collection can effectively say "other
+ * nodes may be copied into this collection".
+ *
+ * If a backend supports a better optimized copy operation, e.g. by avoiding
+ * copying the contents, this can trigger some huge speed gains.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface ICopyTarget extends ICollection
+{
+    /**
+     * Copies a node into this collection.
+     *
+     * It is up to the implementors to:
+     *   1. Create the new resource.
+     *   2. Copy the data and any properties.
+     *
+     * If you return true from this function, the assumption
+     * is that the copy was successful.
+     * If you return false, sabre/dav will handle the copy itself.
+     *
+     * @param string $targetName new local file/collection name
+     * @param string $sourcePath Full path to source node
+     * @param INode  $sourceNode Source node itself
+     *
+     * @return bool
+     */
+    public function copyInto($targetName, $sourcePath, INode $sourceNode);
+}
diff --git a/vendor/sabre/dav/lib/DAV/IExtendedCollection.php b/vendor/sabre/dav/lib/DAV/IExtendedCollection.php
index c561d7072..d43b44bcb 100644
--- a/vendor/sabre/dav/lib/DAV/IExtendedCollection.php
+++ b/vendor/sabre/dav/lib/DAV/IExtendedCollection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
@@ -12,8 +14,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IExtendedCollection extends ICollection {
-
+interface IExtendedCollection extends ICollection
+{
     /**
      * Creates a new collection.
      *
@@ -34,10 +36,9 @@ interface IExtendedCollection extends ICollection {
      * property for you.
      *
      * @param string $name
-     * @param MkCol $mkCol
+     * @param MkCol  $mkCol
+     *
      * @throws Exception\InvalidResourceType
-     * @return void
      */
-    function createExtendedCollection($name, MkCol $mkCol);
-
+    public function createExtendedCollection($name, MkCol $mkCol);
 }
diff --git a/vendor/sabre/dav/lib/DAV/IFile.php b/vendor/sabre/dav/lib/DAV/IFile.php
index 19d8d8637..974aee00d 100644
--- a/vendor/sabre/dav/lib/DAV/IFile.php
+++ b/vendor/sabre/dav/lib/DAV/IFile.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * This interface represents a file in the directory tree
+ * This interface represents a file in the directory tree.
  *
  * A file is a bit of a broad definition. In general it implies that on
  * this specific node a PUT or GET method may be performed, to either update,
@@ -13,8 +15,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IFile extends INode {
-
+interface IFile extends INode
+{
     /**
      * Replaces the contents of the file.
      *
@@ -33,30 +35,31 @@ interface IFile extends INode {
      * return an ETag, and just return null.
      *
      * @param resource|string $data
+     *
      * @return string|null
      */
-    function put($data);
+    public function put($data);
 
     /**
-     * Returns the data
+     * Returns the data.
      *
      * This method may either return a string or a readable stream resource
      *
      * @return mixed
      */
-    function get();
+    public function get();
 
     /**
-     * Returns the mime-type for a file
+     * Returns the mime-type for a file.
      *
      * If null is returned, we'll assume application/octet-stream
      *
      * @return string|null
      */
-    function getContentType();
+    public function getContentType();
 
     /**
-     * Returns the ETag for a file
+     * Returns the ETag for a file.
      *
      * An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
      *
@@ -69,13 +72,12 @@ interface IFile extends INode {
      *
      * @return string|null
      */
-    function getETag();
+    public function getETag();
 
     /**
-     * Returns the size of the node, in bytes
+     * Returns the size of the node, in bytes.
      *
      * @return int
      */
-    function getSize();
-
+    public function getSize();
 }
diff --git a/vendor/sabre/dav/lib/DAV/IMoveTarget.php b/vendor/sabre/dav/lib/DAV/IMoveTarget.php
index 92fde1d5c..18a24081e 100644
--- a/vendor/sabre/dav/lib/DAV/IMoveTarget.php
+++ b/vendor/sabre/dav/lib/DAV/IMoveTarget.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
@@ -17,8 +19,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IMoveTarget extends ICollection {
-
+interface IMoveTarget extends ICollection
+{
     /**
      * Moves a node into this collection.
      *
@@ -34,11 +36,11 @@ interface IMoveTarget extends ICollection {
      * the move itself. If you return true from this function, the assumption
      * is that the move was successful.
      *
-     * @param string $targetName New local file/collection name.
+     * @param string $targetName new local file/collection name
      * @param string $sourcePath Full path to source node
-     * @param INode $sourceNode Source node itself
+     * @param INode  $sourceNode Source node itself
+     *
      * @return bool
      */
-    function moveInto($targetName, $sourcePath, INode $sourceNode);
-
+    public function moveInto($targetName, $sourcePath, INode $sourceNode);
 }
diff --git a/vendor/sabre/dav/lib/DAV/IMultiGet.php b/vendor/sabre/dav/lib/DAV/IMultiGet.php
index e26b457ef..445e761eb 100644
--- a/vendor/sabre/dav/lib/DAV/IMultiGet.php
+++ b/vendor/sabre/dav/lib/DAV/IMultiGet.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * IMultiGet
+ * IMultiGet.
  *
  * This interface adds a tiny bit of functionality to collections.
  *
@@ -20,8 +22,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IMultiGet extends ICollection {
-
+interface IMultiGet extends ICollection
+{
     /**
      * This method receives a list of paths in it's first argument.
      * It must return an array with Node objects.
@@ -29,8 +31,8 @@ interface IMultiGet extends ICollection {
      * If any children are not found, you do not have to return them.
      *
      * @param string[] $paths
+     *
      * @return array
      */
-    function getMultipleChildren(array $paths);
-
+    public function getMultipleChildren(array $paths);
 }
diff --git a/vendor/sabre/dav/lib/DAV/INode.php b/vendor/sabre/dav/lib/DAV/INode.php
index bb884934d..f3e7e395b 100644
--- a/vendor/sabre/dav/lib/DAV/INode.php
+++ b/vendor/sabre/dav/lib/DAV/INode.php
@@ -1,22 +1,22 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * The INode interface is the base interface, and the parent class of both ICollection and IFile
+ * The INode interface is the base interface, and the parent class of both ICollection and IFile.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface INode {
-
+interface INode
+{
     /**
-     * Deleted the current node
-     *
-     * @return void
+     * Deleted the current node.
      */
-    function delete();
+    public function delete();
 
     /**
      * Returns the name of the node.
@@ -25,15 +25,14 @@ interface INode {
      *
      * @return string
      */
-    function getName();
+    public function getName();
 
     /**
-     * Renames the node
+     * Renames the node.
      *
      * @param string $name The new name
-     * @return void
      */
-    function setName($name);
+    public function setName($name);
 
     /**
      * Returns the last modification time, as a unix timestamp. Return null
@@ -41,6 +40,5 @@ interface INode {
      *
      * @return int|null
      */
-    function getLastModified();
-
+    public function getLastModified();
 }
diff --git a/vendor/sabre/dav/lib/DAV/IProperties.php b/vendor/sabre/dav/lib/DAV/IProperties.php
index 00969c2c4..d50fdff20 100644
--- a/vendor/sabre/dav/lib/DAV/IProperties.php
+++ b/vendor/sabre/dav/lib/DAV/IProperties.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * IProperties interface
+ * IProperties interface.
  *
  * Implement this interface to support custom WebDAV properties requested and sent from clients.
  *
@@ -11,8 +13,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IProperties extends INode {
-
+interface IProperties extends INode
+{
     /**
      * Updates properties on this node.
      *
@@ -23,9 +25,8 @@ interface IProperties extends INode {
      * Read the PropPatch documentation for more information.
      *
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch(PropPatch $propPatch);
+    public function propPatch(PropPatch $propPatch);
 
     /**
      * Returns a list of properties for this nodes.
@@ -40,8 +41,8 @@ interface IProperties extends INode {
      * The Server class will filter out the extra.
      *
      * @param array $properties
+     *
      * @return array
      */
-    function getProperties($properties);
-
+    public function getProperties($properties);
 }
diff --git a/vendor/sabre/dav/lib/DAV/IQuota.php b/vendor/sabre/dav/lib/DAV/IQuota.php
index e16f386b9..7d72e1174 100644
--- a/vendor/sabre/dav/lib/DAV/IQuota.php
+++ b/vendor/sabre/dav/lib/DAV/IQuota.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * IQuota interface
+ * IQuota interface.
  *
  * Implement this interface to add the ability to return quota information. The ObjectTree
  * will check for quota information on any given node. If the information is not available it will
@@ -13,14 +15,13 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IQuota extends ICollection {
-
+interface IQuota extends ICollection
+{
     /**
-     * Returns the quota information
+     * Returns the quota information.
      *
      * This method MUST return an array with 2 values, the first being the total used space,
      * the second the available space (in bytes)
      */
-    function getQuotaInfo();
-
+    public function getQuotaInfo();
 }
diff --git a/vendor/sabre/dav/lib/DAV/Locks/Backend/AbstractBackend.php b/vendor/sabre/dav/lib/DAV/Locks/Backend/AbstractBackend.php
index 044316cdb..a1bf48699 100644
--- a/vendor/sabre/dav/lib/DAV/Locks/Backend/AbstractBackend.php
+++ b/vendor/sabre/dav/lib/DAV/Locks/Backend/AbstractBackend.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks\Backend;
 
 /**
@@ -13,6 +15,6 @@ namespace Sabre\DAV\Locks\Backend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractBackend implements BackendInterface {
-
+abstract class AbstractBackend implements BackendInterface
+{
 }
diff --git a/vendor/sabre/dav/lib/DAV/Locks/Backend/BackendInterface.php b/vendor/sabre/dav/lib/DAV/Locks/Backend/BackendInterface.php
index a2d2fe89c..9a6919f50 100644
--- a/vendor/sabre/dav/lib/DAV/Locks/Backend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/DAV/Locks/Backend/BackendInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks\Backend;
 
 use Sabre\DAV\Locks;
@@ -12,10 +14,10 @@ use Sabre\DAV\Locks;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface BackendInterface {
-
+interface BackendInterface
+{
     /**
-     * Returns a list of Sabre\DAV\Locks\LockInfo objects
+     * Returns a list of Sabre\DAV\Locks\LockInfo objects.
      *
      * This method should return all the locks for a particular uri, including
      * locks that might be set on a parent uri.
@@ -24,27 +26,29 @@ interface BackendInterface {
      * any locks in the subtree of the uri for locks.
      *
      * @param string $uri
-     * @param bool $returnChildLocks
+     * @param bool   $returnChildLocks
+     *
      * @return array
      */
-    function getLocks($uri, $returnChildLocks);
+    public function getLocks($uri, $returnChildLocks);
 
     /**
-     * Locks a uri
+     * Locks a uri.
      *
-     * @param string $uri
+     * @param string         $uri
      * @param Locks\LockInfo $lockInfo
+     *
      * @return bool
      */
-    function lock($uri, Locks\LockInfo $lockInfo);
+    public function lock($uri, Locks\LockInfo $lockInfo);
 
     /**
-     * Removes a lock from a uri
+     * Removes a lock from a uri.
      *
-     * @param string $uri
+     * @param string         $uri
      * @param Locks\LockInfo $lockInfo
+     *
      * @return bool
      */
-    function unlock($uri, Locks\LockInfo $lockInfo);
-
+    public function unlock($uri, Locks\LockInfo $lockInfo);
 }
diff --git a/vendor/sabre/dav/lib/DAV/Locks/Backend/File.php b/vendor/sabre/dav/lib/DAV/Locks/Backend/File.php
index 849539bee..5957f35dd 100644
--- a/vendor/sabre/dav/lib/DAV/Locks/Backend/File.php
+++ b/vendor/sabre/dav/lib/DAV/Locks/Backend/File.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks\Backend;
 
 use Sabre\DAV\Locks\LockInfo;
@@ -17,28 +19,27 @@ use Sabre\DAV\Locks\LockInfo;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class File extends AbstractBackend {
-
+class File extends AbstractBackend
+{
     /**
-     * The storage file
+     * The storage file.
      *
      * @var string
      */
     private $locksFile;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param string $locksFile path to file
      */
-    function __construct($locksFile) {
-
+    public function __construct($locksFile)
+    {
         $this->locksFile = $locksFile;
-
     }
 
     /**
-     * Returns a list of Sabre\DAV\Locks\LockInfo objects
+     * Returns a list of Sabre\DAV\Locks\LockInfo objects.
      *
      * This method should return all the locks for a particular uri, including
      * locks that might be set on a parent uri.
@@ -47,47 +48,47 @@ class File extends AbstractBackend {
      * any locks in the subtree of the uri for locks.
      *
      * @param string $uri
-     * @param bool $returnChildLocks
+     * @param bool   $returnChildLocks
+     *
      * @return array
      */
-    function getLocks($uri, $returnChildLocks) {
-
+    public function getLocks($uri, $returnChildLocks)
+    {
         $newLocks = [];
 
         $locks = $this->getData();
 
         foreach ($locks as $lock) {
-
             if ($lock->uri === $uri ||
                 //deep locks on parents
-                ($lock->depth != 0 && strpos($uri, $lock->uri . '/') === 0) ||
+                (0 != $lock->depth && 0 === strpos($uri, $lock->uri.'/')) ||
 
                 // locks on children
-                ($returnChildLocks && (strpos($lock->uri, $uri . '/') === 0))) {
-
+                ($returnChildLocks && (0 === strpos($lock->uri, $uri.'/')))) {
                 $newLocks[] = $lock;
-
             }
-
         }
 
         // Checking if we can remove any of these locks
         foreach ($newLocks as $k => $lock) {
-            if (time() > $lock->timeout + $lock->created) unset($newLocks[$k]);
+            if (time() > $lock->timeout + $lock->created) {
+                unset($newLocks[$k]);
+            }
         }
-        return $newLocks;
 
+        return $newLocks;
     }
 
     /**
-     * Locks a uri
+     * Locks a uri.
      *
-     * @param string $uri
+     * @param string   $uri
      * @param LockInfo $lockInfo
+     *
      * @return bool
      */
-    function lock($uri, LockInfo $lockInfo) {
-
+    public function lock($uri, LockInfo $lockInfo)
+    {
         // We're making the lock timeout 30 minutes
         $lockInfo->timeout = 1800;
         $lockInfo->created = time();
@@ -105,32 +106,31 @@ class File extends AbstractBackend {
         }
         $locks[] = $lockInfo;
         $this->putData($locks);
-        return true;
 
+        return true;
     }
 
     /**
-     * Removes a lock from a uri
+     * Removes a lock from a uri.
      *
-     * @param string $uri
+     * @param string   $uri
      * @param LockInfo $lockInfo
+     *
      * @return bool
      */
-    function unlock($uri, LockInfo $lockInfo) {
-
+    public function unlock($uri, LockInfo $lockInfo)
+    {
         $locks = $this->getData();
         foreach ($locks as $k => $lock) {
-
             if ($lock->token == $lockInfo->token) {
-
                 unset($locks[$k]);
                 $this->putData($locks);
-                return true;
 
+                return true;
             }
         }
-        return false;
 
+        return false;
     }
 
     /**
@@ -138,9 +138,11 @@ class File extends AbstractBackend {
      *
      * @return array
      */
-    protected function getData() {
-
-        if (!file_exists($this->locksFile)) return [];
+    protected function getData()
+    {
+        if (!file_exists($this->locksFile)) {
+            return [];
+        }
 
         // opening up the file, and creating a shared lock
         $handle = fopen($this->locksFile, 'r');
@@ -155,19 +157,20 @@ class File extends AbstractBackend {
 
         // Unserializing and checking if the resource file contains data for this file
         $data = unserialize($data);
-        if (!$data) return [];
-        return $data;
+        if (!$data) {
+            return [];
+        }
 
+        return $data;
     }
 
     /**
-     * Saves the lockdata
+     * Saves the lockdata.
      *
      * @param array $newData
-     * @return void
      */
-    protected function putData(array $newData) {
-
+    protected function putData(array $newData)
+    {
         // opening up the file, and creating an exclusive lock
         $handle = fopen($this->locksFile, 'a+');
         flock($handle, LOCK_EX);
@@ -179,7 +182,5 @@ class File extends AbstractBackend {
         fwrite($handle, serialize($newData));
         flock($handle, LOCK_UN);
         fclose($handle);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Locks/Backend/PDO.php b/vendor/sabre/dav/lib/DAV/Locks/Backend/PDO.php
index 510f266f7..36a12d1ab 100644
--- a/vendor/sabre/dav/lib/DAV/Locks/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/DAV/Locks/Backend/PDO.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks\Backend;
 
 use Sabre\DAV\Locks\LockInfo;
@@ -14,8 +16,8 @@ use Sabre\DAV\Locks\LockInfo;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PDO extends AbstractBackend {
-
+class PDO extends AbstractBackend
+{
     /**
      * The PDO tablename this backend uses.
      *
@@ -24,25 +26,24 @@ class PDO extends AbstractBackend {
     public $tableName = 'locks';
 
     /**
-     * The PDO connection object
+     * The PDO connection object.
      *
      * @var pdo
      */
     protected $pdo;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param \PDO $pdo
      */
-    function __construct(\PDO $pdo) {
-
+    public function __construct(\PDO $pdo)
+    {
         $this->pdo = $pdo;
-
     }
 
     /**
-     * Returns a list of Sabre\DAV\Locks\LockInfo objects
+     * Returns a list of Sabre\DAV\Locks\LockInfo objects.
      *
      * This method should return all the locks for a particular uri, including
      * locks that might be set on a parent uri.
@@ -51,16 +52,17 @@ class PDO extends AbstractBackend {
      * any locks in the subtree of the uri for locks.
      *
      * @param string $uri
-     * @param bool $returnChildLocks
+     * @param bool   $returnChildLocks
+     *
      * @return array
      */
-    function getLocks($uri, $returnChildLocks) {
-
+    public function getLocks($uri, $returnChildLocks)
+    {
         // NOTE: the following 10 lines or so could be easily replaced by
         // pure sql. MySQL's non-standard string concatenation prevents us
         // from doing this though.
-        $query = 'SELECT owner, token, timeout, created, scope, depth, uri FROM ' . $this->tableName . ' WHERE (created > (? - timeout)) AND ((uri = ?)';
-        $params = [time(),$uri];
+        $query = 'SELECT owner, token, timeout, created, scope, depth, uri FROM '.$this->tableName.' WHERE (created > (? - timeout)) AND ((uri = ?)';
+        $params = [time(), $uri];
 
         // We need to check locks for every part in the uri.
         $uriParts = explode('/', $uri);
@@ -71,20 +73,18 @@ class PDO extends AbstractBackend {
         $currentPath = '';
 
         foreach ($uriParts as $part) {
-
-            if ($currentPath) $currentPath .= '/';
+            if ($currentPath) {
+                $currentPath .= '/';
+            }
             $currentPath .= $part;
 
             $query .= ' OR (depth!=0 AND uri = ?)';
             $params[] = $currentPath;
-
         }
 
         if ($returnChildLocks) {
-
             $query .= ' OR (uri LIKE ?)';
-            $params[] = $uri . '/%';
-
+            $params[] = $uri.'/%';
         }
         $query .= ')';
 
@@ -94,7 +94,6 @@ class PDO extends AbstractBackend {
 
         $lockList = [];
         foreach ($result as $row) {
-
             $lockInfo = new LockInfo();
             $lockInfo->owner = $row['owner'];
             $lockInfo->token = $row['token'];
@@ -104,22 +103,21 @@ class PDO extends AbstractBackend {
             $lockInfo->depth = $row['depth'];
             $lockInfo->uri = $row['uri'];
             $lockList[] = $lockInfo;
-
         }
 
         return $lockList;
-
     }
 
     /**
-     * Locks a uri
+     * Locks a uri.
      *
-     * @param string $uri
+     * @param string   $uri
      * @param LockInfo $lockInfo
+     *
      * @return bool
      */
-    function lock($uri, LockInfo $lockInfo) {
-
+    public function lock($uri, LockInfo $lockInfo)
+    {
         // We're making the lock timeout 30 minutes
         $lockInfo->timeout = 30 * 60;
         $lockInfo->created = time();
@@ -128,11 +126,13 @@ class PDO extends AbstractBackend {
         $locks = $this->getLocks($uri, false);
         $exists = false;
         foreach ($locks as $lock) {
-            if ($lock->token == $lockInfo->token) $exists = true;
+            if ($lock->token == $lockInfo->token) {
+                $exists = true;
+            }
         }
 
         if ($exists) {
-            $stmt = $this->pdo->prepare('UPDATE ' . $this->tableName . ' SET owner = ?, timeout = ?, scope = ?, depth = ?, uri = ?, created = ? WHERE token = ?');
+            $stmt = $this->pdo->prepare('UPDATE '.$this->tableName.' SET owner = ?, timeout = ?, scope = ?, depth = ?, uri = ?, created = ? WHERE token = ?');
             $stmt->execute([
                 $lockInfo->owner,
                 $lockInfo->timeout,
@@ -140,10 +140,10 @@ class PDO extends AbstractBackend {
                 $lockInfo->depth,
                 $uri,
                 $lockInfo->created,
-                $lockInfo->token
+                $lockInfo->token,
             ]);
         } else {
-            $stmt = $this->pdo->prepare('INSERT INTO ' . $this->tableName . ' (owner,timeout,scope,depth,uri,created,token) VALUES (?,?,?,?,?,?,?)');
+            $stmt = $this->pdo->prepare('INSERT INTO '.$this->tableName.' (owner,timeout,scope,depth,uri,created,token) VALUES (?,?,?,?,?,?,?)');
             $stmt->execute([
                 $lockInfo->owner,
                 $lockInfo->timeout,
@@ -151,30 +151,26 @@ class PDO extends AbstractBackend {
                 $lockInfo->depth,
                 $uri,
                 $lockInfo->created,
-                $lockInfo->token
+                $lockInfo->token,
             ]);
         }
 
         return true;
-
     }
 
-
-
     /**
-     * Removes a lock from a uri
+     * Removes a lock from a uri.
      *
-     * @param string $uri
+     * @param string   $uri
      * @param LockInfo $lockInfo
+     *
      * @return bool
      */
-    function unlock($uri, LockInfo $lockInfo) {
-
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->tableName . ' WHERE uri = ? AND token = ?');
+    public function unlock($uri, LockInfo $lockInfo)
+    {
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->tableName.' WHERE uri = ? AND token = ?');
         $stmt->execute([$uri, $lockInfo->token]);
 
-        return $stmt->rowCount() === 1;
-
+        return 1 === $stmt->rowCount();
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Locks/LockInfo.php b/vendor/sabre/dav/lib/DAV/Locks/LockInfo.php
index 2c8cca0fe..df8227566 100644
--- a/vendor/sabre/dav/lib/DAV/Locks/LockInfo.php
+++ b/vendor/sabre/dav/lib/DAV/Locks/LockInfo.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks;
 
 /**
- * LockInfo class
+ * LockInfo class.
  *
  * An object of the LockInfo class holds all the information relevant to a
  * single lock.
@@ -12,69 +14,69 @@ namespace Sabre\DAV\Locks;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class LockInfo {
-
+class LockInfo
+{
     /**
-     * A shared lock
+     * A shared lock.
      */
     const SHARED = 1;
 
     /**
-     * An exclusive lock
+     * An exclusive lock.
      */
     const EXCLUSIVE = 2;
 
     /**
-     * A never expiring timeout
+     * A never expiring timeout.
      */
     const TIMEOUT_INFINITE = -1;
 
     /**
-     * The owner of the lock
+     * The owner of the lock.
      *
      * @var string
      */
     public $owner;
 
     /**
-     * The locktoken
+     * The locktoken.
      *
      * @var string
      */
     public $token;
 
     /**
-     * How long till the lock is expiring
+     * How long till the lock is expiring.
      *
      * @var int
      */
     public $timeout;
 
     /**
-     * UNIX Timestamp of when this lock was created
+     * UNIX Timestamp of when this lock was created.
      *
      * @var int
      */
     public $created;
 
     /**
-     * Exclusive or shared lock
+     * Exclusive or shared lock.
      *
      * @var int
      */
     public $scope = self::EXCLUSIVE;
 
     /**
-     * Depth of lock, can be 0 or Sabre\DAV\Server::DEPTH_INFINITY
+     * Depth of lock, can be 0 or Sabre\DAV\Server::DEPTH_INFINITY.
      */
     public $depth = 0;
 
     /**
-     * The uri this lock locks
+     * The uri this lock locks.
      *
      * TODO: This value is not always set
+     *
      * @var mixed
      */
     public $uri;
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Locks/Plugin.php b/vendor/sabre/dav/lib/DAV/Locks/Plugin.php
index 41a3bf3fa..6d3e9b883 100644
--- a/vendor/sabre/dav/lib/DAV/Locks/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Locks/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks;
 
 use Sabre\DAV;
@@ -7,7 +9,7 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * Locking plugin
+ * Locking plugin.
  *
  * This plugin provides locking support to a WebDAV server.
  * The easiest way to get started, is by hooking it up as such:
@@ -20,53 +22,50 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     /**
-     * locksBackend
+     * locksBackend.
      *
      * @var Backend\BackendInterface
      */
     protected $locksBackend;
 
     /**
-     * server
+     * server.
      *
      * @var DAV\Server
      */
     protected $server;
 
     /**
-     * __construct
+     * __construct.
      *
      * @param Backend\BackendInterface $locksBackend
      */
-    function __construct(Backend\BackendInterface $locksBackend) {
-
+    public function __construct(Backend\BackendInterface $locksBackend)
+    {
         $this->locksBackend = $locksBackend;
-
     }
 
     /**
-     * Initializes the plugin
+     * Initializes the plugin.
      *
      * This method is automatically called by the Server class after addPlugin.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
 
         $this->server->xml->elementMap['{DAV:}lockinfo'] = 'Sabre\\DAV\\Xml\\Request\\Lock';
 
-        $server->on('method:LOCK',    [$this, 'httpLock']);
-        $server->on('method:UNLOCK',  [$this, 'httpUnlock']);
+        $server->on('method:LOCK', [$this, 'httpLock']);
+        $server->on('method:UNLOCK', [$this, 'httpUnlock']);
         $server->on('validateTokens', [$this, 'validateTokens']);
-        $server->on('propFind',       [$this, 'propFind']);
-        $server->on('afterUnbind',    [$this, 'afterUnbind']);
-
+        $server->on('propFind', [$this, 'propFind']);
+        $server->on('afterUnbind', [$this, 'afterUnbind']);
     }
 
     /**
@@ -77,31 +76,28 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'locks';
-
     }
 
     /**
      * This method is called after most properties have been found
-     * it allows us to add in any Lock-related properties
+     * it allows us to add in any Lock-related properties.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
-     * @return void
+     * @param DAV\INode    $node
      */
-    function propFind(DAV\PropFind $propFind, DAV\INode $node) {
-
-        $propFind->handle('{DAV:}supportedlock', function() {
+    public function propFind(DAV\PropFind $propFind, DAV\INode $node)
+    {
+        $propFind->handle('{DAV:}supportedlock', function () {
             return new DAV\Xml\Property\SupportedLock();
         });
-        $propFind->handle('{DAV:}lockdiscovery', function() use ($propFind) {
+        $propFind->handle('{DAV:}lockdiscovery', function () use ($propFind) {
             return new DAV\Xml\Property\LockDiscovery(
                 $this->getLocks($propFind->getPath())
             );
         });
-
     }
 
     /**
@@ -112,12 +108,12 @@ class Plugin extends DAV\ServerPlugin {
      * available for the specified uri.
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getHTTPMethods($uri) {
-
-        return ['LOCK','UNLOCK'];
-
+    public function getHTTPMethods($uri)
+    {
+        return ['LOCK', 'UNLOCK'];
     }
 
     /**
@@ -128,14 +124,13 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return [2];
-
     }
 
     /**
-     * Returns all lock information on a particular uri
+     * Returns all lock information on a particular uri.
      *
      * This function should return an array with Sabre\DAV\Locks\LockInfo objects. If there are no locks on a file, return an empty array.
      *
@@ -144,17 +139,17 @@ class Plugin extends DAV\ServerPlugin {
      * for any possible locks and return those as well.
      *
      * @param string $uri
-     * @param bool $returnChildLocks
+     * @param bool   $returnChildLocks
+     *
      * @return array
      */
-    function getLocks($uri, $returnChildLocks = false) {
-
+    public function getLocks($uri, $returnChildLocks = false)
+    {
         return $this->locksBackend->getLocks($uri, $returnChildLocks);
-
     }
 
     /**
-     * Locks an uri
+     * Locks an uri.
      *
      * The WebDAV lock request can be operated to either create a new lock on a file, or to refresh an existing lock
      * If a new lock is created, a full XML body should be supplied, containing information about the lock such as the type
@@ -164,12 +159,13 @@ class Plugin extends DAV\ServerPlugin {
      *
      * Additionally, a lock can be requested for a non-existent file. In these case we're obligated to create an empty file as per RFC4918:S7.3
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpLock(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpLock(RequestInterface $request, ResponseInterface $response)
+    {
         $uri = $request->getPath();
 
         $existingLocks = $this->getLocks($uri);
@@ -180,7 +176,7 @@ class Plugin extends DAV\ServerPlugin {
             $existingLock = null;
             // Checking if there's already non-shared locks on the uri.
             foreach ($existingLocks as $existingLock) {
-                if ($existingLock->scope === LockInfo::EXCLUSIVE) {
+                if (LockInfo::EXCLUSIVE === $existingLock->scope) {
                     throw new DAV\Exception\ConflictingLock($existingLock);
                 }
             }
@@ -188,11 +184,10 @@ class Plugin extends DAV\ServerPlugin {
             $lockInfo = $this->parseLockRequest($body);
             $lockInfo->depth = $this->server->getHTTPDepth();
             $lockInfo->uri = $uri;
-            if ($existingLock && $lockInfo->scope != LockInfo::SHARED)
+            if ($existingLock && LockInfo::SHARED != $lockInfo->scope) {
                 throw new DAV\Exception\ConflictingLock($existingLock);
-
+            }
         } else {
-
             // Gonna check if this was a lock refresh.
             $existingLocks = $this->getLocks($uri);
             $conditions = $this->server->getIfConditions($request);
@@ -201,7 +196,7 @@ class Plugin extends DAV\ServerPlugin {
             foreach ($existingLocks as $existingLock) {
                 foreach ($conditions as $condition) {
                     foreach ($condition['tokens'] as $token) {
-                        if ($token['token'] === 'opaquelocktoken:' . $existingLock->token) {
+                        if ($token['token'] === 'opaquelocktoken:'.$existingLock->token) {
                             $found = $existingLock;
                             break 3;
                         }
@@ -216,18 +211,20 @@ class Plugin extends DAV\ServerPlugin {
                 } else {
                     throw new DAV\Exception\BadRequest('An xml body is required for lock requests');
                 }
-
             }
 
             // This must have been a lock refresh
             $lockInfo = $found;
 
             // The resource could have been locked through another uri.
-            if ($uri != $lockInfo->uri) $uri = $lockInfo->uri;
-
+            if ($uri != $lockInfo->uri) {
+                $uri = $lockInfo->uri;
+            }
         }
 
-        if ($timeout = $this->getTimeoutHeader()) $lockInfo->timeout = $timeout;
+        if ($timeout = $this->getTimeoutHeader()) {
+            $lockInfo->timeout = $timeout;
+        }
 
         $newFile = false;
 
@@ -240,56 +237,52 @@ class Plugin extends DAV\ServerPlugin {
             //
             // See Issue 222
             // $this->server->emit('beforeWriteContent',array($uri));
-
         } catch (DAV\Exception\NotFound $e) {
-
             // It didn't, lets create it
             $this->server->createFile($uri, fopen('php://memory', 'r'));
             $newFile = true;
-
         }
 
         $this->lockNode($uri, $lockInfo);
 
         $response->setHeader('Content-Type', 'application/xml; charset=utf-8');
-        $response->setHeader('Lock-Token', '<opaquelocktoken:' . $lockInfo->token . '>');
+        $response->setHeader('Lock-Token', '<opaquelocktoken:'.$lockInfo->token.'>');
         $response->setStatus($newFile ? 201 : 200);
         $response->setBody($this->generateLockResponse($lockInfo));
 
         // Returning false will interrupt the event chain and mark this method
         // as 'handled'.
         return false;
-
     }
 
     /**
-     * Unlocks a uri
+     * Unlocks a uri.
      *
      * This WebDAV method allows you to remove a lock from a node. The client should provide a valid locktoken through the Lock-token http header
      * The server should return 204 (No content) on success
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function httpUnlock(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpUnlock(RequestInterface $request, ResponseInterface $response)
+    {
         $lockToken = $request->getHeader('Lock-Token');
 
         // If the locktoken header is not supplied, we need to throw a bad request exception
-        if (!$lockToken) throw new DAV\Exception\BadRequest('No lock token was supplied');
-
+        if (!$lockToken) {
+            throw new DAV\Exception\BadRequest('No lock token was supplied');
+        }
         $path = $request->getPath();
         $locks = $this->getLocks($path);
 
         // Windows sometimes forgets to include < and > in the Lock-Token
         // header
-        if ($lockToken[0] !== '<') $lockToken = '<' . $lockToken . '>';
+        if ('<' !== $lockToken[0]) {
+            $lockToken = '<'.$lockToken.'>';
+        }
 
         foreach ($locks as $lock) {
-
-            if ('<opaquelocktoken:' . $lock->token . '>' == $lockToken) {
-
+            if ('<opaquelocktoken:'.$lock->token.'>' == $lockToken) {
                 $this->unlockNode($path, $lock);
                 $response->setHeader('Content-Length', '0');
                 $response->setStatus(204);
@@ -297,14 +290,11 @@ class Plugin extends DAV\ServerPlugin {
                 // Returning false will break the method chain, and mark the
                 // method as 'handled'.
                 return false;
-
             }
-
         }
 
         // If we got here, it means the locktoken was invalid
         throw new DAV\Exception\LockTokenMatchesRequestUri();
-
     }
 
     /**
@@ -313,51 +303,54 @@ class Plugin extends DAV\ServerPlugin {
      * We use this event to clean up any locks that still exist on the node.
      *
      * @param string $path
-     * @return void
      */
-    function afterUnbind($path) {
-
+    public function afterUnbind($path)
+    {
         $locks = $this->getLocks($path, $includeChildren = true);
         foreach ($locks as $lock) {
             $this->unlockNode($path, $lock);
         }
-
     }
 
     /**
-     * Locks a uri
+     * Locks a uri.
      *
      * All the locking information is supplied in the lockInfo object. The object has a suggested timeout, but this can be safely ignored
      * It is important that if the existing timeout is ignored, the property is overwritten, as this needs to be sent back to the client
      *
-     * @param string $uri
+     * @param string   $uri
      * @param LockInfo $lockInfo
+     *
      * @return bool
      */
-    function lockNode($uri, LockInfo $lockInfo) {
+    public function lockNode($uri, LockInfo $lockInfo)
+    {
+        if (!$this->server->emit('beforeLock', [$uri, $lockInfo])) {
+            return;
+        }
 
-        if (!$this->server->emit('beforeLock', [$uri, $lockInfo])) return;
         return $this->locksBackend->lock($uri, $lockInfo);
-
     }
 
     /**
-     * Unlocks a uri
+     * Unlocks a uri.
      *
      * This method removes a lock from a uri. It is assumed all the supplied information is correct and verified
      *
-     * @param string $uri
+     * @param string   $uri
      * @param LockInfo $lockInfo
+     *
      * @return bool
      */
-    function unlockNode($uri, LockInfo $lockInfo) {
+    public function unlockNode($uri, LockInfo $lockInfo)
+    {
+        if (!$this->server->emit('beforeUnlock', [$uri, $lockInfo])) {
+            return;
+        }
 
-        if (!$this->server->emit('beforeUnlock', [$uri, $lockInfo])) return;
         return $this->locksBackend->unlock($uri, $lockInfo);
-
     }
 
-
     /**
      * Returns the contents of the HTTP Timeout header.
      *
@@ -365,37 +358,36 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return int
      */
-    function getTimeoutHeader() {
-
+    public function getTimeoutHeader()
+    {
         $header = $this->server->httpRequest->getHeader('Timeout');
 
         if ($header) {
-
-            if (stripos($header, 'second-') === 0) $header = (int)(substr($header, 7));
-            elseif (stripos($header, 'infinite') === 0) $header = LockInfo::TIMEOUT_INFINITE;
-            else throw new DAV\Exception\BadRequest('Invalid HTTP timeout header');
-
+            if (0 === stripos($header, 'second-')) {
+                $header = (int) (substr($header, 7));
+            } elseif (0 === stripos($header, 'infinite')) {
+                $header = LockInfo::TIMEOUT_INFINITE;
+            } else {
+                throw new DAV\Exception\BadRequest('Invalid HTTP timeout header');
+            }
         } else {
-
             $header = 0;
-
         }
 
         return $header;
-
     }
 
     /**
-     * Generates the response for successful LOCK requests
+     * Generates the response for successful LOCK requests.
      *
      * @param LockInfo $lockInfo
+     *
      * @return string
      */
-    protected function generateLockResponse(LockInfo $lockInfo) {
-
+    protected function generateLockResponse(LockInfo $lockInfo)
+    {
         return $this->server->xml->write('{DAV:}prop', [
-            '{DAV:}lockdiscovery' =>
-                new DAV\Xml\Property\LockDiscovery([$lockInfo])
+            '{DAV:}lockdiscovery' => new DAV\Xml\Property\LockDiscovery([$lockInfo]),
         ]);
     }
 
@@ -410,11 +402,10 @@ class Plugin extends DAV\ServerPlugin {
      * tokens.
      *
      * @param RequestInterface $request
-     * @param mixed $conditions
-     * @return void
+     * @param mixed            $conditions
      */
-    function validateTokens(RequestInterface $request, &$conditions) {
-
+    public function validateTokens(RequestInterface $request, &$conditions)
+    {
         // First we need to gather a list of locks that must be satisfied.
         $mustLocks = [];
         $method = $request->getMethod();
@@ -422,24 +413,23 @@ class Plugin extends DAV\ServerPlugin {
         // Methods not in that list are operations that doesn't alter any
         // resources, and we don't need to check the lock-states for.
         switch ($method) {
-
-            case 'DELETE' :
+            case 'DELETE':
                 $mustLocks = array_merge($mustLocks, $this->getLocks(
                     $request->getPath(),
                     true
                 ));
                 break;
-            case 'MKCOL' :
-            case 'MKCALENDAR' :
-            case 'PROPPATCH' :
-            case 'PUT' :
-            case 'PATCH' :
+            case 'MKCOL':
+            case 'MKCALENDAR':
+            case 'PROPPATCH':
+            case 'PUT':
+            case 'PATCH':
                 $mustLocks = array_merge($mustLocks, $this->getLocks(
                     $request->getPath(),
                     false
                 ));
                 break;
-            case 'MOVE' :
+            case 'MOVE':
                 $mustLocks = array_merge($mustLocks, $this->getLocks(
                     $request->getPath(),
                     true
@@ -449,13 +439,13 @@ class Plugin extends DAV\ServerPlugin {
                     false
                 ));
                 break;
-            case 'COPY' :
+            case 'COPY':
                 $mustLocks = array_merge($mustLocks, $this->getLocks(
                     $this->server->calculateUri($request->getHeader('Destination')),
                     false
                 ));
                 break;
-            case 'LOCK' :
+            case 'LOCK':
                 //Temporary measure.. figure out later why this is needed
                 // Here we basically ignore all incoming tokens...
                 foreach ($conditions as $ii => $condition) {
@@ -463,31 +453,29 @@ class Plugin extends DAV\ServerPlugin {
                         $conditions[$ii]['tokens'][$jj]['validToken'] = true;
                     }
                 }
-                return;
 
+                return;
         }
 
         // It's possible that there's identical locks, because of shared
         // parents. We're removing the duplicates here.
         $tmp = [];
-        foreach ($mustLocks as $lock) $tmp[$lock->token] = $lock;
+        foreach ($mustLocks as $lock) {
+            $tmp[$lock->token] = $lock;
+        }
         $mustLocks = array_values($tmp);
 
         foreach ($conditions as $kk => $condition) {
-
             foreach ($condition['tokens'] as $ii => $token) {
-
                 // Lock tokens always start with opaquelocktoken:
-                if (substr($token['token'], 0, 16) !== 'opaquelocktoken:') {
+                if ('opaquelocktoken:' !== substr($token['token'], 0, 16)) {
                     continue;
                 }
 
                 $checkToken = substr($token['token'], 16);
                 // Looping through our list with locks.
                 foreach ($mustLocks as $jj => $mustLock) {
-
                     if ($mustLock->token == $checkToken) {
-
                         // We have a match!
                         // Removing this one from mustlocks
                         unset($mustLocks[$jj]);
@@ -497,9 +485,7 @@ class Plugin extends DAV\ServerPlugin {
 
                         // Advancing to the next token
                         continue 2;
-
                     }
-
                 }
 
                 // If we got here, it means that there was a
@@ -514,42 +500,34 @@ class Plugin extends DAV\ServerPlugin {
                 // lock-token that was expired.
                 $oddLocks = $this->getLocks($condition['uri']);
                 foreach ($oddLocks as $oddLock) {
-
                     if ($oddLock->token === $checkToken) {
-
                         // We have a hit!
                         $conditions[$kk]['tokens'][$ii]['validToken'] = true;
                         continue 2;
-
                     }
                 }
 
                 // If we get all the way here, the lock-token was
                 // really unknown.
-
-
             }
-
         }
 
         // If there's any locks left in the 'mustLocks' array, it means that
         // the resource was locked and we must block it.
         if ($mustLocks) {
-
             throw new DAV\Exception\Locked(reset($mustLocks));
-
         }
-
     }
 
     /**
-     * Parses a webdav lock xml body, and returns a new Sabre\DAV\Locks\LockInfo object
+     * Parses a webdav lock xml body, and returns a new Sabre\DAV\Locks\LockInfo object.
      *
      * @param string $body
+     *
      * @return LockInfo
      */
-    protected function parseLockRequest($body) {
-
+    protected function parseLockRequest($body)
+    {
         $result = $this->server->xml->expect(
             '{DAV:}lockinfo',
             $body
@@ -562,7 +540,6 @@ class Plugin extends DAV\ServerPlugin {
         $lockInfo->scope = $result->scope;
 
         return $lockInfo;
-
     }
 
     /**
@@ -576,14 +553,12 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'The locks plugin turns this server into a class-2 WebDAV server and adds support for LOCK and UNLOCK',
-            'link'        => 'http://sabre.io/dav/locks/',
+            'link' => 'http://sabre.io/dav/locks/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/MkCol.php b/vendor/sabre/dav/lib/DAV/MkCol.php
index 042e14bca..f3c5ea5c0 100644
--- a/vendor/sabre/dav/lib/DAV/MkCol.php
+++ b/vendor/sabre/dav/lib/DAV/MkCol.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
@@ -20,8 +22,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MkCol extends PropPatch {
-
+class MkCol extends PropPatch
+{
     /**
      * A list of resource-types in clark-notation.
      *
@@ -32,14 +34,13 @@ class MkCol extends PropPatch {
     /**
      * Creates the MKCOL object.
      *
-     * @param string[] $resourceType List of resourcetype values.
-     * @param array $mutations List of new properties values.
+     * @param string[] $resourceType list of resourcetype values
+     * @param array    $mutations    list of new properties values
      */
-    function __construct(array $resourceType, array $mutations) {
-
+    public function __construct(array $resourceType, array $mutations)
+    {
         $this->resourceType = $resourceType;
         parent::__construct($mutations);
-
     }
 
     /**
@@ -47,10 +48,9 @@ class MkCol extends PropPatch {
      *
      * @return string[]
      */
-    function getResourceType() {
-
+    public function getResourceType()
+    {
         return $this->resourceType;
-
     }
 
     /**
@@ -61,12 +61,11 @@ class MkCol extends PropPatch {
      * checked.
      *
      * @param string|string[] $resourceType
+     *
      * @return bool
      */
-    function hasResourceType($resourceType) {
-
-        return count(array_diff((array)$resourceType, $this->resourceType)) === 0;
-
+    public function hasResourceType($resourceType)
+    {
+        return 0 === count(array_diff((array) $resourceType, $this->resourceType));
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Mount/Plugin.php b/vendor/sabre/dav/lib/DAV/Mount/Plugin.php
index dc923ad85..5eaa4d462 100644
--- a/vendor/sabre/dav/lib/DAV/Mount/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Mount/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Mount;
 
 use Sabre\DAV;
@@ -7,7 +9,7 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * This plugin provides support for RFC4709: Mounting WebDAV servers
+ * This plugin provides support for RFC4709: Mounting WebDAV servers.
  *
  * Simply append ?mount to any collection to generate the davmount response.
  *
@@ -15,40 +17,41 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     /**
-     * Reference to Server class
+     * Reference to Server class.
      *
      * @var DAV\Server
      */
     protected $server;
 
     /**
-     * Initializes the plugin and registers event handles
+     * Initializes the plugin and registers event handles.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
         $this->server->on('method:GET', [$this, 'httpGet'], 90);
-
     }
 
     /**
      * 'beforeMethod' event handles. This event handles intercepts GET requests ending
-     * with ?mount
+     * with ?mount.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpGet(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpGet(RequestInterface $request, ResponseInterface $response)
+    {
         $queryParams = $request->getQueryParameters();
-        if (!array_key_exists('mount', $queryParams)) return;
+        if (!array_key_exists('mount', $queryParams)) {
+            return;
+        }
 
         $currentUri = $request->getAbsoluteUrl();
 
@@ -59,28 +62,23 @@ class Plugin extends DAV\ServerPlugin {
 
         // Returning false to break the event chain
         return false;
-
     }
 
     /**
-     * Generates the davmount response
+     * Generates the davmount response.
      *
      * @param ResponseInterface $response
-     * @param string $uri absolute uri
-     * @return void
+     * @param string            $uri      absolute uri
      */
-    function davMount(ResponseInterface $response, $uri) {
-
+    public function davMount(ResponseInterface $response, $uri)
+    {
         $response->setStatus(200);
         $response->setHeader('Content-Type', 'application/davmount+xml');
         ob_start();
         echo '<?xml version="1.0"?>', "\n";
         echo "<dm:mount xmlns:dm=\"http://purl.org/NET/webdav/mount\">\n";
-        echo "  <dm:url>", htmlspecialchars($uri, ENT_NOQUOTES, 'UTF-8'), "</dm:url>\n";
-        echo "</dm:mount>";
+        echo '  <dm:url>', htmlspecialchars($uri, ENT_NOQUOTES, 'UTF-8'), "</dm:url>\n";
+        echo '</dm:mount>';
         $response->setBody(ob_get_clean());
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Node.php b/vendor/sabre/dav/lib/DAV/Node.php
index ef6eea18e..948060d9a 100644
--- a/vendor/sabre/dav/lib/DAV/Node.php
+++ b/vendor/sabre/dav/lib/DAV/Node.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * Node class
+ * Node class.
  *
  * This is a helper class, that should aid in getting nodes setup.
  *
@@ -11,8 +13,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Node implements INode {
-
+abstract class Node implements INode
+{
     /**
      * Returns the last modification time as a unix timestamp.
      *
@@ -20,35 +22,30 @@ abstract class Node implements INode {
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
 
     /**
-     * Deletes the current node
+     * Deletes the current node.
      *
      * @throws Exception\Forbidden
-     * @return void
      */
-    function delete() {
-
+    public function delete()
+    {
         throw new Exception\Forbidden('Permission denied to delete node');
-
     }
 
     /**
-     * Renames the node
+     * Renames the node.
      *
      * @param string $name The new name
+     *
      * @throws Exception\Forbidden
-     * @return void
      */
-    function setName($name) {
-
+    public function setName($name)
+    {
         throw new Exception\Forbidden('Permission denied to rename file');
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/PartialUpdate/IPatchSupport.php b/vendor/sabre/dav/lib/DAV/PartialUpdate/IPatchSupport.php
index 97d24f9cb..e516f4d08 100644
--- a/vendor/sabre/dav/lib/DAV/PartialUpdate/IPatchSupport.php
+++ b/vendor/sabre/dav/lib/DAV/PartialUpdate/IPatchSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PartialUpdate;
 
 use Sabre\DAV;
@@ -7,14 +9,14 @@ use Sabre\DAV;
 /**
  * This interface provides a way to modify only part of a target resource
  * It may be used to update a file chunk, upload big a file into smaller
- * chunks or resume an upload
+ * chunks or resume an upload.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Jean-Tiare LE BIGOT (http://www.jtlebi.fr/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IPatchSupport extends DAV\IFile {
-
+interface IPatchSupport extends DAV\IFile
+{
     /**
      * Updates the file based on a range specification.
      *
@@ -38,10 +40,10 @@ interface IPatchSupport extends DAV\IFile {
      * time.
      *
      * @param resource|string $data
-     * @param int $rangeType
-     * @param int $offset
+     * @param int             $rangeType
+     * @param int             $offset
+     *
      * @return string|null
      */
-    function patch($data, $rangeType, $offset = null);
-
+    public function patch($data, $rangeType, $offset = null);
 }
diff --git a/vendor/sabre/dav/lib/DAV/PartialUpdate/Plugin.php b/vendor/sabre/dav/lib/DAV/PartialUpdate/Plugin.php
index 9c129d705..f8ffc3706 100644
--- a/vendor/sabre/dav/lib/DAV/PartialUpdate/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/PartialUpdate/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PartialUpdate;
 
 use Sabre\DAV;
@@ -7,7 +9,7 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * Partial update plugin (Patch method)
+ * Partial update plugin (Patch method).
  *
  * This plugin provides a way to modify only part of a target resource
  * It may bu used to update a file chunk, upload big a file into smaller
@@ -20,32 +22,30 @@ use Sabre\HTTP\ResponseInterface;
  * @author Jean-Tiare LE BIGOT (http://www.jtlebi.fr/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     const RANGE_APPEND = 1;
     const RANGE_START = 2;
     const RANGE_END = 3;
 
     /**
-     * Reference to server
+     * Reference to server.
      *
      * @var DAV\Server
      */
     protected $server;
 
     /**
-     * Initializes the plugin
+     * Initializes the plugin.
      *
      * This method is automatically called by the Server class after addPlugin.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
         $server->on('method:PATCH', [$this, 'httpPatch']);
-
     }
 
     /**
@@ -56,10 +56,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'partialupdate';
-
     }
 
     /**
@@ -74,10 +73,11 @@ class Plugin extends DAV\ServerPlugin {
      *     - the node implements our partial update interface
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getHTTPMethods($uri) {
-
+    public function getHTTPMethods($uri)
+    {
         $tree = $this->server->tree;
 
         if ($tree->nodeExists($uri)) {
@@ -86,8 +86,8 @@ class Plugin extends DAV\ServerPlugin {
                 return ['PATCH'];
             }
         }
-        return [];
 
+        return [];
     }
 
     /**
@@ -95,25 +95,23 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['sabredav-partialupdate'];
-
     }
 
     /**
-     * Patch an uri
+     * Patch an uri.
      *
      * The WebDAV patch request can be used to modify only a part of an
      * existing resource. If the resource does not exist yet and the first
      * offset is not 0, the request fails
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function httpPatch(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPatch(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
 
         // Get the node. Will throw a 404 if not found
@@ -129,53 +127,55 @@ class Plugin extends DAV\ServerPlugin {
         }
 
         $contentType = strtolower(
-            $request->getHeader('Content-Type')
+            (string) $request->getHeader('Content-Type')
         );
 
-        if ($contentType != 'application/x-sabredav-partialupdate') {
-            throw new DAV\Exception\UnsupportedMediaType('Unknown Content-Type header "' . $contentType . '"');
+        if ('application/x-sabredav-partialupdate' != $contentType) {
+            throw new DAV\Exception\UnsupportedMediaType('Unknown Content-Type header "'.$contentType.'"');
         }
 
         $len = $this->server->httpRequest->getHeader('Content-Length');
-        if (!$len) throw new DAV\Exception\LengthRequired('A Content-Length header is required');
-
+        if (!$len) {
+            throw new DAV\Exception\LengthRequired('A Content-Length header is required');
+        }
         switch ($range[0]) {
-            case self::RANGE_START :
+            case self::RANGE_START:
                 // Calculate the end-range if it doesn't exist.
                 if (!$range[2]) {
                     $range[2] = $range[1] + $len - 1;
                 } else {
                     if ($range[2] < $range[1]) {
-                        throw new DAV\Exception\RequestedRangeNotSatisfiable('The end offset (' . $range[2] . ') is lower than the start offset (' . $range[1] . ')');
+                        throw new DAV\Exception\RequestedRangeNotSatisfiable('The end offset ('.$range[2].') is lower than the start offset ('.$range[1].')');
                     }
                     if ($range[2] - $range[1] + 1 != $len) {
-                        throw new DAV\Exception\RequestedRangeNotSatisfiable('Actual data length (' . $len . ') is not consistent with begin (' . $range[1] . ') and end (' . $range[2] . ') offsets');
+                        throw new DAV\Exception\RequestedRangeNotSatisfiable('Actual data length ('.$len.') is not consistent with begin ('.$range[1].') and end ('.$range[2].') offsets');
                     }
                 }
                 break;
         }
 
-        if (!$this->server->emit('beforeWriteContent', [$path, $node, null]))
+        if (!$this->server->emit('beforeWriteContent', [$path, $node, null])) {
             return;
+        }
 
         $body = $this->server->httpRequest->getBody();
 
-
         $etag = $node->patch($body, $range[0], isset($range[1]) ? $range[1] : null);
 
         $this->server->emit('afterWriteContent', [$path, $node]);
 
         $response->setHeader('Content-Length', '0');
-        if ($etag) $response->setHeader('ETag', $etag);
+        if ($etag) {
+            $response->setHeader('ETag', $etag);
+        }
         $response->setStatus(204);
 
         // Breaks the event chain
         return false;
-
     }
 
     /**
-     * Returns the HTTP custom range update header
+     * Returns the HTTP custom range update header.
      *
      * This method returns null if there is no well-formed HTTP range request
      * header. It returns array(1) if it was an append request, array(2,
@@ -192,24 +192,28 @@ class Plugin extends DAV\ServerPlugin {
      * [3,-5] - update from 5 bytes from the end of the file.
      *
      * @param RequestInterface $request
+     *
      * @return array|null
      */
-    function getHTTPUpdateRange(RequestInterface $request) {
-
+    public function getHTTPUpdateRange(RequestInterface $request)
+    {
         $range = $request->getHeader('X-Update-Range');
-        if (is_null($range)) return null;
+        if (is_null($range)) {
+            return null;
+        }
 
         // Matching "Range: bytes=1234-5678: both numbers are optional
 
-        if (!preg_match('/^(append)|(?:bytes=([0-9]+)-([0-9]*))|(?:bytes=(-[0-9]+))$/i', $range, $matches)) return null;
+        if (!preg_match('/^(append)|(?:bytes=([0-9]+)-([0-9]*))|(?:bytes=(-[0-9]+))$/i', $range, $matches)) {
+            return null;
+        }
 
-        if ($matches[1] === 'append') {
+        if ('append' === $matches[1]) {
             return [self::RANGE_APPEND];
         } elseif (strlen($matches[2]) > 0) {
-            return [self::RANGE_START, $matches[2], $matches[3] ?: null];
+            return [self::RANGE_START, (int) $matches[2], (int) $matches[3] ?: null];
         } else {
-            return [self::RANGE_END, $matches[4]];
+            return [self::RANGE_END, (int) $matches[4]];
         }
-
     }
 }
diff --git a/vendor/sabre/dav/lib/DAV/PropFind.php b/vendor/sabre/dav/lib/DAV/PropFind.php
index 0940a1ce2..4b6fe28eb 100644
--- a/vendor/sabre/dav/lib/DAV/PropFind.php
+++ b/vendor/sabre/dav/lib/DAV/PropFind.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
@@ -8,10 +10,10 @@ namespace Sabre\DAV;
  * It contains the type of PROPFIND request, which properties were requested
  * and also the returned items.
  */
-class PropFind {
-
+class PropFind
+{
     /**
-     * A normal propfind
+     * A normal propfind.
      */
     const NORMAL = 0;
 
@@ -33,21 +35,21 @@ class PropFind {
     const PROPNAME = 2;
 
     /**
-     * Creates the PROPFIND object
+     * Creates the PROPFIND object.
      *
      * @param string $path
-     * @param array $properties
-     * @param int $depth
-     * @param int $requestType
+     * @param array  $properties
+     * @param int    $depth
+     * @param int    $requestType
      */
-    function __construct($path, array $properties, $depth = 0, $requestType = self::NORMAL) {
-
+    public function __construct($path, array $properties, $depth = 0, $requestType = self::NORMAL)
+    {
         $this->path = $path;
         $this->properties = $properties;
         $this->depth = $depth;
         $this->requestType = $requestType;
 
-        if ($requestType === self::ALLPROPS) {
+        if (self::ALLPROPS === $requestType) {
             $this->properties = [
                 '{DAV:}getlastmodified',
                 '{DAV:}getcontentlength',
@@ -60,13 +62,10 @@ class PropFind {
         }
 
         foreach ($this->properties as $propertyName) {
-
             // Seeding properties with 404's.
             $this->result[$propertyName] = [404, null];
-
         }
         $this->itemsLeft = count($this->result);
-
     }
 
     /**
@@ -88,68 +87,65 @@ class PropFind {
      * It's also possible to not pass a callback, but immediately pass a value
      *
      * @param string $propertyName
-     * @param mixed $valueOrCallBack
-     * @return void
+     * @param mixed  $valueOrCallBack
      */
-    function handle($propertyName, $valueOrCallBack) {
-
-        if ($this->itemsLeft && isset($this->result[$propertyName]) && $this->result[$propertyName][0] === 404) {
+    public function handle($propertyName, $valueOrCallBack)
+    {
+        if ($this->itemsLeft && isset($this->result[$propertyName]) && 404 === $this->result[$propertyName][0]) {
             if (is_callable($valueOrCallBack)) {
                 $value = $valueOrCallBack();
             } else {
                 $value = $valueOrCallBack;
             }
             if (!is_null($value)) {
-                $this->itemsLeft--;
+                --$this->itemsLeft;
                 $this->result[$propertyName] = [200, $value];
             }
         }
-
     }
 
     /**
-     * Sets the value of the property
+     * Sets the value of the property.
      *
      * If status is not supplied, the status will default to 200 for non-null
      * properties, and 404 for null properties.
      *
      * @param string $propertyName
-     * @param mixed $value
-     * @param int $status
-     * @return void
+     * @param mixed  $value
+     * @param int    $status
      */
-    function set($propertyName, $value, $status = null) {
-
+    public function set($propertyName, $value, $status = null)
+    {
         if (is_null($status)) {
             $status = is_null($value) ? 404 : 200;
         }
         // If this is an ALLPROPS request and the property is
         // unknown, add it to the result; else ignore it:
         if (!isset($this->result[$propertyName])) {
-            if ($this->requestType === self::ALLPROPS) {
+            if (self::ALLPROPS === $this->requestType) {
                 $this->result[$propertyName] = [$status, $value];
             }
+
             return;
         }
-        if ($status !== 404 && $this->result[$propertyName][0] === 404) {
-            $this->itemsLeft--;
-        } elseif ($status === 404 && $this->result[$propertyName][0] !== 404) {
-            $this->itemsLeft++;
+        if (404 !== $status && 404 === $this->result[$propertyName][0]) {
+            --$this->itemsLeft;
+        } elseif (404 === $status && 404 !== $this->result[$propertyName][0]) {
+            ++$this->itemsLeft;
         }
         $this->result[$propertyName] = [$status, $value];
-
     }
 
     /**
      * Returns the current value for a property.
      *
      * @param string $propertyName
+     *
      * @return mixed
      */
-    function get($propertyName) {
-
+    public function get($propertyName)
+    {
         return isset($this->result[$propertyName]) ? $this->result[$propertyName][1] : null;
-
     }
 
     /**
@@ -159,24 +155,22 @@ class PropFind {
      * null will be returned.
      *
      * @param string $propertyName
+     *
      * @return int|null
      */
-    function getStatus($propertyName) {
-
+    public function getStatus($propertyName)
+    {
         return isset($this->result[$propertyName]) ? $this->result[$propertyName][0] : null;
-
     }
 
     /**
      * Updates the path for this PROPFIND.
      *
      * @param string $path
-     * @return void
      */
-    function setPath($path) {
-
+    public function setPath($path)
+    {
         $this->path = $path;
-
     }
 
     /**
@@ -184,10 +178,9 @@ class PropFind {
      *
      * @return string
      */
-    function getPath() {
-
+    public function getPath()
+    {
         return $this->path;
-
     }
 
     /**
@@ -195,22 +188,19 @@ class PropFind {
      *
      * @return int
      */
-    function getDepth() {
-
+    public function getDepth()
+    {
         return $this->depth;
-
     }
 
     /**
      * Updates the depth of this propfind request.
      *
      * @param int $depth
-     * @return void
      */
-    function setDepth($depth) {
-
+    public function setDepth($depth)
+    {
         $this->depth = $depth;
-
     }
 
     /**
@@ -219,19 +209,19 @@ class PropFind {
      *
      * @return array
      */
-    function get404Properties() {
-
-        if ($this->itemsLeft === 0) {
+    public function get404Properties()
+    {
+        if (0 === $this->itemsLeft) {
             return [];
         }
         $result = [];
         foreach ($this->result as $propertyName => $stuff) {
-            if ($stuff[0] === 404) {
+            if (404 === $stuff[0]) {
                 $result[] = $propertyName;
             }
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -241,10 +231,9 @@ class PropFind {
      *
      * @return array
      */
-    function getRequestedProperties() {
-
+    public function getRequestedProperties()
+    {
         return $this->properties;
-
     }
 
     /**
@@ -252,10 +241,9 @@ class PropFind {
      *
      * @return bool
      */
-    function isAllProps() {
-
-        return $this->requestType === self::ALLPROPS;
-
+    public function isAllProps()
+    {
+        return self::ALLPROPS === $this->requestType;
     }
 
     /**
@@ -270,8 +258,8 @@ class PropFind {
      *
      * @return array
      */
-    function getResultForMultiStatus() {
-
+    public function getResultForMultiStatus()
+    {
         $r = [
             200 => [],
             404 => [],
@@ -284,9 +272,11 @@ class PropFind {
             }
         }
         // Removing the 404's for multi-status requests.
-        if ($this->requestType === self::ALLPROPS) unset($r[404]);
-        return $r;
+        if (self::ALLPROPS === $this->requestType) {
+            unset($r[404]);
+        }
 
+        return $r;
     }
 
     /**
@@ -307,12 +297,12 @@ class PropFind {
     protected $depth = 0;
 
     /**
-     * The type of request. See the TYPE constants
+     * The type of request. See the TYPE constants.
      */
     protected $requestType;
 
     /**
-     * A list of requested properties
+     * A list of requested properties.
      *
      * @var array
      */
@@ -343,5 +333,4 @@ class PropFind {
      * @var int
      */
     protected $itemsLeft;
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/PropPatch.php b/vendor/sabre/dav/lib/DAV/PropPatch.php
index 6d599dacc..160bdb1a8 100644
--- a/vendor/sabre/dav/lib/DAV/PropPatch.php
+++ b/vendor/sabre/dav/lib/DAV/PropPatch.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use UnexpectedValueException;
@@ -17,8 +19,8 @@ use UnexpectedValueException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PropPatch {
-
+class PropPatch
+{
     /**
      * Properties that are being updated.
      *
@@ -52,14 +54,13 @@ class PropPatch {
     protected $failed = false;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param array $mutations A list of updates
      */
-    function __construct(array $mutations) {
-
+    public function __construct(array $mutations)
+    {
         $this->mutations = $mutations;
-
     }
 
     /**
@@ -81,21 +82,17 @@ class PropPatch {
      * code associated with the operation.
      *
      * @param string|string[] $properties
-     * @param callable $callback
-     * @return void
+     * @param callable        $callback
      */
-    function handle($properties, callable $callback) {
-
+    public function handle($properties, callable $callback)
+    {
         $usedProperties = [];
-        foreach ((array)$properties as $propertyName) {
-
+        foreach ((array) $properties as $propertyName) {
             if (array_key_exists($propertyName, $this->mutations) && !isset($this->result[$propertyName])) {
-
                 $usedProperties[] = $propertyName;
                 // HTTP Accepted
                 $this->result[$propertyName] = 202;
             }
-
         }
 
         // Only registering if there's any unhandled properties.
@@ -107,9 +104,8 @@ class PropPatch {
             // to also make sure that it stays that way, so the commit function
             // knows how to format the arguments to the callback.
             is_string($properties) ? $properties : $usedProperties,
-            $callback
+            $callback,
         ];
-
     }
 
     /**
@@ -118,10 +114,9 @@ class PropPatch {
      * this that you promise to process _all_ properties that are coming in.
      *
      * @param callable $callback
-     * @return void
      */
-    function handleRemaining(callable $callback) {
-
+    public function handleRemaining(callable $callback)
+    {
         $properties = $this->getRemainingMutations();
         if (!$properties) {
             // Nothing to do, don't register callback
@@ -134,44 +129,39 @@ class PropPatch {
 
             $this->propertyUpdateCallbacks[] = [
                 $properties,
-                $callback
+                $callback,
             ];
         }
-
     }
 
     /**
      * Sets the result code for one or more properties.
      *
      * @param string|string[] $properties
-     * @param int $resultCode
-     * @return void
+     * @param int             $resultCode
      */
-    function setResultCode($properties, $resultCode) {
-
-        foreach ((array)$properties as $propertyName) {
+    public function setResultCode($properties, $resultCode)
+    {
+        foreach ((array) $properties as $propertyName) {
             $this->result[$propertyName] = $resultCode;
         }
 
         if ($resultCode >= 400) {
             $this->failed = true;
         }
-
     }
 
     /**
      * Sets the result code for all properties that did not have a result yet.
      *
      * @param int $resultCode
-     * @return void
      */
-    function setRemainingResultCode($resultCode) {
-
+    public function setRemainingResultCode($resultCode)
+    {
         $this->setResultCode(
             $this->getRemainingMutations(),
             $resultCode
         );
-
     }
 
     /**
@@ -181,8 +171,8 @@ class PropPatch {
      *
      * @return string[]
      */
-    function getRemainingMutations() {
-
+    public function getRemainingMutations()
+    {
         $remaining = [];
         foreach ($this->mutations as $propertyName => $propValue) {
             if (!isset($this->result[$propertyName])) {
@@ -191,7 +181,6 @@ class PropPatch {
         }
 
         return $remaining;
-
     }
 
     /**
@@ -201,8 +190,8 @@ class PropPatch {
      *
      * @return array
      */
-    function getRemainingValues() {
-
+    public function getRemainingValues()
+    {
         $remaining = [];
         foreach ($this->mutations as $propertyName => $propValue) {
             if (!isset($this->result[$propertyName])) {
@@ -211,7 +200,6 @@ class PropPatch {
         }
 
         return $remaining;
-
     }
 
     /**
@@ -222,20 +210,17 @@ class PropPatch {
      *
      * @return bool
      */
-    function commit() {
-
+    public function commit()
+    {
         // First we validate if every property has a handler
         foreach ($this->mutations as $propertyName => $value) {
-
             if (!isset($this->result[$propertyName])) {
                 $this->failed = true;
                 $this->result[$propertyName] = 403;
             }
-
         }
 
         foreach ($this->propertyUpdateCallbacks as $callbackInfo) {
-
             if ($this->failed) {
                 break;
             }
@@ -244,37 +229,32 @@ class PropPatch {
             } else {
                 $this->doCallbackMultiProp($callbackInfo[0], $callbackInfo[1]);
             }
-
         }
 
-        /**
+        /*
          * If anywhere in this operation updating a property failed, we must
          * update all other properties accordingly.
          */
         if ($this->failed) {
-
             foreach ($this->result as $propertyName => $status) {
-                if ($status === 202) {
+                if (202 === $status) {
                     // Failed dependency
                     $this->result[$propertyName] = 424;
                 }
             }
-
         }
 
         return !$this->failed;
-
     }
 
     /**
      * Executes a property callback with the single-property syntax.
      *
-     * @param string $propertyName
+     * @param string   $propertyName
      * @param callable $callback
-     * @return void
      */
-    private function doCallBackSingleProp($propertyName, callable $callback) {
-
+    private function doCallBackSingleProp($propertyName, callable $callback)
+    {
         $result = $callback($this->mutations[$propertyName]);
         if (is_bool($result)) {
             if ($result) {
@@ -297,18 +277,16 @@ class PropPatch {
         if ($result >= 400) {
             $this->failed = true;
         }
-
     }
 
     /**
      * Executes a property callback with the multi-property syntax.
      *
-     * @param array $propertyList
+     * @param array    $propertyList
      * @param callable $callback
-     * @return void
      */
-    private function doCallBackMultiProp(array $propertyList, callable $callback) {
-
+    private function doCallBackMultiProp(array $propertyList, callable $callback)
+    {
         $argument = [];
         foreach ($propertyList as $propertyName) {
             $argument[$propertyName] = $this->mutations[$propertyName];
@@ -327,16 +305,13 @@ class PropPatch {
                     $this->failed = true;
                 }
                 $this->result[$propertyName] = $resultCode;
-
             }
-        } elseif ($result === true) {
-
+        } elseif (true === $result) {
             // Success
             foreach ($argument as $propertyName => $propertyValue) {
                 $this->result[$propertyName] = is_null($propertyValue) ? 204 : 200;
             }
-
-        } elseif ($result === false) {
+        } elseif (false === $result) {
             // Fail :(
             $this->failed = true;
             foreach ($propertyList as $propertyName) {
@@ -345,7 +320,6 @@ class PropPatch {
         } else {
             throw new UnexpectedValueException('A callback sent to handle() did not return an array or a bool');
         }
-
     }
 
     /**
@@ -353,21 +327,18 @@ class PropPatch {
      *
      * @return array
      */
-    function getResult() {
-
+    public function getResult()
+    {
         return $this->result;
-
     }
 
     /**
-     * Returns the full list of mutations
+     * Returns the full list of mutations.
      *
      * @return array
      */
-    function getMutations() {
-
+    public function getMutations()
+    {
         return $this->mutations;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/BackendInterface.php b/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/BackendInterface.php
index b15d7fef9..4bdc44775 100644
--- a/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/BackendInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PropertyStorage\Backend;
 
 use Sabre\DAV\PropFind;
@@ -15,8 +17,8 @@ use Sabre\DAV\PropPatch;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface BackendInterface {
-
+interface BackendInterface
+{
     /**
      * Fetches properties for a path.
      *
@@ -30,14 +32,13 @@ interface BackendInterface {
      * However, you can also support the 'allprops' property here. In that
      * case, you should check for $propFind->isAllProps().
      *
-     * @param string $path
+     * @param string   $path
      * @param PropFind $propFind
-     * @return void
      */
-    function propFind($path, PropFind $propFind);
+    public function propFind($path, PropFind $propFind);
 
     /**
-     * Updates properties for a path
+     * Updates properties for a path.
      *
      * This method received a PropPatch object, which contains all the
      * information about the update.
@@ -45,11 +46,10 @@ interface BackendInterface {
      * Usually you would want to call 'handleRemaining' on this object, to get;
      * a list of all properties that need to be stored.
      *
-     * @param string $path
+     * @param string    $path
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch($path, PropPatch $propPatch);
+    public function propPatch($path, PropPatch $propPatch);
 
     /**
      * This method is called after a node is deleted.
@@ -60,12 +60,11 @@ interface BackendInterface {
      * tree.
      *
      * @param string $path
-     * @return void
      */
-    function delete($path);
+    public function delete($path);
 
     /**
-     * This method is called after a successful MOVE
+     * This method is called after a successful MOVE.
      *
      * This should be used to migrate all properties from one path to another.
      * Note that entire collections may be moved, so ensure that all properties
@@ -73,8 +72,6 @@ interface BackendInterface {
      *
      * @param string $source
      * @param string $destination
-     * @return void
      */
-    function move($source, $destination);
-
+    public function move($source, $destination);
 }
diff --git a/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php b/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php
index 6f3f1feaf..e640f420e 100644
--- a/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PropertyStorage\Backend;
 
 use Sabre\DAV\PropFind;
@@ -18,8 +20,8 @@ use Sabre\DAV\Xml\Property\Complex;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PDO implements BackendInterface {
-
+class PDO implements BackendInterface
+{
     /**
      * Value is stored as string.
      */
@@ -36,28 +38,27 @@ class PDO implements BackendInterface {
     const VT_OBJECT = 3;
 
     /**
-     * PDO
+     * PDO.
      *
      * @var \PDO
      */
     protected $pdo;
 
     /**
-     * PDO table name we'll be using
+     * PDO table name we'll be using.
      *
      * @var string
      */
     public $tableName = 'propertystorage';
 
     /**
-     * Creates the PDO property storage engine
+     * Creates the PDO property storage engine.
      *
      * @param \PDO $pdo
      */
-    function __construct(\PDO $pdo) {
-
+    public function __construct(\PDO $pdo)
+    {
         $this->pdo = $pdo;
-
     }
 
     /**
@@ -73,42 +74,40 @@ class PDO implements BackendInterface {
      * However, you can also support the 'allprops' property here. In that
      * case, you should check for $propFind->isAllProps().
      *
-     * @param string $path
+     * @param string   $path
      * @param PropFind $propFind
-     * @return void
      */
-    function propFind($path, PropFind $propFind) {
-
-        if (!$propFind->isAllProps() && count($propFind->get404Properties()) === 0) {
+    public function propFind($path, PropFind $propFind)
+    {
+        if (!$propFind->isAllProps() && 0 === count($propFind->get404Properties())) {
             return;
         }
 
-        $query = 'SELECT name, value, valuetype FROM ' . $this->tableName . ' WHERE path = ?';
+        $query = 'SELECT name, value, valuetype FROM '.$this->tableName.' WHERE path = ?';
         $stmt = $this->pdo->prepare($query);
         $stmt->execute([$path]);
 
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-            if (gettype($row['value']) === 'resource') {
+            if ('resource' === gettype($row['value'])) {
                 $row['value'] = stream_get_contents($row['value']);
             }
             switch ($row['valuetype']) {
-                case null :
-                case self::VT_STRING :
+                case null:
+                case self::VT_STRING:
                     $propFind->set($row['name'], $row['value']);
                     break;
-                case self::VT_XML :
+                case self::VT_XML:
                     $propFind->set($row['name'], new Complex($row['value']));
                     break;
-                case self::VT_OBJECT :
+                case self::VT_OBJECT:
                     $propFind->set($row['name'], unserialize($row['value']));
                     break;
             }
         }
-
     }
 
     /**
-     * Updates properties for a path
+     * Updates properties for a path.
      *
      * This method received a PropPatch object, which contains all the
      * information about the update.
@@ -116,38 +115,30 @@ class PDO implements BackendInterface {
      * Usually you would want to call 'handleRemaining' on this object, to get;
      * a list of all properties that need to be stored.
      *
-     * @param string $path
+     * @param string    $path
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch($path, PropPatch $propPatch) {
-
-        $propPatch->handleRemaining(function($properties) use ($path) {
-
-
-            if ($this->pdo->getAttribute(\PDO::ATTR_DRIVER_NAME) === 'pgsql') {
-
+    public function propPatch($path, PropPatch $propPatch)
+    {
+        $propPatch->handleRemaining(function ($properties) use ($path) {
+            if ('pgsql' === $this->pdo->getAttribute(\PDO::ATTR_DRIVER_NAME)) {
                 $updateSql = <<<SQL
 INSERT INTO {$this->tableName} (path, name, valuetype, value)
 VALUES (:path, :name, :valuetype, :value)
 ON CONFLICT (path, name)
 DO UPDATE SET valuetype = :valuetype, value = :value
 SQL;
-
-
             } else {
                 $updateSql = <<<SQL
 REPLACE INTO {$this->tableName} (path, name, valuetype, value)
 VALUES (:path, :name, :valuetype, :value)
 SQL;
-
             }
 
             $updateStmt = $this->pdo->prepare($updateSql);
-            $deleteStmt = $this->pdo->prepare("DELETE FROM " . $this->tableName . " WHERE path = ? AND name = ?");
+            $deleteStmt = $this->pdo->prepare('DELETE FROM '.$this->tableName.' WHERE path = ? AND name = ?');
 
             foreach ($properties as $name => $value) {
-
                 if (!is_null($value)) {
                     if (is_scalar($value)) {
                         $valueType = self::VT_STRING;
@@ -165,17 +156,13 @@ SQL;
                     $updateStmt->bindParam('value', $value, \PDO::PARAM_LOB);
 
                     $updateStmt->execute();
-
                 } else {
                     $deleteStmt->execute([$path, $name]);
                 }
-
             }
 
             return true;
-
         });
-
     }
 
     /**
@@ -187,26 +174,24 @@ SQL;
      * tree.
      *
      * @param string $path
-     * @return void
      */
-    function delete($path) {
-
-        $stmt = $this->pdo->prepare("DELETE FROM " . $this->tableName . "  WHERE path = ? OR path LIKE ? ESCAPE '='");
+    public function delete($path)
+    {
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->tableName."  WHERE path = ? OR path LIKE ? ESCAPE '='");
         $childPath = strtr(
             $path,
             [
                 '=' => '==',
                 '%' => '=%',
-                '_' => '=_'
+                '_' => '=_',
             ]
-        ) . '/%';
+        ).'/%';
 
         $stmt->execute([$path, $childPath]);
-
     }
 
     /**
-     * This method is called after a successful MOVE
+     * This method is called after a successful MOVE.
      *
      * This should be used to migrate all properties from one path to another.
      * Note that entire collections may be moved, so ensure that all properties
@@ -214,33 +199,30 @@ SQL;
      *
      * @param string $source
      * @param string $destination
-     * @return void
      */
-    function move($source, $destination) {
-
+    public function move($source, $destination)
+    {
         // I don't know a way to write this all in a single sql query that's
         // also compatible across db engines, so we're letting PHP do all the
         // updates. Much slower, but it should still be pretty fast in most
         // cases.
-        $select = $this->pdo->prepare('SELECT id, path FROM ' . $this->tableName . '  WHERE path = ? OR path LIKE ?');
-        $select->execute([$source, $source . '/%']);
+        $select = $this->pdo->prepare('SELECT id, path FROM '.$this->tableName.'  WHERE path = ? OR path LIKE ?');
+        $select->execute([$source, $source.'/%']);
 
-        $update = $this->pdo->prepare('UPDATE ' . $this->tableName . ' SET path = ? WHERE id = ?');
+        $update = $this->pdo->prepare('UPDATE '.$this->tableName.' SET path = ? WHERE id = ?');
         while ($row = $select->fetch(\PDO::FETCH_ASSOC)) {
-
             // Sanity check. SQL may select too many records, such as records
             // with different cases.
-            if ($row['path'] !== $source && strpos($row['path'], $source . '/') !== 0) continue;
+            if ($row['path'] !== $source && 0 !== strpos($row['path'], $source.'/')) {
+                continue;
+            }
 
             $trailingPart = substr($row['path'], strlen($source) + 1);
             $newPath = $destination;
             if ($trailingPart) {
-                $newPath .= '/' . $trailingPart;
+                $newPath .= '/'.$trailingPart;
             }
             $update->execute([$newPath, $row['id']]);
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/PropertyStorage/Plugin.php b/vendor/sabre/dav/lib/DAV/PropertyStorage/Plugin.php
index a66a14113..aa8610eb8 100644
--- a/vendor/sabre/dav/lib/DAV/PropertyStorage/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/PropertyStorage/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PropertyStorage;
 
 use Sabre\DAV\INode;
@@ -23,8 +25,8 @@ use Sabre\DAV\ServerPlugin;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends ServerPlugin {
-
+class Plugin extends ServerPlugin
+{
     /**
      * If you only want this plugin to store properties for a limited set of
      * paths, you can use a pathFilter to do this.
@@ -43,14 +45,13 @@ class Plugin extends ServerPlugin {
     public $backend;
 
     /**
-     * Creates the plugin
+     * Creates the plugin.
      *
      * @param Backend\BackendInterface $backend
      */
-    function __construct(Backend\BackendInterface $backend) {
-
+    public function __construct(Backend\BackendInterface $backend)
+    {
         $this->backend = $backend;
-
     }
 
     /**
@@ -62,15 +63,13 @@ class Plugin extends ServerPlugin {
      * This method should set up the required event subscriptions.
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
-        $server->on('propFind',    [$this, 'propFind'], 130);
-        $server->on('propPatch',   [$this, 'propPatch'], 300);
-        $server->on('afterMove',   [$this, 'afterMove']);
+    public function initialize(Server $server)
+    {
+        $server->on('propFind', [$this, 'propFind'], 130);
+        $server->on('propPatch', [$this, 'propPatch'], 300);
+        $server->on('afterMove', [$this, 'afterMove']);
         $server->on('afterUnbind', [$this, 'afterUnbind']);
-
     }
 
     /**
@@ -80,34 +79,34 @@ class Plugin extends ServerPlugin {
      * plugin will look in the property storage backend to find them.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFind(PropFind $propFind, INode $node) {
-
+    public function propFind(PropFind $propFind, INode $node)
+    {
         $path = $propFind->getPath();
         $pathFilter = $this->pathFilter;
-        if ($pathFilter && !$pathFilter($path)) return;
+        if ($pathFilter && !$pathFilter($path)) {
+            return;
+        }
         $this->backend->propFind($propFind->getPath(), $propFind);
-
     }
 
     /**
-     * Called during PROPPATCH operations
+     * Called during PROPPATCH operations.
      *
      * If there's any updated properties that haven't been stored, the
      * propertystorage backend can handle it.
      *
-     * @param string $path
+     * @param string    $path
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch($path, PropPatch $propPatch) {
-
+    public function propPatch($path, PropPatch $propPatch)
+    {
         $pathFilter = $this->pathFilter;
-        if ($pathFilter && !$pathFilter($path)) return;
+        if ($pathFilter && !$pathFilter($path)) {
+            return;
+        }
         $this->backend->propPatch($path, $propPatch);
-
     }
 
     /**
@@ -117,14 +116,14 @@ class Plugin extends ServerPlugin {
      * database.
      *
      * @param string $path
-     * @return void
      */
-    function afterUnbind($path) {
-
+    public function afterUnbind($path)
+    {
         $pathFilter = $this->pathFilter;
-        if ($pathFilter && !$pathFilter($path)) return;
+        if ($pathFilter && !$pathFilter($path)) {
+            return;
+        }
         $this->backend->delete($path);
-
     }
 
     /**
@@ -134,18 +133,20 @@ class Plugin extends ServerPlugin {
      *
      * @param string $source
      * @param string $destination
-     * @return void
      */
-    function afterMove($source, $destination) {
-
+    public function afterMove($source, $destination)
+    {
         $pathFilter = $this->pathFilter;
-        if ($pathFilter && !$pathFilter($source)) return;
+        if ($pathFilter && !$pathFilter($source)) {
+            return;
+        }
         // If the destination is filtered, afterUnbind will handle cleaning up
         // the properties.
-        if ($pathFilter && !$pathFilter($destination)) return;
+        if ($pathFilter && !$pathFilter($destination)) {
+            return;
+        }
 
         $this->backend->move($source, $destination);
-
     }
 
     /**
@@ -156,10 +157,9 @@ class Plugin extends ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'property-storage';
-
     }
 
     /**
@@ -173,13 +173,12 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'This plugin allows any arbitrary WebDAV property to be set on any resource.',
-            'link'        => 'http://sabre.io/dav/property-storage/',
+            'link' => 'http://sabre.io/dav/property-storage/',
         ];
-
     }
 }
diff --git a/vendor/sabre/dav/lib/DAV/Server.php b/vendor/sabre/dav/lib/DAV/Server.php
index f7fcf3057..09760e9d1 100644
--- a/vendor/sabre/dav/lib/DAV/Server.php
+++ b/vendor/sabre/dav/lib/DAV/Server.php
@@ -1,76 +1,79 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Psr\Log\LoggerAwareInterface;
 use Psr\Log\LoggerAwareTrait;
 use Psr\Log\LoggerInterface;
 use Psr\Log\NullLogger;
-use Sabre\Event\EventEmitter;
+use Sabre\Event\EmitterInterface;
+use Sabre\Event\WildcardEmitterTrait;
 use Sabre\HTTP;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
-use Sabre\HTTP\URLUtil;
 use Sabre\Uri;
 
 /**
- * Main DAV server class
+ * Main DAV server class.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Server extends EventEmitter implements LoggerAwareInterface {
-
+class Server implements LoggerAwareInterface, EmitterInterface
+{
+    use WildcardEmitterTrait;
     use LoggerAwareTrait;
 
     /**
-     * Infinity is used for some request supporting the HTTP Depth header and indicates that the operation should traverse the entire tree
+     * Infinity is used for some request supporting the HTTP Depth header and indicates that the operation should traverse the entire tree.
      */
     const DEPTH_INFINITY = -1;
 
     /**
-     * XML namespace for all SabreDAV related elements
+     * XML namespace for all SabreDAV related elements.
      */
     const NS_SABREDAV = 'http://sabredav.org/ns';
 
     /**
-     * The tree object
+     * The tree object.
      *
      * @var Tree
      */
     public $tree;
 
     /**
-     * The base uri
+     * The base uri.
      *
      * @var string
      */
     protected $baseUri = null;
 
     /**
-     * httpResponse
+     * httpResponse.
      *
      * @var HTTP\Response
      */
     public $httpResponse;
 
     /**
-     * httpRequest
+     * httpRequest.
      *
      * @var HTTP\Request
      */
     public $httpRequest;
 
     /**
-     * PHP HTTP Sapi
+     * PHP HTTP Sapi.
      *
      * @var HTTP\Sapi
      */
     public $sapi;
 
     /**
-     * The list of plugins
+     * The list of plugins.
      *
      * @var array
      */
@@ -98,7 +101,6 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * @var string[]
      */
     public $protectedProperties = [
-
         // RFC4918
         '{DAV:}getcontentlength',
         '{DAV:}getetag',
@@ -129,12 +131,11 @@ class Server extends EventEmitter implements LoggerAwareInterface {
 
         // sabredav extensions
         '{http://sabredav.org/ns}sync-token',
-
     ];
 
     /**
      * This is a flag that allow or not showing file, line and code
-     * of the exception in the returned XML
+     * of the exception in the returned XML.
      *
      * @var bool
      */
@@ -181,10 +182,10 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *
      * @var bool
      */
-    static $exposeVersion = true;
+    public static $exposeVersion = true;
 
     /**
-     * Sets up the server
+     * Sets up the server.
      *
      * If a Sabre\DAV\Tree object is passed as an argument, it will
      * use it as the directory tree. If a Sabre\DAV\INode is passed, it
@@ -198,25 +199,15 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *
      * @param Tree|INode|array|null $treeOrNode The tree object
      */
-    function __construct($treeOrNode = null) {
-
+    public function __construct($treeOrNode = null)
+    {
         if ($treeOrNode instanceof Tree) {
             $this->tree = $treeOrNode;
         } elseif ($treeOrNode instanceof INode) {
             $this->tree = new Tree($treeOrNode);
         } elseif (is_array($treeOrNode)) {
-
-            // If it's an array, a list of nodes was passed, and we need to
-            // create the root node.
-            foreach ($treeOrNode as $node) {
-                if (!($node instanceof INode)) {
-                    throw new Exception('Invalid argument passed to constructor. If you\'re passing an array, all the values must implement Sabre\\DAV\\INode');
-                }
-            }
-
             $root = new SimpleCollection('root', $treeOrNode);
             $this->tree = new Tree($root);
-
         } elseif (is_null($treeOrNode)) {
             $root = new SimpleCollection('root');
             $this->tree = new Tree($root);
@@ -229,18 +220,14 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         $this->httpResponse = new HTTP\Response();
         $this->httpRequest = $this->sapi->getRequest();
         $this->addPlugin(new CorePlugin());
-
     }
 
     /**
-     * Starts the DAV Server
-     *
-     * @return void
+     * Starts the DAV Server.
      */
-    function exec() {
-
+    public function start()
+    {
         try {
-
             // If nginx (pre-1.2) is used as a proxy server, and SabreDAV as an
             // origin, we must make sure we send back HTTP/1.0 if this was
             // requested.
@@ -252,9 +239,7 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             // Setting the base url
             $this->httpRequest->setBaseUrl($this->getBaseUri());
             $this->invokeMethod($this->httpRequest, $this->httpResponse);
-
-        } catch (\Exception $e) {
-
+        } catch (\Throwable $e) {
             try {
                 $this->emit('exception', [$e]);
             } catch (\Exception $ignore) {
@@ -266,10 +251,8 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             $error->setAttribute('xmlns:s', self::NS_SABREDAV);
             $DOM->appendChild($error);
 
-            $h = function($v) {
-
-                return htmlspecialchars($v, ENT_NOQUOTES, 'UTF-8');
-
+            $h = function ($v) {
+                return htmlspecialchars((string) $v, ENT_NOQUOTES, 'UTF-8');
             };
 
             if (self::$exposeVersion) {
@@ -299,18 +282,13 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                 }
             }
 
-
             if ($e instanceof Exception) {
-
                 $httpCode = $e->getHTTPCode();
                 $e->serialize($this, $error);
                 $headers = $e->getHTTPHeaders($this);
-
             } else {
-
                 $httpCode = 500;
                 $headers = [];
-
             }
             $headers['Content-Type'] = 'application/xml; charset=utf-8';
 
@@ -318,37 +296,46 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             $this->httpResponse->setHeaders($headers);
             $this->httpResponse->setBody($DOM->saveXML());
             $this->sapi->sendResponse($this->httpResponse);
-
         }
+    }
 
+    /**
+     * Alias of start().
+     *
+     * @deprecated
+     */
+    public function exec()
+    {
+        $this->start();
     }
 
     /**
-     * Sets the base server uri
+     * Sets the base server uri.
      *
      * @param string $uri
-     * @return void
      */
-    function setBaseUri($uri) {
-
+    public function setBaseUri($uri)
+    {
         // If the baseUri does not end with a slash, we must add it
-        if ($uri[strlen($uri) - 1] !== '/')
+        if ('/' !== $uri[strlen($uri) - 1]) {
             $uri .= '/';
+        }
 
         $this->baseUri = $uri;
-
     }
 
     /**
-     * Returns the base responding uri
+     * Returns the base responding uri.
      *
      * @return string
      */
-    function getBaseUri() {
+    public function getBaseUri()
+    {
+        if (is_null($this->baseUri)) {
+            $this->baseUri = $this->guessBaseUri();
+        }
 
-        if (is_null($this->baseUri)) $this->baseUri = $this->guessBaseUri();
         return $this->baseUri;
-
     }
 
     /**
@@ -359,53 +346,50 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *
      * @return string
      */
-    function guessBaseUri() {
-
+    public function guessBaseUri()
+    {
         $pathInfo = $this->httpRequest->getRawServerValue('PATH_INFO');
         $uri = $this->httpRequest->getRawServerValue('REQUEST_URI');
 
         // If PATH_INFO is found, we can assume it's accurate.
         if (!empty($pathInfo)) {
-
             // We need to make sure we ignore the QUERY_STRING part
-            if ($pos = strpos($uri, '?'))
+            if ($pos = strpos($uri, '?')) {
                 $uri = substr($uri, 0, $pos);
+            }
 
             // PATH_INFO is only set for urls, such as: /example.php/path
             // in that case PATH_INFO contains '/path'.
             // Note that REQUEST_URI is percent encoded, while PATH_INFO is
             // not, Therefore they are only comparable if we first decode
             // REQUEST_INFO as well.
-            $decodedUri = URLUtil::decodePath($uri);
+            $decodedUri = HTTP\decodePath($uri);
 
             // A simple sanity check:
             if (substr($decodedUri, strlen($decodedUri) - strlen($pathInfo)) === $pathInfo) {
                 $baseUri = substr($decodedUri, 0, strlen($decodedUri) - strlen($pathInfo));
-                return rtrim($baseUri, '/') . '/';
-            }
 
-            throw new Exception('The REQUEST_URI (' . $uri . ') did not end with the contents of PATH_INFO (' . $pathInfo . '). This server might be misconfigured.');
+                return rtrim($baseUri, '/').'/';
+            }
 
+            throw new Exception('The REQUEST_URI ('.$uri.') did not end with the contents of PATH_INFO ('.$pathInfo.'). This server might be misconfigured.');
         }
 
         // The last fallback is that we're just going to assume the server root.
         return '/';
-
     }
 
     /**
-     * Adds a plugin to the server
+     * Adds a plugin to the server.
      *
      * For more information, console the documentation of Sabre\DAV\ServerPlugin
      *
      * @param ServerPlugin $plugin
-     * @return void
      */
-    function addPlugin(ServerPlugin $plugin) {
-
+    public function addPlugin(ServerPlugin $plugin)
+    {
         $this->plugins[$plugin->getPluginName()] = $plugin;
         $plugin->initialize($this);
-
     }
 
     /**
@@ -414,26 +398,26 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * This function returns null if the plugin was not found.
      *
      * @param string $name
+     *
      * @return ServerPlugin
      */
-    function getPlugin($name) {
-
-        if (isset($this->plugins[$name]))
+    public function getPlugin($name)
+    {
+        if (isset($this->plugins[$name])) {
             return $this->plugins[$name];
+        }
 
         return null;
-
     }
 
     /**
-     * Returns all plugins
+     * Returns all plugins.
      *
      * @return array
      */
-    function getPlugins() {
-
+    public function getPlugins()
+    {
         return $this->plugins;
-
     }
 
     /**
@@ -441,29 +425,29 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *
      * @return LoggerInterface
      */
-    function getLogger() {
-
+    public function getLogger()
+    {
         if (!$this->logger) {
             $this->logger = new NullLogger();
         }
-        return $this->logger;
 
+        return $this->logger;
     }
 
     /**
-     * Handles a http request, and execute a method based on its name
+     * Handles a http request, and execute a method based on its name.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @param bool $sendResponse Whether to send the HTTP response to the DAV client.
-     * @return void
+     * @param bool              $sendResponse whether to send the HTTP response to the DAV client
      */
-    function invokeMethod(RequestInterface $request, ResponseInterface $response, $sendResponse = true) {
-
+    public function invokeMethod(RequestInterface $request, ResponseInterface $response, $sendResponse = true)
+    {
         $method = $request->getMethod();
 
-        if (!$this->emit('beforeMethod:' . $method, [$request, $response])) return;
-        if (!$this->emit('beforeMethod', [$request, $response])) return;
+        if (!$this->emit('beforeMethod:'.$method, [$request, $response])) {
+            return;
+        }
 
         if (self::$exposeVersion) {
             $response->setHeader('X-Sabre-Version', Version::VERSION);
@@ -473,32 +457,31 @@ class Server extends EventEmitter implements LoggerAwareInterface {
 
         if (!$this->checkPreconditions($request, $response)) {
             $this->sapi->sendResponse($response);
+
             return;
         }
 
-        if ($this->emit('method:' . $method, [$request, $response])) {
-            if ($this->emit('method', [$request, $response])) {
-                $exMessage = "There was no plugin in the system that was willing to handle this " . $method . " method.";
-                if ($method === "GET") {
-                    $exMessage .= " Enable the Browser plugin to get a better result here.";
-                }
-
-                // Unsupported method
-                throw new Exception\NotImplemented($exMessage);
+        if ($this->emit('method:'.$method, [$request, $response])) {
+            $exMessage = 'There was no plugin in the system that was willing to handle this '.$method.' method.';
+            if ('GET' === $method) {
+                $exMessage .= ' Enable the Browser plugin to get a better result here.';
             }
+
+            // Unsupported method
+            throw new Exception\NotImplemented($exMessage);
         }
 
-        if (!$this->emit('afterMethod:' . $method, [$request, $response])) return;
-        if (!$this->emit('afterMethod', [$request, $response])) return;
+        if (!$this->emit('afterMethod:'.$method, [$request, $response])) {
+            return;
+        }
 
-        if ($response->getStatus() === null) {
+        if (null === $response->getStatus()) {
             throw new Exception('No subsystem set a valid HTTP status code. Something must have interrupted the request without providing further detail.');
         }
         if ($sendResponse) {
             $this->sapi->sendResponse($response);
             $this->emit('afterResponse', [$request, $response]);
         }
-
     }
 
     // {{{ HTTP/WebDAV protocol helpers
@@ -507,10 +490,11 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * Returns an array with all the supported HTTP methods for a specific uri.
      *
      * @param string $path
+     *
      * @return array
      */
-    function getAllowedMethods($path) {
-
+    public function getAllowedMethods($path)
+    {
         $methods = [
             'OPTIONS',
             'GET',
@@ -521,7 +505,7 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             'PROPPATCH',
             'COPY',
             'MOVE',
-            'REPORT'
+            'REPORT',
         ];
 
         // The MKCOL is only allowed on an unmapped uri
@@ -532,22 +516,22 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         }
 
         // We're also checking if any of the plugins register any new methods
-        foreach ($this->plugins as $plugin) $methods = array_merge($methods, $plugin->getHTTPMethods($path));
+        foreach ($this->plugins as $plugin) {
+            $methods = array_merge($methods, $plugin->getHTTPMethods($path));
+        }
         array_unique($methods);
 
         return $methods;
-
     }
 
     /**
-     * Gets the uri for the request, keeping the base uri into consideration
+     * Gets the uri for the request, keeping the base uri into consideration.
      *
      * @return string
      */
-    function getRequestUri() {
-
+    public function getRequestUri()
+    {
         return $this->calculateUri($this->httpRequest->getUrl());
-
     }
 
     /**
@@ -559,66 +543,65 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *   * uri-decodes the path
      *
      * @param string $uri
+     *
      * @throws Exception\Forbidden A permission denied exception is thrown whenever there was an attempt to supply a uri outside of the base uri
+     *
      * @return string
      */
-    function calculateUri($uri) {
-
-        if ($uri[0] != '/' && strpos($uri, '://')) {
-
+    public function calculateUri($uri)
+    {
+        if ('' != $uri && '/' != $uri[0] && strpos($uri, '://')) {
             $uri = parse_url($uri, PHP_URL_PATH);
-
         }
 
-        $uri = Uri\normalize(str_replace('//', '/', $uri));
+        $uri = Uri\normalize(preg_replace('|/+|', '/', $uri));
         $baseUri = Uri\normalize($this->getBaseUri());
 
-        if (strpos($uri, $baseUri) === 0) {
-
-            return trim(URLUtil::decodePath(substr($uri, strlen($baseUri))), '/');
+        if (0 === strpos($uri, $baseUri)) {
+            return trim(HTTP\decodePath(substr($uri, strlen($baseUri))), '/');
 
         // A special case, if the baseUri was accessed without a trailing
         // slash, we'll accept it as well.
-        } elseif ($uri . '/' === $baseUri) {
-
+        } elseif ($uri.'/' === $baseUri) {
             return '';
-
         } else {
-
-            throw new Exception\Forbidden('Requested uri (' . $uri . ') is out of base uri (' . $this->getBaseUri() . ')');
-
+            throw new Exception\Forbidden('Requested uri ('.$uri.') is out of base uri ('.$this->getBaseUri().')');
         }
-
     }
 
     /**
-     * Returns the HTTP depth header
+     * Returns the HTTP depth header.
      *
      * This method returns the contents of the HTTP depth request header. If the depth header was 'infinity' it will return the Sabre\DAV\Server::DEPTH_INFINITY object
      * It is possible to supply a default depth value, which is used when the depth header has invalid content, or is completely non-existent
      *
      * @param mixed $default
+     *
      * @return int
      */
-    function getHTTPDepth($default = self::DEPTH_INFINITY) {
-
+    public function getHTTPDepth($default = self::DEPTH_INFINITY)
+    {
         // If its not set, we'll grab the default
         $depth = $this->httpRequest->getHeader('Depth');
 
-        if (is_null($depth)) return $default;
-
-        if ($depth == 'infinity') return self::DEPTH_INFINITY;
+        if (is_null($depth)) {
+            return $default;
+        }
 
+        if ('infinity' == $depth) {
+            return self::DEPTH_INFINITY;
+        }
 
         // If its an unknown value. we'll grab the default
-        if (!ctype_digit($depth)) return $default;
-
-        return (int)$depth;
+        if (!ctype_digit($depth)) {
+            return $default;
+        }
 
+        return (int) $depth;
     }
 
     /**
-     * Returns the HTTP range header
+     * Returns the HTTP range header.
      *
      * This method returns null if there is no well-formed HTTP range request
      * header or array($start, $end).
@@ -629,24 +612,29 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * If the second offset is null, it should be treated as the offset of the last byte of the entity
      * If the first offset is null, the second offset should be used to retrieve the last x bytes of the entity
      *
-     * @return array|null
+     * @return int[]|null
      */
-    function getHTTPRange() {
-
+    public function getHTTPRange()
+    {
         $range = $this->httpRequest->getHeader('range');
-        if (is_null($range)) return null;
+        if (is_null($range)) {
+            return null;
+        }
 
         // Matching "Range: bytes=1234-5678: both numbers are optional
 
-        if (!preg_match('/^bytes=([0-9]*)-([0-9]*)$/i', $range, $matches)) return null;
+        if (!preg_match('/^bytes=([0-9]*)-([0-9]*)$/i', $range, $matches)) {
+            return null;
+        }
 
-        if ($matches[1] === '' && $matches[2] === '') return null;
+        if ('' === $matches[1] && '' === $matches[2]) {
+            return null;
+        }
 
         return [
-            $matches[1] !== '' ? $matches[1] : null,
-            $matches[2] !== '' ? $matches[2] : null,
+            '' !== $matches[1] ? (int) $matches[1] : null,
+            '' !== $matches[2] ? (int) $matches[2] : null,
         ];
-
     }
 
     /**
@@ -675,8 +663,8 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *
      * @return array
      */
-    function getHTTPPrefer() {
-
+    public function getHTTPPrefer()
+    {
         $result = [
             // can be true or false
             'respond-async' => false,
@@ -689,23 +677,19 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         ];
 
         if ($prefer = $this->httpRequest->getHeader('Prefer')) {
-
             $result = array_merge(
                 $result,
                 HTTP\parsePrefer($prefer)
             );
-
-        } elseif ($this->httpRequest->getHeader('Brief') == 't') {
+        } elseif ('t' == $this->httpRequest->getHeader('Brief')) {
             $result['return'] = 'minimal';
         }
 
         return $result;
-
     }
 
-
     /**
-     * Returns information about Copy and Move requests
+     * Returns information about Copy and Move requests.
      *
      * This function is created to help getting information about the source and the destination for the
      * WebDAV MOVE and COPY HTTP request. It also validates a lot of information and throws proper exceptions
@@ -715,74 +699,82 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *   * destinationExists - Whether or not the destination is an existing url (and should therefore be overwritten)
      *
      * @param RequestInterface $request
-     * @throws Exception\BadRequest upon missing or broken request headers
+     *
+     * @throws Exception\BadRequest           upon missing or broken request headers
      * @throws Exception\UnsupportedMediaType when trying to copy into a
-     *         non-collection.
-     * @throws Exception\PreconditionFailed If overwrite is set to false, but
-     *         the destination exists.
-     * @throws Exception\Forbidden when source and destination paths are
-     *         identical.
-     * @throws Exception\Conflict When trying to copy a node into its own
-     *         subtree.
+     *                                        non-collection
+     * @throws Exception\PreconditionFailed   if overwrite is set to false, but
+     *                                        the destination exists
+     * @throws Exception\Forbidden            when source and destination paths are
+     *                                        identical
+     * @throws Exception\Conflict             when trying to copy a node into its own
+     *                                        subtree
+     *
      * @return array
      */
-    function getCopyAndMoveInfo(RequestInterface $request) {
-
+    public function getCopyAndMoveInfo(RequestInterface $request)
+    {
         // Collecting the relevant HTTP headers
-        if (!$request->getHeader('Destination')) throw new Exception\BadRequest('The destination header was not supplied');
+        if (!$request->getHeader('Destination')) {
+            throw new Exception\BadRequest('The destination header was not supplied');
+        }
         $destination = $this->calculateUri($request->getHeader('Destination'));
         $overwrite = $request->getHeader('Overwrite');
-        if (!$overwrite) $overwrite = 'T';
-        if (strtoupper($overwrite) == 'T') $overwrite = true;
-        elseif (strtoupper($overwrite) == 'F') $overwrite = false;
+        if (!$overwrite) {
+            $overwrite = 'T';
+        }
+        if ('T' == strtoupper($overwrite)) {
+            $overwrite = true;
+        } elseif ('F' == strtoupper($overwrite)) {
+            $overwrite = false;
+        }
         // We need to throw a bad request exception, if the header was invalid
-        else throw new Exception\BadRequest('The HTTP Overwrite header should be either T or F');
-
-        list($destinationDir) = URLUtil::splitPath($destination);
+        else {
+            throw new Exception\BadRequest('The HTTP Overwrite header should be either T or F');
+        }
+        list($destinationDir) = Uri\split($destination);
 
         try {
             $destinationParent = $this->tree->getNodeForPath($destinationDir);
-            if (!($destinationParent instanceof ICollection)) throw new Exception\UnsupportedMediaType('The destination node is not a collection');
+            if (!($destinationParent instanceof ICollection)) {
+                throw new Exception\UnsupportedMediaType('The destination node is not a collection');
+            }
         } catch (Exception\NotFound $e) {
-
             // If the destination parent node is not found, we throw a 409
             throw new Exception\Conflict('The destination node is not found');
         }
 
         try {
-
             $destinationNode = $this->tree->getNodeForPath($destination);
 
             // If this succeeded, it means the destination already exists
             // we'll need to throw precondition failed in case overwrite is false
-            if (!$overwrite) throw new Exception\PreconditionFailed('The destination node already exists, and the overwrite header is set to false', 'Overwrite');
-
+            if (!$overwrite) {
+                throw new Exception\PreconditionFailed('The destination node already exists, and the overwrite header is set to false', 'Overwrite');
+            }
         } catch (Exception\NotFound $e) {
-
             // Destination didn't exist, we're all good
             $destinationNode = false;
-
         }
 
         $requestPath = $request->getPath();
         if ($destination === $requestPath) {
             throw new Exception\Forbidden('Source and destination uri are identical.');
         }
-        if (substr($destination, 0, strlen($requestPath) + 1) === $requestPath . '/') {
+        if (substr($destination, 0, strlen($requestPath) + 1) === $requestPath.'/') {
             throw new Exception\Conflict('The destination may not be part of the same subtree as the source path.');
         }
 
         // These are the three relevant properties we need to return
         return [
-            'destination'       => $destination,
-            'destinationExists' => !!$destinationNode,
-            'destinationNode'   => $destinationNode,
+            'destination' => $destination,
+            'destinationExists' => (bool) $destinationNode,
+            'destinationNode' => $destinationNode,
         ];
-
     }
 
     /**
-     * Returns a list of properties for a path
+     * Returns a list of properties for a path.
      *
      * This is a simplified version getPropertiesForPath. If you aren't
      * interested in status codes, but you just want to have a flat list of
@@ -793,18 +785,18 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * returned.
      *
      * @param string $path
-     * @param array $propertyNames
+     * @param array  $propertyNames
+     *
      * @return array
      */
-    function getProperties($path, $propertyNames) {
-
+    public function getProperties($path, $propertyNames)
+    {
         $result = $this->getPropertiesForPath($path, $propertyNames, 0);
         if (isset($result[0][200])) {
             return $result[0][200];
         } else {
             return [];
         }
-
     }
 
     /**
@@ -816,26 +808,27 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * The parent node will not be returned.
      *
      * @param string $path
-     * @param array $propertyNames
+     * @param array  $propertyNames
+     *
      * @return array
      */
-    function getPropertiesForChildren($path, $propertyNames) {
-
+    public function getPropertiesForChildren($path, $propertyNames)
+    {
         $result = [];
         foreach ($this->getPropertiesForPath($path, $propertyNames, 1) as $k => $row) {
-
             // Skipping the parent path
-            if ($k === 0) continue;
+            if (0 === $k) {
+                continue;
+            }
 
             $result[$row['href']] = $row[200];
-
         }
-        return $result;
 
+        return $result;
     }
 
     /**
-     * Returns a list of HTTP headers for a particular resource
+     * Returns a list of HTTP headers for a particular resource.
      *
      * The generated http headers are based on properties provided by the
      * resource. The method basically provides a simple mapping between
@@ -844,61 +837,64 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * The headers are intended to be used for HEAD and GET requests.
      *
      * @param string $path
+     *
      * @return array
      */
-    function getHTTPHeaders($path) {
-
+    public function getHTTPHeaders($path)
+    {
         $propertyMap = [
-            '{DAV:}getcontenttype'   => 'Content-Type',
+            '{DAV:}getcontenttype' => 'Content-Type',
             '{DAV:}getcontentlength' => 'Content-Length',
-            '{DAV:}getlastmodified'  => 'Last-Modified',
-            '{DAV:}getetag'          => 'ETag',
+            '{DAV:}getlastmodified' => 'Last-Modified',
+            '{DAV:}getetag' => 'ETag',
         ];
 
         $properties = $this->getProperties($path, array_keys($propertyMap));
 
         $headers = [];
         foreach ($propertyMap as $property => $header) {
-            if (!isset($properties[$property])) continue;
+            if (!isset($properties[$property])) {
+                continue;
+            }
 
             if (is_scalar($properties[$property])) {
                 $headers[$header] = $properties[$property];
 
             // GetLastModified gets special cased
             } elseif ($properties[$property] instanceof Xml\Property\GetLastModified) {
-                $headers[$header] = HTTP\Util::toHTTPDate($properties[$property]->getTime());
+                $headers[$header] = HTTP\toDate($properties[$property]->getTime());
             }
-
         }
 
         return $headers;
-
     }
 
     /**
      * Small helper to support PROPFIND with DEPTH_INFINITY.
      *
      * @param PropFind $propFind
-     * @param array $yieldFirst
-     * @return \Iterator
+     * @param array    $yieldFirst
+     *
+     * @return \Traversable
      */
-    private function generatePathNodes(PropFind $propFind, array $yieldFirst = null) {
-        if ($yieldFirst !== null) {
+    private function generatePathNodes(PropFind $propFind, array $yieldFirst = null)
+    {
+        if (null !== $yieldFirst) {
             yield $yieldFirst;
         }
         $newDepth = $propFind->getDepth();
         $path = $propFind->getPath();
 
-        if ($newDepth !== self::DEPTH_INFINITY) {
-            $newDepth--;
+        if (self::DEPTH_INFINITY !== $newDepth) {
+            --$newDepth;
         }
 
         $propertyNames = $propFind->getRequestedProperties();
         $propFindType = !empty($propertyNames) ? PropFind::NORMAL : PropFind::ALLPROPS;
 
         foreach ($this->tree->getChildren($path) as $childNode) {
-            if ($path !== '') {
-                $subPath = $path . '/' . $childNode->getName();
+            if ('' !== $path) {
+                $subPath = $path.'/'.$childNode->getName();
             } else {
                 $subPath = $childNode->getName();
             }
@@ -906,20 +902,19 @@ class Server extends EventEmitter implements LoggerAwareInterface {
 
             yield [
                 $subPropFind,
-                $childNode
+                $childNode,
             ];
 
-            if (($newDepth === self::DEPTH_INFINITY || $newDepth >= 1) && $childNode instanceof ICollection) {
+            if ((self::DEPTH_INFINITY === $newDepth || $newDepth >= 1) && $childNode instanceof ICollection) {
                 foreach ($this->generatePathNodes($subPropFind) as $subItem) {
                     yield $subItem;
                 }
             }
-
         }
     }
 
     /**
-     * Returns a list of properties for a given path
+     * Returns a list of properties for a given path.
      *
      * The path that should be supplied should have the baseUrl stripped out
      * The list of properties should be supplied in Clark notation. If the list is empty
@@ -928,20 +923,21 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * If a depth of 1 is requested child elements will also be returned.
      *
      * @param string $path
-     * @param array $propertyNames
-     * @param int $depth
+     * @param array  $propertyNames
+     * @param int    $depth
+     *
      * @return array
      *
      * @deprecated Use getPropertiesIteratorForPath() instead (as it's more memory efficient)
      * @see getPropertiesIteratorForPath()
      */
-    function getPropertiesForPath($path, $propertyNames = [], $depth = 0) {
-
+    public function getPropertiesForPath($path, $propertyNames = [], $depth = 0)
+    {
         return iterator_to_array($this->getPropertiesIteratorForPath($path, $propertyNames, $depth));
-
     }
+
     /**
-     * Returns a list of properties for a given path
+     * Returns a list of properties for a given path.
      *
      * The path that should be supplied should have the baseUrl stripped out
      * The list of properties should be supplied in Clark notation. If the list is empty
@@ -950,33 +946,35 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * If a depth of 1 is requested child elements will also be returned.
      *
      * @param string $path
-     * @param array $propertyNames
-     * @param int $depth
+     * @param array  $propertyNames
+     * @param int    $depth
+     *
      * @return \Iterator
      */
-    function getPropertiesIteratorForPath($path, $propertyNames = [], $depth = 0) {
-
+    public function getPropertiesIteratorForPath($path, $propertyNames = [], $depth = 0)
+    {
         // The only two options for the depth of a propfind is 0 or 1 - as long as depth infinity is not enabled
-        if (!$this->enablePropfindDepthInfinity && $depth != 0) $depth = 1;
+        if (!$this->enablePropfindDepthInfinity && 0 != $depth) {
+            $depth = 1;
+        }
 
         $path = trim($path, '/');
 
         $propFindType = $propertyNames ? PropFind::NORMAL : PropFind::ALLPROPS;
-        $propFind = new PropFind($path, (array)$propertyNames, $depth, $propFindType);
+        $propFind = new PropFind($path, (array) $propertyNames, $depth, $propFindType);
 
         $parentNode = $this->tree->getNodeForPath($path);
 
         $propFindRequests = [[
             $propFind,
-            $parentNode
+            $parentNode,
         ]];
 
-        if (($depth > 0 || $depth === self::DEPTH_INFINITY) && $parentNode instanceof ICollection) {
+        if (($depth > 0 || self::DEPTH_INFINITY === $depth) && $parentNode instanceof ICollection) {
             $propFindRequests = $this->generatePathNodes(clone $propFind, current($propFindRequests));
         }
 
         foreach ($propFindRequests as $propFindRequest) {
-
             list($propFind, $node) = $propFindRequest;
             $r = $this->getPropertiesByNode($propFind, $node);
             if ($r) {
@@ -993,9 +991,7 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                 }
                 yield $result;
             }
-
         }
-
     }
 
     /**
@@ -1010,17 +1006,17 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      *
      * @param array $paths
      * @param array $propertyNames
+     *
      * @return array
      */
-    function getPropertiesForMultiplePaths(array $paths, array $propertyNames = []) {
-
+    public function getPropertiesForMultiplePaths(array $paths, array $propertyNames = [])
+    {
         $result = [
         ];
 
         $nodes = $this->tree->getMultipleNodes($paths);
 
         foreach ($nodes as $path => $node) {
-
             $propFind = new PropFind($path, $propertyNames);
             $r = $this->getPropertiesByNode($propFind, $node);
             if ($r) {
@@ -1032,14 +1028,11 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                     $result[$path]['href'] .= '/';
                 }
             }
-
         }
 
         return $result;
-
     }
 
-
     /**
      * Determines all properties for a node.
      *
@@ -1051,13 +1044,13 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * list of properties.
      *
      * @param PropFind $propFind
-     * @param INode $node
+     * @param INode    $node
+     *
      * @return bool
      */
-    function getPropertiesByNode(PropFind $propFind, INode $node) {
-
+    public function getPropertiesByNode(PropFind $propFind, INode $node)
+    {
         return $this->emit('propFind', [$propFind, $node]);
-
     }
 
     /**
@@ -1072,13 +1065,16 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * @param string   $uri
      * @param resource $data
      * @param string   $etag
+     *
      * @return bool
      */
-    function createFile($uri, $data, &$etag = null) {
+    public function createFile($uri, $data, &$etag = null)
+    {
+        list($dir, $name) = Uri\split($uri);
 
-        list($dir, $name) = URLUtil::splitPath($uri);
-
-        if (!$this->emit('beforeBind', [$uri])) return false;
+        if (!$this->emit('beforeBind', [$uri])) {
+            return false;
+        }
 
         $parent = $this->tree->getNodeForPath($dir);
         if (!$parent instanceof ICollection) {
@@ -1091,13 +1087,17 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         //
         // If $modified is true, we must not send back an ETag.
         $modified = false;
-        if (!$this->emit('beforeCreateFile', [$uri, &$data, $parent, &$modified])) return false;
+        if (!$this->emit('beforeCreateFile', [$uri, &$data, $parent, &$modified])) {
+            return false;
+        }
 
         $etag = $parent->createFile($name, $data);
 
-        if ($modified) $etag = null;
+        if ($modified) {
+            $etag = null;
+        }
 
-        $this->tree->markDirty($dir . '/' . $name);
+        $this->tree->markDirty($dir.'/'.$name);
 
         $this->emit('afterBind', [$uri]);
         $this->emit('afterCreateFile', [$uri, $parent]);
@@ -1113,10 +1113,11 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * @param string   $uri
      * @param resource $data
      * @param string   $etag
+     *
      * @return bool
      */
-    function updateFile($uri, $data, &$etag = null) {
-
+    public function updateFile($uri, $data, &$etag = null)
+    {
         $node = $this->tree->getNodeForPath($uri);
 
         // It is possible for an event handler to modify the content of the
@@ -1125,47 +1126,46 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         //
         // If $modified is true, we must not send back an ETag.
         $modified = false;
-        if (!$this->emit('beforeWriteContent', [$uri, $node, &$data, &$modified])) return false;
+        if (!$this->emit('beforeWriteContent', [$uri, $node, &$data, &$modified])) {
+            return false;
+        }
 
         $etag = $node->put($data);
-        if ($modified) $etag = null;
+        if ($modified) {
+            $etag = null;
+        }
         $this->emit('afterWriteContent', [$uri, $node]);
 
         return true;
     }
 
-
-
     /**
      * This method is invoked by sub-systems creating a new directory.
      *
      * @param string $uri
-     * @return void
      */
-    function createDirectory($uri) {
-
+    public function createDirectory($uri)
+    {
         $this->createCollection($uri, new MkCol(['{DAV:}collection'], []));
-
     }
 
     /**
-     * Use this method to create a new collection
+     * Use this method to create a new collection.
+     *
+     * @param string $uri   The new uri
+     * @param MkCol  $mkCol
      *
-     * @param string $uri The new uri
-     * @param MkCol $mkCol
      * @return array|null
      */
-    function createCollection($uri, MkCol $mkCol) {
-
-        list($parentUri, $newName) = URLUtil::splitPath($uri);
+    public function createCollection($uri, MkCol $mkCol)
+    {
+        list($parentUri, $newName) = Uri\split($uri);
 
         // Making sure the parent exists
         try {
             $parent = $this->tree->getNodeForPath($parentUri);
-
         } catch (Exception\NotFound $e) {
             throw new Exception\Conflict('Parent node does not exist');
-
         }
 
         // Making sure the parent is a collection
@@ -1179,26 +1179,23 @@ class Server extends EventEmitter implements LoggerAwareInterface {
 
             // If we got here.. it means there's already a node on that url, and we need to throw a 405
             throw new Exception\MethodNotAllowed('The resource you tried to create already exists');
-
         } catch (Exception\NotFound $e) {
             // NotFound is the expected behavior.
         }
 
-
-        if (!$this->emit('beforeBind', [$uri])) return;
+        if (!$this->emit('beforeBind', [$uri])) {
+            return;
+        }
 
         if ($parent instanceof IExtendedCollection) {
-
-            /**
+            /*
              * If the parent is an instance of IExtendedCollection, it means that
              * we can pass the MkCol object directly as it may be able to store
              * properties immediately.
              */
             $parent->createExtendedCollection($newName, $mkCol);
-
         } else {
-
-            /**
+            /*
              * If the parent is a standard ICollection, it means only
              * 'standard' collections can be created, so we should fail any
              * MKCOL operation that carries extra resourcetypes.
@@ -1208,7 +1205,6 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             }
 
             $parent->createDirectory($newName);
-
         }
 
         // If there are any properties that have not been handled/stored,
@@ -1227,23 +1223,21 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             ];
 
             foreach ($result as $propertyName => $status) {
-
                 if (!isset($formattedResult[$status])) {
                     $formattedResult[$status] = [];
                 }
                 $formattedResult[$status][$propertyName] = null;
-
             }
+
             return $formattedResult;
         }
 
         $this->tree->markDirty($parentUri);
         $this->emit('afterBind', [$uri]);
-
     }
 
     /**
-     * This method updates a resource's properties
+     * This method updates a resource's properties.
      *
      * The properties array must be a list of properties. Array-keys are
      * property names in clarknotation, array-values are it's values.
@@ -1256,17 +1250,17 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * as their values.
      *
      * @param string $path
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return array
      */
-    function updateProperties($path, array $properties) {
-
+    public function updateProperties($path, array $properties)
+    {
         $propPatch = new PropPatch($properties);
         $this->emit('propPatch', [$path, $propPatch]);
         $propPatch->commit();
 
         return $propPatch->getResult();
-
     }
 
     /**
@@ -1287,19 +1281,19 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * related to If-None-Match, If-Match and If-Unmodified Since. It will
      * set the status to 304 Not Modified for If-Modified_since.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function checkPreconditions(RequestInterface $request, ResponseInterface $response) {
-
+    public function checkPreconditions(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
         $node = null;
         $lastMod = null;
         $etag = null;
 
         if ($ifMatch = $request->getHeader('If-Match')) {
-
             // If-Match contains an entity tag. Only if the entity-tag
             // matches we are allowed to make the request succeed.
             // If the entity-tag is '*' we are only allowed to make the
@@ -1311,13 +1305,11 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             }
 
             // Only need to check entity tags if they are not *
-            if ($ifMatch !== '*') {
-
+            if ('*' !== $ifMatch) {
                 // There can be multiple ETags
                 $ifMatch = explode(',', $ifMatch);
                 $haveMatch = false;
                 foreach ($ifMatch as $ifMatchItem) {
-
                     // Stripping any extra spaces
                     $ifMatchItem = trim($ifMatchItem, ' ');
 
@@ -1331,17 +1323,17 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                             $haveMatch = true;
                         }
                     }
-
                 }
                 if (!$haveMatch) {
-                    if ($etag) $response->setHeader('ETag', $etag);
-                     throw new Exception\PreconditionFailed('An If-Match header was specified, but none of the specified the ETags matched.', 'If-Match');
+                    if ($etag) {
+                        $response->setHeader('ETag', $etag);
+                    }
+                    throw new Exception\PreconditionFailed('An If-Match header was specified, but none of the specified ETags matched.', 'If-Match');
                 }
             }
         }
 
         if ($ifNoneMatch = $request->getHeader('If-None-Match')) {
-
             // The If-None-Match header contains an ETag.
             // Only if the ETag does not match the current ETag, the request will succeed
             // The header can also contain *, in which case the request
@@ -1356,46 +1348,46 @@ class Server extends EventEmitter implements LoggerAwareInterface {
             }
             if ($nodeExists) {
                 $haveMatch = false;
-                if ($ifNoneMatch === '*') $haveMatch = true;
-                else {
-
+                if ('*' === $ifNoneMatch) {
+                    $haveMatch = true;
+                } else {
                     // There might be multiple ETags
                     $ifNoneMatch = explode(',', $ifNoneMatch);
                     $etag = $node instanceof IFile ? $node->getETag() : null;
 
                     foreach ($ifNoneMatch as $ifNoneMatchItem) {
-
                         // Stripping any extra spaces
                         $ifNoneMatchItem = trim($ifNoneMatchItem, ' ');
 
-                        if ($etag === $ifNoneMatchItem) $haveMatch = true;
-
+                        if ($etag === $ifNoneMatchItem) {
+                            $haveMatch = true;
+                        }
                     }
-
                 }
 
                 if ($haveMatch) {
-                    if ($etag) $response->setHeader('ETag', $etag);
-                    if ($request->getMethod() === 'GET') {
+                    if ($etag) {
+                        $response->setHeader('ETag', $etag);
+                    }
+                    if ('GET' === $request->getMethod()) {
                         $response->setStatus(304);
+
                         return false;
                     } else {
                         throw new Exception\PreconditionFailed('An If-None-Match header was specified, but the ETag matched (or * was specified).', 'If-None-Match');
                     }
                 }
             }
-
         }
 
         if (!$ifNoneMatch && ($ifModifiedSince = $request->getHeader('If-Modified-Since'))) {
-
             // The If-Modified-Since header contains a date. We
             // will only return the entity if it has been changed since
             // that date. If it hasn't been changed, we return a 304
             // header
             // Note that this header only has to be checked if there was no If-None-Match header
             // as per the HTTP spec.
-            $date = HTTP\Util::parseHTTPDate($ifModifiedSince);
+            $date = HTTP\parseDate($ifModifiedSince);
 
             if ($date) {
                 if (is_null($node)) {
@@ -1403,10 +1395,11 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                 }
                 $lastMod = $node->getLastModified();
                 if ($lastMod) {
-                    $lastMod = new \DateTime('@' . $lastMod);
+                    $lastMod = new \DateTime('@'.$lastMod);
                     if ($lastMod <= $date) {
                         $response->setStatus(304);
-                        $response->setHeader('Last-Modified', HTTP\Util::toHTTPDate($lastMod));
+                        $response->setHeader('Last-Modified', HTTP\toDate($lastMod));
+
                         return false;
                     }
                 }
@@ -1414,10 +1407,9 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         }
 
         if ($ifUnmodifiedSince = $request->getHeader('If-Unmodified-Since')) {
-
             // The If-Unmodified-Since will allow allow the request if the
             // entity has not changed since the specified date.
-            $date = HTTP\Util::parseHTTPDate($ifUnmodifiedSince);
+            $date = HTTP\parseDate($ifUnmodifiedSince);
 
             // We must only check the date if it's valid
             if ($date) {
@@ -1426,13 +1418,12 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                 }
                 $lastMod = $node->getLastModified();
                 if ($lastMod) {
-                    $lastMod = new \DateTime('@' . $lastMod);
+                    $lastMod = new \DateTime('@'.$lastMod);
                     if ($lastMod > $date) {
                         throw new Exception\PreconditionFailed('An If-Unmodified-Since header was specified, but the entity has been changed since the specified date.', 'If-Unmodified-Since');
                     }
                 }
             }
-
         }
 
         // Now the hardest, the If: header. The If: header can contain multiple
@@ -1461,13 +1452,11 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         // Every ifCondition needs to validate to true, so we exit as soon as
         // we have an invalid condition.
         foreach ($ifConditions as $ifCondition) {
-
             $uri = $ifCondition['uri'];
             $tokens = $ifCondition['tokens'];
 
             // We only need 1 valid token for the condition to succeed.
             foreach ($tokens as $token) {
-
                 $tokenValid = $token['validToken'] || !$token['token'];
 
                 $etagValid = false;
@@ -1477,35 +1466,28 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                 // Checking the ETag, only if the token was already deemed
                 // valid and there is one.
                 if ($token['etag'] && $tokenValid) {
-
                     // The token was valid, and there was an ETag. We must
                     // grab the current ETag and check it.
                     $node = $this->tree->getNodeForPath($uri);
                     $etagValid = $node instanceof IFile && $node->getETag() == $token['etag'];
-
                 }
 
-
                 if (($tokenValid && $etagValid) ^ $token['negate']) {
                     // Both were valid, so we can go to the next condition.
                     continue 2;
                 }
-
-
             }
 
             // If we ended here, it means there was no valid ETag + token
             // combination found for the current condition. This means we fail!
-            throw new Exception\PreconditionFailed('Failed to find a valid token/etag combination for ' . $uri, 'If');
-
+            throw new Exception\PreconditionFailed('Failed to find a valid token/etag combination for '.$uri, 'If');
         }
 
         return true;
-
     }
 
     /**
-     * This method is created to extract information from the WebDAV HTTP 'If:' header
+     * This method is created to extract information from the WebDAV HTTP 'If:' header.
      *
      * The If header can be quite complex, and has a bunch of features. We're using a regex to extract all relevant information
      * The function will return an array, containing structs with the following keys
@@ -1573,12 +1555,15 @@ class Server extends EventEmitter implements LoggerAwareInterface {
      * ]
      *
      * @param RequestInterface $request
+     *
      * @return array
      */
-    function getIfConditions(RequestInterface $request) {
-
+    public function getIfConditions(RequestInterface $request)
+    {
         $header = $request->getHeader('If');
-        if (!$header) return [];
+        if (!$header) {
+            return [];
+        }
 
         $matches = [];
 
@@ -1588,18 +1573,16 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         $conditions = [];
 
         foreach ($matches as $match) {
-
             // If there was no uri specified in this match, and there were
             // already conditions parsed, we add the condition to the list of
             // conditions for the previous uri.
             if (!$match['uri'] && count($conditions)) {
                 $conditions[count($conditions) - 1]['tokens'][] = [
                     'negate' => $match['not'] ? true : false,
-                    'token'  => $match['token'],
-                    'etag'   => isset($match['etag']) ? $match['etag'] : ''
+                    'token' => $match['token'],
+                    'etag' => isset($match['etag']) ? $match['etag'] : '',
                 ];
             } else {
-
                 if (!$match['uri']) {
                     $realUri = $request->getPath();
                 } else {
@@ -1607,55 +1590,55 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                 }
 
                 $conditions[] = [
-                    'uri'    => $realUri,
+                    'uri' => $realUri,
                     'tokens' => [
                         [
                             'negate' => $match['not'] ? true : false,
-                            'token'  => $match['token'],
-                            'etag'   => isset($match['etag']) ? $match['etag'] : ''
-                        ]
+                            'token' => $match['token'],
+                            'etag' => isset($match['etag']) ? $match['etag'] : '',
+                        ],
                     ],
-
                 ];
             }
-
         }
 
         return $conditions;
-
     }
 
     /**
      * Returns an array with resourcetypes for a node.
      *
      * @param INode $node
+     *
      * @return array
      */
-    function getResourceTypeForNode(INode $node) {
-
+    public function getResourceTypeForNode(INode $node)
+    {
         $result = [];
         foreach ($this->resourceTypeMapping as $className => $resourceType) {
-            if ($node instanceof $className) $result[] = $resourceType;
+            if ($node instanceof $className) {
+                $result[] = $resourceType;
+            }
         }
-        return $result;
 
+        return $result;
     }
 
     // }}}
     // {{{ XML Readers & Writers
 
-
     /**
      * Generates a WebDAV propfind response body based on a list of nodes.
      *
      * If 'strip404s' is set to true, all 404 responses will be removed.
      *
      * @param array|\Traversable $fileProperties The list with nodes
-     * @param bool $strip404s
+     * @param bool               $strip404s
+     *
      * @return string
      */
-    function generateMultiStatus($fileProperties, $strip404s = false) {
-
+    public function generateMultiStatus($fileProperties, $strip404s = false)
+    {
         $w = $this->xml->getWriter();
         $w->openMemory();
         $w->contextUri = $this->baseUri;
@@ -1664,7 +1647,6 @@ class Server extends EventEmitter implements LoggerAwareInterface {
         $w->startElement('{DAV:}multistatus');
 
         foreach ($fileProperties as $entry) {
-
             $href = $entry['href'];
             unset($entry['href']);
             if ($strip404s) {
@@ -1675,14 +1657,12 @@ class Server extends EventEmitter implements LoggerAwareInterface {
                 $entry
             );
             $w->write([
-                'name'  => '{DAV:}response',
-                'value' => $response
+                'name' => '{DAV:}response',
+                'value' => $response,
             ]);
         }
         $w->endElement();
 
         return $w->outputMemory();
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/ServerPlugin.php b/vendor/sabre/dav/lib/DAV/ServerPlugin.php
index b2c468ab3..9aefa7f72 100644
--- a/vendor/sabre/dav/lib/DAV/ServerPlugin.php
+++ b/vendor/sabre/dav/lib/DAV/ServerPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
@@ -11,8 +13,8 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class ServerPlugin {
-
+abstract class ServerPlugin
+{
     /**
      * This initializes the plugin.
      *
@@ -22,9 +24,8 @@ abstract class ServerPlugin {
      * This method should set up the required event subscriptions.
      *
      * @param Server $server
-     * @return void
      */
-    abstract function initialize(Server $server);
+    abstract public function initialize(Server $server);
 
     /**
      * This method should return a list of server-features.
@@ -34,10 +35,9 @@ abstract class ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return [];
-
     }
 
     /**
@@ -48,12 +48,12 @@ abstract class ServerPlugin {
      * available for the specified uri.
      *
      * @param string $path
+     *
      * @return array
      */
-    function getHTTPMethods($path) {
-
+    public function getHTTPMethods($path)
+    {
         return [];
-
     }
 
     /**
@@ -64,10 +64,9 @@ abstract class ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return get_class($this);
-
     }
 
     /**
@@ -78,12 +77,12 @@ abstract class ServerPlugin {
      * implement them
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getSupportedReportSet($uri) {
-
+    public function getSupportedReportSet($uri)
+    {
         return [];
-
     }
 
     /**
@@ -97,14 +96,12 @@ abstract class ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => null,
-            'link'        => null,
+            'link' => null,
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Sharing/ISharedNode.php b/vendor/sabre/dav/lib/DAV/Sharing/ISharedNode.php
index 034aefbdc..a746ac753 100644
--- a/vendor/sabre/dav/lib/DAV/Sharing/ISharedNode.php
+++ b/vendor/sabre/dav/lib/DAV/Sharing/ISharedNode.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Sharing;
 
 use Sabre\DAV\INode;
@@ -13,8 +15,8 @@ use Sabre\DAV\INode;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ISharedNode extends INode {
-
+interface ISharedNode extends INode
+{
     /**
      * Returns the 'access level' for the instance of this shared resource.
      *
@@ -23,7 +25,7 @@ interface ISharedNode extends INode {
      *
      * @return int
      */
-    function getShareAccess();
+    public function getShareAccess();
 
     /**
      * This function must return a URI that uniquely identifies the shared
@@ -36,7 +38,7 @@ interface ISharedNode extends INode {
      *
      * @return string
      */
-    function getShareResourceUri();
+    public function getShareResourceUri();
 
     /**
      * Updates the list of sharees.
@@ -44,9 +46,8 @@ interface ISharedNode extends INode {
      * Every item must be a Sharee object.
      *
      * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
-     * @return void
      */
-    function updateInvites(array $sharees);
+    public function updateInvites(array $sharees);
 
     /**
      * Returns the list of people whom this resource is shared with.
@@ -64,6 +65,5 @@ interface ISharedNode extends INode {
      *
      * @return \Sabre\DAV\Xml\Element\Sharee[]
      */
-    function getInvites();
-
+    public function getInvites();
 }
diff --git a/vendor/sabre/dav/lib/DAV/Sharing/Plugin.php b/vendor/sabre/dav/lib/DAV/Sharing/Plugin.php
index ef5702c57..5706fabf1 100644
--- a/vendor/sabre/dav/lib/DAV/Sharing/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Sharing/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Sharing;
 
 use Sabre\DAV\Exception\BadRequest;
@@ -14,7 +16,7 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * This plugin implements HTTP requests and properties related to:
+ * This plugin implements HTTP requests and properties related to:.
  *
  * draft-pot-webdav-resource-sharing
  *
@@ -24,8 +26,8 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends ServerPlugin {
-
+class Plugin extends ServerPlugin
+{
     const ACCESS_NOTSHARED = 0;
     const ACCESS_SHAREDOWNER = 1;
     const ACCESS_READ = 2;
@@ -52,10 +54,9 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['resource-sharing'];
-
     }
 
     /**
@@ -66,10 +67,9 @@ class Plugin extends ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'sharing';
-
     }
 
     /**
@@ -81,10 +81,9 @@ class Plugin extends ServerPlugin {
      * This method should set up the required event subscriptions.
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
+    public function initialize(Server $server)
+    {
         $this->server = $server;
 
         $server->xml->elementMap['{DAV:}share-resource'] = 'Sabre\\DAV\\Xml\\Request\\ShareResource';
@@ -94,12 +93,11 @@ class Plugin extends ServerPlugin {
             '{DAV:}share-mode'
         );
 
-        $server->on('method:POST',              [$this, 'httpPost']);
-        $server->on('propFind',                 [$this, 'propFind']);
+        $server->on('method:POST', [$this, 'httpPost']);
+        $server->on('propFind', [$this, 'propFind']);
         $server->on('getSupportedPrivilegeSet', [$this, 'getSupportedPrivilegeSet']);
-        $server->on('onHTMLActionsPanel',       [$this, 'htmlActionsPanel']);
-        $server->on('onBrowserPostAction',      [$this, 'browserPostAction']);
-
+        $server->on('onHTMLActionsPanel', [$this, 'htmlActionsPanel']);
+        $server->on('onBrowserPostAction', [$this, 'browserPostAction']);
     }
 
     /**
@@ -108,18 +106,15 @@ class Plugin extends ServerPlugin {
      * The sharees  array is a list of people that are to be added modified
      * or removed in the list of shares.
      *
-     * @param string $path
+     * @param string   $path
      * @param Sharee[] $sharees
-     * @return void
      */
-    function shareResource($path, array $sharees) {
-
+    public function shareResource($path, array $sharees)
+    {
         $node = $this->server->tree->getNodeForPath($path);
 
         if (!$node instanceof ISharedNode) {
-
             throw new Forbidden('Sharing is not allowed on this node');
-
         }
 
         // Getting ACL info
@@ -138,7 +133,6 @@ class Plugin extends ServerPlugin {
             $sharee->principal = $principal;
         }
         $node->updateInvites($sharees);
-
     }
 
     /**
@@ -147,47 +141,41 @@ class Plugin extends ServerPlugin {
      * This allows us to inject any sharings-specific properties.
      *
      * @param PropFind $propFind
-     * @param INode $node
-     * @return void
+     * @param INode    $node
      */
-    function propFind(PropFind $propFind, INode $node) {
-
+    public function propFind(PropFind $propFind, INode $node)
+    {
         if ($node instanceof ISharedNode) {
-
-            $propFind->handle('{DAV:}share-access', function() use ($node) {
-
+            $propFind->handle('{DAV:}share-access', function () use ($node) {
                 return new Property\ShareAccess($node->getShareAccess());
-
             });
-            $propFind->handle('{DAV:}invite', function() use ($node) {
-
+            $propFind->handle('{DAV:}invite', function () use ($node) {
                 return new Property\Invite($node->getInvites());
-
             });
-            $propFind->handle('{DAV:}share-resource-uri', function() use ($node) {
-
+            $propFind->handle('{DAV:}share-resource-uri', function () use ($node) {
                 return new Property\Href($node->getShareResourceUri());
-
             });
-
         }
-
     }
 
     /**
-     * We intercept this to handle POST requests on shared resources
+     * We intercept this to handle POST requests on shared resources.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return null|bool
+     *
+     * @return bool|null
      */
-    function httpPost(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpPost(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
         $contentType = $request->getHeader('Content-Type');
+        if (null === $contentType) {
+            return;
+        }
 
         // We're only interested in the davsharing content type.
-        if (strpos($contentType, 'application/davsharing+xml') === false) {
+        if (false === strpos($contentType, 'application/davsharing+xml')) {
             return;
         }
 
@@ -198,7 +186,6 @@ class Plugin extends ServerPlugin {
         );
 
         switch ($documentType) {
-
             case '{DAV:}share-resource':
 
                 $this->shareResource($path, $message->sharees);
@@ -210,11 +197,9 @@ class Plugin extends ServerPlugin {
                 // Breaking the event chain
                 return false;
 
-            default :
-                throw new BadRequest('Unexpected document type: ' . $documentType . ' for this Content-Type');
-
+            default:
+                throw new BadRequest('Unexpected document type: '.$documentType.' for this Content-Type');
         }
-
     }
 
     /**
@@ -226,11 +211,11 @@ class Plugin extends ServerPlugin {
      * @param INode $node
      * @param array $supportedPrivilegeSet
      */
-    function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet) {
-
+    public function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet)
+    {
         if ($node instanceof ISharedNode) {
             $supportedPrivilegeSet['{DAV:}share'] = [
-                'abstract'   => false,
+                'abstract' => false,
                 'aggregates' => [],
             ];
         }
@@ -247,27 +232,27 @@ class Plugin extends ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'This plugin implements WebDAV resource sharing',
-            'link'        => 'https://github.com/evert/webdav-sharing'
+            'link' => 'https://github.com/evert/webdav-sharing',
         ];
-
     }
 
     /**
      * This method is used to generate HTML output for the
      * DAV\Browser\Plugin.
      *
-     * @param INode $node
+     * @param INode  $node
      * @param string $output
      * @param string $path
+     *
      * @return bool|null
      */
-    function htmlActionsPanel(INode $node, &$output, $path) {
-
+    public function htmlActionsPanel(INode $node, &$output, $path)
+    {
         if (!$node instanceof ISharedNode) {
             return;
         }
@@ -293,7 +278,6 @@ class Plugin extends ServerPlugin {
              <input type="submit" value="share" />
             </form>
             </td></tr>';
-
     }
 
     /**
@@ -302,11 +286,11 @@ class Plugin extends ServerPlugin {
      *
      * @param string $path
      * @param string $action
-     * @param array $postVars
+     * @param array  $postVars
      */
-    function browserPostAction($path, $action, $postVars) {
-
-        if ($action !== 'share') {
+    public function browserPostAction($path, $action, $postVars)
+    {
+        if ('share' !== $action) {
             return;
         }
 
@@ -319,7 +303,7 @@ class Plugin extends ServerPlugin {
 
         $accessMap = [
             'readwrite' => self::ACCESS_READWRITE,
-            'read'      => self::ACCESS_READ,
+            'read' => self::ACCESS_READ,
             'no-access' => self::ACCESS_NOACCESS,
         ];
 
@@ -327,7 +311,7 @@ class Plugin extends ServerPlugin {
             throw new BadRequest('The "access" POST must be readwrite, read or no-access');
         }
         $sharee = new Sharee([
-            'href'   => $postVars['href'],
+            'href' => $postVars['href'],
             'access' => $accessMap[$postVars['access']],
         ]);
 
@@ -335,8 +319,7 @@ class Plugin extends ServerPlugin {
             $path,
             [$sharee]
         );
-        return false;
 
+        return false;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/SimpleCollection.php b/vendor/sabre/dav/lib/DAV/SimpleCollection.php
index 998cfcbff..1fbb6982d 100644
--- a/vendor/sabre/dav/lib/DAV/SimpleCollection.php
+++ b/vendor/sabre/dav/lib/DAV/SimpleCollection.php
@@ -1,9 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
+use InvalidArgumentException;
+
 /**
- * SimpleCollection
+ * SimpleCollection.
  *
  * The SimpleCollection is used to quickly setup static directory structures.
  * Just create the object with a proper name, and add children to use it.
@@ -12,64 +16,64 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SimpleCollection extends Collection {
-
+class SimpleCollection extends Collection
+{
     /**
-     * List of childnodes
+     * List of childnodes.
      *
      * @var INode[]
      */
     protected $children = [];
 
     /**
-     * Name of this resource
+     * Name of this resource.
      *
      * @var string
      */
     protected $name;
 
     /**
-     * Creates this node
+     * Creates this node.
      *
      * The name of the node must be passed, child nodes can also be passed.
      * This nodes must be instances of INode
      *
-     * @param string $name
+     * @param string  $name
      * @param INode[] $children
      */
-    function __construct($name, array $children = []) {
-
+    public function __construct($name, array $children = [])
+    {
         $this->name = $name;
-        foreach ($children as $child) {
-
-            if (!($child instanceof INode)) throw new Exception('Only instances of Sabre\DAV\INode are allowed to be passed in the children argument');
+        foreach ($children as $key => $child) {
+            if (is_string($child)) {
+                $child = new SimpleFile($key, $child);
+            } elseif (is_array($child)) {
+                $child = new self($key, $child);
+            } elseif (!$child instanceof INode) {
+                throw new InvalidArgumentException('Children must be specified as strings, arrays or instances of Sabre\DAV\INode');
+            }
             $this->addChild($child);
-
         }
-
     }
 
     /**
-     * Adds a new childnode to this collection
+     * Adds a new childnode to this collection.
      *
      * @param INode $child
-     * @return void
      */
-    function addChild(INode $child) {
-
+    public function addChild(INode $child)
+    {
         $this->children[$child->getName()] = $child;
-
     }
 
     /**
-     * Returns the name of the collection
+     * Returns the name of the collection.
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->name;
-
     }
 
     /**
@@ -82,26 +86,26 @@ class SimpleCollection extends Collection {
      * exist.
      *
      * @param string $name
+     *
      * @throws Exception\NotFound
+     *
      * @return INode
      */
-    function getChild($name) {
-
-        if (isset($this->children[$name])) return $this->children[$name];
-        throw new Exception\NotFound('File not found: ' . $name . ' in \'' . $this->getName() . '\'');
-
+    public function getChild($name)
+    {
+        if (isset($this->children[$name])) {
+            return $this->children[$name];
+        }
+        throw new Exception\NotFound('File not found: '.$name.' in \''.$this->getName().'\'');
     }
 
     /**
-     * Returns a list of children for this collection
+     * Returns a list of children for this collection.
      *
      * @return INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         return array_values($this->children);
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/SimpleFile.php b/vendor/sabre/dav/lib/DAV/SimpleFile.php
index bcad786f3..ca808b672 100644
--- a/vendor/sabre/dav/lib/DAV/SimpleFile.php
+++ b/vendor/sabre/dav/lib/DAV/SimpleFile.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * SimpleFile
+ * SimpleFile.
  *
  * The 'SimpleFile' class is used to easily add read-only immutable files to
  * the directory structure. One usecase would be to add a 'readme.txt' to a
@@ -13,45 +15,44 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SimpleFile extends File {
-
+class SimpleFile extends File
+{
     /**
-     * File contents
+     * File contents.
      *
      * @var string
      */
     protected $contents = [];
 
     /**
-     * Name of this resource
+     * Name of this resource.
      *
      * @var string
      */
     protected $name;
 
     /**
-     * A mimetype, such as 'text/plain' or 'text/html'
+     * A mimetype, such as 'text/plain' or 'text/html'.
      *
      * @var string
      */
     protected $mimeType;
 
     /**
-     * Creates this node
+     * Creates this node.
      *
      * The name of the node must be passed, as well as the contents of the
      * file.
      *
-     * @param string $name
-     * @param string $contents
+     * @param string      $name
+     * @param string      $contents
      * @param string|null $mimeType
      */
-    function __construct($name, $contents, $mimeType = null) {
-
+    public function __construct($name, $contents, $mimeType = null)
+    {
         $this->name = $name;
         $this->contents = $contents;
         $this->mimeType = $mimeType;
-
     }
 
     /**
@@ -61,23 +62,21 @@ class SimpleFile extends File {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->name;
-
     }
 
     /**
-     * Returns the data
+     * Returns the data.
      *
      * This method may either return a string or a readable stream resource
      *
      * @return mixed
      */
-    function get() {
-
+    public function get()
+    {
         return $this->contents;
-
     }
 
     /**
@@ -85,37 +84,35 @@ class SimpleFile extends File {
      *
      * @return int
      */
-    function getSize() {
-
+    public function getSize()
+    {
         return strlen($this->contents);
-
     }
 
     /**
-     * Returns the ETag for a file
+     * Returns the ETag for a file.
      *
      * An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
      * The ETag is an arbitrary string, but MUST be surrounded by double-quotes.
      *
      * Return null if the ETag can not effectively be determined
+     *
      * @return string
      */
-    function getETag() {
-
-        return '"' . sha1($this->contents) . '"';
-
+    public function getETag()
+    {
+        return '"'.sha1($this->contents).'"';
     }
 
     /**
-     * Returns the mime-type for a file
+     * Returns the mime-type for a file.
      *
      * If null is returned, we'll assume application/octet-stream
+     *
      * @return string
      */
-    function getContentType() {
-
+    public function getContentType()
+    {
         return $this->mimeType;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/StringUtil.php b/vendor/sabre/dav/lib/DAV/StringUtil.php
index 10eecebfd..13a4399e3 100644
--- a/vendor/sabre/dav/lib/DAV/StringUtil.php
+++ b/vendor/sabre/dav/lib/DAV/StringUtil.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * String utility
+ * String utility.
  *
  * This class is mainly used to implement the 'text-match' filter, used by both
  * the CalDAV calendar-query REPORT, and CardDAV addressbook-query REPORT.
@@ -13,79 +15,74 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class StringUtil {
-
+class StringUtil
+{
     /**
-     * Checks if a needle occurs in a haystack ;)
+     * Checks if a needle occurs in a haystack ;).
      *
      * @param string $haystack
      * @param string $needle
      * @param string $collation
      * @param string $matchType
+     *
      * @return bool
      */
-    static function textMatch($haystack, $needle, $collation, $matchType = 'contains') {
-
+    public static function textMatch($haystack, $needle, $collation, $matchType = 'contains')
+    {
         switch ($collation) {
-
-            case 'i;ascii-casemap' :
+            case 'i;ascii-casemap':
                 // default strtolower takes locale into consideration
                 // we don't want this.
                 $haystack = str_replace(range('a', 'z'), range('A', 'Z'), $haystack);
                 $needle = str_replace(range('a', 'z'), range('A', 'Z'), $needle);
                 break;
 
-            case 'i;octet' :
+            case 'i;octet':
                 // Do nothing
                 break;
 
-            case 'i;unicode-casemap' :
+            case 'i;unicode-casemap':
                 $haystack = mb_strtoupper($haystack, 'UTF-8');
                 $needle = mb_strtoupper($needle, 'UTF-8');
                 break;
 
-            default :
-                throw new Exception\BadRequest('Collation type: ' . $collation . ' is not supported');
-
+            default:
+                throw new Exception\BadRequest('Collation type: '.$collation.' is not supported');
         }
 
         switch ($matchType) {
-
-            case 'contains' :
-                return strpos($haystack, $needle) !== false;
-            case 'equals' :
+            case 'contains':
+                return false !== strpos($haystack, $needle);
+            case 'equals':
                 return $haystack === $needle;
-            case 'starts-with' :
-                return strpos($haystack, $needle) === 0;
-            case 'ends-with' :
+            case 'starts-with':
+                return 0 === strpos($haystack, $needle);
+            case 'ends-with':
                 return strrpos($haystack, $needle) === strlen($haystack) - strlen($needle);
-            default :
-                throw new Exception\BadRequest('Match-type: ' . $matchType . ' is not supported');
-
+            default:
+                throw new Exception\BadRequest('Match-type: '.$matchType.' is not supported');
         }
-
     }
 
     /**
      * This method takes an input string, checks if it's not valid UTF-8 and
      * attempts to convert it to UTF-8 if it's not.
      *
-     * Note that currently this can only convert ISO-8559-1 to UTF-8 (latin-1),
+     * Note that currently this can only convert ISO-8859-1 to UTF-8 (latin-1),
      * anything else will likely fail.
      *
      * @param string $input
+     *
      * @return string
      */
-    static function ensureUTF8($input) {
-
+    public static function ensureUTF8($input)
+    {
         $encoding = mb_detect_encoding($input, ['UTF-8', 'ISO-8859-1'], true);
 
-        if ($encoding === 'ISO-8859-1') {
+        if ('ISO-8859-1' === $encoding) {
             return utf8_encode($input);
         } else {
             return $input;
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Sync/ISyncCollection.php b/vendor/sabre/dav/lib/DAV/Sync/ISyncCollection.php
index d3dc28a80..4ca69dc89 100644
--- a/vendor/sabre/dav/lib/DAV/Sync/ISyncCollection.php
+++ b/vendor/sabre/dav/lib/DAV/Sync/ISyncCollection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Sync;
 
 use Sabre\DAV;
@@ -15,8 +17,8 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ISyncCollection extends DAV\ICollection {
-
+interface ISyncCollection extends DAV\ICollection
+{
     /**
      * This method returns the current sync-token for this collection.
      * This can be any string.
@@ -26,7 +28,7 @@ interface ISyncCollection extends DAV\ICollection {
      *
      * @return string|null
      */
-    function getSyncToken();
+    public function getSyncToken();
 
     /**
      * The getChanges method returns all the changes that have happened, since
@@ -79,10 +81,10 @@ interface ISyncCollection extends DAV\ICollection {
      * The limit is 'suggestive'. You are free to ignore it.
      *
      * @param string $syncToken
-     * @param int $syncLevel
-     * @param int $limit
+     * @param int    $syncLevel
+     * @param int    $limit
+     *
      * @return array
      */
-    function getChanges($syncToken, $syncLevel, $limit = null);
-
+    public function getChanges($syncToken, $syncLevel, $limit = null);
 }
diff --git a/vendor/sabre/dav/lib/DAV/Sync/Plugin.php b/vendor/sabre/dav/lib/DAV/Sync/Plugin.php
index 8e4b1aa64..f76827fe3 100644
--- a/vendor/sabre/dav/lib/DAV/Sync/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Sync/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Sync;
 
 use Sabre\DAV;
@@ -18,10 +20,10 @@ use Sabre\HTTP\RequestInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     /**
-     * Reference to server object
+     * Reference to server object.
      *
      * @var DAV\Server
      */
@@ -37,10 +39,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'sync';
-
     }
 
     /**
@@ -49,28 +50,25 @@ class Plugin extends DAV\ServerPlugin {
      * This is when the plugin registers it's hooks.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         $this->server = $server;
         $server->xml->elementMap['{DAV:}sync-collection'] = 'Sabre\\DAV\\Xml\\Request\\SyncCollectionReport';
 
         $self = $this;
 
-        $server->on('report', function($reportName, $dom, $uri) use ($self) {
-
-            if ($reportName === '{DAV:}sync-collection') {
+        $server->on('report', function ($reportName, $dom, $uri) use ($self) {
+            if ('{DAV:}sync-collection' === $reportName) {
                 $this->server->transactionType = 'report-sync-collection';
                 $self->syncCollection($uri, $dom);
+
                 return false;
             }
-
         });
 
-        $server->on('propFind',       [$this, 'propFind']);
+        $server->on('propFind', [$this, 'propFind']);
         $server->on('validateTokens', [$this, 'validateTokens']);
-
     }
 
     /**
@@ -81,10 +79,11 @@ class Plugin extends DAV\ServerPlugin {
      * implement them
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getSupportedReportSet($uri) {
-
+    public function getSupportedReportSet($uri)
+    {
         $node = $this->server->tree->getNodeForPath($uri);
         if ($node instanceof ISyncCollection && $node->getSyncToken()) {
             return [
@@ -93,19 +92,16 @@ class Plugin extends DAV\ServerPlugin {
         }
 
         return [];
-
     }
 
-
     /**
      * This method handles the {DAV:}sync-collection HTTP REPORT.
      *
-     * @param string $uri
+     * @param string               $uri
      * @param SyncCollectionReport $report
-     * @return void
      */
-    function syncCollection($uri, SyncCollectionReport $report) {
-
+    public function syncCollection($uri, SyncCollectionReport $report)
+    {
         // Getting the data
         $node = $this->server->tree->getNodeForPath($uri);
         if (!$node instanceof ISyncCollection) {
@@ -119,19 +115,16 @@ class Plugin extends DAV\ServerPlugin {
         $syncToken = $report->syncToken;
         if (!is_null($syncToken)) {
             // Sync-token must start with our prefix
-            if (substr($syncToken, 0, strlen(self::SYNCTOKEN_PREFIX)) !== self::SYNCTOKEN_PREFIX) {
+            if (self::SYNCTOKEN_PREFIX !== substr($syncToken, 0, strlen(self::SYNCTOKEN_PREFIX))) {
                 throw new DAV\Exception\InvalidSyncToken('Invalid or unknown sync token');
             }
 
             $syncToken = substr($syncToken, strlen(self::SYNCTOKEN_PREFIX));
-
         }
         $changeInfo = $node->getChanges($syncToken, $report->syncLevel, $report->limit);
 
         if (is_null($changeInfo)) {
-
             throw new DAV\Exception\InvalidSyncToken('Invalid or unknown sync token');
-
         }
 
         // Encoding the response
@@ -143,7 +136,6 @@ class Plugin extends DAV\ServerPlugin {
             $changeInfo['deleted'],
             $report->properties
         );
-
     }
 
     /**
@@ -151,50 +143,41 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @param string $syncToken
      * @param string $collectionUrl
-     * @param array $added
-     * @param array $modified
-     * @param array $deleted
-     * @param array $properties
-     * @return void
+     * @param array  $added
+     * @param array  $modified
+     * @param array  $deleted
+     * @param array  $properties
      */
-    protected function sendSyncCollectionResponse($syncToken, $collectionUrl, array $added, array $modified, array $deleted, array $properties) {
-
-
+    protected function sendSyncCollectionResponse($syncToken, $collectionUrl, array $added, array $modified, array $deleted, array $properties)
+    {
         $fullPaths = [];
 
         // Pre-fetching children, if this is possible.
         foreach (array_merge($added, $modified) as $item) {
-            $fullPath = $collectionUrl . '/' . $item;
+            $fullPath = $collectionUrl.'/'.$item;
             $fullPaths[] = $fullPath;
         }
 
         $responses = [];
         foreach ($this->server->getPropertiesForMultiplePaths($fullPaths, $properties) as $fullPath => $props) {
-
             // The 'Property_Response' class is responsible for generating a
             // single {DAV:}response xml element.
             $responses[] = new DAV\Xml\Element\Response($fullPath, $props);
-
         }
 
-
-
         // Deleted items also show up as 'responses'. They have no properties,
         // and a single {DAV:}status element set as 'HTTP/1.1 404 Not Found'.
         foreach ($deleted as $item) {
-
-            $fullPath = $collectionUrl . '/' . $item;
+            $fullPath = $collectionUrl.'/'.$item;
             $responses[] = new DAV\Xml\Element\Response($fullPath, [], 404);
-
         }
-        $multiStatus = new DAV\Xml\Response\MultiStatus($responses, self::SYNCTOKEN_PREFIX . $syncToken);
+        $multiStatus = new DAV\Xml\Response\MultiStatus($responses, self::SYNCTOKEN_PREFIX.$syncToken);
 
         $this->server->httpResponse->setStatus(207);
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setBody(
             $this->server->xml->write('{DAV:}multistatus', $multiStatus, $this->server->getBaseUri())
         );
-
     }
 
     /**
@@ -202,18 +185,17 @@ class Plugin extends DAV\ServerPlugin {
      * We intercept this to see if we must return a {DAV:}sync-token.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
-     * @return void
+     * @param DAV\INode    $node
      */
-    function propFind(DAV\PropFind $propFind, DAV\INode $node) {
-
-        $propFind->handle('{DAV:}sync-token', function() use ($node) {
+    public function propFind(DAV\PropFind $propFind, DAV\INode $node)
+    {
+        $propFind->handle('{DAV:}sync-token', function () use ($node) {
             if (!$node instanceof ISyncCollection || !$token = $node->getSyncToken()) {
                 return;
             }
-            return self::SYNCTOKEN_PREFIX . $token;
-        });
 
+            return self::SYNCTOKEN_PREFIX.$token;
+        });
     }
 
     /**
@@ -223,17 +205,14 @@ class Plugin extends DAV\ServerPlugin {
      * in the If: header, and check if they are valid.
      *
      * @param RequestInterface $request
-     * @param array $conditions
-     * @return void
+     * @param array            $conditions
      */
-    function validateTokens(RequestInterface $request, &$conditions) {
-
+    public function validateTokens(RequestInterface $request, &$conditions)
+    {
         foreach ($conditions as $kk => $condition) {
-
             foreach ($condition['tokens'] as $ii => $token) {
-
                 // Sync-tokens must always start with our designated prefix.
-                if (substr($token['token'], 0, strlen(self::SYNCTOKEN_PREFIX)) !== self::SYNCTOKEN_PREFIX) {
+                if (self::SYNCTOKEN_PREFIX !== substr($token['token'], 0, strlen(self::SYNCTOKEN_PREFIX))) {
                     continue;
                 }
 
@@ -246,11 +225,8 @@ class Plugin extends DAV\ServerPlugin {
                 ) {
                     $conditions[$kk]['tokens'][$ii]['validToken'] = true;
                 }
-
             }
-
         }
-
     }
 
     /**
@@ -264,14 +240,12 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds support for WebDAV Collection Sync (rfc6578)',
-            'link'        => 'http://sabre.io/dav/sync/',
+            'link' => 'http://sabre.io/dav/sync/',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/TemporaryFileFilterPlugin.php b/vendor/sabre/dav/lib/DAV/TemporaryFileFilterPlugin.php
index 7b453d105..6cf772f44 100644
--- a/vendor/sabre/dav/lib/DAV/TemporaryFileFilterPlugin.php
+++ b/vendor/sabre/dav/lib/DAV/TemporaryFileFilterPlugin.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
- * Temporary File Filter Plugin
+ * Temporary File Filter Plugin.
  *
  * The purpose of this filter is to intercept some of the garbage files
  * operation systems and applications tend to generate when mounting
@@ -30,8 +32,8 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class TemporaryFileFilterPlugin extends ServerPlugin {
-
+class TemporaryFileFilterPlugin extends ServerPlugin
+{
     /**
      * This is the list of patterns we intercept.
      * If new patterns are added, they must be valid patterns for preg_match.
@@ -49,7 +51,7 @@ class TemporaryFileFilterPlugin extends ServerPlugin {
     ];
 
     /**
-     * A reference to the main Server class
+     * A reference to the main Server class.
      *
      * @var \Sabre\DAV\Server
      */
@@ -72,58 +74,61 @@ class TemporaryFileFilterPlugin extends ServerPlugin {
      *
      * @param string|null $dataDir
      */
-    function __construct($dataDir = null) {
-
-        if (!$dataDir) $dataDir = ini_get('session.save_path') . '/sabredav/';
-        if (!is_dir($dataDir)) mkdir($dataDir);
+    public function __construct($dataDir = null)
+    {
+        if (!$dataDir) {
+            $dataDir = ini_get('session.save_path').'/sabredav/';
+        }
+        if (!is_dir($dataDir)) {
+            mkdir($dataDir);
+        }
         $this->dataDir = $dataDir;
-
     }
 
     /**
-     * Initialize the plugin
+     * Initialize the plugin.
      *
      * This is called automatically be the Server class after this plugin is
      * added with Sabre\DAV\Server::addPlugin()
      *
      * @param Server $server
-     * @return void
      */
-    function initialize(Server $server) {
-
+    public function initialize(Server $server)
+    {
         $this->server = $server;
-        $server->on('beforeMethod',    [$this, 'beforeMethod']);
+        $server->on('beforeMethod:*', [$this, 'beforeMethod']);
         $server->on('beforeCreateFile', [$this, 'beforeCreateFile']);
-
     }
 
     /**
-     * This method is called before any HTTP method handler
+     * This method is called before any HTTP method handler.
      *
      * This method intercepts any GET, DELETE, PUT and PROPFIND calls to
      * filenames that are known to match the 'temporary file' regex.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function beforeMethod(RequestInterface $request, ResponseInterface $response) {
-
-        if (!$tempLocation = $this->isTempFile($request->getPath()))
+    public function beforeMethod(RequestInterface $request, ResponseInterface $response)
+    {
+        if (!$tempLocation = $this->isTempFile($request->getPath())) {
             return;
+        }
 
         switch ($request->getMethod()) {
-            case 'GET' :
+            case 'GET':
                 return $this->httpGet($request, $response, $tempLocation);
-            case 'PUT' :
+            case 'PUT':
                 return $this->httpPut($request, $response, $tempLocation);
-            case 'PROPFIND' :
+            case 'PROPFIND':
                 return $this->httpPropfind($request, $response, $tempLocation);
-            case 'DELETE' :
+            case 'DELETE':
                 return $this->httpDelete($request, $response, $tempLocation);
         }
-        return;
 
+        return;
     }
 
     /**
@@ -132,24 +137,25 @@ class TemporaryFileFilterPlugin extends ServerPlugin {
      * This is used to deal with HTTP LOCK requests which create a new
      * file.
      *
-     * @param string $uri
-     * @param resource $data
+     * @param string      $uri
+     * @param resource    $data
      * @param ICollection $parent
-     * @param bool $modified Should be set to true, if this event handler
-     *                       changed &$data.
+     * @param bool        $modified should be set to true, if this event handler
+     *                              changed &$data
+     *
      * @return bool
      */
-    function beforeCreateFile($uri, $data, ICollection $parent, $modified) {
-
+    public function beforeCreateFile($uri, $data, ICollection $parent, $modified)
+    {
         if ($tempPath = $this->isTempFile($uri)) {
-
             $hR = $this->server->httpResponse;
             $hR->setHeader('X-Sabre-Temp', 'true');
             file_put_contents($tempPath, $data);
+
             return false;
         }
-        return;
 
+        return;
     }
 
     /**
@@ -158,71 +164,76 @@ class TemporaryFileFilterPlugin extends ServerPlugin {
      * temporary file storage.
      *
      * @param string $path
+     *
      * @return bool|string
      */
-    protected function isTempFile($path) {
-
+    protected function isTempFile($path)
+    {
         // We're only interested in the basename.
-        list(, $tempPath) = URLUtil::splitPath($path);
+        list(, $tempPath) = Uri\split($path);
 
-        foreach ($this->temporaryFilePatterns as $tempFile) {
+        if (null === $tempPath) {
+            return false;
+        }
 
+        foreach ($this->temporaryFilePatterns as $tempFile) {
             if (preg_match($tempFile, $tempPath)) {
-                return $this->getDataDir() . '/sabredav_' . md5($path) . '.tempfile';
+                return $this->getDataDir().'/sabredav_'.md5($path).'.tempfile';
             }
-
         }
 
         return false;
-
     }
 
-
     /**
      * This method handles the GET method for temporary files.
      * If the file doesn't exist, it will return false which will kick in
      * the regular system for the GET method.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $hR
-     * @param string $tempLocation
+     * @param string            $tempLocation
+     *
      * @return bool
      */
-    function httpGet(RequestInterface $request, ResponseInterface $hR, $tempLocation) {
-
-        if (!file_exists($tempLocation)) return;
+    public function httpGet(RequestInterface $request, ResponseInterface $hR, $tempLocation)
+    {
+        if (!file_exists($tempLocation)) {
+            return;
+        }
 
         $hR->setHeader('Content-Type', 'application/octet-stream');
         $hR->setHeader('Content-Length', filesize($tempLocation));
         $hR->setHeader('X-Sabre-Temp', 'true');
         $hR->setStatus(200);
         $hR->setBody(fopen($tempLocation, 'r'));
-        return false;
 
+        return false;
     }
 
     /**
      * This method handles the PUT method.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $hR
-     * @param string $tempLocation
+     * @param string            $tempLocation
+     *
      * @return bool
      */
-    function httpPut(RequestInterface $request, ResponseInterface $hR, $tempLocation) {
-
+    public function httpPut(RequestInterface $request, ResponseInterface $hR, $tempLocation)
+    {
         $hR->setHeader('X-Sabre-Temp', 'true');
 
         $newFile = !file_exists($tempLocation);
 
         if (!$newFile && ($this->server->httpRequest->getHeader('If-None-Match'))) {
-             throw new Exception\PreconditionFailed('The resource already exists, and an If-None-Match header was supplied');
+            throw new Exception\PreconditionFailed('The resource already exists, and an If-None-Match header was supplied');
         }
 
         file_put_contents($tempLocation, $this->server->httpRequest->getBody());
         $hR->setStatus($newFile ? 201 : 200);
-        return false;
 
+        return false;
     }
 
     /**
@@ -231,20 +242,23 @@ class TemporaryFileFilterPlugin extends ServerPlugin {
      * If the file didn't exist, it will return false, which will make the
      * standard HTTP DELETE handler kick in.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $hR
-     * @param string $tempLocation
+     * @param string            $tempLocation
+     *
      * @return bool
      */
-    function httpDelete(RequestInterface $request, ResponseInterface $hR, $tempLocation) {
-
-        if (!file_exists($tempLocation)) return;
+    public function httpDelete(RequestInterface $request, ResponseInterface $hR, $tempLocation)
+    {
+        if (!file_exists($tempLocation)) {
+            return;
+        }
 
         unlink($tempLocation);
         $hR->setHeader('X-Sabre-Temp', 'true');
         $hR->setStatus(204);
-        return false;
 
+        return false;
     }
 
     /**
@@ -254,14 +268,17 @@ class TemporaryFileFilterPlugin extends ServerPlugin {
      * for which properties were requested, and just sends back a default
      * set of properties.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $hR
-     * @param string $tempLocation
+     * @param string            $tempLocation
+     *
      * @return bool
      */
-    function httpPropfind(RequestInterface $request, ResponseInterface $hR, $tempLocation) {
-
-        if (!file_exists($tempLocation)) return;
+    public function httpPropfind(RequestInterface $request, ResponseInterface $hR, $tempLocation)
+    {
+        if (!file_exists($tempLocation)) {
+            return;
+        }
 
         $hR->setHeader('X-Sabre-Temp', 'true');
         $hR->setStatus(207);
@@ -269,22 +286,20 @@ class TemporaryFileFilterPlugin extends ServerPlugin {
 
         $properties = [
             'href' => $request->getPath(),
-            200    => [
-                '{DAV:}getlastmodified'                 => new Xml\Property\GetLastModified(filemtime($tempLocation)),
-                '{DAV:}getcontentlength'                => filesize($tempLocation),
-                '{DAV:}resourcetype'                    => new Xml\Property\ResourceType(null),
-                '{' . Server::NS_SABREDAV . '}tempFile' => true,
-
+            200 => [
+                '{DAV:}getlastmodified' => new Xml\Property\GetLastModified(filemtime($tempLocation)),
+                '{DAV:}getcontentlength' => filesize($tempLocation),
+                '{DAV:}resourcetype' => new Xml\Property\ResourceType(null),
+                '{'.Server::NS_SABREDAV.'}tempFile' => true,
             ],
         ];
 
         $data = $this->server->generateMultiStatus([$properties]);
         $hR->setBody($data);
-        return false;
 
+        return false;
     }
 
-
     /**
      * This method returns the directory where the temporary files should be stored.
      *
diff --git a/vendor/sabre/dav/lib/DAV/Tree.php b/vendor/sabre/dav/lib/DAV/Tree.php
index 7c04f0915..7a5a25f87 100644
--- a/vendor/sabre/dav/lib/DAV/Tree.php
+++ b/vendor/sabre/dav/lib/DAV/Tree.php
@@ -1,8 +1,10 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
  * The tree object is responsible for basic tree operations.
@@ -14,10 +16,10 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Tree {
-
+class Tree
+{
     /**
-     * The root node
+     * The root node.
      *
      * @var ICollection
      */
@@ -32,28 +34,30 @@ class Tree {
     protected $cache = [];
 
     /**
-     * Creates the object
+     * Creates the object.
      *
      * This method expects the rootObject to be passed as a parameter
      *
      * @param ICollection $rootNode
      */
-    function __construct(ICollection $rootNode) {
-
+    public function __construct(ICollection $rootNode)
+    {
         $this->rootNode = $rootNode;
-
     }
 
     /**
-     * Returns the INode object for the requested path
+     * Returns the INode object for the requested path.
      *
      * @param string $path
+     *
      * @return INode
      */
-    function getNodeForPath($path) {
-
+    public function getNodeForPath($path)
+    {
         $path = trim($path, '/');
-        if (isset($this->cache[$path])) return $this->cache[$path];
+        if (isset($this->cache[$path])) {
+            return $this->cache[$path];
+        }
 
         // Is it the root node?
         if (!strlen($path)) {
@@ -61,25 +65,24 @@ class Tree {
         }
 
         // Attempting to fetch its parent
-        list($parentName, $baseName) = URLUtil::splitPath($path);
+        list($parentName, $baseName) = Uri\split($path);
 
         // If there was no parent, we must simply ask it from the root node.
-        if ($parentName === "") {
+        if ('' === $parentName) {
             $node = $this->rootNode->getChild($baseName);
         } else {
             // Otherwise, we recursively grab the parent and ask him/her.
             $parent = $this->getNodeForPath($parentName);
 
-            if (!($parent instanceof ICollection))
-                throw new Exception\NotFound('Could not find node at path: ' . $path);
-
+            if (!($parent instanceof ICollection)) {
+                throw new Exception\NotFound('Could not find node at path: '.$path);
+            }
             $node = $parent->getChild($baseName);
-
         }
 
         $this->cache[$path] = $node;
-        return $node;
 
+        return $node;
     }
 
     /**
@@ -89,61 +92,64 @@ class Tree {
      * it cheaper.
      *
      * @param string $path
+     *
      * @return bool
      */
-    function nodeExists($path) {
-
+    public function nodeExists($path)
+    {
         try {
-
             // The root always exists
-            if ($path === '') return true;
+            if ('' === $path) {
+                return true;
+            }
 
-            list($parent, $base) = URLUtil::splitPath($path);
+            list($parent, $base) = Uri\split($path);
 
             $parentNode = $this->getNodeForPath($parent);
-            if (!$parentNode instanceof ICollection) return false;
-            return $parentNode->childExists($base);
+            if (!$parentNode instanceof ICollection) {
+                return false;
+            }
 
+            return $parentNode->childExists($base);
         } catch (Exception\NotFound $e) {
-
             return false;
-
         }
-
     }
 
     /**
-     * Copies a file from path to another
+     * Copies a file from path to another.
      *
-     * @param string $sourcePath The source location
+     * @param string $sourcePath      The source location
      * @param string $destinationPath The full destination path
-     * @return void
      */
-    function copy($sourcePath, $destinationPath) {
-
+    public function copy($sourcePath, $destinationPath)
+    {
         $sourceNode = $this->getNodeForPath($sourcePath);
 
         // grab the dirname and basename components
-        list($destinationDir, $destinationName) = URLUtil::splitPath($destinationPath);
+        list($destinationDir, $destinationName) = Uri\split($destinationPath);
 
         $destinationParent = $this->getNodeForPath($destinationDir);
-        $this->copyNode($sourceNode, $destinationParent, $destinationName);
+        // Check if the target can handle the copy itself. If not, we do it ourselves.
+        if (!$destinationParent instanceof ICopyTarget || !$destinationParent->copyInto($destinationName, $sourcePath, $sourceNode)) {
+            $this->copyNode($sourceNode, $destinationParent, $destinationName);
+        }
 
         $this->markDirty($destinationDir);
-
     }
 
     /**
-     * Moves a file from one location to another
+     * Moves a file from one location to another.
      *
-     * @param string $sourcePath The path to the file which should be moved
+     * @param string $sourcePath      The path to the file which should be moved
      * @param string $destinationPath The full destination path, so not just the destination parent node
+     *
      * @return int
      */
-    function move($sourcePath, $destinationPath) {
-
-        list($sourceDir) = URLUtil::splitPath($sourcePath);
-        list($destinationDir, $destinationName) = URLUtil::splitPath($destinationPath);
+    public function move($sourcePath, $destinationPath)
+    {
+        list($sourceDir) = Uri\split($sourcePath);
+        list($destinationDir, $destinationName) = Uri\split($destinationPath);
 
         if ($sourceDir === $destinationDir) {
             // If this is a 'local' rename, it means we can just trigger a rename.
@@ -164,49 +170,45 @@ class Tree {
         }
         $this->markDirty($sourceDir);
         $this->markDirty($destinationDir);
-
     }
 
     /**
-     * Deletes a node from the tree
+     * Deletes a node from the tree.
      *
      * @param string $path
-     * @return void
      */
-    function delete($path) {
-
+    public function delete($path)
+    {
         $node = $this->getNodeForPath($path);
         $node->delete();
 
-        list($parent) = URLUtil::splitPath($path);
+        list($parent) = Uri\split($path);
         $this->markDirty($parent);
-
     }
 
     /**
      * Returns a list of childnodes for a given path.
      *
      * @param string $path
-     * @return array
+     *
+     * @return \Traversable
      */
-    function getChildren($path) {
-
+    public function getChildren($path)
+    {
         $node = $this->getNodeForPath($path);
-        $children = $node->getChildren();
         $basePath = trim($path, '/');
-        if ($basePath !== '') $basePath .= '/';
-
-        foreach ($children as $child) {
-
-            $this->cache[$basePath . $child->getName()] = $child;
-
+        if ('' !== $basePath) {
+            $basePath .= '/';
         }
-        return $children;
 
+        foreach ($node->getChildren() as $child) {
+            $this->cache[$basePath.$child->getName()] = $child;
+            yield $child;
+        }
     }
 
     /**
-     * This method is called with every tree update
+     * This method is called with every tree update.
      *
      * Examples of tree updates are:
      *   * node deletions
@@ -221,19 +223,17 @@ class Tree {
      * If a path is passed, it is assumed that the entire subtree is dirty
      *
      * @param string $path
-     * @return void
      */
-    function markDirty($path) {
-
+    public function markDirty($path)
+    {
         // We don't care enough about sub-paths
         // flushing the entire cache
         $path = trim($path, '/');
         foreach ($this->cache as $nodePath => $node) {
-            if ($path === '' || $nodePath == $path || strpos($nodePath, $path . '/') === 0)
+            if ('' === $path || $nodePath == $path || 0 === strpos($nodePath, $path.'/')) {
                 unset($this->cache[$nodePath]);
-
+            }
         }
-
     }
 
     /**
@@ -247,15 +247,16 @@ class Tree {
      * This method returns an array with the found nodes. It's keys are the
      * original paths. The result may be out of order.
      *
-     * @param array $paths List of nodes that must be fetched.
+     * @param array $paths list of nodes that must be fetched
+     *
      * @return array
      */
-    function getMultipleNodes($paths) {
-
+    public function getMultipleNodes($paths)
+    {
         // Finding common parents
         $parents = [];
         foreach ($paths as $path) {
-            list($parent, $node) = URLUtil::splitPath($path);
+            list($parent, $node) = Uri\split($path);
             if (!isset($parents[$parent])) {
                 $parents[$parent] = [$node];
             } else {
@@ -266,44 +267,38 @@ class Tree {
         $result = [];
 
         foreach ($parents as $parent => $children) {
-
             $parentNode = $this->getNodeForPath($parent);
             if ($parentNode instanceof IMultiGet) {
                 foreach ($parentNode->getMultipleChildren($children) as $childNode) {
-                    $fullPath = $parent . '/' . $childNode->getName();
+                    $fullPath = $parent.'/'.$childNode->getName();
                     $result[$fullPath] = $childNode;
                     $this->cache[$fullPath] = $childNode;
                 }
             } else {
                 foreach ($children as $child) {
-                    $fullPath = $parent . '/' . $child;
+                    $fullPath = $parent.'/'.$child;
                     $result[$fullPath] = $this->getNodeForPath($fullPath);
                 }
             }
-
         }
 
         return $result;
-
     }
 
-
     /**
-     * copyNode
+     * copyNode.
      *
-     * @param INode $source
+     * @param INode       $source
      * @param ICollection $destinationParent
-     * @param string $destinationName
-     * @return void
+     * @param string      $destinationName
      */
-    protected function copyNode(INode $source, ICollection $destinationParent, $destinationName = null) {
-
-        if ((string)$destinationName === '') {
+    protected function copyNode(INode $source, ICollection $destinationParent, $destinationName = null)
+    {
+        if ('' === (string) $destinationName) {
             $destinationName = $source->getName();
         }
 
         if ($source instanceof IFile) {
-
             $data = $source->get();
 
             // If the body was a string, we need to convert it to a stream
@@ -315,28 +310,19 @@ class Tree {
             }
             $destinationParent->createFile($destinationName, $data);
             $destination = $destinationParent->getChild($destinationName);
-
         } elseif ($source instanceof ICollection) {
-
             $destinationParent->createDirectory($destinationName);
 
             $destination = $destinationParent->getChild($destinationName);
             foreach ($source->getChildren() as $child) {
-
                 $this->copyNode($child, $destination);
-
             }
-
         }
         if ($source instanceof IProperties && $destination instanceof IProperties) {
-
             $props = $source->getProperties([]);
             $propPatch = new PropPatch($props);
             $destination->propPatch($propPatch);
             $propPatch->commit();
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/UUIDUtil.php b/vendor/sabre/dav/lib/DAV/UUIDUtil.php
index 177adafd3..8c36e1b0b 100644
--- a/vendor/sabre/dav/lib/DAV/UUIDUtil.php
+++ b/vendor/sabre/dav/lib/DAV/UUIDUtil.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
- * UUID Utility
+ * UUID Utility.
  *
  * This class has static methods to generate and validate UUID's.
  * UUIDs are used a decent amount within various *DAV standards, so it made
@@ -13,18 +15,19 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class UUIDUtil {
-
+class UUIDUtil
+{
     /**
-     * Returns a pseudo-random v4 UUID
+     * Returns a pseudo-random v4 UUID.
      *
      * This function is based on a comment by Andrew Moore on php.net
      *
      * @see http://www.php.net/manual/en/function.uniqid.php#94959
+     *
      * @return string
      */
-    static function getUUID() {
-
+    public static function getUUID()
+    {
         return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
             // 32 bits for "time_low"
             mt_rand(0, 0xffff), mt_rand(0, 0xffff),
@@ -50,15 +53,14 @@ class UUIDUtil {
      * Checks if a string is a valid UUID.
      *
      * @param string $uuid
+     *
      * @return bool
      */
-    static function validateUUID($uuid) {
-
-        return preg_match(
+    public static function validateUUID($uuid)
+    {
+        return 0 !== preg_match(
             '/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/i',
             $uuid
-        ) !== 0;
-
+        );
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Version.php b/vendor/sabre/dav/lib/DAV/Version.php
index 89918e5bc..c00255881 100644
--- a/vendor/sabre/dav/lib/DAV/Version.php
+++ b/vendor/sabre/dav/lib/DAV/Version.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 /**
@@ -9,11 +11,10 @@ namespace Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Version {
-
+class Version
+{
     /**
-     * Full version number
+     * Full version number.
      */
-    const VERSION = '3.2.2';
-
+    const VERSION = '4.0.2';
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Element/Prop.php b/vendor/sabre/dav/lib/DAV/Xml/Element/Prop.php
index 71ef03e3f..52a04cf08 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Element/Prop.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Element/Prop.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Element;
 
 use Sabre\DAV\Xml\Property\Complex;
@@ -17,8 +19,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Prop implements XmlDeserializable {
-
+class Prop implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -38,13 +40,15 @@ class Prop implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         // If there's no children, we don't do anything.
         if ($reader->isEmptyElement) {
             $reader->next();
+
             return [];
         }
 
@@ -52,22 +56,17 @@ class Prop implements XmlDeserializable {
 
         $reader->read();
         do {
-
-            if ($reader->nodeType === Reader::ELEMENT) {
-
+            if (Reader::ELEMENT === $reader->nodeType) {
                 $clark = $reader->getClark();
                 $values[$clark] = self::parseCurrentElement($reader)['value'];
-
             } else {
                 $reader->read();
             }
-
-        } while ($reader->nodeType !== Reader::END_ELEMENT);
+        } while (Reader::END_ELEMENT !== $reader->nodeType);
 
         $reader->read();
 
         return $values;
-
     }
 
     /**
@@ -81,10 +80,11 @@ class Prop implements XmlDeserializable {
      *   * value - The parsed value.
      *
      * @param Reader $reader
+     *
      * @return array
      */
-    private static function parseCurrentElement(Reader $reader) {
-
+    private static function parseCurrentElement(Reader $reader)
+    {
         $name = $reader->getClark();
 
         if (array_key_exists($name, $reader->elementMap)) {
@@ -95,22 +95,20 @@ class Prop implements XmlDeserializable {
                 $value = call_user_func($deserializer, $reader);
             } else {
                 $type = gettype($deserializer);
-                if ($type === 'string') {
-                    $type .= ' (' . $deserializer . ')';
-                } elseif ($type === 'object') {
-                    $type .= ' (' . get_class($deserializer) . ')';
+                if ('string' === $type) {
+                    $type .= ' ('.$deserializer.')';
+                } elseif ('object' === $type) {
+                    $type .= ' ('.get_class($deserializer).')';
                 }
-                throw new \LogicException('Could not use this type as a deserializer: ' . $type);
+                throw new \LogicException('Could not use this type as a deserializer: '.$type);
             }
         } else {
             $value = Complex::xmlDeserialize($reader);
         }
 
         return [
-            'name'  => $name,
+            'name' => $name,
             'value' => $value,
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Element/Response.php b/vendor/sabre/dav/lib/DAV/Xml/Element/Response.php
index ce97ae943..a11091809 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Element/Response.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Element/Response.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Element;
 
 use Sabre\Xml\Element;
@@ -7,7 +9,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\Writer;
 
 /**
- * WebDAV {DAV:}response parser
+ * WebDAV {DAV:}response parser.
  *
  * This class parses the {DAV:}response element, as defined in:
  *
@@ -17,17 +19,17 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Response implements Element {
-
+class Response implements Element
+{
     /**
-     * Url for the response
+     * Url for the response.
      *
      * @var string
      */
     protected $href;
 
     /**
-     * Propertylist, ordered by HTTP status code
+     * Propertylist, ordered by HTTP status code.
      *
      * @var array
      */
@@ -57,51 +59,46 @@ class Response implements Element {
      * deleted.
      *
      * @param string $href
-     * @param array $responseProperties
+     * @param array  $responseProperties
      * @param string $httpStatus
      */
-    function __construct($href, array $responseProperties, $httpStatus = null) {
-
+    public function __construct($href, array $responseProperties, $httpStatus = null)
+    {
         $this->href = $href;
         $this->responseProperties = $responseProperties;
         $this->httpStatus = $httpStatus;
-
     }
 
     /**
-     * Returns the url
+     * Returns the url.
      *
      * @return string
      */
-    function getHref() {
-
+    public function getHref()
+    {
         return $this->href;
-
     }
 
     /**
-     * Returns the httpStatus value
+     * Returns the httpStatus value.
      *
      * @return string
      */
-    function getHttpStatus() {
-
+    public function getHttpStatus()
+    {
         return $this->httpStatus;
-
     }
 
     /**
-     * Returns the property list
+     * Returns the property list.
      *
      * @return array
      */
-    function getResponseProperties() {
-
+    public function getResponseProperties()
+    {
         return $this->responseProperties;
-
     }
 
-
     /**
      * The serialize method is called during xml writing.
      *
@@ -115,19 +112,17 @@ class Response implements Element {
      * responsible for closing them.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         if ($status = $this->getHTTPStatus()) {
-            $writer->writeElement('{DAV:}status', 'HTTP/1.1 ' . $status . ' ' . \Sabre\HTTP\Response::$statusCodes[$status]);
+            $writer->writeElement('{DAV:}status', 'HTTP/1.1 '.$status.' '.\Sabre\HTTP\Response::$statusCodes[$status]);
         }
-        $writer->writeElement('{DAV:}href', $writer->contextUri . \Sabre\HTTP\encodePath($this->getHref()));
+        $writer->writeElement('{DAV:}href', $writer->contextUri.\Sabre\HTTP\encodePath($this->getHref()));
 
         $empty = true;
 
         foreach ($this->getResponseProperties() as $status => $properties) {
-
             // Skipping empty lists
             if (!$properties || (!ctype_digit($status) && !is_int($status))) {
                 continue;
@@ -135,9 +130,8 @@ class Response implements Element {
             $empty = false;
             $writer->startElement('{DAV:}propstat');
             $writer->writeElement('{DAV:}prop', $properties);
-            $writer->writeElement('{DAV:}status', 'HTTP/1.1 ' . $status . ' ' . \Sabre\HTTP\Response::$statusCodes[$status]);
+            $writer->writeElement('{DAV:}status', 'HTTP/1.1 '.$status.' '.\Sabre\HTTP\Response::$statusCodes[$status]);
             $writer->endElement(); // {DAV:}propstat
-
         }
         if ($empty) {
             /*
@@ -149,12 +143,10 @@ class Response implements Element {
              * no properties.
              */
             $writer->writeElement('{DAV:}propstat', [
-                '{DAV:}prop'   => [],
-                '{DAV:}status' => 'HTTP/1.1 418 ' . \Sabre\HTTP\Response::$statusCodes[418]
+                '{DAV:}prop' => [],
+                '{DAV:}status' => 'HTTP/1.1 418 '.\Sabre\HTTP\Response::$statusCodes[418],
             ]);
-
         }
-
     }
 
     /**
@@ -176,10 +168,11 @@ class Response implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $reader->pushContext();
 
         $reader->elementMap['{DAV:}propstat'] = 'Sabre\\Xml\\Element\\KeyValue';
@@ -192,16 +185,16 @@ class Response implements Element {
         // called. But we don't want this, because a singular element without
         // child-elements implies 'no value' in {DAV:}prop, so we want to skip
         // deserializers and just set null for those.
-        $reader->elementMap['{DAV:}prop'] = function(Reader $reader) {
-
+        $reader->elementMap['{DAV:}prop'] = function (Reader $reader) {
             if ($reader->isEmptyElement) {
                 $reader->next();
+
                 return [];
             }
             $values = [];
             $reader->read();
             do {
-                if ($reader->nodeType === Reader::ELEMENT) {
+                if (Reader::ELEMENT === $reader->nodeType) {
                     $clark = $reader->getClark();
 
                     if ($reader->isEmptyElement) {
@@ -213,10 +206,10 @@ class Response implements Element {
                 } else {
                     $reader->read();
                 }
-            } while ($reader->nodeType !== Reader::END_ELEMENT);
+            } while (Reader::END_ELEMENT !== $reader->nodeType);
             $reader->read();
-            return $values;
 
+            return $values;
         };
         $elems = $reader->parseInnerTree();
         $reader->popContext();
@@ -226,28 +219,24 @@ class Response implements Element {
         $statusCode = null;
 
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-
-                case '{DAV:}href' :
+                case '{DAV:}href':
                     $href = $elem['value'];
                     break;
-                case '{DAV:}propstat' :
+                case '{DAV:}propstat':
                     $status = $elem['value']['{DAV:}status'];
-                    list(, $status, ) = explode(' ', $status, 3);
+                    list(, $status) = explode(' ', $status, 3);
                     $properties = isset($elem['value']['{DAV:}prop']) ? $elem['value']['{DAV:}prop'] : [];
-                    if ($properties) $propertyLists[$status] = $properties;
+                    if ($properties) {
+                        $propertyLists[$status] = $properties;
+                    }
                     break;
-                case '{DAV:}status' :
-                    list(, $statusCode, ) = explode(' ', $elem['value'], 3);
+                case '{DAV:}status':
+                    list(, $statusCode) = explode(' ', $elem['value'], 3);
                     break;
-
             }
-
         }
 
         return new self($href, $propertyLists, $statusCode);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Element/Sharee.php b/vendor/sabre/dav/lib/DAV/Xml/Element/Sharee.php
index e187bf11c..e0db3bf37 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Element/Sharee.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Element/Sharee.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Element;
 
 use Sabre\DAV\Exception\BadRequest;
@@ -18,8 +20,8 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Sharee implements Element {
-
+class Sharee implements Element
+{
     /**
      * A URL. Usually a mailto: address, could also be a principal url.
      * This uniquely identifies the sharee.
@@ -79,24 +81,21 @@ class Sharee implements Element {
     public $inviteStatus;
 
     /**
-     * Creates the object
+     * Creates the object.
      *
      * $properties will be used to populate all internal properties.
      *
      * @param array $properties
      */
-    function __construct(array $properties = []) {
-
+    public function __construct(array $properties = [])
+    {
         foreach ($properties as $k => $v) {
-
             if (property_exists($this, $k)) {
                 $this->$k = $v;
             } else {
-                throw new \InvalidArgumentException('Unknown property: ' . $k);
+                throw new \InvalidArgumentException('Unknown property: '.$k);
             }
-
         }
-
     }
 
     /**
@@ -116,31 +115,28 @@ class Sharee implements Element {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-
+    public function xmlSerialize(Writer $writer)
+    {
         $writer->write([
             new Href($this->href),
-            '{DAV:}prop'         => $this->properties,
+            '{DAV:}prop' => $this->properties,
             '{DAV:}share-access' => new ShareAccess($this->access),
         ]);
         switch ($this->inviteStatus) {
-            case Plugin::INVITE_NORESPONSE :
+            case Plugin::INVITE_NORESPONSE:
                 $writer->writeElement('{DAV:}invite-noresponse');
                 break;
-            case Plugin::INVITE_ACCEPTED :
+            case Plugin::INVITE_ACCEPTED:
                 $writer->writeElement('{DAV:}invite-accepted');
                 break;
-            case Plugin::INVITE_DECLINED :
+            case Plugin::INVITE_DECLINED:
                 $writer->writeElement('{DAV:}invite-declined');
                 break;
-            case Plugin::INVITE_INVALID :
+            case Plugin::INVITE_INVALID:
                 $writer->writeElement('{DAV:}invite-invalid');
                 break;
         }
-
     }
 
     /**
@@ -162,10 +158,11 @@ class Sharee implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         // Temporarily override configuration
         $reader->pushContext();
         $reader->elementMap['{DAV:}share-access'] = 'Sabre\DAV\Xml\Property\ShareAccess';
@@ -192,8 +189,7 @@ class Sharee implements Element {
             throw new BadRequest('Every {DAV:}sharee must have a {DAV:}share-access child element');
         }
         $sharee->access = $elems['share-access']->getValue();
-        return $sharee;
 
+        return $sharee;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/Complex.php b/vendor/sabre/dav/lib/DAV/Xml/Property/Complex.php
index 258806e4a..990302054 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/Complex.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/Complex.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\Xml\Element\XmlFragment;
@@ -15,8 +17,8 @@ use Sabre\Xml\Reader;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Complex extends XmlFragment {
-
+class Complex extends XmlFragment
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -36,15 +38,17 @@ class Complex extends XmlFragment {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $xml = $reader->readInnerXml();
 
-        if ($reader->nodeType === Reader::ELEMENT && $reader->isEmptyElement) {
+        if (Reader::ELEMENT === $reader->nodeType && $reader->isEmptyElement) {
             // Easy!
             $reader->next();
+
             return null;
         }
         // Now we have a copy of the inner xml, we need to traverse it to get
@@ -56,21 +60,19 @@ class Complex extends XmlFragment {
         $text = '';
 
         while (true) {
-
             switch ($reader->nodeType) {
-                case Reader::ELEMENT :
+                case Reader::ELEMENT:
                     $nonText = true;
                     $reader->next();
                     continue 2;
-                case Reader::TEXT :
-                case Reader::CDATA :
+                case Reader::TEXT:
+                case Reader::CDATA:
                     $text .= $reader->value;
                     break;
-                case Reader::END_ELEMENT :
+                case Reader::END_ELEMENT:
                     break 2;
             }
             $reader->read();
-
         }
 
         // Make sure we advance the cursor one step further.
@@ -78,12 +80,10 @@ class Complex extends XmlFragment {
 
         if ($nonText) {
             $new = new self($xml);
+
             return $new;
         } else {
             return $text;
         }
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/GetLastModified.php b/vendor/sabre/dav/lib/DAV/Xml/Property/GetLastModified.php
index 101a0f0c9..05a00c5e5 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/GetLastModified.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/GetLastModified.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use DateTime;
@@ -19,42 +21,40 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class GetLastModified implements Element {
-
+class GetLastModified implements Element
+{
     /**
-     * time
+     * time.
      *
      * @var DateTime
      */
     public $time;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param int|DateTime $time
      */
-    function __construct($time) {
-
+    public function __construct($time)
+    {
         if ($time instanceof DateTime) {
             $this->time = clone $time;
         } else {
-            $this->time = new DateTime('@' . $time);
+            $this->time = new DateTime('@'.$time);
         }
 
         // Setting timezone to UTC
         $this->time->setTimezone(new DateTimeZone('UTC'));
-
     }
 
     /**
-     * getTime
+     * getTime.
      *
      * @return DateTime
      */
-    function getTime() {
-
+    public function getTime()
+    {
         return $this->time;
-
     }
 
     /**
@@ -70,14 +70,12 @@ class GetLastModified implements Element {
      * responsible for closing them.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         $writer->write(
-            HTTP\Util::toHTTPDate($this->time)
+            HTTP\toDate($this->time)
         );
-
     }
 
     /**
@@ -99,12 +97,12 @@ class GetLastModified implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         return
             new self(new DateTime($reader->parseInnerTree()));
-
     }
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php b/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php
index 6c4f11b87..c479c1602 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\DAV\Browser\HtmlOutput;
@@ -10,7 +12,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\Writer;
 
 /**
- * Href property
+ * Href property.
  *
  * This class represents any WebDAV property that contains a {DAV:}href
  * element, and there are many.
@@ -23,17 +25,17 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Href implements Element, HtmlOutput {
-
+class Href implements Element, HtmlOutput
+{
     /**
-     * List of uris
+     * List of uris.
      *
      * @var array
      */
     protected $hrefs;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * You must either pass a string for a single href, or an array of hrefs.
      *
@@ -42,35 +44,32 @@ class Href implements Element, HtmlOutput {
      *
      * @param string|string[] $hrefs
      */
-    function __construct($hrefs) {
-
+    public function __construct($hrefs)
+    {
         if (is_string($hrefs)) {
             $hrefs = [$hrefs];
         }
         $this->hrefs = $hrefs;
-
     }
 
     /**
      * Returns the first Href.
      *
-     * @return string
+     * @return string|null
      */
-    function getHref() {
-
-        return $this->hrefs[0];
-
+    public function getHref()
+    {
+        return $this->hrefs[0] ?? null;
     }
 
     /**
-     * Returns the hrefs as an array
+     * Returns the hrefs as an array.
      *
      * @return array
      */
-    function getHrefs() {
-
+    public function getHrefs()
+    {
         return $this->hrefs;
-
     }
 
     /**
@@ -90,15 +89,13 @@ class Href implements Element, HtmlOutput {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->getHrefs() as $href) {
             $href = Uri\resolve($writer->contextUri, $href);
             $writer->writeElement('{DAV:}href', $href);
         }
-
     }
 
     /**
@@ -113,16 +110,17 @@ class Href implements Element, HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
+    public function toHtml(HtmlOutputHelper $html)
+    {
         $links = [];
         foreach ($this->getHrefs() as $href) {
             $links[] = $html->link($href);
         }
-        return implode('<br />', $links);
 
+        return implode('<br />', $links);
     }
 
     /**
@@ -144,22 +142,21 @@ class Href implements Element, HtmlOutput {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $hrefs = [];
-        foreach ((array)$reader->parseInnerTree() as $elem) {
-            if ($elem['name'] !== '{DAV:}href')
+        foreach ((array) $reader->parseInnerTree() as $elem) {
+            if ('{DAV:}href' !== $elem['name']) {
                 continue;
+            }
 
             $hrefs[] = $elem['value'];
-
         }
         if ($hrefs) {
-            return new self($hrefs, false);
+            return new self($hrefs);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/Invite.php b/vendor/sabre/dav/lib/DAV/Xml/Property/Invite.php
index 6adad3650..b5e2dae46 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/Invite.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/Invite.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\DAV\Xml\Element\Sharee;
@@ -20,10 +22,10 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Invite implements XmlSerializable {
-
+class Invite implements XmlSerializable
+{
     /**
-     * A list of sharees
+     * A list of sharees.
      *
      * @var Sharee[]
      */
@@ -34,10 +36,9 @@ class Invite implements XmlSerializable {
      *
      * @param Sharee[] $sharees
      */
-    function __construct(array $sharees) {
-
+    public function __construct(array $sharees)
+    {
         $this->sharees = $sharees;
-
     }
 
     /**
@@ -57,14 +58,11 @@ class Invite implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->sharees as $sharee) {
             $writer->writeElement('{DAV:}sharee', $sharee);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/LocalHref.php b/vendor/sabre/dav/lib/DAV/Xml/Property/LocalHref.php
index 00d2fa708..cb794974f 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/LocalHref.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/LocalHref.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\HTTP;
 
 /**
- * LocalHref property
+ * LocalHref property.
  *
  * Like the Href property, this element represents {DAV:}href. The difference
  * is that this is used strictly for paths on the server. The LocalHref property
@@ -22,10 +24,10 @@ use Sabre\HTTP;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class LocalHref extends Href {
-
+class LocalHref extends Href
+{
     /**
-     * Constructor
+     * Constructor.
      *
      * You must either pass a string for a single href, or an array of hrefs.
      *
@@ -34,15 +36,13 @@ class LocalHref extends Href {
      *
      * @param string|string[] $hrefs
      */
-    function __construct($hrefs) {
-
+    public function __construct($hrefs)
+    {
         parent::__construct(array_map(
-            function($href) {
+            function ($href) {
                 return \Sabre\HTTP\encodePath($href);
             },
-            (array)$hrefs
+            (array) $hrefs
         ));
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/LockDiscovery.php b/vendor/sabre/dav/lib/DAV/Xml/Property/LockDiscovery.php
index f4b692219..c33812b3e 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/LockDiscovery.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/LockDiscovery.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\DAV;
@@ -20,10 +22,10 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class LockDiscovery implements XmlSerializable {
-
+class LockDiscovery implements XmlSerializable
+{
     /**
-     * locks
+     * locks.
      *
      * @var LockInfo[]
      */
@@ -37,17 +39,16 @@ class LockDiscovery implements XmlSerializable {
      *
      * @var bool
      */
-    static $hideLockRoot = false;
+    public static $hideLockRoot = false;
 
     /**
-     * __construct
+     * __construct.
      *
      * @param LockInfo[] $locks
      */
-    function __construct($locks) {
-
+    public function __construct($locks)
+    {
         $this->locks = $locks;
-
     }
 
     /**
@@ -63,16 +64,14 @@ class LockDiscovery implements XmlSerializable {
      * responsible for closing them.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->locks as $lock) {
-
             $writer->startElement('{DAV:}activelock');
 
             $writer->startElement('{DAV:}lockscope');
-            if ($lock->scope === LockInfo::SHARED) {
+            if (LockInfo::SHARED === $lock->scope) {
                 $writer->writeElement('{DAV:}shared');
             } else {
                 $writer->writeElement('{DAV:}exclusive');
@@ -86,21 +85,23 @@ class LockDiscovery implements XmlSerializable {
 
             if (!self::$hideLockRoot) {
                 $writer->startElement('{DAV:}lockroot');
-                $writer->writeElement('{DAV:}href', $writer->contextUri . $lock->uri);
+                $writer->writeElement('{DAV:}href', $writer->contextUri.$lock->uri);
                 $writer->endElement(); // {DAV:}lockroot
             }
-            $writer->writeElement('{DAV:}depth', ($lock->depth == DAV\Server::DEPTH_INFINITY ? 'infinity' : $lock->depth));
-            $writer->writeElement('{DAV:}timeout', 'Second-' . $lock->timeout);
-
-            $writer->startElement('{DAV:}locktoken');
-            $writer->writeElement('{DAV:}href', 'opaquelocktoken:' . $lock->token);
-            $writer->endElement(); // {DAV:}locktoken
+            $writer->writeElement('{DAV:}depth', (DAV\Server::DEPTH_INFINITY == $lock->depth ? 'infinity' : $lock->depth));
+            $writer->writeElement('{DAV:}timeout', (LockInfo::TIMEOUT_INFINITE === $lock->timeout ? 'Infinite' : 'Second-'.$lock->timeout));
+
+            // optional according to https://tools.ietf.org/html/rfc4918#section-6.5
+            if (null !== $lock->token && '' !== $lock->token) {
+                $writer->startElement('{DAV:}locktoken');
+                $writer->writeElement('{DAV:}href', 'opaquelocktoken:'.$lock->token);
+                $writer->endElement(); // {DAV:}locktoken
+            }
 
-            $writer->writeElement('{DAV:}owner', new XmlFragment($lock->owner));
+            if ($lock->owner) {
+                $writer->writeElement('{DAV:}owner', new XmlFragment($lock->owner));
+            }
             $writer->endElement(); // {DAV:}activelock
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/ResourceType.php b/vendor/sabre/dav/lib/DAV/Xml/Property/ResourceType.php
index ce640ff32..ce07d4382 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/ResourceType.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/ResourceType.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\DAV\Browser\HtmlOutput;
@@ -8,7 +10,7 @@ use Sabre\Xml\Element;
 use Sabre\Xml\Reader;
 
 /**
- * {DAV:}resourcetype property
+ * {DAV:}resourcetype property.
  *
  * This class represents the {DAV:}resourcetype property, as defined in:
  *
@@ -18,10 +20,10 @@ use Sabre\Xml\Reader;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ResourceType extends Element\Elements implements HtmlOutput {
-
+class ResourceType extends Element\Elements implements HtmlOutput
+{
     /**
-     * Constructor
+     * Constructor.
      *
      * You can either pass null (for no resourcetype), a string (for a single
      * resourcetype) or an array (for multiple).
@@ -30,48 +32,44 @@ class ResourceType extends Element\Elements implements HtmlOutput {
      *
      * @param array|string|null $resourceTypes
      */
-    function __construct($resourceTypes = null) {
-
-        parent::__construct((array)$resourceTypes);
-
+    public function __construct($resourceTypes = null)
+    {
+        parent::__construct((array) $resourceTypes);
     }
 
     /**
-     * Returns the values in clark-notation
+     * Returns the values in clark-notation.
      *
      * For example array('{DAV:}collection')
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->value;
-
     }
 
     /**
-     * Checks if the principal contains a certain value
+     * Checks if the principal contains a certain value.
      *
      * @param string $type
+     *
      * @return bool
      */
-    function is($type) {
-
+    public function is($type)
+    {
         return in_array($type, $this->value);
-
     }
 
     /**
-     * Adds a resourcetype value to this property
+     * Adds a resourcetype value to this property.
      *
      * @param string $type
-     * @return void
      */
-    function add($type) {
-
+    public function add($type)
+    {
         $this->value[] = $type;
         $this->value = array_unique($this->value);
-
     }
 
     /**
@@ -93,13 +91,13 @@ class ResourceType extends Element\Elements implements HtmlOutput {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         return
             new self(parent::xmlDeserialize($reader));
-
     }
 
     /**
@@ -114,15 +112,14 @@ class ResourceType extends Element\Elements implements HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
+    public function toHtml(HtmlOutputHelper $html)
+    {
         return implode(
             ', ',
             array_map([$html, 'xmlName'], $this->getValue())
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/ShareAccess.php b/vendor/sabre/dav/lib/DAV/Xml/Property/ShareAccess.php
index 939062f76..95175053a 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/ShareAccess.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/ShareAccess.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\DAV\Exception\BadRequest;
@@ -22,10 +24,10 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ShareAccess implements Element {
-
+class ShareAccess implements Element
+{
     /**
-     * Either SHARED or SHAREDOWNER
+     * Either SHARED or SHAREDOWNER.
      *
      * @var int
      */
@@ -39,10 +41,9 @@ class ShareAccess implements Element {
      *
      * @param int $shareAccess
      */
-    function __construct($shareAccess) {
-
+    public function __construct($shareAccess)
+    {
         $this->value = $shareAccess;
-
     }
 
     /**
@@ -50,10 +51,9 @@ class ShareAccess implements Element {
      *
      * @return int
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->value;
-
     }
 
     /**
@@ -73,30 +73,26 @@ class ShareAccess implements Element {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         switch ($this->value) {
-
-            case SharingPlugin::ACCESS_NOTSHARED :
+            case SharingPlugin::ACCESS_NOTSHARED:
                 $writer->writeElement('{DAV:}not-shared');
                 break;
-            case SharingPlugin::ACCESS_SHAREDOWNER :
+            case SharingPlugin::ACCESS_SHAREDOWNER:
                 $writer->writeElement('{DAV:}shared-owner');
                 break;
-            case SharingPlugin::ACCESS_READ :
+            case SharingPlugin::ACCESS_READ:
                 $writer->writeElement('{DAV:}read');
                 break;
-            case SharingPlugin::ACCESS_READWRITE :
+            case SharingPlugin::ACCESS_READWRITE:
                 $writer->writeElement('{DAV:}read-write');
                 break;
-            case SharingPlugin::ACCESS_NOACCESS :
+            case SharingPlugin::ACCESS_NOACCESS:
                 $writer->writeElement('{DAV:}no-access');
                 break;
-
         }
-
     }
 
     /**
@@ -118,26 +114,26 @@ class ShareAccess implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree();
         foreach ($elems as $elem) {
             switch ($elem['name']) {
-                case '{DAV:}not-shared' :
+                case '{DAV:}not-shared':
                     return new self(SharingPlugin::ACCESS_NOTSHARED);
-                case '{DAV:}shared-owner' :
+                case '{DAV:}shared-owner':
                     return new self(SharingPlugin::ACCESS_SHAREDOWNER);
-                case '{DAV:}read' :
+                case '{DAV:}read':
                     return new self(SharingPlugin::ACCESS_READ);
-                case '{DAV:}read-write' :
+                case '{DAV:}read-write':
                     return new self(SharingPlugin::ACCESS_READWRITE);
-                case '{DAV:}no-access' :
+                case '{DAV:}no-access':
                     return new self(SharingPlugin::ACCESS_NOACCESS);
             }
         }
         throw new BadRequest('Invalid value for {DAV:}share-access element');
-
     }
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedLock.php b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedLock.php
index 677fdde4b..26e7d646e 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedLock.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedLock.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\Xml\Writer;
@@ -18,8 +20,8 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedLock implements XmlSerializable {
-
+class SupportedLock implements XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -37,18 +39,16 @@ class SupportedLock implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         $writer->writeElement('{DAV:}lockentry', [
             '{DAV:}lockscope' => ['{DAV:}exclusive' => null],
-            '{DAV:}locktype'  => ['{DAV:}write' => null],
+            '{DAV:}locktype' => ['{DAV:}write' => null],
         ]);
         $writer->writeElement('{DAV:}lockentry', [
             '{DAV:}lockscope' => ['{DAV:}shared' => null],
-            '{DAV:}locktype'  => ['{DAV:}write' => null],
+            '{DAV:}locktype' => ['{DAV:}write' => null],
         ]);
-
     }
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php
index 1a3878ef7..06ab28c94 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\DAV\Browser\HtmlOutput;
@@ -20,24 +22,23 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedMethodSet implements XmlSerializable, HtmlOutput {
-
+class SupportedMethodSet implements XmlSerializable, HtmlOutput
+{
     /**
-     * List of methods
+     * List of methods.
      *
      * @var string[]
      */
     protected $methods = [];
 
     /**
-     * Creates the property
+     * Creates the property.
      *
      * @param string[] $methods
      */
-    function __construct(array $methods) {
-
+    public function __construct(array $methods)
+    {
         $this->methods = $methods;
-
     }
 
     /**
@@ -45,25 +46,24 @@ class SupportedMethodSet implements XmlSerializable, HtmlOutput {
      *
      * @return string[]
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->methods;
-
     }
 
     /**
      * Returns true or false if the property contains a specific method.
      *
      * @param string $methodName
+     *
      * @return bool
      */
-    function has($methodName) {
-
+    public function has($methodName)
+    {
         return in_array(
             $methodName,
             $this->methods
         );
-
     }
 
     /**
@@ -83,16 +83,14 @@ class SupportedMethodSet implements XmlSerializable, HtmlOutput {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->getValue() as $val) {
             $writer->startElement('{DAV:}supported-method');
             $writer->writeAttribute('name', $val);
             $writer->endElement();
         }
-
     }
 
     /**
@@ -107,15 +105,14 @@ class SupportedMethodSet implements XmlSerializable, HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
+    public function toHtml(HtmlOutputHelper $html)
+    {
         return implode(
             ', ',
             array_map([$html, 'h'], $this->getValue())
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedReportSet.php b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedReportSet.php
index 96383ec96..4c25d23d9 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedReportSet.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedReportSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Property;
 
 use Sabre\DAV;
@@ -21,17 +23,17 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedReportSet implements XmlSerializable, HtmlOutput {
-
+class SupportedReportSet implements XmlSerializable, HtmlOutput
+{
     /**
-     * List of reports
+     * List of reports.
      *
      * @var array
      */
     protected $reports = [];
 
     /**
-     * Creates the property
+     * Creates the property.
      *
      * Any reports passed in the constructor
      * should be valid report-types in clark-notation.
@@ -40,61 +42,56 @@ class SupportedReportSet implements XmlSerializable, HtmlOutput {
      *
      * @param string|string[] $reports
      */
-    function __construct($reports = null) {
-
-        if (!is_null($reports))
+    public function __construct($reports = null)
+    {
+        if (!is_null($reports)) {
             $this->addReport($reports);
-
+        }
     }
 
     /**
-     * Adds a report to this property
+     * Adds a report to this property.
      *
      * The report must be a string in clark-notation.
      * Multiple reports can be specified as an array.
      *
      * @param mixed $report
-     * @return void
      */
-    function addReport($report) {
-
-        $report = (array)$report;
+    public function addReport($report)
+    {
+        $report = (array) $report;
 
         foreach ($report as $r) {
-
-            if (!preg_match('/^{([^}]*)}(.*)$/', $r))
+            if (!preg_match('/^{([^}]*)}(.*)$/', $r)) {
                 throw new DAV\Exception('Reportname must be in clark-notation');
-
+            }
             $this->reports[] = $r;
-
         }
-
     }
 
     /**
-     * Returns the list of supported reports
+     * Returns the list of supported reports.
      *
      * @return string[]
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->reports;
-
     }
 
     /**
      * Returns true or false if the property contains a specific report.
      *
      * @param string $reportName
+     *
      * @return bool
      */
-    function has($reportName) {
-
+    public function has($reportName)
+    {
         return in_array(
             $reportName,
             $this->reports
         );
-
     }
 
     /**
@@ -114,10 +111,9 @@ class SupportedReportSet implements XmlSerializable, HtmlOutput {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->getValue() as $val) {
             $writer->startElement('{DAV:}supported-report');
             $writer->startElement('{DAV:}report');
@@ -125,7 +121,6 @@ class SupportedReportSet implements XmlSerializable, HtmlOutput {
             $writer->endElement();
             $writer->endElement();
         }
-
     }
 
     /**
@@ -140,15 +135,14 @@ class SupportedReportSet implements XmlSerializable, HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
+    public function toHtml(HtmlOutputHelper $html)
+    {
         return implode(
             ', ',
             array_map([$html, 'xmlName'], $this->getValue())
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Request/Lock.php b/vendor/sabre/dav/lib/DAV/Xml/Request/Lock.php
index c315a9a45..8d9348162 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Request/Lock.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Request/Lock.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Request;
 
 use Sabre\DAV\Locks\LockInfo;
@@ -18,10 +20,10 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Lock implements XmlDeserializable {
-
+class Lock implements XmlDeserializable
+{
     /**
-     * Owner of the lock
+     * Owner of the lock.
      *
      * @var string
      */
@@ -31,6 +33,7 @@ class Lock implements XmlDeserializable {
      * Scope of the lock.
      *
      * Either LockInfo::SHARED or LockInfo::EXCLUSIVE
+     *
      * @var int
      */
     public $scope;
@@ -54,10 +57,11 @@ class Lock implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $reader->pushContext();
         $reader->elementMap['{DAV:}owner'] = 'Sabre\\Xml\\Element\\XmlFragment';
 
@@ -71,11 +75,12 @@ class Lock implements XmlDeserializable {
 
         if (isset($values['{DAV:}lockscope'])) {
             foreach ($values['{DAV:}lockscope'] as $elem) {
-                if ($elem['name'] === '{DAV:}exclusive') $new->scope = LockInfo::EXCLUSIVE;
+                if ('{DAV:}exclusive' === $elem['name']) {
+                    $new->scope = LockInfo::EXCLUSIVE;
+                }
             }
         }
-        return $new;
 
+        return $new;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Request/MkCol.php b/vendor/sabre/dav/lib/DAV/Xml/Request/MkCol.php
index 9490bf58c..7713646ea 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Request/MkCol.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Request/MkCol.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Request;
 
 use Sabre\Xml\Reader;
@@ -16,8 +18,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MkCol implements XmlDeserializable {
-
+class MkCol implements XmlDeserializable
+{
     /**
      * The list of properties that will be set.
      *
@@ -31,10 +33,9 @@ class MkCol implements XmlDeserializable {
      *
      * @return array
      */
-    function getProperties() {
-
+    public function getProperties()
+    {
         return $this->properties;
-
     }
 
     /**
@@ -56,10 +57,11 @@ class MkCol implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $self = new self();
 
         $elementMap = $reader->elementMap;
@@ -70,13 +72,11 @@ class MkCol implements XmlDeserializable {
         $elems = $reader->parseInnerTree($elementMap);
 
         foreach ($elems as $elem) {
-            if ($elem['name'] === '{DAV:}set') {
+            if ('{DAV:}set' === $elem['name']) {
                 $self->properties = array_merge($self->properties, $elem['value']['{DAV:}prop']);
             }
         }
 
         return $self;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Request/PropFind.php b/vendor/sabre/dav/lib/DAV/Xml/Request/PropFind.php
index f1b5b6fdc..b4cce423e 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Request/PropFind.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Request/PropFind.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Request;
 
 use Sabre\Xml\Element\KeyValue;
@@ -17,8 +19,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PropFind implements XmlDeserializable {
-
+class PropFind implements XmlDeserializable
+{
     /**
      * If this is set to true, this was an 'allprop' request.
      *
@@ -27,9 +29,9 @@ class PropFind implements XmlDeserializable {
     public $allProp = false;
 
     /**
-     * The property list
+     * The property list.
      *
-     * @var null|array
+     * @var array|null
      */
     public $properties;
 
@@ -52,32 +54,28 @@ class PropFind implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $self = new self();
 
         $reader->pushContext();
         $reader->elementMap['{DAV:}prop'] = 'Sabre\Xml\Element\Elements';
 
         foreach (KeyValue::xmlDeserialize($reader) as $k => $v) {
-
             switch ($k) {
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $self->properties = $v;
                     break;
-                case '{DAV:}allprop' :
+                case '{DAV:}allprop':
                     $self->allProp = true;
-
             }
-
         }
 
         $reader->popContext();
 
         return $self;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php b/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php
index 821b9e047..55e154ec7 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Request;
 
 use Sabre\Xml\Element;
@@ -17,8 +19,8 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PropPatch implements Element {
-
+class PropPatch implements Element
+{
     /**
      * The list of properties that will be updated and removed.
      *
@@ -45,24 +47,20 @@ class PropPatch implements Element {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->properties as $propertyName => $propertyValue) {
-
             if (is_null($propertyValue)) {
-                $writer->startElement("{DAV:}remove");
+                $writer->startElement('{DAV:}remove');
                 $writer->write(['{DAV:}prop' => [$propertyName => $propertyValue]]);
                 $writer->endElement();
             } else {
-                $writer->startElement("{DAV:}set");
+                $writer->startElement('{DAV:}set');
                 $writer->write(['{DAV:}prop' => [$propertyName => $propertyValue]]);
                 $writer->endElement();
             }
-
         }
-
     }
 
     /**
@@ -84,10 +82,11 @@ class PropPatch implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $self = new self();
 
         $elementMap = $reader->elementMap;
@@ -98,21 +97,17 @@ class PropPatch implements Element {
         $elems = $reader->parseInnerTree($elementMap);
 
         foreach ($elems as $elem) {
-            if ($elem['name'] === '{DAV:}set') {
+            if ('{DAV:}set' === $elem['name']) {
                 $self->properties = array_merge($self->properties, $elem['value']['{DAV:}prop']);
             }
-            if ($elem['name'] === '{DAV:}remove') {
-
+            if ('{DAV:}remove' === $elem['name']) {
                 // Ensuring there are no values.
                 foreach ($elem['value']['{DAV:}prop'] as $remove => $value) {
                     $self->properties[$remove] = null;
                 }
-
             }
         }
 
         return $self;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Request/ShareResource.php b/vendor/sabre/dav/lib/DAV/Xml/Request/ShareResource.php
index 526a4eb6f..e1985b8c3 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Request/ShareResource.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Request/ShareResource.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Request;
 
 use Sabre\DAV\Xml\Element\Sharee;
@@ -17,8 +19,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ShareResource implements XmlDeserializable {
-
+class ShareResource implements XmlDeserializable
+{
     /**
      * The list of new people added or updated or removed from the share.
      *
@@ -27,14 +29,13 @@ class ShareResource implements XmlDeserializable {
     public $sharees = [];
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Sharee[] $sharees
      */
-    function __construct(array $sharees) {
-
+    public function __construct(array $sharees)
+    {
         $this->sharees = $sharees;
-
     }
 
     /**
@@ -56,26 +57,26 @@ class ShareResource implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree([
-            '{DAV:}sharee'       => 'Sabre\DAV\Xml\Element\Sharee',
+            '{DAV:}sharee' => 'Sabre\DAV\Xml\Element\Sharee',
             '{DAV:}share-access' => 'Sabre\DAV\Xml\Property\ShareAccess',
-            '{DAV:}prop'         => 'Sabre\Xml\Deserializer\keyValue',
+            '{DAV:}prop' => 'Sabre\Xml\Deserializer\keyValue',
         ]);
 
         $sharees = [];
 
         foreach ($elems as $elem) {
-            if ($elem['name'] !== '{DAV:}sharee') continue;
+            if ('{DAV:}sharee' !== $elem['name']) {
+                continue;
+            }
             $sharees[] = $elem['value'];
-
         }
 
         return new self($sharees);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Request/SyncCollectionReport.php b/vendor/sabre/dav/lib/DAV/Xml/Request/SyncCollectionReport.php
index 830293a01..acf0039ce 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Request/SyncCollectionReport.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Request/SyncCollectionReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Request;
 
 use Sabre\DAV\Exception\BadRequest;
@@ -18,8 +20,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SyncCollectionReport implements XmlDeserializable {
-
+class SyncCollectionReport implements XmlDeserializable
+{
     /**
      * The sync-token the client supplied for the report.
      *
@@ -44,7 +46,7 @@ class SyncCollectionReport implements XmlDeserializable {
     /**
      * The list of properties that are being requested for every change.
      *
-     * @var null|array
+     * @var array|null
      */
     public $properties;
 
@@ -67,10 +69,11 @@ class SyncCollectionReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $self = new self();
 
         $reader->pushContext();
@@ -87,36 +90,31 @@ class SyncCollectionReport implements XmlDeserializable {
 
         foreach ($required as $elem) {
             if (!array_key_exists($elem, $elems)) {
-                throw new BadRequest('The ' . $elem . ' element in the {DAV:}sync-collection report is required');
+                throw new BadRequest('The '.$elem.' element in the {DAV:}sync-collection report is required');
             }
         }
 
-
         $self->properties = $elems['{DAV:}prop'];
         $self->syncToken = $elems['{DAV:}sync-token'];
 
         if (isset($elems['{DAV:}limit'])) {
             $nresults = null;
             foreach ($elems['{DAV:}limit'] as $child) {
-                if ($child['name'] === '{DAV:}nresults') {
-                    $nresults = (int)$child['value'];
+                if ('{DAV:}nresults' === $child['name']) {
+                    $nresults = (int) $child['value'];
                 }
             }
             $self->limit = $nresults;
         }
 
         if (isset($elems['{DAV:}sync-level'])) {
-
             $value = $elems['{DAV:}sync-level'];
-            if ($value === 'infinity') {
+            if ('infinity' === $value) {
                 $value = \Sabre\DAV\Server::DEPTH_INFINITY;
             }
             $self->syncLevel = $value;
-
         }
 
         return $self;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Response/MultiStatus.php b/vendor/sabre/dav/lib/DAV/Xml/Response/MultiStatus.php
index cf5a0453b..423d0b569 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Response/MultiStatus.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Response/MultiStatus.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml\Response;
 
 use Sabre\Xml\Element;
@@ -7,7 +9,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\Writer;
 
 /**
- * WebDAV MultiStatus parser
+ * WebDAV MultiStatus parser.
  *
  * This class parses the {DAV:}multistatus response, as defined in:
  * https://tools.ietf.org/html/rfc4918#section-14.16
@@ -19,10 +21,10 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MultiStatus implements Element {
-
+class MultiStatus implements Element
+{
     /**
-     * The responses
+     * The responses.
      *
      * @var \Sabre\DAV\Xml\Element\Response[]
      */
@@ -36,16 +38,15 @@ class MultiStatus implements Element {
     protected $syncToken;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param \Sabre\DAV\Xml\Element\Response[] $responses
-     * @param string $syncToken
+     * @param string                            $syncToken
      */
-    function __construct(array $responses, $syncToken = null) {
-
+    public function __construct(array $responses, $syncToken = null)
+    {
         $this->responses = $responses;
         $this->syncToken = $syncToken;
-
     }
 
     /**
@@ -53,10 +54,9 @@ class MultiStatus implements Element {
      *
      * @return \Sabre\DAV\Xml\Element\Response[]
      */
-    function getResponses() {
-
+    public function getResponses()
+    {
         return $this->responses;
-
     }
 
     /**
@@ -64,10 +64,9 @@ class MultiStatus implements Element {
      *
      * @return string|null
      */
-    function getSyncToken() {
-
+    public function getSyncToken()
+    {
         return $this->syncToken;
-
     }
 
     /**
@@ -83,17 +82,15 @@ class MultiStatus implements Element {
      * responsible for closing them.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->getResponses() as $response) {
             $writer->writeElement('{DAV:}response', $response);
         }
         if ($syncToken = $this->getSyncToken()) {
             $writer->writeElement('{DAV:}sync-token', $syncToken);
         }
-
     }
 
     /**
@@ -115,10 +112,11 @@ class MultiStatus implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elementMap = $reader->elementMap;
         $elementMap['{DAV:}prop'] = 'Sabre\\DAV\\Xml\\Element\\Prop';
         $elements = $reader->parseInnerTree($elementMap);
@@ -126,17 +124,17 @@ class MultiStatus implements Element {
         $responses = [];
         $syncToken = null;
 
-        if ($elements) foreach ($elements as $elem) {
-            if ($elem['name'] === '{DAV:}response') {
-                $responses[] = $elem['value'];
-            }
-            if ($elem['name'] === '{DAV:}sync-token') {
-                $syncToken = $elem['value'];
+        if ($elements) {
+            foreach ($elements as $elem) {
+                if ('{DAV:}response' === $elem['name']) {
+                    $responses[] = $elem['value'];
+                }
+                if ('{DAV:}sync-token' === $elem['name']) {
+                    $syncToken = $elem['value'];
+                }
             }
         }
 
         return new self($responses, $syncToken);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Service.php b/vendor/sabre/dav/lib/DAV/Xml/Service.php
index f41ed984a..4406b022d 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Service.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Service.php
@@ -1,16 +1,18 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Xml;
 
 /**
- * XML service for WebDAV
+ * XML service for WebDAV.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Service extends \Sabre\Xml\Service {
-
+class Service extends \Sabre\Xml\Service
+{
     /**
      * This is a list of XML elements that we automatically map to PHP classes.
      *
@@ -19,16 +21,15 @@ class Service extends \Sabre\Xml\Service {
      */
     public $elementMap = [
         '{DAV:}multistatus' => 'Sabre\\DAV\\Xml\\Response\\MultiStatus',
-        '{DAV:}response'    => 'Sabre\\DAV\\Xml\\Element\\Response',
+        '{DAV:}response' => 'Sabre\\DAV\\Xml\\Element\\Response',
 
         // Requests
-        '{DAV:}propfind'       => 'Sabre\\DAV\\Xml\\Request\\PropFind',
+        '{DAV:}propfind' => 'Sabre\\DAV\\Xml\\Request\\PropFind',
         '{DAV:}propertyupdate' => 'Sabre\\DAV\\Xml\\Request\\PropPatch',
-        '{DAV:}mkcol'          => 'Sabre\\DAV\\Xml\\Request\\MkCol',
+        '{DAV:}mkcol' => 'Sabre\\DAV\\Xml\\Request\\MkCol',
 
         // Properties
         '{DAV:}resourcetype' => 'Sabre\\DAV\\Xml\\Property\\ResourceType',
-
     ];
 
     /**
@@ -40,8 +41,7 @@ class Service extends \Sabre\Xml\Service {
      * @var array
      */
     public $namespaceMap = [
-        'DAV:'                   => 'd',
+        'DAV:' => 'd',
         'http://sabredav.org/ns' => 's',
     ];
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/ACLTrait.php b/vendor/sabre/dav/lib/DAVACL/ACLTrait.php
index 602654a2e..d9bf4e1e0 100644
--- a/vendor/sabre/dav/lib/DAVACL/ACLTrait.php
+++ b/vendor/sabre/dav/lib/DAVACL/ACLTrait.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 /**
@@ -14,32 +16,30 @@ namespace Sabre\DAVACL;
  * @author Evert Pot (https://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-trait ACLTrait {
-
+trait ACLTrait
+{
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return null;
-
     }
 
     /**
-     * Returns a group principal
+     * Returns a group principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getGroup() {
-
+    public function getGroup()
+    {
         return null;
-
     }
 
     /**
@@ -54,28 +54,26 @@ trait ACLTrait {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return [
             [
                 'privilege' => '{DAV:}all',
                 'principal' => '{DAV:}owner',
                 'protected' => true,
-            ]
+            ],
         ];
-
     }
 
     /**
-     * Updates the ACL
+     * Updates the ACL.
      *
      * This method will receive a list of new ACE's as an array argument.
      *
      * @param array $acl
-     * @return void
      */
-    function setACL(array $acl) {
-
+    public function setACL(array $acl)
+    {
         throw new \Sabre\DAV\Exception\Forbidden('Setting ACL is not supported on this node');
     }
 
@@ -91,10 +89,8 @@ trait ACLTrait {
      *
      * @return array|null
      */
-    function getSupportedPrivilegeSet() {
-
+    public function getSupportedPrivilegeSet()
+    {
         return null;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php b/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php
index 9d2026380..1160dd7ac 100644
--- a/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php
+++ b/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
- * Principals Collection
+ * Principals Collection.
  *
  * This is a helper class that easily allows you to create a collection that
  * has a childnode for every principal.
@@ -17,10 +19,10 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractPrincipalCollection extends DAV\Collection implements IPrincipalCollection {
-
+abstract class AbstractPrincipalCollection extends DAV\Collection implements IPrincipalCollection
+{
     /**
-     * Principal backend
+     * Principal backend.
      *
      * @var PrincipalBackend\BackendInterface
      */
@@ -42,7 +44,7 @@ abstract class AbstractPrincipalCollection extends DAV\Collection implements IPr
     public $disableListing = false;
 
     /**
-     * Creates the object
+     * Creates the object.
      *
      * This object must be passed the principal backend. This object will
      * filter all principals from a specified prefix ($principalPrefix). The
@@ -51,13 +53,12 @@ abstract class AbstractPrincipalCollection extends DAV\Collection implements IPr
      *
      *
      * @param PrincipalBackend\BackendInterface $principalBackend
-     * @param string $principalPrefix
+     * @param string                            $principalPrefix
      */
-    function __construct(PrincipalBackend\BackendInterface $principalBackend, $principalPrefix = 'principals') {
-
+    public function __construct(PrincipalBackend\BackendInterface $principalBackend, $principalPrefix = 'principals')
+    {
         $this->principalPrefix = $principalPrefix;
         $this->principalBackend = $principalBackend;
-
     }
 
     /**
@@ -68,56 +69,58 @@ abstract class AbstractPrincipalCollection extends DAV\Collection implements IPr
      * supplied by the authentication backend.
      *
      * @param array $principalInfo
-     * @return IPrincipal
+     *
+     * @return DAV\INode
      */
-    abstract function getChildForPrincipal(array $principalInfo);
+    abstract public function getChildForPrincipal(array $principalInfo);
 
     /**
      * Returns the name of this collection.
      *
      * @return string
      */
-    function getName() {
+    public function getName()
+    {
+        list(, $name) = Uri\split($this->principalPrefix);
 
-        list(, $name) = URLUtil::splitPath($this->principalPrefix);
         return $name;
-
     }
 
     /**
-     * Return the list of users
+     * Return the list of users.
      *
      * @return array
      */
-    function getChildren() {
-
-        if ($this->disableListing)
+    public function getChildren()
+    {
+        if ($this->disableListing) {
             throw new DAV\Exception\MethodNotAllowed('Listing members of this collection is disabled');
-
+        }
         $children = [];
         foreach ($this->principalBackend->getPrincipalsByPrefix($this->principalPrefix) as $principalInfo) {
-
             $children[] = $this->getChildForPrincipal($principalInfo);
-
-
         }
-        return $children;
 
+        return $children;
     }
 
     /**
      * Returns a child object, by its name.
      *
      * @param string $name
+     *
      * @throws DAV\Exception\NotFound
+     *
      * @return DAV\INode
      */
-    function getChild($name) {
+    public function getChild($name)
+    {
+        $principalInfo = $this->principalBackend->getPrincipalByPath($this->principalPrefix.'/'.$name);
+        if (!$principalInfo) {
+            throw new DAV\Exception\NotFound('Principal with name '.$name.' not found');
+        }
 
-        $principalInfo = $this->principalBackend->getPrincipalByPath($this->principalPrefix . '/' . $name);
-        if (!$principalInfo) throw new DAV\Exception\NotFound('Principal with name ' . $name . ' not found');
         return $this->getChildForPrincipal($principalInfo);
-
     }
 
     /**
@@ -139,21 +142,21 @@ abstract class AbstractPrincipalCollection extends DAV\Collection implements IPr
      * This method should simply return a list of 'child names', which may be
      * used to call $this->getChild in the future.
      *
-     * @param array $searchProperties
+     * @param array  $searchProperties
      * @param string $test
+     *
      * @return array
      */
-    function searchPrincipals(array $searchProperties, $test = 'allof') {
-
+    public function searchPrincipals(array $searchProperties, $test = 'allof')
+    {
         $result = $this->principalBackend->searchPrincipals($this->principalPrefix, $searchProperties, $test);
         $r = [];
 
         foreach ($result as $row) {
-            list(, $r[]) = URLUtil::splitPath($row);
+            list(, $r[]) = Uri\split($row);
         }
 
         return $r;
-
     }
 
     /**
@@ -170,12 +173,11 @@ abstract class AbstractPrincipalCollection extends DAV\Collection implements IPr
      * principal was not found or you refuse to find it.
      *
      * @param string $uri
+     *
      * @return string
      */
-    function findByUri($uri) {
-
+    public function findByUri($uri)
+    {
         return $this->principalBackend->findByUri($uri, $this->principalPrefix);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Exception/AceConflict.php b/vendor/sabre/dav/lib/DAVACL/Exception/AceConflict.php
index 22450b4a6..7756d4728 100644
--- a/vendor/sabre/dav/lib/DAVACL/Exception/AceConflict.php
+++ b/vendor/sabre/dav/lib/DAVACL/Exception/AceConflict.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
@@ -12,24 +14,21 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AceConflict extends DAV\Exception\Conflict {
-
+class AceConflict extends DAV\Exception\Conflict
+{
     /**
      * Adds in extra information in the xml response.
      *
      * This method adds the {DAV:}no-ace-conflict element as defined in rfc3744
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $doc = $errorNode->ownerDocument;
 
         $np = $doc->createElementNS('DAV:', 'd:no-ace-conflict');
         $errorNode->appendChild($np);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Exception/NeedPrivileges.php b/vendor/sabre/dav/lib/DAVACL/Exception/NeedPrivileges.php
index 5624fd22f..19e0dac9d 100644
--- a/vendor/sabre/dav/lib/DAVACL/Exception/NeedPrivileges.php
+++ b/vendor/sabre/dav/lib/DAVACL/Exception/NeedPrivileges.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
 
 /**
- * NeedPrivileges
+ * NeedPrivileges.
  *
  * The 403-need privileges is thrown when a user didn't have the appropriate
  * permissions to perform an operation
@@ -14,10 +16,10 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class NeedPrivileges extends DAV\Exception\Forbidden {
-
+class NeedPrivileges extends DAV\Exception\Forbidden
+{
     /**
-     * The relevant uri
+     * The relevant uri.
      *
      * @var string
      */
@@ -31,18 +33,17 @@ class NeedPrivileges extends DAV\Exception\Forbidden {
     protected $privileges;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param string $uri
-     * @param array $privileges
+     * @param array  $privileges
      */
-    function __construct($uri, array $privileges) {
-
+    public function __construct($uri, array $privileges)
+    {
         $this->uri = $uri;
         $this->privileges = $privileges;
 
-        parent::__construct('User did not have the required privileges (' . implode(',', $privileges) . ') for path "' . $uri . '"');
-
+        parent::__construct('User did not have the required privileges ('.implode(',', $privileges).') for path "'.$uri.'"');
     }
 
     /**
@@ -50,33 +51,27 @@ class NeedPrivileges extends DAV\Exception\Forbidden {
      *
      * This method adds the {DAV:}need-privileges element as defined in rfc3744
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $doc = $errorNode->ownerDocument;
 
         $np = $doc->createElementNS('DAV:', 'd:need-privileges');
         $errorNode->appendChild($np);
 
         foreach ($this->privileges as $privilege) {
-
             $resource = $doc->createElementNS('DAV:', 'd:resource');
             $np->appendChild($resource);
 
-            $resource->appendChild($doc->createElementNS('DAV:', 'd:href', $server->getBaseUri() . $this->uri));
+            $resource->appendChild($doc->createElementNS('DAV:', 'd:href', $server->getBaseUri().$this->uri));
 
             $priv = $doc->createElementNS('DAV:', 'd:privilege');
             $resource->appendChild($priv);
 
             preg_match('/^{([^}]*)}(.*)$/', $privilege, $privilegeParts);
-            $priv->appendChild($doc->createElementNS($privilegeParts[1], 'd:' . $privilegeParts[2]));
-
-
+            $priv->appendChild($doc->createElementNS($privilegeParts[1], 'd:'.$privilegeParts[2]));
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Exception/NoAbstract.php b/vendor/sabre/dav/lib/DAVACL/Exception/NoAbstract.php
index a2363b174..d90b01ffd 100644
--- a/vendor/sabre/dav/lib/DAVACL/Exception/NoAbstract.php
+++ b/vendor/sabre/dav/lib/DAVACL/Exception/NoAbstract.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
@@ -12,24 +14,21 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class NoAbstract extends DAV\Exception\PreconditionFailed {
-
+class NoAbstract extends DAV\Exception\PreconditionFailed
+{
     /**
      * Adds in extra information in the xml response.
      *
      * This method adds the {DAV:}no-abstract element as defined in rfc3744
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $doc = $errorNode->ownerDocument;
 
         $np = $doc->createElementNS('DAV:', 'd:no-abstract');
         $errorNode->appendChild($np);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Exception/NotRecognizedPrincipal.php b/vendor/sabre/dav/lib/DAVACL/Exception/NotRecognizedPrincipal.php
index d7ae188ae..b005c55d8 100644
--- a/vendor/sabre/dav/lib/DAVACL/Exception/NotRecognizedPrincipal.php
+++ b/vendor/sabre/dav/lib/DAVACL/Exception/NotRecognizedPrincipal.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
@@ -12,24 +14,21 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class NotRecognizedPrincipal extends DAV\Exception\PreconditionFailed {
-
+class NotRecognizedPrincipal extends DAV\Exception\PreconditionFailed
+{
     /**
      * Adds in extra information in the xml response.
      *
      * This method adds the {DAV:}recognized-principal element as defined in rfc3744
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $doc = $errorNode->ownerDocument;
 
         $np = $doc->createElementNS('DAV:', 'd:recognized-principal');
         $errorNode->appendChild($np);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Exception/NotSupportedPrivilege.php b/vendor/sabre/dav/lib/DAVACL/Exception/NotSupportedPrivilege.php
index 73b81190d..dda2e6281 100644
--- a/vendor/sabre/dav/lib/DAVACL/Exception/NotSupportedPrivilege.php
+++ b/vendor/sabre/dav/lib/DAVACL/Exception/NotSupportedPrivilege.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
@@ -12,24 +14,21 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class NotSupportedPrivilege extends DAV\Exception\PreconditionFailed {
-
+class NotSupportedPrivilege extends DAV\Exception\PreconditionFailed
+{
     /**
      * Adds in extra information in the xml response.
      *
      * This method adds the {DAV:}not-supported-privilege element as defined in rfc3744
      *
-     * @param DAV\Server $server
+     * @param DAV\Server  $server
      * @param \DOMElement $errorNode
-     * @return void
      */
-    function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
+    public function serialize(DAV\Server $server, \DOMElement $errorNode)
+    {
         $doc = $errorNode->ownerDocument;
 
         $np = $doc->createElementNS('DAV:', 'd:not-supported-privilege');
         $errorNode->appendChild($np);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/FS/Collection.php b/vendor/sabre/dav/lib/DAVACL/FS/Collection.php
index b4fe7a1b0..85b04e2bd 100644
--- a/vendor/sabre/dav/lib/DAVACL/FS/Collection.php
+++ b/vendor/sabre/dav/lib/DAVACL/FS/Collection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\FS;
 
 use Sabre\DAV\Exception\Forbidden;
@@ -15,8 +17,8 @@ use Sabre\DAVACL\IACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Collection extends BaseCollection implements IACL {
-
+class Collection extends BaseCollection implements IACL
+{
     use ACLTrait;
 
     /**
@@ -34,60 +36,58 @@ class Collection extends BaseCollection implements IACL {
     protected $owner;
 
     /**
-     * Constructor
+     * Constructor.
      *
-     * @param string $path on-disk path.
-     * @param array $acl ACL rules.
-     * @param string|null $owner principal owner string.
+     * @param string      $path  on-disk path
+     * @param array       $acl   ACL rules
+     * @param string|null $owner principal owner string
      */
-    function __construct($path, array $acl, $owner = null) {
-
+    public function __construct($path, array $acl, $owner = null)
+    {
         parent::__construct($path);
         $this->acl = $acl;
         $this->owner = $owner;
-
     }
 
     /**
-     * Returns a specific child node, referenced by its name
+     * Returns a specific child node, referenced by its name.
      *
      * This method must throw Sabre\DAV\Exception\NotFound if the node does not
      * exist.
      *
      * @param string $name
+     *
      * @throws NotFound
+     *
      * @return \Sabre\DAV\INode
      */
-    function getChild($name) {
-
-        $path = $this->path . '/' . $name;
-
-        if (!file_exists($path)) throw new NotFound('File could not be located');
-        if ($name == '.' || $name == '..') throw new Forbidden('Permission denied to . and ..');
+    public function getChild($name)
+    {
+        $path = $this->path.'/'.$name;
 
+        if (!file_exists($path)) {
+            throw new NotFound('File could not be located');
+        }
+        if ('.' == $name || '..' == $name) {
+            throw new Forbidden('Permission denied to . and ..');
+        }
         if (is_dir($path)) {
-
             return new self($path, $this->acl, $this->owner);
-
         } else {
-
             return new File($path, $this->acl, $this->owner);
-
         }
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->owner;
-
     }
 
     /**
@@ -102,10 +102,8 @@ class Collection extends BaseCollection implements IACL {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return $this->acl;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/FS/File.php b/vendor/sabre/dav/lib/DAVACL/FS/File.php
index aaf2ae148..5506aa2c1 100644
--- a/vendor/sabre/dav/lib/DAVACL/FS/File.php
+++ b/vendor/sabre/dav/lib/DAVACL/FS/File.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\FS;
 
 use Sabre\DAV\FSExt\File as BaseFile;
@@ -13,8 +15,8 @@ use Sabre\DAVACL\IACL;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class File extends BaseFile implements IACL {
-
+class File extends BaseFile implements IACL
+{
     use ACLTrait;
 
     /**
@@ -32,31 +34,29 @@ class File extends BaseFile implements IACL {
     protected $owner;
 
     /**
-     * Constructor
+     * Constructor.
      *
-     * @param string $path on-disk path.
-     * @param array $acl ACL rules.
-     * @param string|null $owner principal owner string.
+     * @param string      $path  on-disk path
+     * @param array       $acl   ACL rules
+     * @param string|null $owner principal owner string
      */
-    function __construct($path, array $acl, $owner = null) {
-
+    public function __construct($path, array $acl, $owner = null)
+    {
         parent::__construct($path);
         $this->acl = $acl;
         $this->owner = $owner;
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->owner;
-
     }
 
     /**
@@ -71,10 +71,8 @@ class File extends BaseFile implements IACL {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return $this->acl;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php b/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php
index 201235e5a..c896d8e25 100644
--- a/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php
+++ b/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\FS;
 
 use Sabre\DAVACL\AbstractPrincipalCollection;
@@ -19,8 +21,8 @@ use Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class HomeCollection extends AbstractPrincipalCollection implements IACL {
-
+class HomeCollection extends AbstractPrincipalCollection implements IACL
+{
     use ACLTrait;
 
     /**
@@ -41,14 +43,13 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
      * Creates the home collection.
      *
      * @param BackendInterface $principalBackend
-     * @param string $storagePath Where the actual files are stored.
-     * @param string $principalPrefix list of principals to iterate.
+     * @param string           $storagePath      where the actual files are stored
+     * @param string           $principalPrefix  list of principals to iterate
      */
-    function __construct(BackendInterface $principalBackend, $storagePath, $principalPrefix = 'principals') {
-
+    public function __construct(BackendInterface $principalBackend, $storagePath, $principalPrefix = 'principals')
+    {
         parent::__construct($principalBackend, $principalPrefix);
         $this->storagePath = $storagePath;
-
     }
 
     /**
@@ -58,10 +59,9 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->collectionName;
-
     }
 
     /**
@@ -72,10 +72,11 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
      * supplied by the authentication backend.
      *
      * @param array $principalInfo
+     *
      * @return \Sabre\DAV\INode
      */
-    function getChildForPrincipal(array $principalInfo) {
-
+    public function getChildForPrincipal(array $principalInfo)
+    {
         $owner = $principalInfo['uri'];
         $acl = [
             [
@@ -87,20 +88,19 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
 
         list(, $principalBaseName) = Uri\split($owner);
 
-        $path = $this->storagePath . '/' . $principalBaseName;
+        $path = $this->storagePath.'/'.$principalBaseName;
 
         if (!is_dir($path)) {
             mkdir($path, 0777, true);
         }
+
         return new Collection(
             $path,
             $acl,
             $owner
         );
-
     }
 
-
     /**
      * Returns a list of ACE's for this node.
      *
@@ -113,16 +113,14 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
      *
      * @return array
      */
-    function getACL() {
-
+    public function getACL()
+    {
         return [
             [
                 'principal' => '{DAV:}authenticated',
                 'privilege' => '{DAV:}read',
                 'protected' => true,
-            ]
+            ],
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/IACL.php b/vendor/sabre/dav/lib/DAVACL/IACL.php
index f7a138665..d19a075be 100644
--- a/vendor/sabre/dav/lib/DAVACL/IACL.php
+++ b/vendor/sabre/dav/lib/DAVACL/IACL.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 
 /**
- * ACL-enabled node
+ * ACL-enabled node.
  *
  * If you want to add WebDAV ACL to a node, you must implement this class
  *
@@ -13,25 +15,25 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IACL extends DAV\INode {
-
+interface IACL extends DAV\INode
+{
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner();
+    public function getOwner();
 
     /**
-     * Returns a group principal
+     * Returns a group principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getGroup();
+    public function getGroup();
 
     /**
      * Returns a list of ACE's for this node.
@@ -45,17 +47,16 @@ interface IACL extends DAV\INode {
      *
      * @return array
      */
-    function getACL();
+    public function getACL();
 
     /**
-     * Updates the ACL
+     * Updates the ACL.
      *
      * This method will receive a list of new ACE's as an array argument.
      *
      * @param array $acl
-     * @return void
      */
-    function setACL(array $acl);
+    public function setACL(array $acl);
 
     /**
      * Returns the list of supported privileges for this node.
@@ -69,6 +70,5 @@ interface IACL extends DAV\INode {
      *
      * @return array|null
      */
-    function getSupportedPrivilegeSet();
-
+    public function getSupportedPrivilegeSet();
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/IPrincipal.php b/vendor/sabre/dav/lib/DAVACL/IPrincipal.php
index 13728471e..c804096de 100644
--- a/vendor/sabre/dav/lib/DAVACL/IPrincipal.php
+++ b/vendor/sabre/dav/lib/DAVACL/IPrincipal.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 
 /**
- * IPrincipal interface
+ * IPrincipal interface.
  *
  * Implement this interface to define your own principals
  *
@@ -13,46 +15,46 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IPrincipal extends DAV\INode {
-
+interface IPrincipal extends DAV\INode
+{
     /**
-     * Returns a list of alternative urls for a principal
+     * Returns a list of alternative urls for a principal.
      *
      * This can for example be an email address, or ldap url.
      *
      * @return array
      */
-    function getAlternateUriSet();
+    public function getAlternateUriSet();
 
     /**
-     * Returns the full principal url
+     * Returns the full principal url.
      *
      * @return string
      */
-    function getPrincipalUrl();
+    public function getPrincipalUrl();
 
     /**
-     * Returns the list of group members
+     * Returns the list of group members.
      *
      * If this principal is a group, this function should return
      * all member principal uri's for the group.
      *
      * @return array
      */
-    function getGroupMemberSet();
+    public function getGroupMemberSet();
 
     /**
-     * Returns the list of groups this principal is member of
+     * Returns the list of groups this principal is member of.
      *
      * If this principal is a member of a (list of) groups, this function
      * should return a list of principal uri's for it's members.
      *
      * @return array
      */
-    function getGroupMembership();
+    public function getGroupMembership();
 
     /**
-     * Sets a list of group members
+     * Sets a list of group members.
      *
      * If this principal is a group, this method sets all the group members.
      * The list of members is always overwritten, never appended to.
@@ -60,18 +62,16 @@ interface IPrincipal extends DAV\INode {
      * This method should throw an exception if the members could not be set.
      *
      * @param array $principals
-     * @return void
      */
-    function setGroupMemberSet(array $principals);
+    public function setGroupMemberSet(array $principals);
 
     /**
-     * Returns the displayname
+     * Returns the displayname.
      *
      * This should be a human readable name for the principal.
      * If none is available, return the nodename.
      *
      * @return string
      */
-    function getDisplayName();
-
+    public function getDisplayName();
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/IPrincipalCollection.php b/vendor/sabre/dav/lib/DAVACL/IPrincipalCollection.php
index 3ab8382fa..1003730d6 100644
--- a/vendor/sabre/dav/lib/DAVACL/IPrincipalCollection.php
+++ b/vendor/sabre/dav/lib/DAVACL/IPrincipalCollection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
@@ -14,8 +16,8 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface IPrincipalCollection extends DAV\ICollection {
-
+interface IPrincipalCollection extends DAV\ICollection
+{
     /**
      * This method is used to search for principals matching a set of
      * properties.
@@ -35,11 +37,12 @@ interface IPrincipalCollection extends DAV\ICollection {
      * This method should simply return a list of 'child names', which may be
      * used to call $this->getChild in the future.
      *
-     * @param array $searchProperties
+     * @param array  $searchProperties
      * @param string $test
+     *
      * @return array
      */
-    function searchPrincipals(array $searchProperties, $test = 'allof');
+    public function searchPrincipals(array $searchProperties, $test = 'allof');
 
     /**
      * Finds a principal by its URI.
@@ -55,8 +58,8 @@ interface IPrincipalCollection extends DAV\ICollection {
      * principal was not found or you refuse to find it.
      *
      * @param string $uri
+     *
      * @return string
      */
-    function findByUri($uri);
-
+    public function findByUri($uri);
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Plugin.php b/vendor/sabre/dav/lib/DAVACL/Plugin.php
index a2aa118d7..c1ea6027c 100644
--- a/vendor/sabre/dav/lib/DAVACL/Plugin.php
+++ b/vendor/sabre/dav/lib/DAVACL/Plugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
@@ -15,7 +17,7 @@ use Sabre\HTTP\ResponseInterface;
 use Sabre\Uri;
 
 /**
- * SabreDAV ACL Plugin
+ * SabreDAV ACL Plugin.
  *
  * This plugin provides functionality to enforce ACL permissions.
  * ACL is defined in RFC3744.
@@ -28,24 +30,24 @@ use Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Plugin extends DAV\ServerPlugin {
-
+class Plugin extends DAV\ServerPlugin
+{
     /**
-     * Recursion constants
+     * Recursion constants.
      *
      * This only checks the base node
      */
     const R_PARENT = 1;
 
     /**
-     * Recursion constants
+     * Recursion constants.
      *
      * This checks every node in the tree
      */
     const R_RECURSIVE = 2;
 
     /**
-     * Recursion constants
+     * Recursion constants.
      *
      * This checks every parentnode in the tree, but not leaf-nodes.
      */
@@ -70,7 +72,7 @@ class Plugin extends DAV\ServerPlugin {
 
     /**
      * By default nodes that are inaccessible by the user, can still be seen
-     * in directory listings (PROPFIND on parent with Depth: 1)
+     * in directory listings (PROPFIND on parent with Depth: 1).
      *
      * In certain cases it's desirable to hide inaccessible nodes. Setting this
      * to true will cause these nodes to be hidden from directory listings.
@@ -88,7 +90,7 @@ class Plugin extends DAV\ServerPlugin {
      * @var array
      */
     public $principalSearchPropertySet = [
-        '{DAV:}displayname'                     => 'Display name',
+        '{DAV:}displayname' => 'Display name',
         '{http://sabredav.org/ns}email-address' => 'Email address',
     ];
 
@@ -120,22 +122,21 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['access-control', 'calendarserver-principal-property-search'];
-
     }
 
     /**
-     * Returns a list of available methods for a given url
+     * Returns a list of available methods for a given url.
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getMethods($uri) {
-
+    public function getMethods($uri)
+    {
         return ['ACL'];
-
     }
 
     /**
@@ -146,10 +147,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string
      */
-    function getPluginName() {
-
+    public function getPluginName()
+    {
         return 'acl';
-
     }
 
     /**
@@ -160,20 +160,19 @@ class Plugin extends DAV\ServerPlugin {
      * implement them
      *
      * @param string $uri
+     *
      * @return array
      */
-    function getSupportedReportSet($uri) {
-
+    public function getSupportedReportSet($uri)
+    {
         return [
             '{DAV:}expand-property',
             '{DAV:}principal-match',
             '{DAV:}principal-property-search',
             '{DAV:}principal-search-property-set',
         ];
-
     }
 
-
     /**
      * Checks if the current user has the specified privilege(s).
      *
@@ -181,27 +180,29 @@ class Plugin extends DAV\ServerPlugin {
      * This method will throw an exception if the privilege is not available
      * and return true otherwise.
      *
-     * @param string $uri
+     * @param string       $uri
      * @param array|string $privileges
-     * @param int $recursion
-     * @param bool $throwExceptions if set to false, this method won't throw exceptions.
+     * @param int          $recursion
+     * @param bool         $throwExceptions if set to false, this method won't throw exceptions
+     *
      * @throws NeedPrivileges
      * @throws NotAuthenticated
+     *
      * @return bool
      */
-    function checkPrivileges($uri, $privileges, $recursion = self::R_PARENT, $throwExceptions = true) {
-
-        if (!is_array($privileges)) $privileges = [$privileges];
+    public function checkPrivileges($uri, $privileges, $recursion = self::R_PARENT, $throwExceptions = true)
+    {
+        if (!is_array($privileges)) {
+            $privileges = [$privileges];
+        }
 
         $acl = $this->getCurrentUserPrivilegeSet($uri);
 
         $failed = [];
         foreach ($privileges as $priv) {
-
             if (!in_array($priv, $acl)) {
                 $failed[] = $priv;
             }
-
         }
 
         if ($failed) {
@@ -213,17 +214,16 @@ class Plugin extends DAV\ServerPlugin {
                     $this->server->httpRequest,
                     $this->server->httpResponse
                 );
-                throw new notAuthenticated(implode(', ', $reasons) . '. Login was needed for privilege: ' . implode(', ', $failed) . ' on ' . $uri);
+                throw new notAuthenticated(implode(', ', $reasons).'. Login was needed for privilege: '.implode(', ', $failed).' on '.$uri);
             }
             if ($throwExceptions) {
-
                 throw new NeedPrivileges($uri, $failed);
             } else {
                 return false;
             }
         }
-        return true;
 
+        return true;
     }
 
     /**
@@ -234,35 +234,35 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return string|null
      */
-    function getCurrentUserPrincipal() {
-
+    public function getCurrentUserPrincipal()
+    {
         /** @var $authPlugin \Sabre\DAV\Auth\Plugin */
         $authPlugin = $this->server->getPlugin('auth');
         if (!$authPlugin) {
             return null;
         }
-        return $authPlugin->getCurrentPrincipal();
 
+        return $authPlugin->getCurrentPrincipal();
     }
 
-
     /**
      * Returns a list of principals that's associated to the current
      * user, either directly or through group membership.
      *
      * @return array
      */
-    function getCurrentUserPrincipals() {
-
+    public function getCurrentUserPrincipals()
+    {
         $currentUser = $this->getCurrentUserPrincipal();
 
-        if (is_null($currentUser)) return [];
+        if (is_null($currentUser)) {
+            return [];
+        }
 
         return array_merge(
             [$currentUser],
             $this->getPrincipalMembership($currentUser)
         );
-
     }
 
     /**
@@ -271,12 +271,10 @@ class Plugin extends DAV\ServerPlugin {
      * These rules are used for all nodes that don't implement the IACL interface.
      *
      * @param array $acl
-     * @return void
      */
-    function setDefaultAcl(array $acl) {
-
+    public function setDefaultAcl(array $acl)
+    {
         $this->defaultAcl = $acl;
-
     }
 
     /**
@@ -286,10 +284,9 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getDefaultAcl() {
-
+    public function getDefaultAcl()
+    {
         return $this->defaultAcl;
-
     }
 
     /**
@@ -317,15 +314,15 @@ class Plugin extends DAV\ServerPlugin {
      */
     protected $principalMembershipCache = [];
 
-
     /**
      * Returns all the principal groups the specified principal is a member of.
      *
      * @param string $mainPrincipal
+     *
      * @return array
      */
-    function getPrincipalMembership($mainPrincipal) {
-
+    public function getPrincipalMembership($mainPrincipal)
+    {
         // First check our cache
         if (isset($this->principalMembershipCache[$mainPrincipal])) {
             return $this->principalMembershipCache[$mainPrincipal];
@@ -335,31 +332,23 @@ class Plugin extends DAV\ServerPlugin {
         $principals = [];
 
         while (count($check)) {
-
             $principal = array_shift($check);
 
             $node = $this->server->tree->getNodeForPath($principal);
             if ($node instanceof IPrincipal) {
                 foreach ($node->getGroupMembership() as $groupMember) {
-
                     if (!in_array($groupMember, $principals)) {
-
                         $check[] = $groupMember;
                         $principals[] = $groupMember;
-
                     }
-
                 }
-
             }
-
         }
 
         // Store the result in the cache
         $this->principalMembershipCache[$mainPrincipal] = $principals;
 
         return $principals;
-
     }
 
     /**
@@ -381,24 +370,27 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @param string $checkPrincipal
      * @param string $currentPrincipal
+     *
      * @return bool
      */
-    function principalMatchesPrincipal($checkPrincipal, $currentPrincipal = null) {
-
+    public function principalMatchesPrincipal($checkPrincipal, $currentPrincipal = null)
+    {
         if (is_null($currentPrincipal)) {
             $currentPrincipal = $this->getCurrentUserPrincipal();
         }
         if ($currentPrincipal === $checkPrincipal) {
             return true;
         }
+        if (is_null($currentPrincipal)) {
+            return false;
+        }
+
         return in_array(
             $checkPrincipal,
             $this->getPrincipalMembership($currentPrincipal)
         );
-
     }
 
-
     /**
      * Returns a tree of supported privileges for a resource.
      *
@@ -436,10 +428,11 @@ class Plugin extends DAV\ServerPlugin {
      * ]
      *
      * @param string|INode $node
+     *
      * @return array
      */
-    function getSupportedPrivilegeSet($node) {
-
+    public function getSupportedPrivilegeSet($node)
+    {
         if (is_string($node)) {
             $node = $this->server->tree->getNodeForPath($node);
         }
@@ -450,35 +443,34 @@ class Plugin extends DAV\ServerPlugin {
         }
 
         if (is_null($supportedPrivileges)) {
-
             // Default
             $supportedPrivileges = [
                 '{DAV:}read' => [
-                    'abstract'   => false,
+                    'abstract' => false,
                     'aggregates' => [
                         '{DAV:}read-acl' => [
-                            'abstract'   => false,
+                            'abstract' => false,
                             'aggregates' => [],
                         ],
                         '{DAV:}read-current-user-privilege-set' => [
-                            'abstract'   => false,
+                            'abstract' => false,
                             'aggregates' => [],
                         ],
                     ],
                 ],
                 '{DAV:}write' => [
-                    'abstract'   => false,
+                    'abstract' => false,
                     'aggregates' => [
                         '{DAV:}write-properties' => [
-                            'abstract'   => false,
+                            'abstract' => false,
                             'aggregates' => [],
                         ],
                         '{DAV:}write-content' => [
-                            'abstract'   => false,
+                            'abstract' => false,
                             'aggregates' => [],
                         ],
                         '{DAV:}unlock' => [
-                            'abstract'   => false,
+                            'abstract' => false,
                             'aggregates' => [],
                         ],
                     ],
@@ -486,21 +478,20 @@ class Plugin extends DAV\ServerPlugin {
             ];
             if ($node instanceof DAV\ICollection) {
                 $supportedPrivileges['{DAV:}write']['aggregates']['{DAV:}bind'] = [
-                    'abstract'   => false,
+                    'abstract' => false,
                     'aggregates' => [],
                 ];
                 $supportedPrivileges['{DAV:}write']['aggregates']['{DAV:}unbind'] = [
-                    'abstract'   => false,
+                    'abstract' => false,
                     'aggregates' => [],
                 ];
             }
             if ($node instanceof IACL) {
                 $supportedPrivileges['{DAV:}write']['aggregates']['{DAV:}write-acl'] = [
-                    'abstract'   => false,
+                    'abstract' => false,
                     'aggregates' => [],
                 ];
             }
-
         }
 
         $this->server->emit(
@@ -509,11 +500,10 @@ class Plugin extends DAV\ServerPlugin {
         );
 
         return $supportedPrivileges;
-
     }
 
     /**
-     * Returns the supported privilege set as a flat list
+     * Returns the supported privilege set as a flat list.
      *
      * This is much easier to parse.
      *
@@ -524,54 +514,44 @@ class Plugin extends DAV\ServerPlugin {
      *   - concrete
      *
      * @param string|INode $node
+     *
      * @return array
      */
-    final function getFlatPrivilegeSet($node) {
-
+    final public function getFlatPrivilegeSet($node)
+    {
         $privs = [
-            'abstract'   => false,
-            'aggregates' => $this->getSupportedPrivilegeSet($node)
+            'abstract' => false,
+            'aggregates' => $this->getSupportedPrivilegeSet($node),
         ];
 
         $fpsTraverse = null;
-        $fpsTraverse = function($privName, $privInfo, $concrete, &$flat) use (&$fpsTraverse) {
-
+        $fpsTraverse = function ($privName, $privInfo, $concrete, &$flat) use (&$fpsTraverse) {
             $myPriv = [
-                'privilege'  => $privName,
-                'abstract'   => isset($privInfo['abstract']) && $privInfo['abstract'],
+                'privilege' => $privName,
+                'abstract' => isset($privInfo['abstract']) && $privInfo['abstract'],
                 'aggregates' => [],
-                'concrete'   => isset($privInfo['abstract']) && $privInfo['abstract'] ? $concrete : $privName,
+                'concrete' => isset($privInfo['abstract']) && $privInfo['abstract'] ? $concrete : $privName,
             ];
 
             if (isset($privInfo['aggregates'])) {
-
                 foreach ($privInfo['aggregates'] as $subPrivName => $subPrivInfo) {
-
                     $myPriv['aggregates'][] = $subPrivName;
-
                 }
-
             }
 
             $flat[$privName] = $myPriv;
 
             if (isset($privInfo['aggregates'])) {
-
                 foreach ($privInfo['aggregates'] as $subPrivName => $subPrivInfo) {
-
                     $fpsTraverse($subPrivName, $subPrivInfo, $myPriv['concrete'], $flat);
-
                 }
-
             }
-
         };
 
         $flat = [];
         $fpsTraverse('{DAV:}all', $privs, null, $flat);
 
         return $flat;
-
     }
 
     /**
@@ -582,10 +562,11 @@ class Plugin extends DAV\ServerPlugin {
      * null will be returned if the node doesn't support ACLs.
      *
      * @param string|DAV\INode $node
+     *
      * @return array
      */
-    function getAcl($node) {
-
+    public function getAcl($node)
+    {
         if (is_string($node)) {
             $node = $this->server->tree->getNodeForPath($node);
         }
@@ -600,8 +581,8 @@ class Plugin extends DAV\ServerPlugin {
                 'protected' => true,
             ];
         }
-        return $acl;
 
+        return $acl;
     }
 
     /**
@@ -613,10 +594,11 @@ class Plugin extends DAV\ServerPlugin {
      * null will be returned if the node doesn't support ACLs.
      *
      * @param string|DAV\INode $node
+     *
      * @return array
      */
-    function getCurrentUserPrivilegeSet($node) {
-
+    public function getCurrentUserPrivilegeSet($node)
+    {
         if (is_string($node)) {
             $node = $this->server->tree->getNodeForPath($node);
         }
@@ -625,50 +607,44 @@ class Plugin extends DAV\ServerPlugin {
 
         $collected = [];
 
-        $isAuthenticated = $this->getCurrentUserPrincipal() !== null;
+        $isAuthenticated = null !== $this->getCurrentUserPrincipal();
 
         foreach ($acl as $ace) {
-
             $principal = $ace['principal'];
 
             switch ($principal) {
-
-                case '{DAV:}owner' :
+                case '{DAV:}owner':
                     $owner = $node->getOwner();
                     if ($owner && $this->principalMatchesPrincipal($owner)) {
                         $collected[] = $ace;
                     }
                     break;
 
-
                 // 'all' matches for every user
-                case '{DAV:}all' :
+                case '{DAV:}all':
                     $collected[] = $ace;
                     break;
 
-                case '{DAV:}authenticated' :
+                case '{DAV:}authenticated':
                     // Authenticated users only
                     if ($isAuthenticated) {
                         $collected[] = $ace;
                     }
                     break;
 
-                case '{DAV:}unauthenticated' :
+                case '{DAV:}unauthenticated':
                     // Unauthenticated users only
                     if (!$isAuthenticated) {
                         $collected[] = $ace;
                     }
                     break;
 
-                default :
+                default:
                     if ($this->principalMatchesPrincipal($ace['principal'])) {
                         $collected[] = $ace;
                     }
                     break;
-
             }
-
-
         }
 
         // Now we deduct all aggregated privileges.
@@ -676,41 +652,37 @@ class Plugin extends DAV\ServerPlugin {
 
         $collected2 = [];
         while (count($collected)) {
-
             $current = array_pop($collected);
             $collected2[] = $current['privilege'];
 
             if (!isset($flat[$current['privilege']])) {
                 // Ignoring privileges that are not in the supported-privileges list.
-                $this->server->getLogger()->debug('A node has the "' . $current['privilege'] . '" in its ACL list, but this privilege was not reported in the supportedPrivilegeSet list. This will be ignored.');
+                $this->server->getLogger()->debug('A node has the "'.$current['privilege'].'" in its ACL list, but this privilege was not reported in the supportedPrivilegeSet list. This will be ignored.');
                 continue;
             }
             foreach ($flat[$current['privilege']]['aggregates'] as $subPriv) {
                 $collected2[] = $subPriv;
                 $collected[] = $flat[$subPriv];
             }
-
         }
 
         return array_values(array_unique($collected2));
-
     }
 
-
     /**
      * Returns a principal based on its uri.
      *
      * Returns null if the principal could not be found.
      *
      * @param string $uri
-     * @return null|string
+     *
+     * @return string|null
      */
-    function getPrincipalByUri($uri) {
-
+    public function getPrincipalByUri($uri)
+    {
         $result = null;
         $collections = $this->principalCollectionSet;
         foreach ($collections as $collection) {
-
             try {
                 $principalCollection = $this->server->tree->getNodeForPath($collection);
             } catch (NotFound $e) {
@@ -728,36 +700,35 @@ class Plugin extends DAV\ServerPlugin {
             if ($result) {
                 return $result;
             }
-
         }
-
     }
 
     /**
-     * Principal property search
+     * Principal property search.
      *
      * This method can search for principals matching certain values in
      * properties.
      *
      * This method will return a list of properties for the matched properties.
      *
-     * @param array $searchProperties    The properties to search on. This is a
-     *                                   key-value list. The keys are property
-     *                                   names, and the values the strings to
-     *                                   match them on.
-     * @param array $requestedProperties This is the list of properties to
-     *                                   return for every match.
-     * @param string $collectionUri      The principal collection to search on.
-     *                                   If this is ommitted, the standard
-     *                                   principal collection-set will be used.
-     * @param string $test               "allof" to use AND to search the
-     *                                   properties. 'anyof' for OR.
-     * @return array     This method returns an array structure similar to
-     *                  Sabre\DAV\Server::getPropertiesForPath. Returned
-     *                  properties are index by a HTTP status code.
+     * @param array  $searchProperties    The properties to search on. This is a
+     *                                    key-value list. The keys are property
+     *                                    names, and the values the strings to
+     *                                    match them on.
+     * @param array  $requestedProperties this is the list of properties to
+     *                                    return for every match
+     * @param string $collectionUri       the principal collection to search on.
+     *                                    If this is ommitted, the standard
+     *                                    principal collection-set will be used
+     * @param string $test                "allof" to use AND to search the
+     *                                    properties. 'anyof' for OR.
+     *
+     * @return array This method returns an array structure similar to
+     *               Sabre\DAV\Server::getPropertiesForPath. Returned
+     *               properties are index by a HTTP status code.
      */
-    function principalSearch(array $searchProperties, array $requestedProperties, $collectionUri = null, $test = 'allof') {
-
+    public function principalSearch(array $searchProperties, array $requestedProperties, $collectionUri = null, $test = 'allof')
+    {
         if (!is_null($collectionUri)) {
             $uris = [$collectionUri];
         } else {
@@ -766,7 +737,6 @@ class Plugin extends DAV\ServerPlugin {
 
         $lookupResults = [];
         foreach ($uris as $uri) {
-
             $principalCollection = $this->server->tree->getNodeForPath($uri);
             if (!$principalCollection instanceof IPrincipalCollection) {
                 // Not a principal collection, we're simply going to ignore
@@ -776,33 +746,28 @@ class Plugin extends DAV\ServerPlugin {
 
             $results = $principalCollection->searchPrincipals($searchProperties, $test);
             foreach ($results as $result) {
-                $lookupResults[] = rtrim($uri, '/') . '/' . $result;
+                $lookupResults[] = rtrim($uri, '/').'/'.$result;
             }
-
         }
 
         $matches = [];
 
         foreach ($lookupResults as $lookupResult) {
-
             list($matches[]) = $this->server->getPropertiesForPath($lookupResult, $requestedProperties, 0);
-
         }
 
         return $matches;
-
     }
 
     /**
-     * Sets up the plugin
+     * Sets up the plugin.
      *
      * This method is automatically called by the server class.
      *
      * @param DAV\Server $server
-     * @return void
      */
-    function initialize(DAV\Server $server) {
-
+    public function initialize(DAV\Server $server)
+    {
         if ($this->allowUnauthenticatedAccess) {
             $authPlugin = $server->getPlugin('auth');
             if (!$authPlugin) {
@@ -812,22 +777,22 @@ class Plugin extends DAV\ServerPlugin {
         }
 
         $this->server = $server;
-        $server->on('propFind',            [$this, 'propFind'], 20);
-        $server->on('beforeMethod',        [$this, 'beforeMethod'], 20);
-        $server->on('beforeBind',          [$this, 'beforeBind'], 20);
-        $server->on('beforeUnbind',        [$this, 'beforeUnbind'], 20);
-        $server->on('propPatch',           [$this, 'propPatch']);
-        $server->on('beforeUnlock',        [$this, 'beforeUnlock'], 20);
-        $server->on('report',              [$this, 'report']);
-        $server->on('method:ACL',          [$this, 'httpAcl']);
-        $server->on('onHTMLActionsPanel',  [$this, 'htmlActionsPanel']);
-        $server->on('getPrincipalByUri',  function($principal, &$uri) {
-
+        $server->on('propFind', [$this, 'propFind'], 20);
+        $server->on('beforeMethod:*', [$this, 'beforeMethod'], 20);
+        $server->on('beforeBind', [$this, 'beforeBind'], 20);
+        $server->on('beforeUnbind', [$this, 'beforeUnbind'], 20);
+        $server->on('propPatch', [$this, 'propPatch']);
+        $server->on('beforeUnlock', [$this, 'beforeUnlock'], 20);
+        $server->on('report', [$this, 'report']);
+        $server->on('method:ACL', [$this, 'httpAcl']);
+        $server->on('onHTMLActionsPanel', [$this, 'htmlActionsPanel']);
+        $server->on('getPrincipalByUri', function ($principal, &$uri) {
             $uri = $this->getPrincipalByUri($principal);
 
             // Break event chain
-            if ($uri) return false;
-
+            if ($uri) {
+                return false;
+            }
         });
 
         array_push($server->protectedProperties,
@@ -858,39 +823,38 @@ class Plugin extends DAV\ServerPlugin {
         $server->xml->elementMap['{DAV:}principal-property-search'] = 'Sabre\\DAVACL\\Xml\\Request\\PrincipalPropertySearchReport';
         $server->xml->elementMap['{DAV:}principal-search-property-set'] = 'Sabre\\DAVACL\\Xml\\Request\\PrincipalSearchPropertySetReport';
         $server->xml->elementMap['{DAV:}principal-match'] = 'Sabre\\DAVACL\\Xml\\Request\\PrincipalMatchReport';
-
     }
 
     /* {{{ Event handlers */
 
     /**
-     * Triggered before any method is handled
+     * Triggered before any method is handled.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function beforeMethod(RequestInterface $request, ResponseInterface $response) {
-
+    public function beforeMethod(RequestInterface $request, ResponseInterface $response)
+    {
         $method = $request->getMethod();
         $path = $request->getPath();
 
         $exists = $this->server->tree->nodeExists($path);
 
         // If the node doesn't exists, none of these checks apply
-        if (!$exists) return;
+        if (!$exists) {
+            return;
+        }
 
         switch ($method) {
-
-            case 'GET' :
-            case 'HEAD' :
-            case 'OPTIONS' :
+            case 'GET':
+            case 'HEAD':
+            case 'OPTIONS':
                 // For these 3 we only need to know if the node is readable.
                 $this->checkPrivileges($path, '{DAV:}read');
                 break;
 
-            case 'PUT' :
-            case 'LOCK' :
+            case 'PUT':
+            case 'LOCK':
                 // This method requires the write-content priv if the node
                 // already exists, and bind on the parent if the node is being
                 // created.
@@ -898,20 +862,20 @@ class Plugin extends DAV\ServerPlugin {
                 $this->checkPrivileges($path, '{DAV:}write-content');
                 break;
 
-            case 'UNLOCK' :
+            case 'UNLOCK':
                 // Unlock is always allowed at the moment.
                 break;
 
-            case 'PROPPATCH' :
+            case 'PROPPATCH':
                 $this->checkPrivileges($path, '{DAV:}write-properties');
                 break;
 
-            case 'ACL' :
+            case 'ACL':
                 $this->checkPrivileges($path, '{DAV:}write-acl');
                 break;
 
-            case 'COPY' :
-            case 'MOVE' :
+            case 'COPY':
+            case 'MOVE':
                 // Copy requires read privileges on the entire source tree.
                 // If the target exists write-content normally needs to be
                 // checked, however, we're deleting the node beforehand and
@@ -925,9 +889,7 @@ class Plugin extends DAV\ServerPlugin {
                 // the sourcenode can be deleted.
                 $this->checkPrivileges($path, '{DAV:}read', self::R_RECURSIVE);
                 break;
-
         }
-
     }
 
     /**
@@ -937,54 +899,49 @@ class Plugin extends DAV\ServerPlugin {
      * new node, such as PUT, MKCOL, MKCALENDAR, LOCK, COPY and MOVE.
      *
      * @param string $uri
-     * @return void
      */
-    function beforeBind($uri) {
-
+    public function beforeBind($uri)
+    {
         list($parentUri) = Uri\split($uri);
         $this->checkPrivileges($parentUri, '{DAV:}bind');
-
     }
 
     /**
-     * Triggered before a node is deleted
+     * Triggered before a node is deleted.
      *
      * This allows us to check permissions for any operation that will delete
      * an existing node.
      *
      * @param string $uri
-     * @return void
      */
-    function beforeUnbind($uri) {
-
+    public function beforeUnbind($uri)
+    {
         list($parentUri) = Uri\split($uri);
         $this->checkPrivileges($parentUri, '{DAV:}unbind', self::R_RECURSIVEPARENTS);
-
     }
 
     /**
      * Triggered before a node is unlocked.
      *
-     * @param string $uri
+     * @param string             $uri
      * @param DAV\Locks\LockInfo $lock
      * @TODO: not yet implemented
-     * @return void
      */
-    function beforeUnlock($uri, DAV\Locks\LockInfo $lock) {
-
-
+    public function beforeUnlock($uri, DAV\Locks\LockInfo $lock)
+    {
     }
 
     /**
      * Triggered before properties are looked up in specific nodes.
      *
      * @param DAV\PropFind $propFind
-     * @param DAV\INode $node
+     * @param DAV\INode    $node
      * @TODO really should be broken into multiple methods, or even a class.
+     *
      * @return bool
      */
-    function propFind(DAV\PropFind $propFind, DAV\INode $node) {
-
+    public function propFind(DAV\PropFind $propFind, DAV\INode $node)
+    {
         $path = $propFind->getPath();
 
         // Checking the read permission
@@ -1004,95 +961,95 @@ class Plugin extends DAV\ServerPlugin {
             }
 
             return;
-
         }
 
         /* Adding principal properties */
         if ($node instanceof IPrincipal) {
-
-            $propFind->handle('{DAV:}alternate-URI-set', function() use ($node) {
+            $propFind->handle('{DAV:}alternate-URI-set', function () use ($node) {
                 return new Href($node->getAlternateUriSet());
             });
-            $propFind->handle('{DAV:}principal-URL', function() use ($node) {
-                return new Href($node->getPrincipalUrl() . '/');
+            $propFind->handle('{DAV:}principal-URL', function () use ($node) {
+                return new Href($node->getPrincipalUrl().'/');
             });
-            $propFind->handle('{DAV:}group-member-set', function() use ($node) {
+            $propFind->handle('{DAV:}group-member-set', function () use ($node) {
                 $members = $node->getGroupMemberSet();
                 foreach ($members as $k => $member) {
-                    $members[$k] = rtrim($member, '/') . '/';
+                    $members[$k] = rtrim($member, '/').'/';
                 }
+
                 return new Href($members);
             });
-            $propFind->handle('{DAV:}group-membership', function() use ($node) {
+            $propFind->handle('{DAV:}group-membership', function () use ($node) {
                 $members = $node->getGroupMembership();
                 foreach ($members as $k => $member) {
-                    $members[$k] = rtrim($member, '/') . '/';
+                    $members[$k] = rtrim($member, '/').'/';
                 }
+
                 return new Href($members);
             });
             $propFind->handle('{DAV:}displayname', [$node, 'getDisplayName']);
-
         }
 
-        $propFind->handle('{DAV:}principal-collection-set', function() {
-
+        $propFind->handle('{DAV:}principal-collection-set', function () {
             $val = $this->principalCollectionSet;
             // Ensuring all collections end with a slash
-            foreach ($val as $k => $v) $val[$k] = $v . '/';
-            return new Href($val);
+            foreach ($val as $k => $v) {
+                $val[$k] = $v.'/';
+            }
 
+            return new Href($val);
         });
-        $propFind->handle('{DAV:}current-user-principal', function() {
+        $propFind->handle('{DAV:}current-user-principal', function () {
             if ($url = $this->getCurrentUserPrincipal()) {
-                return new Xml\Property\Principal(Xml\Property\Principal::HREF, $url . '/');
+                return new Xml\Property\Principal(Xml\Property\Principal::HREF, $url.'/');
             } else {
                 return new Xml\Property\Principal(Xml\Property\Principal::UNAUTHENTICATED);
             }
         });
-        $propFind->handle('{DAV:}supported-privilege-set', function() use ($node) {
+        $propFind->handle('{DAV:}supported-privilege-set', function () use ($node) {
             return new Xml\Property\SupportedPrivilegeSet($this->getSupportedPrivilegeSet($node));
         });
-        $propFind->handle('{DAV:}current-user-privilege-set', function() use ($node, $propFind, $path) {
+        $propFind->handle('{DAV:}current-user-privilege-set', function () use ($node, $propFind, $path) {
             if (!$this->checkPrivileges($path, '{DAV:}read-current-user-privilege-set', self::R_PARENT, false)) {
                 $propFind->set('{DAV:}current-user-privilege-set', null, 403);
             } else {
                 $val = $this->getCurrentUserPrivilegeSet($node);
+
                 return new Xml\Property\CurrentUserPrivilegeSet($val);
             }
         });
-        $propFind->handle('{DAV:}acl', function() use ($node, $propFind, $path) {
+        $propFind->handle('{DAV:}acl', function () use ($node, $propFind, $path) {
             /* The ACL property contains all the permissions */
             if (!$this->checkPrivileges($path, '{DAV:}read-acl', self::R_PARENT, false)) {
                 $propFind->set('{DAV:}acl', null, 403);
             } else {
                 $acl = $this->getACL($node);
+
                 return new Xml\Property\Acl($this->getACL($node));
             }
         });
-        $propFind->handle('{DAV:}acl-restrictions', function() {
+        $propFind->handle('{DAV:}acl-restrictions', function () {
             return new Xml\Property\AclRestrictions();
         });
 
         /* Adding ACL properties */
         if ($node instanceof IACL) {
-            $propFind->handle('{DAV:}owner', function() use ($node) {
-                return new Href($node->getOwner() . '/');
+            $propFind->handle('{DAV:}owner', function () use ($node) {
+                return new Href($node->getOwner().'/');
             });
         }
-
     }
 
     /**
      * This method intercepts PROPPATCH methods and make sure the
      * group-member-set is updated correctly.
      *
-     * @param string $path
+     * @param string        $path
      * @param DAV\PropPatch $propPatch
-     * @return void
      */
-    function propPatch($path, DAV\PropPatch $propPatch) {
-
-        $propPatch->handle('{DAV:}group-member-set', function($value) use ($path) {
+    public function propPatch($path, DAV\PropPatch $propPatch)
+    {
+        $propPatch->handle('{DAV:}group-member-set', function ($value) use ($path) {
             if (is_null($value)) {
                 $memberSet = [];
             } elseif ($value instanceof Href) {
@@ -1116,55 +1073,58 @@ class Plugin extends DAV\ServerPlugin {
 
             return true;
         });
-
     }
 
     /**
-     * This method handles HTTP REPORT requests
+     * This method handles HTTP REPORT requests.
      *
      * @param string $reportName
-     * @param mixed $report
-     * @param mixed $path
+     * @param mixed  $report
+     * @param mixed  $path
+     *
      * @return bool
      */
-    function report($reportName, $report, $path) {
-
+    public function report($reportName, $report, $path)
+    {
         switch ($reportName) {
-
-            case '{DAV:}principal-property-search' :
+            case '{DAV:}principal-property-search':
                 $this->server->transactionType = 'report-principal-property-search';
                 $this->principalPropertySearchReport($path, $report);
+
                 return false;
-            case '{DAV:}principal-search-property-set' :
+            case '{DAV:}principal-search-property-set':
                 $this->server->transactionType = 'report-principal-search-property-set';
                 $this->principalSearchPropertySetReport($path, $report);
+
                 return false;
-            case '{DAV:}expand-property' :
+            case '{DAV:}expand-property':
                 $this->server->transactionType = 'report-expand-property';
                 $this->expandPropertyReport($path, $report);
+
                 return false;
-            case '{DAV:}principal-match' :
+            case '{DAV:}principal-match':
                 $this->server->transactionType = 'report-principal-match';
                 $this->principalMatchReport($path, $report);
+
                 return false;
-            case '{DAV:}acl-principal-prop-set' :
+            case '{DAV:}acl-principal-prop-set':
                 $this->server->transactionType = 'acl-principal-prop-set';
                 $this->aclPrincipalPropSetReport($path, $report);
-                return false;
 
+                return false;
         }
-
     }
 
     /**
      * This method is responsible for handling the 'ACL' event.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return bool
      */
-    function httpAcl(RequestInterface $request, ResponseInterface $response) {
-
+    public function httpAcl(RequestInterface $request, ResponseInterface $response)
+    {
         $path = $request->getPath();
         $body = $request->getBodyAsString();
 
@@ -1192,8 +1152,9 @@ class Plugin extends DAV\ServerPlugin {
         /* Checking if protected principals from the existing principal set are
            not overwritten. */
         foreach ($oldAcl as $oldAce) {
-
-            if (!isset($oldAce['protected']) || !$oldAce['protected']) continue;
+            if (!isset($oldAce['protected']) || !$oldAce['protected']) {
+                continue;
+            }
 
             $found = false;
             foreach ($newAcl as $newAce) {
@@ -1201,36 +1162,35 @@ class Plugin extends DAV\ServerPlugin {
                     $newAce['privilege'] === $oldAce['privilege'] &&
                     $newAce['principal'] === $oldAce['principal'] &&
                     $newAce['protected']
-                )
-                $found = true;
+                ) {
+                    $found = true;
+                }
             }
 
-            if (!$found)
+            if (!$found) {
                 throw new Exception\AceConflict('This resource contained a protected {DAV:}ace, but this privilege did not occur in the ACL request');
-
+            }
         }
 
         foreach ($newAcl as $newAce) {
-
             // Do we recognize the privilege
             if (!isset($supportedPrivileges[$newAce['privilege']])) {
-                throw new Exception\NotSupportedPrivilege('The privilege you specified (' . $newAce['privilege'] . ') is not recognized by this server');
+                throw new Exception\NotSupportedPrivilege('The privilege you specified ('.$newAce['privilege'].') is not recognized by this server');
             }
 
             if ($supportedPrivileges[$newAce['privilege']]['abstract']) {
-                throw new Exception\NoAbstract('The privilege you specified (' . $newAce['privilege'] . ') is an abstract privilege');
+                throw new Exception\NoAbstract('The privilege you specified ('.$newAce['privilege'].') is an abstract privilege');
             }
 
             // Looking up the principal
             try {
                 $principal = $this->server->tree->getNodeForPath($newAce['principal']);
             } catch (NotFound $e) {
-                throw new Exception\NotRecognizedPrincipal('The specified principal (' . $newAce['principal'] . ') does not exist');
+                throw new Exception\NotRecognizedPrincipal('The specified principal ('.$newAce['principal'].') does not exist');
             }
             if (!($principal instanceof IPrincipal)) {
-                throw new Exception\NotRecognizedPrincipal('The specified uri (' . $newAce['principal'] . ') is not a principal');
+                throw new Exception\NotRecognizedPrincipal('The specified uri ('.$newAce['principal'].') is not a principal');
             }
-
         }
         $node->setACL($newAcl);
 
@@ -1238,7 +1198,6 @@ class Plugin extends DAV\ServerPlugin {
 
         // Breaking the event chain, because we handled this method.
         return false;
-
     }
 
     /* }}} */
@@ -1252,14 +1211,13 @@ class Plugin extends DAV\ServerPlugin {
      * or a principal URL, the principal URL and principal URLs of groups that
      * principal belongs to.
      *
-     * @param string $path
+     * @param string                           $path
      * @param Xml\Request\PrincipalMatchReport $report
-     * @return void
      */
-    protected function principalMatchReport($path, Xml\Request\PrincipalMatchReport $report) {
-
+    protected function principalMatchReport($path, Xml\Request\PrincipalMatchReport $report)
+    {
         $depth = $this->server->getHTTPDepth(0);
-        if ($depth !== 0) {
+        if (0 !== $depth) {
             throw new BadRequest('The principal-match report is only defined on Depth: 0');
         }
 
@@ -1267,20 +1225,15 @@ class Plugin extends DAV\ServerPlugin {
 
         $result = [];
 
-        if ($report->type === Xml\Request\PrincipalMatchReport::SELF) {
-
+        if (Xml\Request\PrincipalMatchReport::SELF === $report->type) {
             // Finding all principals under the request uri that match the
             // current principal.
             foreach ($currentPrincipals as $currentPrincipal) {
-
-                if ($currentPrincipal === $path || strpos($currentPrincipal, $path . '/') === 0) {
+                if ($currentPrincipal === $path || 0 === strpos($currentPrincipal, $path.'/')) {
                     $result[] = $currentPrincipal;
                 }
-
             }
-
         } else {
-
             // We need to find all resources that have a property that matches
             // one of the current principals.
             $candidates = $this->server->getPropertiesForPath(
@@ -1290,7 +1243,6 @@ class Plugin extends DAV\ServerPlugin {
             );
 
             foreach ($candidates as $candidate) {
-
                 if (!isset($candidate[200][$report->principalProperty])) {
                     continue;
                 }
@@ -1308,23 +1260,19 @@ class Plugin extends DAV\ServerPlugin {
                     }
                 }
             }
-
         }
 
         $responses = [];
 
         foreach ($result as $item) {
-
             $properties = [];
 
             if ($report->properties) {
-
                 $foo = $this->server->getPropertiesForPath($item, $report->properties);
                 $foo = $foo[0];
                 $item = $foo['href'];
                 unset($foo['href']);
                 $properties = $foo;
-
             }
 
             $responses[] = new DAV\Xml\Element\Response(
@@ -1332,7 +1280,6 @@ class Plugin extends DAV\ServerPlugin {
                 $properties,
                 '200'
             );
-
         }
 
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
@@ -1344,8 +1291,6 @@ class Plugin extends DAV\ServerPlugin {
                 $this->server->getBaseUri()
             )
         );
-
-
     }
 
     /**
@@ -1359,12 +1304,11 @@ class Plugin extends DAV\ServerPlugin {
      * Other rfc's, such as ACL rely on this report, so it made sense to put
      * it in this plugin.
      *
-     * @param string $path
+     * @param string                           $path
      * @param Xml\Request\ExpandPropertyReport $report
-     * @return void
      */
-    protected function expandPropertyReport($path, $report) {
-
+    protected function expandPropertyReport($path, $report)
+    {
         $depth = $this->server->getHTTPDepth(0);
 
         $result = $this->expandProperties($path, $report->properties, $depth);
@@ -1377,34 +1321,36 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setStatus(207);
         $this->server->httpResponse->setBody($xml);
-
     }
 
     /**
      * This method expands all the properties and returns
-     * a list with property values
+     * a list with property values.
      *
      * @param array $path
      * @param array $requestedProperties the list of required properties
-     * @param int $depth
+     * @param int   $depth
+     *
      * @return array
      */
-    protected function expandProperties($path, array $requestedProperties, $depth) {
-
+    protected function expandProperties($path, array $requestedProperties, $depth)
+    {
         $foundProperties = $this->server->getPropertiesForPath($path, array_keys($requestedProperties), $depth);
 
         $result = [];
 
         foreach ($foundProperties as $node) {
-
             foreach ($requestedProperties as $propertyName => $childRequestedProperties) {
-
                 // We're only traversing if sub-properties were requested
-                if (count($childRequestedProperties) === 0) continue;
+                if (!is_array($childRequestedProperties) || 0 === count($childRequestedProperties)) {
+                    continue;
+                }
 
                 // We only have to do the expansion if the property was found
                 // and it contains an href element.
-                if (!array_key_exists($propertyName, $node[200])) continue;
+                if (!array_key_exists($propertyName, $node[200])) {
+                    continue;
+                }
 
                 if (!$node[200][$propertyName] instanceof DAV\Xml\Property\Href) {
                     continue;
@@ -1416,39 +1362,35 @@ class Plugin extends DAV\ServerPlugin {
                 foreach ($childHrefs as $href) {
                     // Gathering the result of the children
                     $childProps[] = [
-                        'name'  => '{DAV:}response',
-                        'value' => $this->expandProperties($href, $childRequestedProperties, 0)[0]
+                        'name' => '{DAV:}response',
+                        'value' => $this->expandProperties($href, $childRequestedProperties, 0)[0],
                     ];
                 }
 
                 // Replacing the property with its expanded form.
                 $node[200][$propertyName] = $childProps;
-
             }
             $result[] = new DAV\Xml\Element\Response($node['href'], $node);
-
         }
 
         return $result;
-
     }
 
     /**
-     * principalSearchPropertySetReport
+     * principalSearchPropertySetReport.
      *
      * This method responsible for handing the
      * {DAV:}principal-search-property-set report. This report returns a list
      * of properties the client may search on, using the
      * {DAV:}principal-property-search report.
      *
-     * @param string $path
+     * @param string                                       $path
      * @param Xml\Request\PrincipalSearchPropertySetReport $report
-     * @return void
      */
-    protected function principalSearchPropertySetReport($path, $report) {
-
+    protected function principalSearchPropertySetReport($path, $report)
+    {
         $httpDepth = $this->server->getHTTPDepth(0);
-        if ($httpDepth !== 0) {
+        if (0 !== $httpDepth) {
             throw new DAV\Exception\BadRequest('This report is only defined when Depth: 0');
         }
 
@@ -1459,7 +1401,6 @@ class Plugin extends DAV\ServerPlugin {
         $writer->startElement('{DAV:}principal-search-property-set');
 
         foreach ($this->principalSearchPropertySet as $propertyName => $description) {
-
             $writer->startElement('{DAV:}principal-search-property');
             $writer->startElement('{DAV:}prop');
 
@@ -1469,15 +1410,13 @@ class Plugin extends DAV\ServerPlugin {
 
             if ($description) {
                 $writer->write([[
-                    'name'       => '{DAV:}description',
-                    'value'      => $description,
-                    'attributes' => ['xml:lang' => 'en']
+                    'name' => '{DAV:}description',
+                    'value' => $description,
+                    'attributes' => ['xml:lang' => 'en'],
                 ]]);
             }
 
             $writer->endElement(); // principal-search-property
-
-
         }
 
         $writer->endElement(); // principal-search-property-set
@@ -1485,27 +1424,25 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setStatus(200);
         $this->server->httpResponse->setBody($writer->outputMemory());
-
     }
 
     /**
-     * principalPropertySearchReport
+     * principalPropertySearchReport.
      *
      * This method is responsible for handing the
      * {DAV:}principal-property-search report. This report can be used for
      * clients to search for groups of principals, based on the value of one
      * or more properties.
      *
-     * @param string $path
+     * @param string                                    $path
      * @param Xml\Request\PrincipalPropertySearchReport $report
-     * @return void
      */
-    protected function principalPropertySearchReport($path, Xml\Request\PrincipalPropertySearchReport $report) {
-
+    protected function principalPropertySearchReport($path, Xml\Request\PrincipalPropertySearchReport $report)
+    {
         if ($report->applyToPrincipalCollectionSet) {
             $path = null;
         }
-        if ($this->server->getHttpDepth('0') !== 0) {
+        if (0 !== $this->server->getHttpDepth('0')) {
             throw new BadRequest('Depth must be 0');
         }
         $result = $this->principalSearch(
@@ -1520,12 +1457,11 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setStatus(207);
         $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
         $this->server->httpResponse->setHeader('Vary', 'Brief,Prefer');
-        $this->server->httpResponse->setBody($this->server->generateMultiStatus($result, $prefer['return'] === 'minimal'));
-
+        $this->server->httpResponse->setBody($this->server->generateMultiStatus($result, 'minimal' === $prefer['return']));
     }
 
     /**
-     * aclPrincipalPropSet REPORT
+     * aclPrincipalPropSet REPORT.
      *
      * This method is responsible for handling the {DAV:}acl-principal-prop-set
      * REPORT, as defined in:
@@ -1537,13 +1473,12 @@ class Plugin extends DAV\ServerPlugin {
      * is used to for example generate a UI with ACL rules, allowing you
      * to show names for principals for every entry.
      *
-     * @param string $path
+     * @param string                                $path
      * @param Xml\Request\AclPrincipalPropSetReport $report
-     * @return void
      */
-    protected function aclPrincipalPropSetReport($path, Xml\Request\AclPrincipalPropSetReport $report) {
-
-        if ($this->server->getHTTPDepth(0) !== 0) {
+    protected function aclPrincipalPropSetReport($path, Xml\Request\AclPrincipalPropSetReport $report)
+    {
+        if (0 !== $this->server->getHTTPDepth(0)) {
             throw new BadRequest('The {DAV:}acl-principal-prop-set REPORT only supports Depth 0');
         }
 
@@ -1558,14 +1493,12 @@ class Plugin extends DAV\ServerPlugin {
 
         $principals = [];
         foreach ($acl['{DAV:}acl']->getPrivileges() as $ace) {
-
-            if ($ace['principal'][0] === '{') {
+            if ('{' === $ace['principal'][0]) {
                 // It's not a principal, it's one of the special rules such as {DAV:}authenticated
                 continue;
             }
 
             $principals[] = $ace['principal'];
-
         }
 
         $properties = $this->server->getPropertiesForMultiplePaths(
@@ -1578,10 +1511,8 @@ class Plugin extends DAV\ServerPlugin {
         $this->server->httpResponse->setBody(
             $this->server->generateMultiStatus($properties)
         );
-
     }
 
-
     /* }}} */
 
     /**
@@ -1590,13 +1521,15 @@ class Plugin extends DAV\ServerPlugin {
      * can use to create new calendars.
      *
      * @param DAV\INode $node
-     * @param string $output
+     * @param string    $output
+     *
      * @return bool
      */
-    function htmlActionsPanel(DAV\INode $node, &$output) {
-
-        if (!$node instanceof PrincipalCollection)
+    public function htmlActionsPanel(DAV\INode $node, &$output)
+    {
+        if (!$node instanceof PrincipalCollection) {
             return;
+        }
 
         $output .= '<tr><td colspan="2"><form method="post" action="">
             <h3>Create new principal</h3>
@@ -1610,7 +1543,6 @@ class Plugin extends DAV\ServerPlugin {
             </td></tr>';
 
         return false;
-
     }
 
     /**
@@ -1624,13 +1556,12 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @return array
      */
-    function getPluginInfo() {
-
+    public function getPluginInfo()
+    {
         return [
-            'name'        => $this->getPluginName(),
+            'name' => $this->getPluginName(),
             'description' => 'Adds support for WebDAV ACL (rfc3744)',
-            'link'        => 'http://sabre.io/dav/acl/',
+            'link' => 'http://sabre.io/dav/acl/',
         ];
-
     }
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Principal.php b/vendor/sabre/dav/lib/DAVACL/Principal.php
index d7db94999..e2df1c35e 100644
--- a/vendor/sabre/dav/lib/DAVACL/Principal.php
+++ b/vendor/sabre/dav/lib/DAVACL/Principal.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
- * Principal class
+ * Principal class.
  *
  * This class is a representation of a simple principal
  *
@@ -20,8 +22,8 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL {
-
+class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL
+{
     use ACLTrait;
 
     /**
@@ -32,93 +34,86 @@ class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL {
     protected $principalProperties;
 
     /**
-     * Principal backend
+     * Principal backend.
      *
      * @var PrincipalBackend\BackendInterface
      */
     protected $principalBackend;
 
     /**
-     * Creates the principal object
+     * Creates the principal object.
      *
      * @param PrincipalBackend\BackendInterface $principalBackend
-     * @param array $principalProperties
+     * @param array                             $principalProperties
      */
-    function __construct(PrincipalBackend\BackendInterface $principalBackend, array $principalProperties = []) {
-
+    public function __construct(PrincipalBackend\BackendInterface $principalBackend, array $principalProperties = [])
+    {
         if (!isset($principalProperties['uri'])) {
             throw new DAV\Exception('The principal properties must at least contain the \'uri\' key');
         }
         $this->principalBackend = $principalBackend;
         $this->principalProperties = $principalProperties;
-
     }
 
     /**
-     * Returns the full principal url
+     * Returns the full principal url.
      *
      * @return string
      */
-    function getPrincipalUrl() {
-
+    public function getPrincipalUrl()
+    {
         return $this->principalProperties['uri'];
-
     }
 
     /**
-     * Returns a list of alternative urls for a principal
+     * Returns a list of alternative urls for a principal.
      *
      * This can for example be an email address, or ldap url.
      *
      * @return array
      */
-    function getAlternateUriSet() {
-
+    public function getAlternateUriSet()
+    {
         $uris = [];
         if (isset($this->principalProperties['{DAV:}alternate-URI-set'])) {
-
             $uris = $this->principalProperties['{DAV:}alternate-URI-set'];
-
         }
 
         if (isset($this->principalProperties['{http://sabredav.org/ns}email-address'])) {
-            $uris[] = 'mailto:' . $this->principalProperties['{http://sabredav.org/ns}email-address'];
+            $uris[] = 'mailto:'.$this->principalProperties['{http://sabredav.org/ns}email-address'];
         }
 
         return array_unique($uris);
-
     }
 
     /**
-     * Returns the list of group members
+     * Returns the list of group members.
      *
      * If this principal is a group, this function should return
      * all member principal uri's for the group.
      *
      * @return array
      */
-    function getGroupMemberSet() {
-
+    public function getGroupMemberSet()
+    {
         return $this->principalBackend->getGroupMemberSet($this->principalProperties['uri']);
-
     }
 
     /**
-     * Returns the list of groups this principal is member of
+     * Returns the list of groups this principal is member of.
      *
      * If this principal is a member of a (list of) groups, this function
      * should return a list of principal uri's for it's members.
      *
      * @return array
      */
-    function getGroupMembership() {
-
+    public function getGroupMembership()
+    {
         return $this->principalBackend->getGroupMemberShip($this->principalProperties['uri']);
-
     }
 
     /**
-     * Sets a list of group members
+     * Sets a list of group members.
      *
      * If this principal is a group, this method sets all the group members.
      * The list of members is always overwritten, never appended to.
@@ -126,12 +121,10 @@ class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL {
      * This method should throw an exception if the members could not be set.
      *
      * @param array $groupMembers
-     * @return void
      */
-    function setGroupMemberSet(array $groupMembers) {
-
+    public function setGroupMemberSet(array $groupMembers)
+    {
         $this->principalBackend->setGroupMemberSet($this->principalProperties['uri'], $groupMembers);
-
     }
 
     /**
@@ -139,48 +132,45 @@ class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         $uri = $this->principalProperties['uri'];
-        list(, $name) = URLUtil::splitPath($uri);
-        return $name;
+        list(, $name) = Uri\split($uri);
 
+        return $name;
     }
 
     /**
-     * Returns the name of the user
+     * Returns the name of the user.
      *
      * @return string
      */
-    function getDisplayName() {
-
+    public function getDisplayName()
+    {
         if (isset($this->principalProperties['{DAV:}displayname'])) {
             return $this->principalProperties['{DAV:}displayname'];
         } else {
             return $this->getName();
         }
-
     }
 
     /**
-     * Returns a list of properties
+     * Returns a list of properties.
      *
      * @param array $requestedProperties
+     *
      * @return array
      */
-    function getProperties($requestedProperties) {
-
+    public function getProperties($requestedProperties)
+    {
         $newProperties = [];
         foreach ($requestedProperties as $propName) {
-
             if (isset($this->principalProperties[$propName])) {
                 $newProperties[$propName] = $this->principalProperties[$propName];
             }
-
         }
 
         return $newProperties;
-
     }
 
     /**
@@ -193,29 +183,24 @@ class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL {
      * Read the PropPatch documentation for more information.
      *
      * @param DAV\PropPatch $propPatch
-     * @return void
      */
-    function propPatch(DAV\PropPatch $propPatch) {
-
+    public function propPatch(DAV\PropPatch $propPatch)
+    {
         return $this->principalBackend->updatePrincipal(
             $this->principalProperties['uri'],
             $propPatch
         );
-
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner principal.
      *
      * This must be a url to a principal, or null if there's no owner
      *
      * @return string|null
      */
-    function getOwner() {
-
+    public function getOwner()
+    {
         return $this->principalProperties['uri'];
-
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/AbstractBackend.php b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/AbstractBackend.php
index 9bf9ba445..03a9c4bad 100644
--- a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/AbstractBackend.php
+++ b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/AbstractBackend.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\PrincipalBackend;
 
 /**
- * Abstract Principal Backend
+ * Abstract Principal Backend.
  *
  * Currently this class has no function. It's here for consistency and so we
  * have a non-bc-breaking way to add a default generic implementation to
@@ -13,8 +15,8 @@ namespace Sabre\DAVACL\PrincipalBackend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractBackend implements BackendInterface {
-
+abstract class AbstractBackend implements BackendInterface
+{
     /**
      * Finds a principal by its URI.
      *
@@ -30,13 +32,14 @@ abstract class AbstractBackend implements BackendInterface {
      *
      * @param string $uri
      * @param string $principalPrefix
+     *
      * @return string
      */
-    function findByUri($uri, $principalPrefix) {
-
+    public function findByUri($uri, $principalPrefix)
+    {
         // Note that the default implementation here is a bit slow and could
         // likely be optimized.
-        if (substr($uri, 0, 7) !== 'mailto:') {
+        if ('mailto:' !== substr($uri, 0, 7)) {
             return;
         }
         $result = $this->searchPrincipals(
@@ -47,7 +50,5 @@ abstract class AbstractBackend implements BackendInterface {
         if ($result) {
             return $result[0];
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/BackendInterface.php b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/BackendInterface.php
index 40b6e33ea..40ac272b5 100644
--- a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/BackendInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\PrincipalBackend;
 
 /**
@@ -13,8 +15,8 @@ namespace Sabre\DAVACL\PrincipalBackend;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface BackendInterface {
-
+interface BackendInterface
+{
     /**
      * Returns a list of principals based on a prefix.
      *
@@ -29,9 +31,10 @@ interface BackendInterface {
      *     you have an email address, use this property.
      *
      * @param string $prefixPath
+     *
      * @return array
      */
-    function getPrincipalsByPrefix($prefixPath);
+    public function getPrincipalsByPrefix($prefixPath);
 
     /**
      * Returns a specific principal, specified by it's path.
@@ -39,9 +42,10 @@ interface BackendInterface {
      * getPrincipalsByPrefix.
      *
      * @param string $path
+     *
      * @return array
      */
-    function getPrincipalByPath($path);
+    public function getPrincipalByPath($path);
 
     /**
      * Updates one ore more webdav properties on a principal.
@@ -55,11 +59,10 @@ interface BackendInterface {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param string $path
+     * @param string               $path
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updatePrincipal($path, \Sabre\DAV\PropPatch $propPatch);
+    public function updatePrincipal($path, \Sabre\DAV\PropPatch $propPatch);
 
     /**
      * This method is used to search for principals matching a set of
@@ -86,11 +89,12 @@ interface BackendInterface {
      * from working.
      *
      * @param string $prefixPath
-     * @param array $searchProperties
+     * @param array  $searchProperties
      * @param string $test
+     *
      * @return array
      */
-    function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof');
+    public function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof');
 
     /**
      * Finds a principal by its URI.
@@ -107,25 +111,28 @@ interface BackendInterface {
      *
      * @param string $uri
      * @param string $principalPrefix
+     *
      * @return string
      */
-    function findByUri($uri, $principalPrefix);
+    public function findByUri($uri, $principalPrefix);
 
     /**
-     * Returns the list of members for a group-principal
+     * Returns the list of members for a group-principal.
      *
      * @param string $principal
+     *
      * @return array
      */
-    function getGroupMemberSet($principal);
+    public function getGroupMemberSet($principal);
 
     /**
-     * Returns the list of groups a principal is a member of
+     * Returns the list of groups a principal is a member of.
      *
      * @param string $principal
+     *
      * @return array
      */
-    function getGroupMembership($principal);
+    public function getGroupMembership($principal);
 
     /**
      * Updates the list of group members for a group principal.
@@ -133,9 +140,7 @@ interface BackendInterface {
      * The principals should be passed as a list of uri's.
      *
      * @param string $principal
-     * @param array $members
-     * @return void
+     * @param array  $members
      */
-    function setGroupMemberSet($principal, array $members);
-
+    public function setGroupMemberSet($principal, array $members);
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/CreatePrincipalSupport.php b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/CreatePrincipalSupport.php
index e354a697d..ee418e49b 100644
--- a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/CreatePrincipalSupport.php
+++ b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/CreatePrincipalSupport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\PrincipalBackend;
 
 use Sabre\DAV\MkCol;
@@ -12,8 +14,8 @@ use Sabre\DAV\MkCol;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface CreatePrincipalSupport extends BackendInterface {
-
+interface CreatePrincipalSupport extends BackendInterface
+{
     /**
      * Creates a new principal.
      *
@@ -22,9 +24,7 @@ interface CreatePrincipalSupport extends BackendInterface {
      * of the principal.
      *
      * @param string $path
-     * @param MkCol $mkCol
-     * @return void
+     * @param MkCol  $mkCol
      */
-    function createPrincipal($path, MkCol $mkCol);
-
+    public function createPrincipal($path, MkCol $mkCol);
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php
index eb0df888b..350ecb145 100644
--- a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php
+++ b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\PrincipalBackend;
 
 use Sabre\DAV;
 use Sabre\DAV\MkCol;
-use Sabre\HTTP\URLUtil;
+use Sabre\Uri;
 
 /**
- * PDO principal backend
+ * PDO principal backend.
  *
  *
  * This backend assumes all principals are in a single collection. The default collection
@@ -17,44 +19,43 @@ use Sabre\HTTP\URLUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PDO extends AbstractBackend implements CreatePrincipalSupport {
-
+class PDO extends AbstractBackend implements CreatePrincipalSupport
+{
     /**
-     * PDO table name for 'principals'
+     * PDO table name for 'principals'.
      *
      * @var string
      */
     public $tableName = 'principals';
 
     /**
-     * PDO table name for 'group members'
+     * PDO table name for 'group members'.
      *
      * @var string
      */
     public $groupMembersTableName = 'groupmembers';
 
     /**
-     * pdo
+     * pdo.
      *
      * @var PDO
      */
     protected $pdo;
 
     /**
-     * A list of additional fields to support
+     * A list of additional fields to support.
      *
      * @var array
      */
     protected $fieldMap = [
-
-        /**
+        /*
          * This property can be used to display the users' real name.
          */
         '{DAV:}displayname' => [
             'dbField' => 'displayname',
         ],
 
-        /**
+        /*
          * This is the users' primary email-address.
          */
         '{http://sabredav.org/ns}email-address' => [
@@ -67,10 +68,9 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      *
      * @param \PDO $pdo
      */
-    function __construct(\PDO $pdo) {
-
+    public function __construct(\PDO $pdo)
+    {
         $this->pdo = $pdo;
-
     }
 
     /**
@@ -87,10 +87,11 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      *     you have an email address, use this property.
      *
      * @param string $prefixPath
+     *
      * @return array
      */
-    function getPrincipalsByPrefix($prefixPath) {
-
+    public function getPrincipalsByPrefix($prefixPath)
+    {
         $fields = [
             'uri',
         ];
@@ -98,15 +99,16 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
         foreach ($this->fieldMap as $key => $value) {
             $fields[] = $value['dbField'];
         }
-        $result = $this->pdo->query('SELECT ' . implode(',', $fields) . '  FROM ' . $this->tableName);
+        $result = $this->pdo->query('SELECT '.implode(',', $fields).'  FROM '.$this->tableName);
 
         $principals = [];
 
         while ($row = $result->fetch(\PDO::FETCH_ASSOC)) {
-
             // Checking if the principal is in the prefix
-            list($rowPrefix) = URLUtil::splitPath($row['uri']);
-            if ($rowPrefix !== $prefixPath) continue;
+            list($rowPrefix) = Uri\split($row['uri']);
+            if ($rowPrefix !== $prefixPath) {
+                continue;
+            }
 
             $principal = [
                 'uri' => $row['uri'],
@@ -117,11 +119,9 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
                 }
             }
             $principals[] = $principal;
-
         }
 
         return $principals;
-
     }
 
     /**
@@ -130,10 +130,11 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      * getPrincipalsByPrefix.
      *
      * @param string $path
+     *
      * @return array
      */
-    function getPrincipalByPath($path) {
-
+    public function getPrincipalByPath($path)
+    {
         $fields = [
             'id',
             'uri',
@@ -142,14 +143,16 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
         foreach ($this->fieldMap as $key => $value) {
             $fields[] = $value['dbField'];
         }
-        $stmt = $this->pdo->prepare('SELECT ' . implode(',', $fields) . '  FROM ' . $this->tableName . ' WHERE uri = ?');
+        $stmt = $this->pdo->prepare('SELECT '.implode(',', $fields).'  FROM '.$this->tableName.' WHERE uri = ?');
         $stmt->execute([$path]);
 
         $row = $stmt->fetch(\PDO::FETCH_ASSOC);
-        if (!$row) return;
+        if (!$row) {
+            return;
+        }
 
         $principal = [
-            'id'  => $row['id'],
+            'id' => $row['id'],
             'uri' => $row['uri'],
         ];
         foreach ($this->fieldMap as $key => $value) {
@@ -157,8 +160,8 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
                 $principal[$key] = $row[$value['dbField']];
             }
         }
-        return $principal;
 
+        return $principal;
     }
 
     /**
@@ -173,41 +176,36 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param string $path
+     * @param string        $path
      * @param DAV\PropPatch $propPatch
      */
-    function updatePrincipal($path, DAV\PropPatch $propPatch) {
-
-        $propPatch->handle(array_keys($this->fieldMap), function($properties) use ($path) {
-
-            $query = "UPDATE " . $this->tableName . " SET ";
+    public function updatePrincipal($path, DAV\PropPatch $propPatch)
+    {
+        $propPatch->handle(array_keys($this->fieldMap), function ($properties) use ($path) {
+            $query = 'UPDATE '.$this->tableName.' SET ';
             $first = true;
 
             $values = [];
 
             foreach ($properties as $key => $value) {
-
                 $dbField = $this->fieldMap[$key]['dbField'];
 
                 if (!$first) {
                     $query .= ', ';
                 }
                 $first = false;
-                $query .= $dbField . ' = :' . $dbField;
+                $query .= $dbField.' = :'.$dbField;
                 $values[$dbField] = $value;
-
             }
 
-            $query .= " WHERE uri = :uri";
+            $query .= ' WHERE uri = :uri';
             $values['uri'] = $path;
 
             $stmt = $this->pdo->prepare($query);
             $stmt->execute($values);
 
             return true;
-
         });
-
     }
 
     /**
@@ -235,48 +233,52 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      * from working.
      *
      * @param string $prefixPath
-     * @param array $searchProperties
+     * @param array  $searchProperties
      * @param string $test
+     *
      * @return array
      */
-    function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof') {
-        if (count($searchProperties) == 0) return [];    //No criteria
+    public function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof')
+    {
+        if (0 == count($searchProperties)) {
+            return [];
+        }    //No criteria
 
-        $query = 'SELECT uri FROM ' . $this->tableName . ' WHERE ';
+        $query = 'SELECT uri FROM '.$this->tableName.' WHERE ';
         $values = [];
         foreach ($searchProperties as $property => $value) {
             switch ($property) {
-                case '{DAV:}displayname' :
-                    $column = "displayname";
+                case '{DAV:}displayname':
+                    $column = 'displayname';
                     break;
-                case '{http://sabredav.org/ns}email-address' :
-                    $column = "email";
+                case '{http://sabredav.org/ns}email-address':
+                    $column = 'email';
                     break;
-                default :
+                default:
                     // Unsupported property
                     return [];
             }
-            if (count($values) > 0) $query .= (strcmp($test, "anyof") == 0 ? " OR " : " AND ");
-            $query .= 'lower(' . $column . ') LIKE lower(?)';
-            $values[] = '%' . $value . '%';
-
+            if (count($values) > 0) {
+                $query .= (0 == strcmp($test, 'anyof') ? ' OR ' : ' AND ');
+            }
+            $query .= 'lower('.$column.') LIKE lower(?)';
+            $values[] = '%'.$value.'%';
         }
         $stmt = $this->pdo->prepare($query);
         $stmt->execute($values);
 
         $principals = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
             // Checking if the principal is in the prefix
-            list($rowPrefix) = URLUtil::splitPath($row['uri']);
-            if ($rowPrefix !== $prefixPath) continue;
+            list($rowPrefix) = Uri\split($row['uri']);
+            if ($rowPrefix !== $prefixPath) {
+                continue;
+            }
 
             $principals[] = $row['uri'];
-
         }
 
         return $principals;
-
     }
 
     /**
@@ -294,26 +296,32 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      *
      * @param string $uri
      * @param string $principalPrefix
+     *
      * @return string
      */
-    function findByUri($uri, $principalPrefix) {
+    public function findByUri($uri, $principalPrefix)
+    {
         $value = null;
         $scheme = null;
-        list($scheme, $value) = explode(":", $uri, 2);
-        if (empty($value)) return null;
+        list($scheme, $value) = explode(':', $uri, 2);
+        if (empty($value)) {
+            return null;
+        }
 
         $uri = null;
-        switch ($scheme){
-            case "mailto":
-                $query = 'SELECT uri FROM ' . $this->tableName . ' WHERE lower(email)=lower(?)';
+        switch ($scheme) {
+            case 'mailto':
+                $query = 'SELECT uri FROM '.$this->tableName.' WHERE lower(email)=lower(?)';
                 $stmt = $this->pdo->prepare($query);
                 $stmt->execute([$value]);
-            
+
                 while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
                     // Checking if the principal is in the prefix
-                    list($rowPrefix) = URLUtil::splitPath($row['uri']);
-                    if ($rowPrefix !== $principalPrefix) continue;
-                    
+                    list($rowPrefix) = Uri\split($row['uri']);
+                    if ($rowPrefix !== $principalPrefix) {
+                        continue;
+                    }
+
                     $uri = $row['uri'];
                     break; //Stop on first match
                 }
@@ -322,51 +330,56 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
                 //unsupported uri scheme
                 return null;
         }
+
         return $uri;
     }
 
     /**
-     * Returns the list of members for a group-principal
+     * Returns the list of members for a group-principal.
      *
      * @param string $principal
+     *
      * @return array
      */
-    function getGroupMemberSet($principal) {
-
+    public function getGroupMemberSet($principal)
+    {
         $principal = $this->getPrincipalByPath($principal);
-        if (!$principal) throw new DAV\Exception('Principal not found');
-
-        $stmt = $this->pdo->prepare('SELECT principals.uri as uri FROM ' . $this->groupMembersTableName . ' AS groupmembers LEFT JOIN ' . $this->tableName . ' AS principals ON groupmembers.member_id = principals.id WHERE groupmembers.principal_id = ?');
+        if (!$principal) {
+            throw new DAV\Exception('Principal not found');
+        }
+        $stmt = $this->pdo->prepare('SELECT principals.uri as uri FROM '.$this->groupMembersTableName.' AS groupmembers LEFT JOIN '.$this->tableName.' AS principals ON groupmembers.member_id = principals.id WHERE groupmembers.principal_id = ?');
         $stmt->execute([$principal['id']]);
 
         $result = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
             $result[] = $row['uri'];
         }
-        return $result;
 
+        return $result;
     }
 
     /**
-     * Returns the list of groups a principal is a member of
+     * Returns the list of groups a principal is a member of.
      *
      * @param string $principal
+     *
      * @return array
      */
-    function getGroupMembership($principal) {
-
+    public function getGroupMembership($principal)
+    {
         $principal = $this->getPrincipalByPath($principal);
-        if (!$principal) throw new DAV\Exception('Principal not found');
-
-        $stmt = $this->pdo->prepare('SELECT principals.uri as uri FROM ' . $this->groupMembersTableName . ' AS groupmembers LEFT JOIN ' . $this->tableName . ' AS principals ON groupmembers.principal_id = principals.id WHERE groupmembers.member_id = ?');
+        if (!$principal) {
+            throw new DAV\Exception('Principal not found');
+        }
+        $stmt = $this->pdo->prepare('SELECT principals.uri as uri FROM '.$this->groupMembersTableName.' AS groupmembers LEFT JOIN '.$this->tableName.' AS principals ON groupmembers.principal_id = principals.id WHERE groupmembers.member_id = ?');
         $stmt->execute([$principal['id']]);
 
         $result = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
             $result[] = $row['uri'];
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -375,13 +388,12 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      * The principals should be passed as a list of uri's.
      *
      * @param string $principal
-     * @param array $members
-     * @return void
+     * @param array  $members
      */
-    function setGroupMemberSet($principal, array $members) {
-
+    public function setGroupMemberSet($principal, array $members)
+    {
         // Grabbing the list of principal id's.
-        $stmt = $this->pdo->prepare('SELECT id, uri FROM ' . $this->tableName . ' WHERE uri IN (? ' . str_repeat(', ? ', count($members)) . ');');
+        $stmt = $this->pdo->prepare('SELECT id, uri FROM '.$this->tableName.' WHERE uri IN (? '.str_repeat(', ? ', count($members)).');');
         $stmt->execute(array_merge([$principal], $members));
 
         $memberIds = [];
@@ -394,19 +406,17 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
                 $memberIds[] = $row['id'];
             }
         }
-        if (!$principalId) throw new DAV\Exception('Principal not found');
-
+        if (!$principalId) {
+            throw new DAV\Exception('Principal not found');
+        }
         // Wiping out old members
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->groupMembersTableName . ' WHERE principal_id = ?;');
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->groupMembersTableName.' WHERE principal_id = ?;');
         $stmt->execute([$principalId]);
 
         foreach ($memberIds as $memberId) {
-
-            $stmt = $this->pdo->prepare('INSERT INTO ' . $this->groupMembersTableName . ' (principal_id, member_id) VALUES (?, ?);');
+            $stmt = $this->pdo->prepare('INSERT INTO '.$this->groupMembersTableName.' (principal_id, member_id) VALUES (?, ?);');
             $stmt->execute([$principalId, $memberId]);
-
         }
-
     }
 
     /**
@@ -417,15 +427,12 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
      * of the principal.
      *
      * @param string $path
-     * @param MkCol $mkCol
-     * @return void
+     * @param MkCol  $mkCol
      */
-    function createPrincipal($path, MkCol $mkCol) {
-
-        $stmt = $this->pdo->prepare('INSERT INTO ' . $this->tableName . ' (uri) VALUES (?)');
+    public function createPrincipal($path, MkCol $mkCol)
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO '.$this->tableName.' (uri) VALUES (?)');
         $stmt->execute([$path]);
         $this->updatePrincipal($path, $mkCol);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php b/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php
index ee5b88a90..4fae96e0c 100644
--- a/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php
+++ b/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV\Exception\InvalidResourceType;
@@ -7,7 +9,7 @@ use Sabre\DAV\IExtendedCollection;
 use Sabre\DAV\MkCol;
 
 /**
- * Principals Collection
+ * Principals Collection.
  *
  * This collection represents a list of users.
  * The users are instances of Sabre\DAVACL\Principal
@@ -16,8 +18,8 @@ use Sabre\DAV\MkCol;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PrincipalCollection extends AbstractPrincipalCollection implements IExtendedCollection, IACL {
-
+class PrincipalCollection extends AbstractPrincipalCollection implements IExtendedCollection, IACL
+{
     use ACLTrait;
 
     /**
@@ -28,12 +30,12 @@ class PrincipalCollection extends AbstractPrincipalCollection implements IExtend
      * supplied by the authentication backend.
      *
      * @param array $principal
+     *
      * @return \Sabre\DAV\INode
      */
-    function getChildForPrincipal(array $principal) {
-
+    public function getChildForPrincipal(array $principal)
+    {
         return new Principal($this->principalBackend, $principal);
-
     }
 
     /**
@@ -56,21 +58,20 @@ class PrincipalCollection extends AbstractPrincipalCollection implements IExtend
      * property for you.
      *
      * @param string $name
-     * @param MkCol $mkCol
+     * @param MkCol  $mkCol
+     *
      * @throws InvalidResourceType
-     * @return void
      */
-    function createExtendedCollection($name, MkCol $mkCol) {
-
+    public function createExtendedCollection($name, MkCol $mkCol)
+    {
         if (!$mkCol->hasResourceType('{DAV:}principal')) {
             throw new InvalidResourceType('Only resources of type {DAV:}principal may be created here');
         }
 
         $this->principalBackend->createPrincipal(
-            $this->principalPrefix . '/' . $name,
+            $this->principalPrefix.'/'.$name,
             $mkCol
         );
-
     }
 
     /**
@@ -85,7 +86,8 @@ class PrincipalCollection extends AbstractPrincipalCollection implements IExtend
      *
      * @return array
      */
-    function getACL() {
+    public function getACL()
+    {
         return [
             [
                 'principal' => '{DAV:}authenticated',
@@ -94,5 +96,4 @@ class PrincipalCollection extends AbstractPrincipalCollection implements IExtend
             ],
         ];
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Property/Acl.php b/vendor/sabre/dav/lib/DAVACL/Xml/Property/Acl.php
index 0e1c30ccf..372f62ab3 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Property/Acl.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Property/Acl.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Property;
 
 use Sabre\DAV;
@@ -25,10 +27,10 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Acl implements Element, HtmlOutput {
-
+class Acl implements Element, HtmlOutput
+{
     /**
-     * List of privileges
+     * List of privileges.
      *
      * @var array
      */
@@ -43,7 +45,7 @@ class Acl implements Element, HtmlOutput {
     protected $prefixBaseUrl;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * This object requires a structure similar to the return value from
      * Sabre\DAVACL\Plugin::getACL().
@@ -57,24 +59,22 @@ class Acl implements Element, HtmlOutput {
      * will automatically be prefixed.
      *
      * @param array $privileges
-     * @param bool $prefixBaseUrl
+     * @param bool  $prefixBaseUrl
      */
-    function __construct(array $privileges, $prefixBaseUrl = true) {
-
+    public function __construct(array $privileges, $prefixBaseUrl = true)
+    {
         $this->privileges = $privileges;
         $this->prefixBaseUrl = $prefixBaseUrl;
-
     }
 
     /**
-     * Returns the list of privileges for this property
+     * Returns the list of privileges for this property.
      *
      * @return array
      */
-    function getPrivileges() {
-
+    public function getPrivileges()
+    {
         return $this->privileges;
-
     }
 
     /**
@@ -94,16 +94,12 @@ class Acl implements Element, HtmlOutput {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->privileges as $ace) {
-
             $this->serializeAce($writer, $ace);
-
         }
-
     }
 
     /**
@@ -118,32 +114,33 @@ class Acl implements Element, HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
+    public function toHtml(HtmlOutputHelper $html)
+    {
         ob_start();
-        echo "<table>";
-        echo "<tr><th>Principal</th><th>Privilege</th><th></th></tr>";
+        echo '<table>';
+        echo '<tr><th>Principal</th><th>Privilege</th><th></th></tr>';
         foreach ($this->privileges as $privilege) {
-
             echo '<tr>';
             // if it starts with a {, it's a special principal
-            if ($privilege['principal'][0] === '{') {
+            if ('{' === $privilege['principal'][0]) {
                 echo '<td>', $html->xmlName($privilege['principal']), '</td>';
             } else {
                 echo '<td>', $html->link($privilege['principal']), '</td>';
             }
             echo '<td>', $html->xmlName($privilege['privilege']), '</td>';
             echo '<td>';
-            if (!empty($privilege['protected'])) echo '(protected)';
+            if (!empty($privilege['protected'])) {
+                echo '(protected)';
+            }
             echo '</td>';
             echo '</tr>';
-
         }
-        echo "</table>";
-        return ob_get_clean();
+        echo '</table>';
 
+        return ob_get_clean();
     }
 
     /**
@@ -165,21 +162,21 @@ class Acl implements Element, HtmlOutput {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elementMap = [
-            '{DAV:}ace'       => 'Sabre\Xml\Element\KeyValue',
+            '{DAV:}ace' => 'Sabre\Xml\Element\KeyValue',
             '{DAV:}privilege' => 'Sabre\Xml\Element\Elements',
             '{DAV:}principal' => 'Sabre\DAVACL\Xml\Property\Principal',
         ];
 
         $privileges = [];
 
-        foreach ((array)$reader->parseInnerTree($elementMap) as $element) {
-
-            if ($element['name'] !== '{DAV:}ace') {
+        foreach ((array) $reader->parseInnerTree($elementMap) as $element) {
+            if ('{DAV:}ace' !== $element['name']) {
                 continue;
             }
             $ace = $element['value'];
@@ -190,19 +187,18 @@ class Acl implements Element, HtmlOutput {
             $principal = $ace['{DAV:}principal'];
 
             switch ($principal->getType()) {
-                case Principal::HREF :
+                case Principal::HREF:
                     $principal = $principal->getHref();
                     break;
-                case Principal::AUTHENTICATED :
+                case Principal::AUTHENTICATED:
                     $principal = '{DAV:}authenticated';
                     break;
-                case Principal::UNAUTHENTICATED :
+                case Principal::UNAUTHENTICATED:
                     $principal = '{DAV:}unauthenticated';
                     break;
-                case Principal::ALL :
+                case Principal::ALL:
                     $principal = '{DAV:}all';
                     break;
-
             }
 
             $protected = array_key_exists('{DAV:}protected', $ace);
@@ -211,7 +207,7 @@ class Acl implements Element, HtmlOutput {
                 throw new DAV\Exception\NotImplemented('Every {DAV:}ace element must have a {DAV:}grant element. {DAV:}deny is not yet supported');
             }
             foreach ($ace['{DAV:}grant'] as $elem) {
-                if ($elem['name'] !== '{DAV:}privilege') {
+                if ('{DAV:}privilege' !== $elem['name']) {
                     continue;
                 }
 
@@ -222,34 +218,30 @@ class Acl implements Element, HtmlOutput {
                         'privilege' => $priv,
                     ];
                 }
-
             }
-
         }
 
         return new self($privileges);
-
     }
 
     /**
      * Serializes a single access control entry.
      *
      * @param Writer $writer
-     * @param array $ace
-     * @return void
+     * @param array  $ace
      */
-    private function serializeAce(Writer $writer, array $ace) {
-
+    private function serializeAce(Writer $writer, array $ace)
+    {
         $writer->startElement('{DAV:}ace');
 
         switch ($ace['principal']) {
-            case '{DAV:}authenticated' :
+            case '{DAV:}authenticated':
                 $principal = new Principal(Principal::AUTHENTICATED);
                 break;
-            case '{DAV:}unauthenticated' :
+            case '{DAV:}unauthenticated':
                 $principal = new Principal(Principal::UNAUTHENTICATED);
                 break;
-            case '{DAV:}all' :
+            case '{DAV:}all':
                 $principal = new Principal(Principal::ALL);
                 break;
             default:
@@ -271,7 +263,5 @@ class Acl implements Element, HtmlOutput {
         }
 
         $writer->endElement(); // ace
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Property/AclRestrictions.php b/vendor/sabre/dav/lib/DAVACL/Xml/Property/AclRestrictions.php
index 8d5854c23..0bf16b431 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Property/AclRestrictions.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Property/AclRestrictions.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Property;
 
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * AclRestrictions property
+ * AclRestrictions property.
  *
  * This property represents {DAV:}acl-restrictions, as defined in RFC3744.
  *
@@ -14,8 +16,8 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AclRestrictions implements XmlSerializable {
-
+class AclRestrictions implements XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -33,13 +35,10 @@ class AclRestrictions implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         $writer->writeElement('{DAV:}grant-only');
         $writer->writeElement('{DAV:}no-invert');
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Property/CurrentUserPrivilegeSet.php b/vendor/sabre/dav/lib/DAVACL/Xml/Property/CurrentUserPrivilegeSet.php
index 74c09cee1..083856330 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Property/CurrentUserPrivilegeSet.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Property/CurrentUserPrivilegeSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Property;
 
 use Sabre\DAV\Browser\HtmlOutput;
@@ -9,7 +11,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\Writer;
 
 /**
- * CurrentUserPrivilegeSet
+ * CurrentUserPrivilegeSet.
  *
  * This class represents the current-user-privilege-set property. When
  * requested, it contain all the privileges a user has on a specific node.
@@ -18,26 +20,25 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CurrentUserPrivilegeSet implements Element, HtmlOutput {
-
+class CurrentUserPrivilegeSet implements Element, HtmlOutput
+{
     /**
-     * List of privileges
+     * List of privileges.
      *
      * @var array
      */
     private $privileges;
 
     /**
-     * Creates the object
+     * Creates the object.
      *
      * Pass the privileges in clark-notation
      *
      * @param array $privileges
      */
-    function __construct(array $privileges) {
-
+    public function __construct(array $privileges)
+    {
         $this->privileges = $privileges;
-
     }
 
     /**
@@ -57,19 +58,14 @@ class CurrentUserPrivilegeSet implements Element, HtmlOutput {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->privileges as $privName) {
-
             $writer->startElement('{DAV:}privilege');
             $writer->writeElement($privName);
             $writer->endElement();
-
         }
-
-
     }
 
     /**
@@ -77,12 +73,12 @@ class CurrentUserPrivilegeSet implements Element, HtmlOutput {
      * list.
      *
      * @param string $privilegeName
+     *
      * @return bool
      */
-    function has($privilegeName) {
-
+    public function has($privilegeName)
+    {
         return in_array($privilegeName, $this->privileges);
-
     }
 
     /**
@@ -90,10 +86,9 @@ class CurrentUserPrivilegeSet implements Element, HtmlOutput {
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->privileges;
-
     }
 
     /**
@@ -115,21 +110,22 @@ class CurrentUserPrivilegeSet implements Element, HtmlOutput {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [];
 
         $tree = $reader->parseInnerTree(['{DAV:}privilege' => 'Sabre\\Xml\\Element\\Elements']);
         foreach ($tree as $element) {
-            if ($element['name'] !== '{DAV:}privilege') {
+            if ('{DAV:}privilege' !== $element['name']) {
                 continue;
             }
             $result[] = $element['value'][0];
         }
-        return new self($result);
 
+        return new self($result);
     }
 
     /**
@@ -144,16 +140,14 @@ class CurrentUserPrivilegeSet implements Element, HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
+    public function toHtml(HtmlOutputHelper $html)
+    {
         return implode(
             ', ',
             array_map([$html, 'xmlName'], $this->getValue())
         );
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Property/Principal.php b/vendor/sabre/dav/lib/DAVACL/Xml/Property/Principal.php
index 04d22165d..e304a2aed 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Property/Principal.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Property/Principal.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Property;
 
 use Sabre\DAV;
@@ -9,7 +11,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\Writer;
 
 /**
- * Principal property
+ * Principal property.
  *
  * The principal property represents a principal from RFC3744 (ACL).
  * The property can be used to specify a principal or pseudo principals.
@@ -18,30 +20,30 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Principal extends DAV\Xml\Property\Href {
-
+class Principal extends DAV\Xml\Property\Href
+{
     /**
-     * To specify a not-logged-in user, use the UNAUTHENTICATED principal
+     * To specify a not-logged-in user, use the UNAUTHENTICATED principal.
      */
     const UNAUTHENTICATED = 1;
 
     /**
-     * To specify any principal that is logged in, use AUTHENTICATED
+     * To specify any principal that is logged in, use AUTHENTICATED.
      */
     const AUTHENTICATED = 2;
 
     /**
-     * Specific principals can be specified with the HREF
+     * Specific principals can be specified with the HREF.
      */
     const HREF = 3;
 
     /**
-     * Everybody, basically
+     * Everybody, basically.
      */
     const ALL = 4;
 
     /**
-     * Principal-type
+     * Principal-type.
      *
      * Must be one of the UNAUTHENTICATED, AUTHENTICATED or HREF constants.
      *
@@ -56,34 +58,31 @@ class Principal extends DAV\Xml\Property\Href {
      *
      * 'href' is only required for the HREF type.
      *
-     * @param int $type
+     * @param int         $type
      * @param string|null $href
      */
-    function __construct($type, $href = null) {
-
+    public function __construct($type, $href = null)
+    {
         $this->type = $type;
-        if ($type === self::HREF && is_null($href)) {
+        if (self::HREF === $type && is_null($href)) {
             throw new DAV\Exception('The href argument must be specified for the HREF principal type.');
         }
         if ($href) {
-            $href = rtrim($href, '/') . '/';
+            $href = rtrim($href, '/').'/';
             parent::__construct($href);
         }
-
     }
 
     /**
-     * Returns the principal type
+     * Returns the principal type.
      *
      * @return int
      */
-    function getType() {
-
+    public function getType()
+    {
         return $this->type;
-
     }
 
-
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -101,26 +100,23 @@ class Principal extends DAV\Xml\Property\Href {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         switch ($this->type) {
-
-            case self::UNAUTHENTICATED :
+            case self::UNAUTHENTICATED:
                 $writer->writeElement('{DAV:}unauthenticated');
                 break;
-            case self::AUTHENTICATED :
+            case self::AUTHENTICATED:
                 $writer->writeElement('{DAV:}authenticated');
                 break;
-            case self::HREF :
+            case self::HREF:
                 parent::xmlSerialize($writer);
                 break;
-            case self::ALL :
+            case self::ALL:
                 $writer->writeElement('{DAV:}all');
                 break;
         }
-
     }
 
     /**
@@ -135,22 +131,21 @@ class Principal extends DAV\Xml\Property\Href {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
+    public function toHtml(HtmlOutputHelper $html)
+    {
         switch ($this->type) {
-
-            case self::UNAUTHENTICATED :
+            case self::UNAUTHENTICATED:
                 return '<em>unauthenticated</em>';
-            case self::AUTHENTICATED :
+            case self::AUTHENTICATED:
                 return '<em>authenticated</em>';
-            case self::HREF :
+            case self::HREF:
                 return parent::toHtml($html);
-            case self::ALL :
+            case self::ALL:
                 return '<em>all</em>';
         }
-
     }
 
     /**
@@ -172,25 +167,24 @@ class Principal extends DAV\Xml\Property\Href {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $tree = $reader->parseInnerTree()[0];
 
         switch ($tree['name']) {
-            case '{DAV:}unauthenticated' :
+            case '{DAV:}unauthenticated':
                 return new self(self::UNAUTHENTICATED);
-            case '{DAV:}authenticated' :
+            case '{DAV:}authenticated':
                 return new self(self::AUTHENTICATED);
             case '{DAV:}href':
                 return new self(self::HREF, $tree['value']);
             case '{DAV:}all':
                 return new self(self::ALL);
-            default :
-                throw new BadRequest('Unknown or unsupported principal type: ' . $tree['name']);
+            default:
+                throw new BadRequest('Unknown or unsupported principal type: '.$tree['name']);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php b/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php
index b963cc8c3..1762391d9 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Property;
 
 use Sabre\DAV\Browser\HtmlOutput;
@@ -8,7 +10,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * SupportedPrivilegeSet property
+ * SupportedPrivilegeSet property.
  *
  * This property encodes the {DAV:}supported-privilege-set property, as defined
  * in rfc3744. Please consult the rfc for details about it's structure.
@@ -21,24 +23,23 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
-
+class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput
+{
     /**
-     * privileges
+     * privileges.
      *
      * @var array
      */
     protected $privileges;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param array $privileges
      */
-    function __construct(array $privileges) {
-
+    public function __construct(array $privileges)
+    {
         $this->privileges = $privileges;
-
     }
 
     /**
@@ -46,10 +47,9 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->privileges;
-
     }
 
     /**
@@ -69,12 +69,10 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         $this->serializePriv($writer, '{DAV:}all', ['aggregates' => $this->privileges]);
-
     }
 
     /**
@@ -89,52 +87,49 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
      * be used to construct local links.
      *
      * @param HtmlOutputHelper $html
+     *
      * @return string
      */
-    function toHtml(HtmlOutputHelper $html) {
-
-        $traverse = function($privName, $priv) use (&$traverse, $html) {
-            echo "<li>";
+    public function toHtml(HtmlOutputHelper $html)
+    {
+        $traverse = function ($privName, $priv) use (&$traverse, $html) {
+            echo '<li>';
             echo $html->xmlName($privName);
             if (isset($priv['abstract']) && $priv['abstract']) {
-                echo " <i>(abstract)</i>";
+                echo ' <i>(abstract)</i>';
             }
             if (isset($priv['description'])) {
-                echo " " . $html->h($priv['description']);
+                echo ' '.$html->h($priv['description']);
             }
             if (isset($priv['aggregates'])) {
                 echo "\n<ul>\n";
                 foreach ($priv['aggregates'] as $subPrivName => $subPriv) {
                     $traverse($subPrivName, $subPriv);
                 }
-                echo "</ul>";
+                echo '</ul>';
             }
             echo "</li>\n";
         };
 
         ob_start();
-        echo "<ul class=\"tree\">";
+        echo '<ul class="tree">';
         $traverse('{DAV:}all', ['aggregates' => $this->getValue()]);
         echo "</ul>\n";
 
         return ob_get_clean();
-
     }
 
-
-
     /**
-     * Serializes a property
+     * Serializes a property.
      *
      * This is a recursive function.
      *
      * @param Writer $writer
      * @param string $privName
-     * @param array $privilege
-     * @return void
+     * @param array  $privilege
      */
-    private function serializePriv(Writer $writer, $privName, $privilege) {
-
+    private function serializePriv(Writer $writer, $privName, $privilege)
+    {
         $writer->startElement('{DAV:}supported-privilege');
 
         $writer->startElement('{DAV:}privilege');
@@ -154,7 +149,5 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
         }
 
         $writer->endElement(); // supported-privilege
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Request/AclPrincipalPropSetReport.php b/vendor/sabre/dav/lib/DAVACL/Xml/Request/AclPrincipalPropSetReport.php
index 0aa2f29a5..17b37afab 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Request/AclPrincipalPropSetReport.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Request/AclPrincipalPropSetReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Request;
 
 use Sabre\Xml\Deserializer;
@@ -17,8 +19,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (https://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AclPrincipalPropSetReport implements XmlDeserializable {
-
+class AclPrincipalPropSetReport implements XmlDeserializable
+{
     public $properties = [];
 
     /**
@@ -40,10 +42,11 @@ class AclPrincipalPropSetReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-       
+    public static function xmlDeserialize(Reader $reader)
+    {
         $reader->pushContext();
         $reader->elementMap['{DAV:}prop'] = 'Sabre\Xml\Deserializer\enum';
 
@@ -61,7 +64,5 @@ class AclPrincipalPropSetReport implements XmlDeserializable {
         }
 
         return $report;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Request/ExpandPropertyReport.php b/vendor/sabre/dav/lib/DAVACL/Xml/Request/ExpandPropertyReport.php
index a9938ba5b..393308cd2 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Request/ExpandPropertyReport.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Request/ExpandPropertyReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Request;
 
 use Sabre\Xml\Reader;
@@ -16,8 +18,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ExpandPropertyReport implements XmlDeserializable {
-
+class ExpandPropertyReport implements XmlDeserializable
+{
     /**
      * An array with requested properties.
      *
@@ -51,17 +53,17 @@ class ExpandPropertyReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree();
 
         $obj = new self();
         $obj->properties = self::traverse($elems);
 
         return $obj;
-
     }
 
     /**
@@ -69,15 +71,15 @@ class ExpandPropertyReport implements XmlDeserializable {
      * {DAV:}property elements.
      *
      * @param array $elems
-     * @return void
+     *
+     * @return array
      */
-    private static function traverse($elems) {
-
+    private static function traverse($elems)
+    {
         $result = [];
 
         foreach ($elems as $elem) {
-
-            if ($elem['name'] !== '{DAV:}property') {
+            if ('{DAV:}property' !== $elem['name']) {
                 continue;
             }
 
@@ -85,7 +87,7 @@ class ExpandPropertyReport implements XmlDeserializable {
                 $elem['attributes']['namespace'] :
                 'DAV:';
 
-            $propName = '{' . $namespace . '}' . $elem['attributes']['name'];
+            $propName = '{'.$namespace.'}'.$elem['attributes']['name'];
 
             $value = null;
             if (is_array($elem['value'])) {
@@ -93,11 +95,8 @@ class ExpandPropertyReport implements XmlDeserializable {
             }
 
             $result[$propName] = $value;
-
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalMatchReport.php b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalMatchReport.php
index 1be15ab2d..f868cc9df 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalMatchReport.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalMatchReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Request;
 
 use Sabre\Xml\Deserializer;
@@ -18,8 +20,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PrincipalMatchReport implements XmlDeserializable {
-
+class PrincipalMatchReport implements XmlDeserializable
+{
     /**
      * Report on a list of principals that match the current principal.
      */
@@ -31,7 +33,7 @@ class PrincipalMatchReport implements XmlDeserializable {
     const PRINCIPAL_PROPERTY = 2;
 
     /**
-     * Must be SELF or PRINCIPAL_PROPERTY
+     * Must be SELF or PRINCIPAL_PROPERTY.
      *
      * @var int
      */
@@ -71,10 +73,11 @@ class PrincipalMatchReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $reader->pushContext();
         $reader->elementMap['{DAV:}prop'] = 'Sabre\Xml\Deserializer\enum';
 
@@ -101,7 +104,5 @@ class PrincipalMatchReport implements XmlDeserializable {
         }
 
         return $principalMatch;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalPropertySearchReport.php b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalPropertySearchReport.php
index b0cf0e408..26468fd21 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalPropertySearchReport.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalPropertySearchReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Request;
 
 use Sabre\DAV\Exception\BadRequest;
@@ -18,8 +20,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PrincipalPropertySearchReport implements XmlDeserializable {
-
+class PrincipalPropertySearchReport implements XmlDeserializable
+{
     /**
      * The requested properties.
      *
@@ -28,7 +30,7 @@ class PrincipalPropertySearchReport implements XmlDeserializable {
     public $properties;
 
     /**
-     * searchProperties
+     * searchProperties.
      *
      * @var array
      */
@@ -72,31 +74,30 @@ class PrincipalPropertySearchReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $self = new self();
 
         $foundSearchProp = false;
         $self->test = 'allof';
-        if ($reader->getAttribute('test') === 'anyof') {
+        if ('anyof' === $reader->getAttribute('test')) {
             $self->test = 'anyof';
         }
 
         $elemMap = [
             '{DAV:}property-search' => 'Sabre\\Xml\\Element\\KeyValue',
-            '{DAV:}prop'            => 'Sabre\\Xml\\Element\\KeyValue',
+            '{DAV:}prop' => 'Sabre\\Xml\\Element\\KeyValue',
         ];
-        
-        foreach ($reader->parseInnerTree($elemMap) as $elem) {
 
+        foreach ($reader->parseInnerTree($elemMap) as $elem) {
             switch ($elem['name']) {
-
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $self->properties = array_keys($elem['value']);
                     break;
-                case '{DAV:}property-search' :
+                case '{DAV:}property-search':
                     $foundSearchProp = true;
                     // This property has two sub-elements:
                     //   {DAV:}prop - The property to be searched on. This may
@@ -109,19 +110,15 @@ class PrincipalPropertySearchReport implements XmlDeserializable {
                         $self->searchProperties[$propName] = $elem['value']['{DAV:}match'];
                     }
                     break;
-                case '{DAV:}apply-to-principal-collection-set' :
+                case '{DAV:}apply-to-principal-collection-set':
                     $self->applyToPrincipalCollectionSet = true;
                     break;
-
             }
-
         }
         if (!$foundSearchProp) {
             throw new BadRequest('The {DAV:}principal-property-search report must contain at least 1 {DAV:}property-search element');
         }
 
         return $self;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalSearchPropertySetReport.php b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalSearchPropertySetReport.php
index 64d1f7f86..37bc2cfbf 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalSearchPropertySetReport.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalSearchPropertySetReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Xml\Request;
 
 use Sabre\DAV\Exception\BadRequest;
@@ -18,8 +20,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PrincipalSearchPropertySetReport implements XmlDeserializable {
-
+class PrincipalSearchPropertySetReport implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -39,10 +41,11 @@ class PrincipalSearchPropertySetReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         if (!$reader->isEmptyElement) {
             throw new BadRequest('The {DAV:}principal-search-property-set element must be empty');
         }
@@ -51,8 +54,7 @@ class PrincipalSearchPropertySetReport implements XmlDeserializable {
         $reader->next();
 
         $self = new self();
-        return $self;
 
+        return $self;
     }
-
 }
diff --git a/vendor/sabre/dav/phpstan.neon b/vendor/sabre/dav/phpstan.neon
new file mode 100644
index 000000000..e50c5be6e
--- /dev/null
+++ b/vendor/sabre/dav/phpstan.neon
@@ -0,0 +1,3 @@
+parameters:
+  level: 0
+  bootstrap: %currentWorkingDirectory%/vendor/autoload.php
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php
index 406dbe0e8..80de750dc 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use Sabre\CalDAV;
@@ -7,14 +9,14 @@ use Sabre\DAV;
 use Sabre\DAV\PropPatch;
 use Sabre\DAV\Xml\Element\Sharee;
 
-abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
-
+abstract class AbstractPDOTest extends \PHPUnit\Framework\TestCase
+{
     use DAV\DbTestHelperTrait;
 
     protected $pdo;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->dropTables([
             'calendarobjects',
             'calendars',
@@ -26,72 +28,66 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $this->createSchema('calendars');
 
         $this->pdo = $this->getDb();
-
     }
 
-    function testConstruct() {
-
+    public function testConstruct()
+    {
         $backend = new PDO($this->pdo);
         $this->assertTrue($backend instanceof PDO);
-
     }
 
     /**
      * @depends testConstruct
      */
-    function testGetCalendarsForUserNoCalendars() {
-
+    public function testGetCalendarsForUserNoCalendars()
+    {
         $backend = new PDO($this->pdo);
         $calendars = $backend->getCalendarsForUser('principals/user2');
         $this->assertEquals([], $calendars);
-
     }
 
     /**
      * @depends testConstruct
      */
-    function testCreateCalendarAndFetch() {
-
+    public function testCreateCalendarAndFetch()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', [
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VEVENT']),
-            '{DAV:}displayname'                                               => 'Hello!',
-            '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp'         => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
+            '{DAV:}displayname' => 'Hello!',
+            '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
         ]);
         $calendars = $backend->getCalendarsForUser('principals/user2');
 
         $elementCheck = [
-            'uri'                                                     => 'somerandomid',
-            '{DAV:}displayname'                                       => 'Hello!',
-            '{urn:ietf:params:xml:ns:caldav}calendar-description'     => '',
+            'uri' => 'somerandomid',
+            '{DAV:}displayname' => 'Hello!',
+            '{urn:ietf:params:xml:ns:caldav}calendar-description' => '',
             '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
-            'share-access'                                            => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+            'share-access' => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
         ];
 
         $this->assertInternalType('array', $calendars);
         $this->assertEquals(1, count($calendars));
 
         foreach ($elementCheck as $name => $value) {
-
             $this->assertArrayHasKey($name, $calendars[0]);
             $this->assertEquals($value, $calendars[0][$name]);
-
         }
-
     }
 
     /**
      * @depends testConstruct
      */
-    function testUpdateCalendarAndFetch() {
-
+    public function testUpdateCalendarAndFetch()
+    {
         $backend = new PDO($this->pdo);
 
         //Creating a new calendar
         $newId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
         $propPatch = new PropPatch([
-            '{DAV:}displayname'                                       => 'myCalendar',
+            '{DAV:}displayname' => 'myCalendar',
             '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
         ]);
 
@@ -107,12 +103,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         // Checking if all the information is still correct
         $elementCheck = [
-            'id'                                                      => $newId,
-            'uri'                                                     => 'somerandomid',
-            '{DAV:}displayname'                                       => 'myCalendar',
-            '{urn:ietf:params:xml:ns:caldav}calendar-description'     => '',
-            '{urn:ietf:params:xml:ns:caldav}calendar-timezone'        => '',
-            '{http://calendarserver.org/ns/}getctag'                  => 'http://sabre.io/ns/sync/2',
+            'id' => $newId,
+            'uri' => 'somerandomid',
+            '{DAV:}displayname' => 'myCalendar',
+            '{urn:ietf:params:xml:ns:caldav}calendar-description' => '',
+            '{urn:ietf:params:xml:ns:caldav}calendar-timezone' => '',
+            '{http://calendarserver.org/ns/}getctag' => 'http://sabre.io/ns/sync/2',
             '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
         ];
 
@@ -120,40 +116,36 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(1, count($calendars));
 
         foreach ($elementCheck as $name => $value) {
-
             $this->assertArrayHasKey($name, $calendars[0]);
             $this->assertEquals($value, $calendars[0][$name]);
-
         }
-
     }
 
     /**
      * @depends testConstruct
      * @expectedException \InvalidArgumentException
      */
-    function testUpdateCalendarBadId() {
-
+    public function testUpdateCalendarBadId()
+    {
         $backend = new PDO($this->pdo);
 
         //Creating a new calendar
         $newId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
         $propPatch = new PropPatch([
-            '{DAV:}displayname'                                       => 'myCalendar',
+            '{DAV:}displayname' => 'myCalendar',
             '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
         ]);
 
         // Updating the calendar
         $backend->updateCalendar('raaaa', $propPatch);
-
     }
 
     /**
      * @depends testUpdateCalendarAndFetch
      */
-    function testUpdateCalendarUnknownProperty() {
-
+    public function testUpdateCalendarUnknownProperty()
+    {
         $backend = new PDO($this->pdo);
 
         //Creating a new calendar
@@ -161,7 +153,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $propPatch = new PropPatch([
             '{DAV:}displayname' => 'myCalendar',
-            '{DAV:}yourmom'     => 'wittycomment',
+            '{DAV:}yourmom' => 'wittycomment',
         ]);
 
         // Updating the calendar
@@ -170,63 +162,59 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         // Verifying the result of the update
         $this->assertEquals([
-            '{DAV:}yourmom'     => 403,
+            '{DAV:}yourmom' => 403,
             '{DAV:}displayname' => 424,
         ], $propPatch->getResult());
-
     }
 
     /**
      * @depends testCreateCalendarAndFetch
      */
-    function testDeleteCalendar() {
-
+    public function testDeleteCalendar()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', [
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VEVENT']),
-            '{DAV:}displayname'                                               => 'Hello!',
+            '{DAV:}displayname' => 'Hello!',
         ]);
 
         $backend->deleteCalendar($returnedId);
 
         $calendars = $backend->getCalendarsForUser('principals/user2');
         $this->assertEquals([], $calendars);
-
     }
 
     /**
      * @depends testCreateCalendarAndFetch
      * @expectedException \InvalidArgumentException
      */
-    function testDeleteCalendarBadID() {
-
+    public function testDeleteCalendarBadID()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', [
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VEVENT']),
-            '{DAV:}displayname'                                               => 'Hello!',
+            '{DAV:}displayname' => 'Hello!',
         ]);
 
         $backend->deleteCalendar('bad-id');
-
     }
 
     /**
      * @depends testCreateCalendarAndFetch
      * @expectedException \Sabre\DAV\Exception
      */
-    function testCreateCalendarIncorrectComponentSet() {;
-
+    public function testCreateCalendarIncorrectComponentSet()
+    {
         $backend = new PDO($this->pdo);
 
         //Creating a new calendar
         $newId = $backend->createCalendar('principals/user2', 'somerandomid', [
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => 'blabla',
         ]);
-
     }
 
-    function testCreateCalendarObject() {
-
+    public function testCreateCalendarObject()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -242,17 +230,17 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals([
-            'etag'           => md5($object),
-            'size'           => strlen($object),
-            'calendardata'   => $object,
+            'etag' => md5($object),
+            'size' => strlen($object),
+            'calendardata' => $object,
             'firstoccurence' => strtotime('20120101'),
-            'lastoccurence'  => strtotime('20120101') + (3600 * 24),
-            'componenttype'  => 'VEVENT',
+            'lastoccurence' => strtotime('20120101') + (3600 * 24),
+            'componenttype' => 'VEVENT',
         ], $row);
-
     }
-    function testGetMultipleObjects() {
 
+    public function testGetMultipleObjects()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -263,18 +251,18 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $check = [
             [
-                'id'           => 1,
-                'etag'         => '"' . md5($object) . '"',
-                'uri'          => 'id-1',
-                'size'         => strlen($object),
+                'id' => 1,
+                'etag' => '"'.md5($object).'"',
+                'uri' => 'id-1',
+                'size' => strlen($object),
                 'calendardata' => $object,
                 'lastmodified' => null,
             ],
             [
-                'id'           => 2,
-                'etag'         => '"' . md5($object) . '"',
-                'uri'          => 'id-2',
-                'size'         => strlen($object),
+                'id' => 2,
+                'etag' => '"'.md5($object).'"',
+                'uri' => 'id-2',
+                'size' => strlen($object),
                 'calendardata' => $object,
                 'lastmodified' => null,
             ],
@@ -283,62 +271,54 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $result = $backend->getMultipleCalendarObjects($returnedId, ['id-1', 'id-2']);
 
         foreach ($check as $index => $props) {
-
             foreach ($props as $key => $expected) {
-
                 $actual = $result[$index][$key];
 
                 switch ($key) {
-                    case 'lastmodified' :
+                    case 'lastmodified':
                         $this->assertInternalType('int', $actual);
                         break;
-                    case 'calendardata' :
+                    case 'calendardata':
                         if (is_resource($actual)) {
                             $actual = stream_get_contents($actual);
                         }
                         // no break intentional
-                    default :
+                    default:
                         $this->assertEquals($expected, $actual);
-
                 }
-
             }
-
         }
-
     }
 
     /**
      * @depends testGetMultipleObjects
      * @expectedException \InvalidArgumentException
      */
-    function testGetMultipleObjectsBadId() {
-
+    public function testGetMultipleObjectsBadId()
+    {
         $backend = new PDO($this->pdo);
         $backend->getMultipleCalendarObjects('bad-id', ['foo-bar']);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\BadRequest
+     * @expectedException \Sabre\DAV\Exception\BadRequest
      * @depends testCreateCalendarObject
      */
-    function testCreateCalendarObjectNoComponent() {
-
+    public function testCreateCalendarObjectNoComponent()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
         $object = "BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nEND:VCALENDAR\r\n";
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testCreateCalendarObjectDuration() {
-
+    public function testCreateCalendarObjectDuration()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -354,37 +334,34 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals([
-            'etag'           => md5($object),
-            'size'           => strlen($object),
-            'calendardata'   => $object,
+            'etag' => md5($object),
+            'size' => strlen($object),
+            'calendardata' => $object,
             'firstoccurence' => strtotime('20120101'),
-            'lastoccurence'  => strtotime('20120101') + (3600 * 48),
-            'componenttype'  => 'VEVENT',
+            'lastoccurence' => strtotime('20120101') + (3600 * 48),
+            'componenttype' => 'VEVENT',
         ], $row);
-
     }
 
     /**
      * @depends testCreateCalendarObject
      * @expectedException \InvalidArgumentException
      */
-    function testCreateCalendarObjectBadId() {
-
+    public function testCreateCalendarObjectBadId()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
         $object = "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nDURATION:P2D\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n";
 
         $backend->createCalendarObject('bad-id', 'random-id', $object);
-
     }
 
-
     /**
      * @depends testCreateCalendarObject
      */
-    function testCreateCalendarObjectNoDTEND() {
-
+    public function testCreateCalendarObjectNoDTEND()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -399,21 +376,20 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals([
-            'etag'           => md5($object),
-            'size'           => strlen($object),
-            'calendardata'   => $object,
+            'etag' => md5($object),
+            'size' => strlen($object),
+            'calendardata' => $object,
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
-            'lastoccurence'  => strtotime('2012-01-01 10:00:00'),
-            'componenttype'  => 'VEVENT',
+            'lastoccurence' => strtotime('2012-01-01 10:00:00'),
+            'componenttype' => 'VEVENT',
         ], $row);
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testCreateCalendarObjectWithDTEND() {
-
+    public function testCreateCalendarObjectWithDTEND()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -428,21 +404,20 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals([
-            'etag'           => md5($object),
-            'size'           => strlen($object),
-            'calendardata'   => $object,
+            'etag' => md5($object),
+            'size' => strlen($object),
+            'calendardata' => $object,
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
-            'lastoccurence'  => strtotime('2012-01-01 11:00:00'),
-            'componenttype'  => 'VEVENT',
+            'lastoccurence' => strtotime('2012-01-01 11:00:00'),
+            'componenttype' => 'VEVENT',
         ], $row);
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testCreateCalendarObjectInfiniteRecurrence() {
-
+    public function testCreateCalendarObjectInfiniteRecurrence()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -457,21 +432,20 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals([
-            'etag'           => md5($object),
-            'size'           => strlen($object),
-            'calendardata'   => $object,
+            'etag' => md5($object),
+            'size' => strlen($object),
+            'calendardata' => $object,
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
-            'lastoccurence'  => strtotime(PDO::MAX_DATE),
-            'componenttype'  => 'VEVENT',
+            'lastoccurence' => strtotime(PDO::MAX_DATE),
+            'componenttype' => 'VEVENT',
         ], $row);
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testCreateCalendarObjectEndingRecurrence() {
-
+    public function testCreateCalendarObjectEndingRecurrence()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -486,21 +460,20 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals([
-            'etag'           => md5($object),
-            'size'           => strlen($object),
-            'calendardata'   => $object,
+            'etag' => md5($object),
+            'size' => strlen($object),
+            'calendardata' => $object,
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
-            'lastoccurence'  => strtotime('2012-01-01 11:00:00') + (3600 * 24 * 999),
-            'componenttype'  => 'VEVENT',
+            'lastoccurence' => strtotime('2012-01-01 11:00:00') + (3600 * 24 * 999),
+            'componenttype' => 'VEVENT',
         ], $row);
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testCreateCalendarObjectTask() {
-
+    public function testCreateCalendarObjectTask()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -515,21 +488,20 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals([
-            'etag'           => md5($object),
-            'size'           => strlen($object),
-            'calendardata'   => $object,
+            'etag' => md5($object),
+            'size' => strlen($object),
+            'calendardata' => $object,
             'firstoccurence' => null,
-            'lastoccurence'  => null,
-            'componenttype'  => 'VTODO',
+            'lastoccurence' => null,
+            'componenttype' => 'VTODO',
         ], $row);
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testGetCalendarObjects() {
-
+    public function testGetCalendarObjects()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -543,36 +515,33 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals('random-id', $data['uri']);
         $this->assertEquals(strlen($object), $data['size']);
-
     }
 
     /**
      * @depends testGetCalendarObjects
      * @expectedException \InvalidArgumentException
      */
-    function testGetCalendarObjectsBadId() {
-
+    public function testGetCalendarObjectsBadId()
+    {
         $backend = new PDO($this->pdo);
         $backend->getCalendarObjects('bad-id');
-
     }
 
     /**
      * @depends testGetCalendarObjects
      * @expectedException \InvalidArgumentException
      */
-    function testGetCalendarObjectBadId() {
-
+    public function testGetCalendarObjectBadId()
+    {
         $backend = new PDO($this->pdo);
         $backend->getCalendarObject('bad-id', 'foo-bar');
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testGetCalendarObjectByUID() {
-
+    public function testGetCalendarObjectByUID()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -586,14 +555,13 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'somerandomid/random-id',
             $backend->getCalendarObjectByUID('principals/user2', 'foo')
         );
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testUpdateCalendarObject() {
-
+    public function testUpdateCalendarObject()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -610,26 +578,23 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals($object2, $data['calendardata']);
         $this->assertEquals('random-id', $data['uri']);
-
-
     }
 
     /**
      * @depends testUpdateCalendarObject
      * @expectedException \InvalidArgumentException
      */
-    function testUpdateCalendarObjectBadId() {
-
+    public function testUpdateCalendarObjectBadId()
+    {
         $backend = new PDO($this->pdo);
         $backend->updateCalendarObject('bad-id', 'object-id', 'objectdata');
-
     }
 
     /**
      * @depends testCreateCalendarObject
      */
-    function testDeleteCalendarObject() {
-
+    public function testDeleteCalendarObject()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
@@ -639,222 +604,215 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $data = $backend->getCalendarObject($returnedId, 'random-id');
         $this->assertNull($data);
-
     }
 
     /**
      * @depends testDeleteCalendarObject
      * @expectedException \InvalidArgumentException
      */
-    function testDeleteCalendarObjectBadId() {
-
+    public function testDeleteCalendarObjectBadId()
+    {
         $backend = new PDO($this->pdo);
         $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
 
         $object = "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n";
         $backend->createCalendarObject($returnedId, 'random-id', $object);
         $backend->deleteCalendarObject('bad-id', 'random-id');
-
     }
 
-    function testCalendarQueryNoResult() {
-
+    public function testCalendarQueryNoResult()
+    {
         $abstract = new PDO($this->pdo);
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VJOURNAL',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VJOURNAL',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => null,
+                    'time-range' => null,
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $this->assertEquals([
         ], $abstract->calendarQuery([1, 1], $filters));
-
     }
 
     /**
      * @expectedException \InvalidArgumentException
      * @depends testCalendarQueryNoResult
      */
-    function testCalendarQueryBadId() {
-
+    public function testCalendarQueryBadId()
+    {
         $abstract = new PDO($this->pdo);
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VJOURNAL',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VJOURNAL',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => null,
+                    'time-range' => null,
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $abstract->calendarQuery('bad-id', $filters);
-
     }
 
-    function testCalendarQueryTodo() {
-
+    public function testCalendarQueryTodo()
+    {
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'todo', "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'event', "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VTODO',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VTODO',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => null,
+                    'time-range' => null,
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $this->assertEquals([
-            "todo",
+            'todo',
         ], $backend->calendarQuery([1, 1], $filters));
-
     }
-    function testCalendarQueryTodoNotMatch() {
 
+    public function testCalendarQueryTodoNotMatch()
+    {
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'todo', "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'event', "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'         => 'VTODO',
+                    'name' => 'VTODO',
                     'comp-filters' => [],
                     'prop-filters' => [
                         [
-                            'name'           => 'summary',
-                            'text-match'     => null,
-                            'time-range'     => null,
-                            'param-filters'  => [],
+                            'name' => 'summary',
+                            'text-match' => null,
+                            'time-range' => null,
+                            'param-filters' => [],
                             'is-not-defined' => false,
                         ],
                     ],
                     'is-not-defined' => false,
-                    'time-range'     => null,
+                    'time-range' => null,
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $this->assertEquals([
         ], $backend->calendarQuery([1, 1], $filters));
-
     }
 
-    function testCalendarQueryNoFilter() {
-
+    public function testCalendarQueryNoFilter()
+    {
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'todo', "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'event', "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
-            'name'           => 'VCALENDAR',
-            'comp-filters'   => [],
-            'prop-filters'   => [],
+            'name' => 'VCALENDAR',
+            'comp-filters' => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $result = $backend->calendarQuery([1, 1], $filters);
         $this->assertTrue(in_array('todo', $result));
         $this->assertTrue(in_array('event', $result));
-
     }
 
-    function testCalendarQueryTimeRange() {
-
+    public function testCalendarQueryTimeRange()
+    {
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject([1, 1], "event2", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'todo', "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'event', "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'event2', "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => new \DateTime('20120103'),
-                        'end'   => new \DateTime('20120104'),
+                        'end' => new \DateTime('20120104'),
                     ],
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $this->assertEquals([
-            "event2",
+            'event2',
         ], $backend->calendarQuery([1, 1], $filters));
-
     }
-    function testCalendarQueryTimeRangeNoEnd() {
 
+    public function testCalendarQueryTimeRangeNoEnd()
+    {
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject([1, 1], "event2", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'todo', "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'event', "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], 'event2', "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => new \DateTime('20120102'),
-                        'end'   => null,
+                        'end' => null,
                     ],
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $this->assertEquals([
-            "event2",
+            'event2',
         ], $backend->calendarQuery([1, 1], $filters));
-
     }
 
-    function testGetChanges() {
-
+    public function testGetChanges()
+    {
         $backend = new PDO($this->pdo);
         $id = $backend->createCalendar(
             'principals/user1',
@@ -865,37 +823,37 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals([
             'syncToken' => 1,
-            'modified'  => [],
-            'deleted'   => [],
-            'added'     => [],
+            'modified' => [],
+            'deleted' => [],
+            'added' => [],
         ], $result);
 
         $currentToken = $result['syncToken'];
 
         $dummyTodo = "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n";
 
-        $backend->createCalendarObject($id, "todo1.ics", $dummyTodo);
-        $backend->createCalendarObject($id, "todo2.ics", $dummyTodo);
-        $backend->createCalendarObject($id, "todo3.ics", $dummyTodo);
-        $backend->updateCalendarObject($id, "todo1.ics", $dummyTodo);
-        $backend->deleteCalendarObject($id, "todo2.ics");
+        $backend->createCalendarObject($id, 'todo1.ics', $dummyTodo);
+        $backend->createCalendarObject($id, 'todo2.ics', $dummyTodo);
+        $backend->createCalendarObject($id, 'todo3.ics', $dummyTodo);
+        $backend->updateCalendarObject($id, 'todo1.ics', $dummyTodo);
+        $backend->deleteCalendarObject($id, 'todo2.ics');
 
         $result = $backend->getChangesForCalendar($id, $currentToken, 1);
 
         $this->assertEquals([
             'syncToken' => 6,
-            'modified'  => ["todo1.ics"],
-            'deleted'   => ["todo2.ics"],
-            'added'     => ["todo3.ics"],
+            'modified' => ['todo1.ics'],
+            'deleted' => ['todo2.ics'],
+            'added' => ['todo3.ics'],
         ], $result);
 
         $result = $backend->getChangesForCalendar($id, null, 1);
 
         $this->assertEquals([
             'syncToken' => 6,
-            'modified'  => [],
-            'deleted'   => [],
-            'added'     => ["todo1.ics", "todo3.ics"],
+            'modified' => [],
+            'deleted' => [],
+            'added' => ['todo1.ics', 'todo3.ics'],
         ], $result);
     }
 
@@ -903,8 +861,8 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
      * @depends testGetChanges
      * @expectedException \InvalidArgumentException
      */
-    function testGetChangesBadId() {
-
+    public function testGetChangesBadId()
+    {
         $backend = new PDO($this->pdo);
         $id = $backend->createCalendar(
             'principals/user1',
@@ -912,16 +870,15 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             []
         );
         $backend->getChangesForCalendar('bad-id', null, 1);
-
     }
 
-    function testCreateSubscriptions() {
-
+    public function testCreateSubscriptions()
+    {
         $props = [
-            '{http://calendarserver.org/ns/}source'                 => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
-            '{DAV:}displayname'                                     => 'cal',
-            '{http://apple.com/ns/ical/}refreshrate'                => 'P1W',
-            '{http://apple.com/ns/ical/}calendar-color'             => '#FF00FFFF',
+            '{http://calendarserver.org/ns/}source' => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
+            '{DAV:}displayname' => 'cal',
+            '{http://apple.com/ns/ical/}refreshrate' => 'P1W',
+            '{http://apple.com/ns/ical/}calendar-color' => '#FF00FFFF',
             '{http://calendarserver.org/ns/}subscribed-strip-todos' => true,
             //'{http://calendarserver.org/ns/}subscribed-strip-alarms' => true,
             '{http://calendarserver.org/ns/}subscribed-strip-attachments' => true,
@@ -944,29 +901,27 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         foreach ($expected as $k => $v) {
             $this->assertEquals($subs[0][$k], $expected[$k]);
         }
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testCreateSubscriptionFail() {
-
+    public function testCreateSubscriptionFail()
+    {
         $props = [
         ];
 
         $backend = new PDO($this->pdo);
         $backend->createSubscription('principals/user1', 'sub1', $props);
-
     }
 
-    function testUpdateSubscriptions() {
-
+    public function testUpdateSubscriptions()
+    {
         $props = [
-            '{http://calendarserver.org/ns/}source'                 => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
-            '{DAV:}displayname'                                     => 'cal',
-            '{http://apple.com/ns/ical/}refreshrate'                => 'P1W',
-            '{http://apple.com/ns/ical/}calendar-color'             => '#FF00FFFF',
+            '{http://calendarserver.org/ns/}source' => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
+            '{DAV:}displayname' => 'cal',
+            '{http://apple.com/ns/ical/}refreshrate' => 'P1W',
+            '{http://apple.com/ns/ical/}calendar-color' => '#FF00FFFF',
             '{http://calendarserver.org/ns/}subscribed-strip-todos' => true,
             //'{http://calendarserver.org/ns/}subscribed-strip-alarms' => true,
             '{http://calendarserver.org/ns/}subscribed-strip-attachments' => true,
@@ -976,7 +931,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $backend->createSubscription('principals/user1', 'sub1', $props);
 
         $newProps = [
-            '{DAV:}displayname'                     => 'new displayname',
+            '{DAV:}displayname' => 'new displayname',
             '{http://calendarserver.org/ns/}source' => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal2.ics', false),
         ];
 
@@ -1000,16 +955,15 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         foreach ($expected as $k => $v) {
             $this->assertEquals($subs[0][$k], $expected[$k]);
         }
-
     }
 
-    function testUpdateSubscriptionsFail() {
-
+    public function testUpdateSubscriptionsFail()
+    {
         $props = [
-            '{http://calendarserver.org/ns/}source'                 => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
-            '{DAV:}displayname'                                     => 'cal',
-            '{http://apple.com/ns/ical/}refreshrate'                => 'P1W',
-            '{http://apple.com/ns/ical/}calendar-color'             => '#FF00FFFF',
+            '{http://calendarserver.org/ns/}source' => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
+            '{DAV:}displayname' => 'cal',
+            '{http://apple.com/ns/ical/}refreshrate' => 'P1W',
+            '{http://apple.com/ns/ical/}calendar-color' => '#FF00FFFF',
             '{http://calendarserver.org/ns/}subscribed-strip-todos' => true,
             //'{http://calendarserver.org/ns/}subscribed-strip-alarms' => true,
             '{http://calendarserver.org/ns/}subscribed-strip-attachments' => true,
@@ -1019,29 +973,28 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $backend->createSubscription('principals/user1', 'sub1', $props);
 
         $propPatch = new DAV\PropPatch([
-            '{DAV:}displayname'                     => 'new displayname',
+            '{DAV:}displayname' => 'new displayname',
             '{http://calendarserver.org/ns/}source' => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal2.ics', false),
-            '{DAV:}unknown'                         => 'foo',
+            '{DAV:}unknown' => 'foo',
         ]);
 
         $backend->updateSubscription(1, $propPatch);
         $propPatch->commit();
 
         $this->assertEquals([
-            '{DAV:}unknown'                         => 403,
-            '{DAV:}displayname'                     => 424,
+            '{DAV:}unknown' => 403,
+            '{DAV:}displayname' => 424,
             '{http://calendarserver.org/ns/}source' => 424,
         ], $propPatch->getResult());
-
     }
 
-    function testDeleteSubscriptions() {
-
+    public function testDeleteSubscriptions()
+    {
         $props = [
-            '{http://calendarserver.org/ns/}source'                 => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
-            '{DAV:}displayname'                                     => 'cal',
-            '{http://apple.com/ns/ical/}refreshrate'                => 'P1W',
-            '{http://apple.com/ns/ical/}calendar-color'             => '#FF00FFFF',
+            '{http://calendarserver.org/ns/}source' => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal.ics', false),
+            '{DAV:}displayname' => 'cal',
+            '{http://apple.com/ns/ical/}refreshrate' => 'P1W',
+            '{http://apple.com/ns/ical/}calendar-color' => '#FF00FFFF',
             '{http://calendarserver.org/ns/}subscribed-strip-todos' => true,
             //'{http://calendarserver.org/ns/}subscribed-strip-alarms' => true,
             '{http://calendarserver.org/ns/}subscribed-strip-attachments' => true,
@@ -1051,7 +1004,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $backend->createSubscription('principals/user1', 'sub1', $props);
 
         $newProps = [
-            '{DAV:}displayname'                     => 'new displayname',
+            '{DAV:}displayname' => 'new displayname',
             '{http://calendarserver.org/ns/}source' => new \Sabre\DAV\Xml\Property\Href('http://example.org/cal2.ics', false),
         ];
 
@@ -1061,8 +1014,8 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(0, count($subs));
     }
 
-    function testSchedulingMethods() {
-
+    public function testSchedulingMethods()
+    {
         $backend = new PDO($this->pdo);
 
         $calData = "BEGIN:VCALENDAR\r\nEND:VCALENDAR\r\n";
@@ -1075,9 +1028,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $expected = [
             'calendardata' => $calData,
-            'uri'          => 'schedule1.ics',
-            'etag'         => '"' . md5($calData) . '"',
-            'size'         => strlen($calData)
+            'uri' => 'schedule1.ics',
+            'etag' => '"'.md5($calData).'"',
+            'size' => strlen($calData),
         ];
 
         $result = $backend->getSchedulingObject('principals/user1', 'schedule1.ics');
@@ -1104,11 +1057,10 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $result = $backend->getSchedulingObject('principals/user1', 'schedule1.ics');
 
         $this->assertNull($result);
-
     }
 
-    function testGetInvites() {
-
+    public function testGetInvites()
+    {
         $backend = new PDO($this->pdo);
 
         // creating a new calendar
@@ -1118,23 +1070,22 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $result = $backend->getInvites($calendar['id']);
         $expected = [
             new Sharee([
-                'href'         => 'principals/user1',
-                'principal'    => 'principals/user1',
-                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+                'href' => 'principals/user1',
+                'principal' => 'principals/user1',
+                'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
                 'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
-            ])
+            ]),
         ];
 
         $this->assertEquals($expected, $result);
-
     }
 
     /**
      * @depends testGetInvites
      * @expectedException \InvalidArgumentException
      */
-    function testGetInvitesBadId() {
-
+    public function testGetInvitesBadId()
+    {
         $backend = new PDO($this->pdo);
 
         // creating a new calendar
@@ -1142,14 +1093,13 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $calendar = $backend->getCalendarsForUser('principals/user1')[0];
 
         $backend->getInvites('bad-id');
-
     }
 
     /**
      * @depends testCreateCalendarAndFetch
      */
-    function testUpdateInvites() {
-
+    public function testUpdateInvites()
+    {
         $backend = new PDO($this->pdo);
 
         // creating a new calendar
@@ -1157,9 +1107,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $calendar = $backend->getCalendarsForUser('principals/user1')[0];
 
         $ownerSharee = new Sharee([
-            'href'         => 'principals/user1',
-            'principal'    => 'principals/user1',
-            'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+            'href' => 'principals/user1',
+            'principal' => 'principals/user1',
+            'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
             'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
         ]);
 
@@ -1168,12 +1118,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $calendar['id'],
             [
                 new Sharee([
-                    'href'         => 'mailto:user@example.org',
-                    'principal'    => 'principals/user2',
-                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                    'href' => 'mailto:user@example.org',
+                    'principal' => 'principals/user2',
+                    'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
                     'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
-                    'properties'   => ['{DAV:}displayname' => 'User 2'],
-                ])
+                    'properties' => ['{DAV:}displayname' => 'User 2'],
+                ]),
             ]
         );
 
@@ -1181,26 +1131,26 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $expected = [
             $ownerSharee,
             new Sharee([
-                'href'         => 'mailto:user@example.org',
-                'principal'    => 'principals/user2',
-                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                'href' => 'mailto:user@example.org',
+                'principal' => 'principals/user2',
+                'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
                 'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
-                'properties'   => [
+                'properties' => [
                     '{DAV:}displayname' => 'User 2',
                 ],
-            ])
+            ]),
         ];
         $this->assertEquals($expected, $result);
 
         // Checking calendar_instances too
         $expectedCalendar = [
-            'id'                                     => [1,2],
-            'principaluri'                           => 'principals/user2',
+            'id' => [1, 2],
+            'principaluri' => 'principals/user2',
             '{http://calendarserver.org/ns/}getctag' => 'http://sabre.io/ns/sync/1',
-            '{http://sabredav.org/ns}sync-token'     => '1',
-            'share-access'                           => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
-            'read-only'                              => true,
-            'share-resource-uri'                     => '/ns/share/1',
+            '{http://sabredav.org/ns}sync-token' => '1',
+            'share-access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+            'read-only' => true,
+            'share-resource-uri' => '/ns/share/1',
         ];
         $calendars = $backend->getCalendarsForUser('principals/user2');
 
@@ -1208,21 +1158,20 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $this->assertEquals(
                 $v,
                 $calendars[0][$k],
-                "Key " . $k . " in calendars array did not have the expected value."
+                'Key '.$k.' in calendars array did not have the expected value.'
             );
         }
 
-
         // Updating an invite
         $backend->updateInvites(
             $calendar['id'],
             [
                 new Sharee([
-                    'href'         => 'mailto:user@example.org',
-                    'principal'    => 'principals/user2',
-                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
+                    'href' => 'mailto:user@example.org',
+                    'principal' => 'principals/user2',
+                    'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
                     'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
-                ])
+                ]),
             ]
         );
 
@@ -1230,14 +1179,14 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $expected = [
             $ownerSharee,
             new Sharee([
-                'href'         => 'mailto:user@example.org',
-                'principal'    => 'principals/user2',
-                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
+                'href' => 'mailto:user@example.org',
+                'principal' => 'principals/user2',
+                'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
                 'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
-                'properties'   => [
+                'properties' => [
                     '{DAV:}displayname' => 'User 2',
                 ],
-            ])
+            ]),
         ];
         $this->assertEquals($expected, $result);
 
@@ -1246,15 +1195,15 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $calendar['id'],
             [
                 new Sharee([
-                    'href'   => 'mailto:user@example.org',
+                    'href' => 'mailto:user@example.org',
                     'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS,
-                ])
+                ]),
             ]
         );
 
         $result = $backend->getInvites($calendar['id']);
         $expected = [
-            $ownerSharee
+            $ownerSharee,
         ];
         $this->assertEquals($expected, $result);
 
@@ -1263,45 +1212,43 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $calendar['id'],
             [
                 new Sharee([
-                    'href'   => 'principals/user2',
+                    'href' => 'principals/user2',
                     'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS,
-                ])
+                ]),
             ]
         );
 
         $result = $backend->getInvites($calendar['id']);
         $expected = [
             new Sharee([
-                'href'         => 'principals/user1',
-                'principal'    => 'principals/user1',
-                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+                'href' => 'principals/user1',
+                'principal' => 'principals/user1',
+                'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
                 'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
             ]),
         ];
         $this->assertEquals($expected, $result);
-
     }
 
     /**
      * @depends testUpdateInvites
      * @expectedException \InvalidArgumentException
      */
-    function testUpdateInvitesBadId() {
-
+    public function testUpdateInvitesBadId()
+    {
         $backend = new PDO($this->pdo);
         // Add a new invite
         $backend->updateInvites(
             'bad-id',
             []
         );
-
     }
 
     /**
      * @depends testUpdateInvites
      */
-    function testUpdateInvitesNoPrincipal() {
-
+    public function testUpdateInvitesNoPrincipal()
+    {
         $backend = new PDO($this->pdo);
 
         // creating a new calendar
@@ -1309,9 +1256,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $calendar = $backend->getCalendarsForUser('principals/user1')[0];
 
         $ownerSharee = new Sharee([
-            'href'         => 'principals/user1',
-            'principal'    => 'principals/user1',
-            'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+            'href' => 'principals/user1',
+            'principal' => 'principals/user1',
+            'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
             'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
         ]);
 
@@ -1320,12 +1267,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $calendar['id'],
             [
                 new Sharee([
-                    'href'         => 'mailto:user@example.org',
-                    'principal'    => null,
-                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                    'href' => 'mailto:user@example.org',
+                    'principal' => null,
+                    'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
                     'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
-                    'properties'   => ['{DAV:}displayname' => 'User 2'],
-                ])
+                    'properties' => ['{DAV:}displayname' => 'User 2'],
+                ]),
             ]
         );
 
@@ -1333,24 +1280,23 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $expected = [
             $ownerSharee,
             new Sharee([
-                'href'         => 'mailto:user@example.org',
-                'principal'    => null,
-                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                'href' => 'mailto:user@example.org',
+                'principal' => null,
+                'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
                 'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_INVALID,
-                'properties'   => [
+                'properties' => [
                     '{DAV:}displayname' => 'User 2',
                 ],
-            ])
+            ]),
         ];
         $this->assertEquals($expected, $result, null, 0.0, 10, true); // Last argument is $canonicalize = true, which allows us to compare, ignoring the order, because it's different between MySQL and Sqlite.
-
     }
 
     /**
      * @depends testUpdateInvites
      */
-    function testDeleteSharedCalendar() {
-
+    public function testDeleteSharedCalendar()
+    {
         $backend = new PDO($this->pdo);
 
         // creating a new calendar
@@ -1358,9 +1304,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $calendar = $backend->getCalendarsForUser('principals/user1')[0];
 
         $ownerSharee = new Sharee([
-            'href'         => 'principals/user1',
-            'principal'    => 'principals/user1',
-            'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+            'href' => 'principals/user1',
+            'principal' => 'principals/user1',
+            'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
             'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
         ]);
 
@@ -1369,23 +1315,23 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $calendar['id'],
             [
                 new Sharee([
-                    'href'         => 'mailto:user@example.org',
-                    'principal'    => 'principals/user2',
-                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                    'href' => 'mailto:user@example.org',
+                    'principal' => 'principals/user2',
+                    'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
                     'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
-                    'properties'   => ['{DAV:}displayname' => 'User 2'],
-                ])
+                    'properties' => ['{DAV:}displayname' => 'User 2'],
+                ]),
             ]
         );
 
         $expectedCalendar = [
-            'id'                                     => [1,2],
-            'principaluri'                           => 'principals/user2',
+            'id' => [1, 2],
+            'principaluri' => 'principals/user2',
             '{http://calendarserver.org/ns/}getctag' => 'http://sabre.io/ns/sync/1',
-            '{http://sabredav.org/ns}sync-token'     => '1',
-            'share-access'                           => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
-            'read-only'                              => true,
-            'share-resource-uri'                     => '/ns/share/1',
+            '{http://sabredav.org/ns}sync-token' => '1',
+            'share-access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+            'read-only' => true,
+            'share-resource-uri' => '/ns/share/1',
         ];
         $calendars = $backend->getCalendarsForUser('principals/user2');
 
@@ -1393,7 +1339,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $this->assertEquals(
                 $v,
                 $calendars[0][$k],
-                "Key " . $k . " in calendars array did not have the expected value."
+                'Key '.$k.' in calendars array did not have the expected value.'
             );
         }
 
@@ -1408,24 +1354,21 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $result = $backend->getInvites($calendar['id']);
         $expected = [
             new Sharee([
-                'href'         => 'principals/user1',
-                'principal'    => 'principals/user1',
-                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+                'href' => 'principals/user1',
+                'principal' => 'principals/user1',
+                'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
                 'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
             ]),
         ];
         $this->assertEquals($expected, $result);
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\NotImplemented
      */
-    function testSetPublishStatus() {
-
+    public function testSetPublishStatus()
+    {
         $backend = new PDO($this->pdo);
         $backend->setPublishStatus([1, 1], true);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractTest.php
index 7f642efc9..166de1dab 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractTest.php
@@ -1,14 +1,16 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use
     Sabre\DAV\PropPatch;
 
-class AbstractTest extends \PHPUnit_Framework_TestCase {
-
-    function testUpdateCalendar() {
-
+class AbstractTest extends \PHPUnit\Framework\TestCase
+{
+    public function testUpdateCalendar()
+    {
         $abstract = new AbstractMock();
         $propPatch = new PropPatch(['{DAV:}displayname' => 'anything']);
 
@@ -16,36 +18,34 @@ class AbstractTest extends \PHPUnit_Framework_TestCase {
         $result = $propPatch->commit();
 
         $this->assertFalse($result);
-
     }
 
-    function testCalendarQuery() {
-
+    public function testCalendarQuery()
+    {
         $abstract = new AbstractMock();
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => null,
+                    'time-range' => null,
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $this->assertEquals([
             'event1.ics',
         ], $abstract->calendarQuery(1, $filters));
-
     }
 
-    function testGetCalendarObjectByUID() {
-
+    public function testGetCalendarObjectByUID()
+    {
         $abstract = new AbstractMock();
         $this->assertNull(
             $abstract->getCalendarObjectByUID('principal1', 'zim')
@@ -60,11 +60,10 @@ class AbstractTest extends \PHPUnit_Framework_TestCase {
         $this->assertNull(
             $abstract->getCalendarObjectByUID('principal1', 'shared')
         );
-
     }
 
-    function testGetMultipleCalendarObjects() {
-
+    public function testGetMultipleCalendarObjects()
+    {
         $abstract = new AbstractMock();
         $result = $abstract->getMultipleCalendarObjects(1, [
             'event1.ics',
@@ -73,106 +72,113 @@ class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $expected = [
             [
-                'id'           => 1,
-                'calendarid'   => 1,
-                'uri'          => 'event1.ics',
+                'id' => 1,
+                'calendarid' => 1,
+                'uri' => 'event1.ics',
                 'calendardata' => "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
             ],
             [
-                'id'           => 2,
-                'calendarid'   => 1,
-                'uri'          => 'task1.ics',
+                'id' => 2,
+                'calendarid' => 1,
+                'uri' => 'task1.ics',
                 'calendardata' => "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n",
             ],
         ];
 
         $this->assertEquals($expected, $result);
-
-
     }
-
 }
 
-class AbstractMock extends AbstractBackend {
-
-    function getCalendarsForUser($principalUri) {
-
+class AbstractMock extends AbstractBackend
+{
+    public function getCalendarsForUser($principalUri)
+    {
         return [
             [
-                'id'           => 1,
+                'id' => 1,
                 'principaluri' => 'principal1',
-                'uri'          => 'cal1',
+                'uri' => 'cal1',
             ],
             [
-                'id'                                      => 2,
-                'principaluri'                            => 'principal1',
+                'id' => 2,
+                'principaluri' => 'principal1',
                 '{http://sabredav.org/ns}owner-principal' => 'principal2',
-                'uri'                                     => 'cal1',
+                'uri' => 'cal1',
             ],
         ];
+    }
+
+    public function createCalendar($principalUri, $calendarUri, array $properties)
+    {
+    }
 
+    public function deleteCalendar($calendarId)
+    {
     }
-    function createCalendar($principalUri, $calendarUri, array $properties) { }
-    function deleteCalendar($calendarId) { }
-    function getCalendarObjects($calendarId) {
 
+    public function getCalendarObjects($calendarId)
+    {
         switch ($calendarId) {
             case 1:
                 return [
                     [
-                        'id'         => 1,
+                        'id' => 1,
                         'calendarid' => 1,
-                        'uri'        => 'event1.ics',
+                        'uri' => 'event1.ics',
                     ],
                     [
-                        'id'         => 2,
+                        'id' => 2,
                         'calendarid' => 1,
-                        'uri'        => 'task1.ics',
+                        'uri' => 'task1.ics',
                     ],
                 ];
             case 2:
                 return [
                     [
-                        'id'         => 3,
+                        'id' => 3,
                         'calendarid' => 2,
-                        'uri'        => 'shared-event.ics',
-                    ]
+                        'uri' => 'shared-event.ics',
+                    ],
                 ];
         }
-
     }
 
-    function getCalendarObject($calendarId, $objectUri) {
-
+    public function getCalendarObject($calendarId, $objectUri)
+    {
         switch ($objectUri) {
-
-            case 'event1.ics' :
+            case 'event1.ics':
                 return [
-                    'id'           => 1,
-                    'calendarid'   => 1,
-                    'uri'          => 'event1.ics',
+                    'id' => 1,
+                    'calendarid' => 1,
+                    'uri' => 'event1.ics',
                     'calendardata' => "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
                 ];
-            case 'task1.ics' :
+            case 'task1.ics':
                 return [
-                    'id'           => 2,
-                    'calendarid'   => 1,
-                    'uri'          => 'task1.ics',
+                    'id' => 2,
+                    'calendarid' => 1,
+                    'uri' => 'task1.ics',
                     'calendardata' => "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n",
                 ];
-            case 'shared-event.ics' :
+            case 'shared-event.ics':
                 return [
-                    'id'           => 3,
-                    'calendarid'   => 2,
-                    'uri'          => 'event1.ics',
+                    'id' => 3,
+                    'calendarid' => 2,
+                    'uri' => 'event1.ics',
                     'calendardata' => "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:shared\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
                 ];
-
         }
+    }
 
+    public function createCalendarObject($calendarId, $objectUri, $calendarData)
+    {
     }
-    function createCalendarObject($calendarId, $objectUri, $calendarData) { }
-    function updateCalendarObject($calendarId, $objectUri, $calendarData) { }
-    function deleteCalendarObject($calendarId, $objectUri) { }
 
+    public function updateCalendarObject($calendarId, $objectUri, $calendarData)
+    {
+    }
+
+    public function deleteCalendarObject($calendarId, $objectUri)
+    {
+    }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php
index cc665cd8f..9f18eeb72 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php
@@ -1,17 +1,19 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Backend;
 
 use Sabre\CalDAV;
 use Sabre\DAV;
 
-class Mock extends AbstractBackend {
-
+class Mock extends AbstractBackend
+{
     protected $calendarData;
     protected $calendars;
 
-    function __construct(array $calendars = [], array $calendarData = []) {
-
+    public function __construct(array $calendars = [], array $calendarData = [])
+    {
         foreach ($calendars as &$calendar) {
             if (!isset($calendar['id'])) {
                 $calendar['id'] = DAV\UUIDUtil::getUUID();
@@ -20,7 +22,6 @@ class Mock extends AbstractBackend {
 
         $this->calendars = $calendars;
         $this->calendarData = $calendarData;
-
     }
 
     /**
@@ -38,10 +39,11 @@ class Mock extends AbstractBackend {
      * common one is '{DAV:}displayname'.
      *
      * @param string $principalUri
+     *
      * @return array
      */
-    function getCalendarsForUser($principalUri) {
-
+    public function getCalendarsForUser($principalUri)
+    {
         $r = [];
         foreach ($this->calendars as $row) {
             if ($row['principaluri'] == $principalUri) {
@@ -50,7 +52,6 @@ class Mock extends AbstractBackend {
         }
 
         return $r;
-
     }
 
     /**
@@ -64,21 +65,21 @@ class Mock extends AbstractBackend {
      *
      * @param string $principalUri
      * @param string $calendarUri
-     * @param array $properties
+     * @param array  $properties
+     *
      * @return string|int
      */
-    function createCalendar($principalUri, $calendarUri, array $properties) {
-
+    public function createCalendar($principalUri, $calendarUri, array $properties)
+    {
         $id = DAV\UUIDUtil::getUUID();
         $this->calendars[] = array_merge([
-            'id'                                                                 => $id,
-            'principaluri'                                                       => $principalUri,
-            'uri'                                                                => $calendarUri,
-            '{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO']),
+            'id' => $id,
+            'principaluri' => $principalUri,
+            'uri' => $calendarUri,
+            '{'.CalDAV\Plugin::NS_CALDAV.'}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO']),
         ], $properties);
 
         return $id;
-
     }
 
     /**
@@ -93,16 +94,13 @@ class Mock extends AbstractBackend {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param mixed $calendarId
+     * @param mixed                $calendarId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch) {
-
-        $propPatch->handleRemaining(function($props) use ($calendarId) {
-
+    public function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch)
+    {
+        $propPatch->handleRemaining(function ($props) use ($calendarId) {
             foreach ($this->calendars as $k => $calendar) {
-
                 if ($calendar['id'] === $calendarId) {
                     foreach ($props as $propName => $propValue) {
                         if (is_null($propValue)) {
@@ -111,30 +109,25 @@ class Mock extends AbstractBackend {
                             $this->calendars[$k][$propName] = $propValue;
                         }
                     }
-                    return true;
 
+                    return true;
                 }
-
             }
-
         });
-
     }
 
     /**
-     * Delete a calendar and all it's objects
+     * Delete a calendar and all it's objects.
      *
      * @param string $calendarId
-     * @return void
      */
-    function deleteCalendar($calendarId) {
-
+    public function deleteCalendar($calendarId)
+    {
         foreach ($this->calendars as $k => $calendar) {
             if ($calendar['id'] === $calendarId) {
                 unset($this->calendars[$k]);
             }
         }
-
     }
 
     /**
@@ -157,12 +150,14 @@ class Mock extends AbstractBackend {
      * calendardata.
      *
      * @param string $calendarId
+     *
      * @return array
      */
-    function getCalendarObjects($calendarId) {
-
-        if (!isset($this->calendarData[$calendarId]))
+    public function getCalendarObjects($calendarId)
+    {
+        if (!isset($this->calendarData[$calendarId])) {
             return [];
+        }
 
         $objects = $this->calendarData[$calendarId];
 
@@ -171,8 +166,8 @@ class Mock extends AbstractBackend {
             $object['uri'] = $uri;
             $object['lastmodified'] = null;
         }
-        return $objects;
 
+        return $objects;
     }
 
     /**
@@ -187,12 +182,13 @@ class Mock extends AbstractBackend {
      *
      * This method must return null if the object did not exist.
      *
-     * @param mixed $calendarId
+     * @param mixed  $calendarId
      * @param string $objectUri
+     *
      * @return array|null
      */
-    function getCalendarObject($calendarId, $objectUri) {
-
+    public function getCalendarObject($calendarId, $objectUri)
+    {
         if (!isset($this->calendarData[$calendarId][$objectUri])) {
             return null;
         }
@@ -200,8 +196,8 @@ class Mock extends AbstractBackend {
         $object['calendarid'] = $calendarId;
         $object['uri'] = $objectUri;
         $object['lastmodified'] = null;
-        return $object;
 
+        return $object;
     }
 
     /**
@@ -210,17 +206,16 @@ class Mock extends AbstractBackend {
      * @param string $calendarId
      * @param string $objectUri
      * @param string $calendarData
-     * @return void
      */
-    function createCalendarObject($calendarId, $objectUri, $calendarData) {
-
+    public function createCalendarObject($calendarId, $objectUri, $calendarData)
+    {
         $this->calendarData[$calendarId][$objectUri] = [
             'calendardata' => $calendarData,
-            'calendarid'   => $calendarId,
-            'uri'          => $objectUri,
+            'calendarid' => $calendarId,
+            'uri' => $objectUri,
         ];
-        return '"' . md5($calendarData) . '"';
 
+        return '"'.md5($calendarData).'"';
     }
 
     /**
@@ -229,17 +224,16 @@ class Mock extends AbstractBackend {
      * @param string $calendarId
      * @param string $objectUri
      * @param string $calendarData
-     * @return void
      */
-    function updateCalendarObject($calendarId, $objectUri, $calendarData) {
-
+    public function updateCalendarObject($calendarId, $objectUri, $calendarData)
+    {
         $this->calendarData[$calendarId][$objectUri] = [
             'calendardata' => $calendarData,
-            'calendarid'   => $calendarId,
-            'uri'          => $objectUri,
+            'calendarid' => $calendarId,
+            'uri' => $objectUri,
         ];
-        return '"' . md5($calendarData) . '"';
 
+        return '"'.md5($calendarData).'"';
     }
 
     /**
@@ -247,12 +241,9 @@ class Mock extends AbstractBackend {
      *
      * @param string $calendarId
      * @param string $objectUri
-     * @return void
      */
-    function deleteCalendarObject($calendarId, $objectUri) {
-
+    public function deleteCalendarObject($calendarId, $objectUri)
+    {
         unset($this->calendarData[$calendarId][$objectUri]);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php
index e068ff1e7..66388def4 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\CalDAV\Backend;
+declare(strict_types=1);
 
-class PDOMySQLTest extends AbstractPDOTest {
+namespace Sabre\CalDAV\Backend;
 
+class PDOMySQLTest extends AbstractPDOTest
+{
     public $driver = 'mysql';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php
index 90ad5a171..4470e5810 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\CalDAV\Backend;
+declare(strict_types=1);
 
-class PDOSqliteTest extends AbstractPDOTest {
+namespace Sabre\CalDAV\Backend;
 
+class PDOSqliteTest extends AbstractPDOTest
+{
     public $driver = 'sqlite';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php
index c92cde661..d6073514f 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 require_once 'Sabre/CalDAV/TestUtil.php';
 
-class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
-
+class CalendarObjectTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var Sabre\CalDAV\Backend_PDO
      */
@@ -16,25 +18,23 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
     protected $calendar;
     protected $principalBackend;
 
-    function setup() {
-
+    public function setup()
+    {
         $this->backend = TestUtil::getBackend();
 
         $calendars = $this->backend->getCalendarsForUser('principals/user1');
         $this->assertEquals(2, count($calendars));
         $this->calendar = new Calendar($this->backend, $calendars[0]);
-
     }
 
-    function teardown() {
-
+    public function teardown()
+    {
         unset($this->calendar);
         unset($this->backend);
-
     }
 
-    function testSetup() {
-
+    public function testSetup()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
@@ -42,54 +42,50 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
         $this->assertInternalType('string', $children[0]->get());
         $this->assertInternalType('string', $children[0]->getETag());
         $this->assertEquals('text/calendar; charset=utf-8', $children[0]->getContentType());
-
     }
 
     /**
-     * @expectedException InvalidArgumentException
+     * @expectedException \InvalidArgumentException
      */
-    function testInvalidArg1() {
-
+    public function testInvalidArg1()
+    {
         $obj = new CalendarObject(
             new Backend\Mock([], []),
             [],
             []
         );
-
     }
 
     /**
-     * @expectedException InvalidArgumentException
+     * @expectedException \InvalidArgumentException
      */
-    function testInvalidArg2() {
-
+    public function testInvalidArg2()
+    {
         $obj = new CalendarObject(
             new Backend\Mock([], []),
             [],
             ['calendarid' => '1']
         );
-
     }
 
     /**
      * @depends testSetup
      */
-    function testPut() {
-
+    public function testPut()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
         $newData = TestUtil::getTestCalendarData();
 
         $children[0]->put($newData);
         $this->assertEquals($newData, $children[0]->get());
-
     }
 
     /**
      * @depends testSetup
      */
-    function testPutStream() {
-
+    public function testPutStream()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
         $newData = TestUtil::getTestCalendarData();
@@ -99,15 +95,13 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
         rewind($stream);
         $children[0]->put($stream);
         $this->assertEquals($newData, $children[0]->get());
-
     }
 
-
     /**
      * @depends testSetup
      */
-    function testDelete() {
-
+    public function testDelete()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
@@ -116,14 +110,13 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
 
         $children2 = $this->calendar->getChildren();
         $this->assertEquals(count($children) - 1, count($children2));
-
     }
 
     /**
      * @depends testSetup
      */
-    function testGetLastModified() {
-
+    public function testGetLastModified()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
@@ -131,14 +124,13 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
 
         $lastMod = $obj->getLastModified();
         $this->assertTrue(is_int($lastMod) || ctype_digit($lastMod) || is_null($lastMod));
-
     }
 
     /**
      * @depends testSetup
      */
-    function testGetSize() {
-
+    public function testGetSize()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
@@ -146,31 +138,28 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
 
         $size = $obj->getSize();
         $this->assertInternalType('int', $size);
-
     }
 
-    function testGetOwner() {
-
+    public function testGetOwner()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
         $obj = $children[0];
         $this->assertEquals('principals/user1', $obj->getOwner());
-
     }
 
-    function testGetGroup() {
-
+    public function testGetGroup()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
         $obj = $children[0];
         $this->assertNull($obj->getGroup());
-
     }
 
-    function testGetACL() {
-
+    public function testGetACL()
+    {
         $expected = [
             [
                 'privilege' => '{DAV:}read',
@@ -204,11 +193,10 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
 
         $obj = $children[0];
         $this->assertEquals($expected, $obj->getACL());
-
     }
 
-    function testDefaultACL() {
-
+    public function testDefaultACL()
+    {
         $backend = new Backend\Mock([], []);
         $calendarObject = new CalendarObject($backend, ['principaluri' => 'principals/user1'], ['calendarid' => 1, 'uri' => 'foo']);
         $expected = [
@@ -229,31 +217,28 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
             ],
         ];
         $this->assertEquals($expected, $calendarObject->getACL());
-
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetACL() {
-
+    public function testSetACL()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
         $obj = $children[0];
         $obj->setACL([]);
-
     }
 
-    function testGet() {
-
+    public function testGet()
+    {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
         $obj = $children[0];
 
-            $expected = "BEGIN:VCALENDAR
+        $expected = 'BEGIN:VCALENDAR
 VERSION:2.0
 PRODID:-//Apple Inc.//iCal 4.0.1//EN
 CALSCALE:GREGORIAN
@@ -284,100 +269,91 @@ DTEND;TZID=Asia/Seoul:20100223T070000
 ATTENDEE;PARTSTAT=NEEDS-ACTION:mailto:lisa@example.com
 SEQUENCE:2
 END:VEVENT
-END:VCALENDAR";
-
-
+END:VCALENDAR';
 
         $this->assertEquals($expected, $obj->get());
-
     }
 
-    function testGetRefetch() {
-
+    public function testGetRefetch()
+    {
         $backend = new Backend\Mock([], [
             1 => [
                 'foo' => [
                     'calendardata' => 'foo',
-                    'uri'          => 'foo'
+                    'uri' => 'foo',
                 ],
-            ]
+            ],
         ]);
         $obj = new CalendarObject($backend, ['id' => 1], ['uri' => 'foo']);
 
         $this->assertEquals('foo', $obj->get());
-
     }
 
-    function testGetEtag1() {
-
+    public function testGetEtag1()
+    {
         $objectInfo = [
             'calendardata' => 'foo',
-            'uri'          => 'foo',
-            'etag'         => 'bar',
-            'calendarid'   => 1
+            'uri' => 'foo',
+            'etag' => 'bar',
+            'calendarid' => 1,
         ];
 
         $backend = new Backend\Mock([], []);
         $obj = new CalendarObject($backend, [], $objectInfo);
 
         $this->assertEquals('bar', $obj->getETag());
-
     }
 
-    function testGetEtag2() {
-
+    public function testGetEtag2()
+    {
         $objectInfo = [
             'calendardata' => 'foo',
-            'uri'          => 'foo',
-            'calendarid'   => 1
+            'uri' => 'foo',
+            'calendarid' => 1,
         ];
 
         $backend = new Backend\Mock([], []);
         $obj = new CalendarObject($backend, [], $objectInfo);
 
-        $this->assertEquals('"' . md5('foo') . '"', $obj->getETag());
-
+        $this->assertEquals('"'.md5('foo').'"', $obj->getETag());
     }
 
-    function testGetSupportedPrivilegesSet() {
-
+    public function testGetSupportedPrivilegesSet()
+    {
         $objectInfo = [
             'calendardata' => 'foo',
-            'uri'          => 'foo',
-            'calendarid'   => 1
+            'uri' => 'foo',
+            'calendarid' => 1,
         ];
 
         $backend = new Backend\Mock([], []);
         $obj = new CalendarObject($backend, [], $objectInfo);
         $this->assertNull($obj->getSupportedPrivilegeSet());
-
     }
 
-    function testGetSize1() {
-
+    public function testGetSize1()
+    {
         $objectInfo = [
             'calendardata' => 'foo',
-            'uri'          => 'foo',
-            'calendarid'   => 1
+            'uri' => 'foo',
+            'calendarid' => 1,
         ];
 
         $backend = new Backend\Mock([], []);
         $obj = new CalendarObject($backend, [], $objectInfo);
         $this->assertEquals(3, $obj->getSize());
-
     }
 
-    function testGetSize2() {
-
+    public function testGetSize2()
+    {
         $objectInfo = [
-            'uri'        => 'foo',
+            'uri' => 'foo',
             'calendarid' => 1,
-            'size'       => 4,
+            'size' => 4,
         ];
 
         $backend = new Backend\Mock([], []);
         $obj = new CalendarObject($backend, [], $objectInfo);
         $this->assertEquals(4, $obj->getSize());
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php
index ca06d8ffa..660832ba4 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php
@@ -1,17 +1,19 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\VObject;
 
-class CalendarQueryVAlarmTest extends \PHPUnit_Framework_TestCase {
-
+class CalendarQueryVAlarmTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * This test is specifically for a time-range query on a VALARM, contained
-     * in a VEVENT that's recurring
+     * in a VEVENT that's recurring.
      */
-    function testValarm() {
-
+    public function testValarm()
+    {
         $vcalendar = new VObject\Component\VCalendar();
 
         $vevent = $vcalendar->createComponent('VEVENT');
@@ -23,29 +25,28 @@ class CalendarQueryVAlarmTest extends \PHPUnit_Framework_TestCase {
         $valarm->TRIGGER = '-P15D';
         $vevent->add($valarm);
 
-
         $vcalendar->add($vevent);
 
         $filter = [
-            'name'           => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'is-not-defined' => false,
-            'time-range'     => null,
-            'prop-filters'   => [],
-            'comp-filters'   => [
+            'time-range' => null,
+            'prop-filters' => [],
+            'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
+                    'name' => 'VEVENT',
                     'is-not-defined' => false,
-                    'time-range'     => null,
-                    'prop-filters'   => [],
-                    'comp-filters'   => [
+                    'time-range' => null,
+                    'prop-filters' => [],
+                    'comp-filters' => [
                         [
-                            'name'           => 'VALARM',
+                            'name' => 'VALARM',
                             'is-not-defined' => false,
-                            'prop-filters'   => [],
-                            'comp-filters'   => [],
-                            'time-range'     => [
+                            'prop-filters' => [],
+                            'comp-filters' => [],
+                            'time-range' => [
                                 'start' => new \DateTime('2012-05-10'),
-                                'end'   => new \DateTime('2012-05-20'),
+                                'end' => new \DateTime('2012-05-20'),
                             ],
                         ],
                     ],
@@ -73,8 +74,8 @@ class CalendarQueryVAlarmTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse($validator->validate($vcalendar, $filter));
     }
 
-    function testAlarmWayBefore() {
-
+    public function testAlarmWayBefore()
+    {
         $vcalendar = new VObject\Component\VCalendar();
 
         $vevent = $vcalendar->createComponent('VEVENT');
@@ -88,25 +89,25 @@ class CalendarQueryVAlarmTest extends \PHPUnit_Framework_TestCase {
         $vcalendar->add($vevent);
 
         $filter = [
-            'name'           => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'is-not-defined' => false,
-            'time-range'     => null,
-            'prop-filters'   => [],
-            'comp-filters'   => [
+            'time-range' => null,
+            'prop-filters' => [],
+            'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
+                    'name' => 'VEVENT',
                     'is-not-defined' => false,
-                    'time-range'     => null,
-                    'prop-filters'   => [],
-                    'comp-filters'   => [
+                    'time-range' => null,
+                    'prop-filters' => [],
+                    'comp-filters' => [
                         [
-                            'name'           => 'VALARM',
+                            'name' => 'VALARM',
                             'is-not-defined' => false,
-                            'prop-filters'   => [],
-                            'comp-filters'   => [],
-                            'time-range'     => [
+                            'prop-filters' => [],
+                            'comp-filters' => [],
+                            'time-range' => [
                                 'start' => new \DateTime('2011-12-10'),
-                                'end'   => new \DateTime('2011-12-20'),
+                                'end' => new \DateTime('2011-12-20'),
                             ],
                         ],
                     ],
@@ -116,7 +117,5 @@ class CalendarQueryVAlarmTest extends \PHPUnit_Framework_TestCase {
 
         $validator = new CalendarQueryValidator();
         $this->assertTrue($validator->validate($vcalendar, $filter));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php
index f3305163b..9dc8ce188 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\VObject;
 
-class CalendarQueryValidatorTest extends \PHPUnit_Framework_TestCase {
-
-    function testTopLevelFail() {
-
+class CalendarQueryValidatorTest extends \PHPUnit\Framework\TestCase
+{
+    public function testTopLevelFail()
+    {
         $validator = new CalendarQueryValidator();
         $vcal = <<<ICS
 BEGIN:VCALENDAR
@@ -17,39 +19,38 @@ END:VCALENDAR
 ICS;
         $vcal = VObject\Reader::read($vcal);
         $this->assertFalse($validator->validate($vcal, ['name' => 'VFOO']));
-
     }
 
     /**
      * @param string $icalObject
-     * @param array $filters
-     * @param int $outcome
+     * @param array  $filters
+     * @param int    $outcome
      * @dataProvider provider
      */
-    function testValid($icalObject, $filters, $outcome) {
-
+    public function testValid($icalObject, $filters, $outcome)
+    {
         $validator = new CalendarQueryValidator();
 
         // Wrapping filter in a VCALENDAR component filter, as this is always
         // there anyway.
         $filters = [
-            'name'           => 'VCALENDAR',
-            'comp-filters'   => [$filters],
-            'prop-filters'   => [],
+            'name' => 'VCALENDAR',
+            'comp-filters' => [$filters],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $vObject = VObject\Reader::read($icalObject);
 
         switch ($outcome) {
-            case 0 :
+            case 0:
                 $this->assertFalse($validator->validate($vObject, $filters));
                 break;
-            case 1 :
+            case 1:
                 $this->assertTrue($validator->validate($vObject, $filters));
                 break;
-            case -1 :
+            case -1:
                 try {
                     $validator->validate($vObject, $filters);
                     $this->fail('This test was supposed to fail');
@@ -62,13 +63,11 @@ ICS;
                     $this->assertTrue(true);
                 }
                 break;
-
         }
-
     }
 
-    function provider() {
-
+    public function provider()
+    {
         $blob1 = <<<yow
 BEGIN:VCALENDAR
 BEGIN:VEVENT
@@ -194,7 +193,6 @@ END:VTODO
 END:VCALENDAR
 yow;
 
-
         $blob16 = <<<yow
 BEGIN:VCALENDAR
 BEGIN:VTODO
@@ -301,7 +299,6 @@ END:VEVENT
 END:VCALENDAR
 yow;
 
-
         $blob27 = <<<yow
 BEGIN:VCALENDAR
 BEGIN:VTODO
@@ -396,11 +393,11 @@ END:VCALENDAR
 yow;
 
         $filter1 = [
-            'name'           => 'VEVENT',
-            'comp-filters'   => [],
-            'prop-filters'   => [],
+            'name' => 'VEVENT',
+            'comp-filters' => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
         $filter2 = $filter1;
         $filter2['name'] = 'VTODO';
@@ -415,21 +412,21 @@ yow;
         $filter5 = $filter1;
         $filter5['comp-filters'] = [
             [
-                'name'           => 'VALARM',
+                'name' => 'VALARM',
                 'is-not-defined' => false,
-                'comp-filters'   => [],
-                'prop-filters'   => [],
-                'time-range'     => null,
+                'comp-filters' => [],
+                'prop-filters' => [],
+                'time-range' => null,
             ],
         ];
         $filter6 = $filter1;
         $filter6['prop-filters'] = [
             [
-                'name'           => 'SUMMARY',
+                'name' => 'SUMMARY',
                 'is-not-defined' => false,
-                'param-filters'  => [],
-                'time-range'     => null,
-                'text-match'     => null,
+                'param-filters' => [],
+                'time-range' => null,
+                'text-match' => null,
             ],
         ];
         $filter7 = $filter6;
@@ -448,13 +445,13 @@ yow;
         $filter11 = $filter1;
         $filter11['prop-filters'] = [
             [
-                'name'           => 'DTSTART',
+                'name' => 'DTSTART',
                 'is-not-defined' => false,
-                'param-filters'  => [
+                'param-filters' => [
                     [
-                        'name'           => 'VALUE',
+                        'name' => 'VALUE',
                         'is-not-defined' => false,
-                        'text-match'     => null,
+                        'text-match' => null,
                     ],
                 ],
                 'time-range' => null,
@@ -474,8 +471,8 @@ yow;
         // Param text filter
         $filter15 = $filter11;
         $filter15['prop-filters'][0]['param-filters'][0]['text-match'] = [
-            'collation'        => 'i;ascii-casemap',
-            'value'            => 'dAtE',
+            'collation' => 'i;ascii-casemap',
+            'value' => 'dAtE',
             'negate-condition' => false,
         ];
         $filter16 = $filter15;
@@ -492,13 +489,13 @@ yow;
         $filter19 = $filter5;
         $filter19['comp-filters'][0]['prop-filters'] = [
             [
-                'name'           => 'action',
+                'name' => 'action',
                 'is-not-defined' => false,
-                'time-range'     => null,
-                'param-filters'  => [],
-                'text-match'     => [
-                    'collation'        => 'i;ascii-casemap',
-                    'value'            => 'display',
+                'time-range' => null,
+                'param-filters' => [],
+                'text-match' => [
+                    'collation' => 'i;ascii-casemap',
+                    'value' => 'display',
                     'negate-condition' => false,
                 ],
             ],
@@ -506,13 +503,13 @@ yow;
 
         // Time range
         $filter20 = [
-            'name'           => 'VEVENT',
-            'comp-filters'   => [],
-            'prop-filters'   => [],
+            'name' => 'VEVENT',
+            'comp-filters' => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => [
+            'time-range' => [
                'start' => new \DateTime('2011-01-01 10:00:00', new \DateTimeZone('GMT')),
-               'end'   => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
+               'end' => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
             ],
         ];
         // Time range, no end date
@@ -527,102 +524,102 @@ yow;
         $filter23 = $filter20;
         $filter23['time-range'] = [
            'start' => new \DateTime('2011-02-01 10:00:00', new \DateTimeZone('GMT')),
-           'end'   => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
+           'end' => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
         ];
         // Time range
         $filter24 = [
-            'name'           => 'VTODO',
-            'comp-filters'   => [],
-            'prop-filters'   => [],
+            'name' => 'VTODO',
+            'comp-filters' => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => [
+            'time-range' => [
                'start' => new \DateTime('2011-01-01 12:45:00', new \DateTimeZone('GMT')),
-               'end'   => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
+               'end' => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
             ],
         ];
         // Time range, other dates (1 month in the future)
         $filter25 = $filter24;
         $filter25['time-range'] = [
            'start' => new \DateTime('2011-02-01 10:00:00', new \DateTimeZone('GMT')),
-           'end'   => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
+           'end' => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
         ];
         $filter26 = $filter24;
         $filter26['time-range'] = [
            'start' => new \DateTime('2011-01-01 11:45:00', new \DateTimeZone('GMT')),
-           'end'   => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
+           'end' => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
        ];
 
         // Time range for VJOURNAL
         $filter27 = [
-            'name'           => 'VJOURNAL',
-            'comp-filters'   => [],
-            'prop-filters'   => [],
+            'name' => 'VJOURNAL',
+            'comp-filters' => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => [
+            'time-range' => [
                'start' => new \DateTime('2011-01-01 12:45:00', new \DateTimeZone('GMT')),
-               'end'   => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
+               'end' => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
             ],
         ];
         $filter28 = $filter27;
         $filter28['time-range'] = [
            'start' => new \DateTime('2011-01-01 11:45:00', new \DateTimeZone('GMT')),
-           'end'   => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
+           'end' => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
         ];
         // Time range for VFREEBUSY
         $filter29 = [
-            'name'           => 'VFREEBUSY',
-            'comp-filters'   => [],
-            'prop-filters'   => [],
+            'name' => 'VFREEBUSY',
+            'comp-filters' => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => [
+            'time-range' => [
                'start' => new \DateTime('2011-01-01 12:45:00', new \DateTimeZone('GMT')),
-               'end'   => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
+               'end' => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
             ],
         ];
         // Time range filter on property
         $filter30 = [
-            'name'         => 'VEVENT',
+            'name' => 'VEVENT',
             'comp-filters' => [],
             'prop-filters' => [
                 [
-                    'name'           => 'DTSTART',
+                    'name' => 'DTSTART',
                     'is-not-defined' => false,
-                    'param-filters'  => [],
-                    'time-range'     => [
+                    'param-filters' => [],
+                    'time-range' => [
                        'start' => new \DateTime('2011-01-01 10:00:00', new \DateTimeZone('GMT')),
-                       'end'   => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
+                       'end' => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
                    ],
                     'text-match' => null,
                ],
             ],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         // Time range for alarm
         $filter31 = [
-            'name'         => 'VEVENT',
+            'name' => 'VEVENT',
             'prop-filters' => [],
             'comp-filters' => [
                 [
-                    'name'           => 'VALARM',
+                    'name' => 'VALARM',
                     'is-not-defined' => false,
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
-                    'time-range'     => [
+                    'comp-filters' => [],
+                    'prop-filters' => [],
+                    'time-range' => [
                        'start' => new \DateTime('2011-01-01 10:45:00', new \DateTimeZone('GMT')),
-                       'end'   => new \DateTime('2011-01-01 11:15:00', new \DateTimeZone('GMT')),
+                       'end' => new \DateTime('2011-01-01 11:15:00', new \DateTimeZone('GMT')),
                     ],
                     'text-match' => null,
                ],
             ],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
         $filter32 = $filter31;
         $filter32['comp-filters'][0]['time-range'] = [
            'start' => new \DateTime('2011-01-01 11:45:00', new \DateTimeZone('GMT')),
-           'end'   => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
+           'end' => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
        ];
 
         $filter33 = $filter31;
@@ -636,55 +633,54 @@ yow;
 
         // Time range filter on non-datetime property
         $filter37 = [
-            'name'         => 'VEVENT',
+            'name' => 'VEVENT',
             'comp-filters' => [],
             'prop-filters' => [
                 [
-                    'name'           => 'SUMMARY',
+                    'name' => 'SUMMARY',
                     'is-not-defined' => false,
-                    'param-filters'  => [],
-                    'time-range'     => [
+                    'param-filters' => [],
+                    'time-range' => [
                        'start' => new \DateTime('2011-01-01 10:00:00', new \DateTimeZone('GMT')),
-                       'end'   => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
+                       'end' => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
                    ],
                     'text-match' => null,
                ],
             ],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         $filter38 = [
-            'name'           => 'VEVENT',
-            'comp-filters'   => [],
-            'prop-filters'   => [],
+            'name' => 'VEVENT',
+            'comp-filters' => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => [
+            'time-range' => [
                 'start' => new \DateTime('2012-07-01 00:00:00', new \DateTimeZone('UTC')),
-                'end'   => new \DateTime('2012-08-01 00:00:00', new \DateTimeZone('UTC')),
-            ]
+                'end' => new \DateTime('2012-08-01 00:00:00', new \DateTimeZone('UTC')),
+            ],
         ];
         $filter39 = [
-            'name'         => 'VEVENT',
+            'name' => 'VEVENT',
             'comp-filters' => [
                 [
-                    'name'           => 'VALARM',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VALARM',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => new \DateTime('2012-09-01 00:00:00', new \DateTimeZone('UTC')),
-                        'end'   => new \DateTime('2012-10-01 00:00:00', new \DateTimeZone('UTC')),
-                    ]
+                        'end' => new \DateTime('2012-10-01 00:00:00', new \DateTimeZone('UTC')),
+                    ],
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
 
         return [
-
             // Component check
 
             [$blob1, $filter1, 1],
@@ -823,7 +819,5 @@ yow;
             // Event in timerange, but filtered alarm is in the far future (88).
             [$blob34, $filter39, 0],
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php
index df85b6ded..7d6414a80 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV\PropPatch;
 
 require_once 'Sabre/CalDAV/TestUtil.php';
 
-class CalendarTest extends \PHPUnit_Framework_TestCase {
-
+class CalendarTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var Sabre\CalDAV\Backend\PDO
      */
@@ -22,34 +24,30 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
      */
     protected $calendars;
 
-    function setup() {
-
+    public function setup()
+    {
         $this->backend = TestUtil::getBackend();
 
         $this->calendars = $this->backend->getCalendarsForUser('principals/user1');
         $this->assertEquals(2, count($this->calendars));
         $this->calendar = new Calendar($this->backend, $this->calendars[0]);
-
-
     }
 
-    function teardown() {
-
+    public function teardown()
+    {
         unset($this->backend);
-
     }
 
-    function testSimple() {
-
+    public function testSimple()
+    {
         $this->assertEquals($this->calendars[0]['uri'], $this->calendar->getName());
-
     }
 
     /**
      * @depends testSimple
      */
-    function testUpdateProperties() {
-
+    public function testUpdateProperties()
+    {
         $propPatch = new PropPatch([
             '{DAV:}displayname' => 'NewName',
         ]);
@@ -61,87 +59,80 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
         $calendars2 = $this->backend->getCalendarsForUser('principals/user1');
         $this->assertEquals('NewName', $calendars2[0]['{DAV:}displayname']);
-
     }
 
     /**
      * @depends testSimple
      */
-    function testGetProperties() {
-
+    public function testGetProperties()
+    {
         $question = [
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set',
         ];
 
         $result = $this->calendar->getProperties($question);
 
-        foreach ($question as $q) $this->assertArrayHasKey($q, $result);
+        foreach ($question as $q) {
+            $this->assertArrayHasKey($q, $result);
+        }
 
         $this->assertEquals(['VEVENT', 'VTODO'], $result['{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set']->getValue());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotFound
+     * @expectedException \Sabre\DAV\Exception\NotFound
      * @depends testSimple
      */
-    function testGetChildNotFound() {
-
+    public function testGetChildNotFound()
+    {
         $this->calendar->getChild('randomname');
-
     }
 
     /**
      * @depends testSimple
      */
-    function testGetChildren() {
-
+    public function testGetChildren()
+    {
         $children = $this->calendar->getChildren();
         $this->assertEquals(1, count($children));
 
         $this->assertTrue($children[0] instanceof CalendarObject);
-
     }
 
     /**
      * @depends testGetChildren
      */
-    function testChildExists() {
-
+    public function testChildExists()
+    {
         $this->assertFalse($this->calendar->childExists('foo'));
 
         $children = $this->calendar->getChildren();
         $this->assertTrue($this->calendar->childExists($children[0]->getName()));
     }
 
-
-
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\MethodNotAllowed
      */
-    function testCreateDirectory() {
-
+    public function testCreateDirectory()
+    {
         $this->calendar->createDirectory('hello');
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\MethodNotAllowed
      */
-    function testSetName() {
-
+    public function testSetName()
+    {
         $this->calendar->setName('hello');
-
     }
 
-    function testGetLastModified() {
-
+    public function testGetLastModified()
+    {
         $this->assertNull($this->calendar->getLastModified());
-
     }
 
-    function testCreateFile() {
-
+    public function testCreateFile()
+    {
         $file = fopen('php://memory', 'r+');
         fwrite($file, TestUtil::getTestCalendarData());
         rewind($file);
@@ -150,11 +141,10 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
         $file = $this->calendar->getChild('hello');
         $this->assertTrue($file instanceof CalendarObject);
-
     }
 
-    function testCreateFileNoSupportedComponents() {
-
+    public function testCreateFileNoSupportedComponents()
+    {
         $file = fopen('php://memory', 'r+');
         fwrite($file, TestUtil::getTestCalendarData());
         rewind($file);
@@ -164,31 +154,28 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
         $file = $calendar->getChild('hello');
         $this->assertTrue($file instanceof CalendarObject);
-
     }
 
-    function testDelete() {
-
+    public function testDelete()
+    {
         $this->calendar->delete();
 
         $calendars = $this->backend->getCalendarsForUser('principals/user1');
         $this->assertEquals(1, count($calendars));
     }
 
-    function testGetOwner() {
-
+    public function testGetOwner()
+    {
         $this->assertEquals('principals/user1', $this->calendar->getOwner());
-
     }
 
-    function testGetGroup() {
-
+    public function testGetGroup()
+    {
         $this->assertNull($this->calendar->getGroup());
-
     }
 
-    function testGetACL() {
-
+    public function testGetACL()
+    {
         $expected = [
             [
                 'privilege' => '{DAV:}read',
@@ -206,7 +193,7 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+                'privilege' => '{'.Plugin::NS_CALDAV.'}read-free-busy',
                 'principal' => '{DAV:}authenticated',
                 'protected' => true,
             ],
@@ -222,35 +209,29 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
             ],
         ];
         $this->assertEquals($expected, $this->calendar->getACL());
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetACL() {
-
+    public function testSetACL()
+    {
         $this->calendar->setACL([]);
-
     }
 
-    function testGetSyncToken() {
-
+    public function testGetSyncToken()
+    {
         $this->assertNull($this->calendar->getSyncToken());
-
     }
 
-    function testGetSyncTokenNoSyncSupport() {
-
+    public function testGetSyncTokenNoSyncSupport()
+    {
         $calendar = new Calendar(new Backend\Mock([], []), []);
         $this->assertNull($calendar->getSyncToken());
-
     }
 
-    function testGetChanges() {
-
+    public function testGetChanges()
+    {
         $this->assertNull($this->calendar->getChanges(1, 1));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDTest.php
index 9a3d47828..49252744d 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDTest.php
@@ -1,29 +1,31 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 use Sabre\VObject;
 
 /**
- * This unittests is created to find out why recurring events have wrong DTSTART value
+ * This unittests is created to find out why recurring events have wrong DTSTART value.
  *
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ExpandEventsDTSTARTandDTENDTest extends \Sabre\DAVServerTest {
-
+class ExpandEventsDTSTARTandDTENDTest extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -52,13 +54,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testExpand() {
-
+    public function testExpand()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -91,7 +93,7 @@ END:VCALENDAR
         try {
             $vObject = VObject\Reader::read($body);
         } catch (VObject\ParseException $e) {
-            $this->fail('Could not parse object. Error:' . $e->getMessage() . ' full object: ' . $response->getBodyAsString());
+            $this->fail('Could not parse object. Error:'.$e->getMessage().' full object: '.$response->getBodyAsString());
         }
 
         // check if DTSTARTs and DTENDs are correct
@@ -99,15 +101,14 @@ END:VCALENDAR
             /** @var $vevent Sabre\VObject\Component\VEvent */
             foreach ($vevent->children() as $child) {
                 /** @var $child Sabre\VObject\Property */
-                if ($child->name == 'DTSTART') {
+                if ('DTSTART' == $child->name) {
                     // DTSTART has to be one of three valid values
-                    $this->assertContains($child->getValue(), ['20120207T171500Z', '20120208T171500Z', '20120209T171500Z'], 'DTSTART is not a valid value: ' . $child->getValue());
-                } elseif ($child->name == 'DTEND') {
+                    $this->assertContains($child->getValue(), ['20120207T171500Z', '20120208T171500Z', '20120209T171500Z'], 'DTSTART is not a valid value: '.$child->getValue());
+                } elseif ('DTEND' == $child->name) {
                     // DTEND has to be one of three valid values
-                    $this->assertContains($child->getValue(), ['20120207T181500Z', '20120208T181500Z', '20120209T181500Z'], 'DTEND is not a valid value: ' . $child->getValue());
+                    $this->assertContains($child->getValue(), ['20120207T181500Z', '20120208T181500Z', '20120209T181500Z'], 'DTEND is not a valid value: '.$child->getValue());
                 }
             }
         }
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDbyDayTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDbyDayTest.php
index efc49673f..3a982fcfa 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDbyDayTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDTSTARTandDTENDbyDayTest.php
@@ -1,28 +1,30 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 use Sabre\VObject;
 
 /**
- * This unittests is created to find out why recurring events have wrong DTSTART value
+ * This unittests is created to find out why recurring events have wrong DTSTART value.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ExpandEventsDTSTARTandDTENDbyDayTest extends \Sabre\DAVServerTest {
-
+class ExpandEventsDTSTARTandDTENDbyDayTest extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -43,13 +45,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testExpandRecurringByDayEvent() {
-
+    public function testExpandRecurringByDayEvent()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -88,15 +90,14 @@ END:VCALENDAR
             /** @var $vevent Sabre\VObject\Component\VEvent */
             foreach ($vevent->children() as $child) {
                 /** @var $child Sabre\VObject\Property */
-                if ($child->name == 'DTSTART') {
+                if ('DTSTART' == $child->name) {
                     // DTSTART has to be one of two valid values
-                    $this->assertContains($child->getValue(), ['20120214T171500Z', '20120216T171500Z'], 'DTSTART is not a valid value: ' . $child->getValue());
-                } elseif ($child->name == 'DTEND') {
+                    $this->assertContains($child->getValue(), ['20120214T171500Z', '20120216T171500Z'], 'DTSTART is not a valid value: '.$child->getValue());
+                } elseif ('DTEND' == $child->name) {
                     // DTEND has to be one of two valid values
-                    $this->assertContains($child->getValue(), ['20120214T181500Z', '20120216T181500Z'], 'DTEND is not a valid value: ' . $child->getValue());
+                    $this->assertContains($child->getValue(), ['20120214T181500Z', '20120216T181500Z'], 'DTEND is not a valid value: '.$child->getValue());
                 }
             }
         }
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php
index 3a22e03d4..90897f1c5 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
@@ -15,17 +17,17 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ExpandEventsDoubleEventsTest extends \Sabre\DAVServerTest {
-
+class ExpandEventsDoubleEventsTest extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -54,13 +56,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testExpand() {
-
+    public function testExpand()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -93,11 +95,9 @@ END:VCALENDAR
         $vObject = VObject\Reader::read($body);
 
         // We only expect 3 events
-        $this->assertEquals(3, count($vObject->VEVENT), 'We got 6 events instead of 3. Output: ' . $body);
+        $this->assertEquals(3, count($vObject->VEVENT), 'We got 6 events instead of 3. Output: '.$body);
 
         // TZID should be gone
         $this->assertFalse(isset($vObject->VEVENT->DTSTART['TZID']));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php
index 7604c7f4c..3d4b36313 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php
@@ -1,15 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
 use Sabre\HTTP;
 
-require_once 'Sabre/CalDAV/Backend/Mock.php';
-require_once 'Sabre/HTTP/ResponseMock.php';
-
-class FreeBusyReportTest extends \PHPUnit_Framework_TestCase {
-
+class FreeBusyReportTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var Plugin
      */
@@ -19,8 +18,8 @@ class FreeBusyReportTest extends \PHPUnit_Framework_TestCase {
      */
     protected $server;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $obj1 = <<<ics
 BEGIN:VCALENDAR
 BEGIN:VEVENT
@@ -54,48 +53,44 @@ ics;
         $calendarData = [
             1 => [
                 'obj1' => [
-                    'calendarid'   => 1,
-                    'uri'          => 'event1.ics',
+                    'calendarid' => 1,
+                    'uri' => 'event1.ics',
                     'calendardata' => $obj1,
                 ],
                 'obj2' => [
-                    'calendarid'   => 1,
-                    'uri'          => 'event2.ics',
-                    'calendardata' => $obj2
+                    'calendarid' => 1,
+                    'uri' => 'event2.ics',
+                    'calendardata' => $obj2,
                 ],
                 'obj3' => [
-                    'calendarid'   => 1,
-                    'uri'          => 'event3.ics',
-                    'calendardata' => $obj3
-                ]
+                    'calendarid' => 1,
+                    'uri' => 'event3.ics',
+                    'calendardata' => $obj3,
+                ],
             ],
         ];
 
-
         $caldavBackend = new Backend\Mock([], $calendarData);
 
         $calendar = new Calendar($caldavBackend, [
-            'id'                                           => 1,
-            'uri'                                          => 'calendar',
-            'principaluri'                                 => 'principals/user1',
-            '{' . Plugin::NS_CALDAV . '}calendar-timezone' => "BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nTZID:Europe/Berlin\r\nEND:VTIMEZONE\r\nEND:VCALENDAR",
+            'id' => 1,
+            'uri' => 'calendar',
+            'principaluri' => 'principals/user1',
+            '{'.Plugin::NS_CALDAV.'}calendar-timezone' => "BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nTZID:Europe/Berlin\r\nEND:VTIMEZONE\r\nEND:VCALENDAR",
         ]);
 
         $this->server = new DAV\Server([$calendar]);
 
-        $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/calendar',
-        ]);
+        $request = new HTTP\Request('GET', '/calendar');
         $this->server->httpRequest = $request;
         $this->server->httpResponse = new HTTP\ResponseMock();
 
         $this->plugin = new Plugin();
         $this->server->addPlugin($this->plugin);
-
     }
 
-    function testFreeBusyReport() {
-
+    public function testFreeBusyReport()
+    {
         $reportXML = <<<XML
 <?xml version="1.0"?>
 <c:free-busy-query xmlns:c="urn:ietf:params:xml:ns:caldav">
@@ -108,17 +103,16 @@ XML;
 
         $this->assertEquals(200, $this->server->httpResponse->status);
         $this->assertEquals('text/calendar', $this->server->httpResponse->getHeader('Content-Type'));
-        $this->assertTrue(strpos($this->server->httpResponse->body, 'BEGIN:VFREEBUSY') !== false);
-        $this->assertTrue(strpos($this->server->httpResponse->body, '20111005T120000Z/20111005T130000Z') !== false);
-        $this->assertTrue(strpos($this->server->httpResponse->body, '20111006T100000Z/20111006T110000Z') !== false);
-
+        $this->assertTrue(false !== strpos($this->server->httpResponse->body, 'BEGIN:VFREEBUSY'));
+        $this->assertTrue(false !== strpos($this->server->httpResponse->body, '20111005T120000Z/20111005T130000Z'));
+        $this->assertTrue(false !== strpos($this->server->httpResponse->body, '20111006T100000Z/20111006T110000Z'));
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\BadRequest
+     * @expectedException \Sabre\DAV\Exception\BadRequest
      */
-    function testFreeBusyReportNoTimeRange() {
-
+    public function testFreeBusyReportNoTimeRange()
+    {
         $reportXML = <<<XML
 <?xml version="1.0"?>
 <c:free-busy-query xmlns:c="urn:ietf:params:xml:ns:caldav">
@@ -126,17 +120,14 @@ XML;
 XML;
 
         $report = $this->server->xml->parse($reportXML, null, $rootElem);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotImplemented
+     * @expectedException \Sabre\DAV\Exception\NotImplemented
      */
-    function testFreeBusyReportWrongNode() {
-
-        $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/',
-        ]);
+    public function testFreeBusyReportWrongNode()
+    {
+        $request = new HTTP\Request('REPORT', '/');
         $this->server->httpRequest = $request;
 
         $reportXML = <<<XML
@@ -148,15 +139,15 @@ XML;
 
         $report = $this->server->xml->parse($reportXML, null, $rootElem);
         $this->plugin->report($rootElem, $report, null);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testFreeBusyReportNoACLPlugin() {
-
+    public function testFreeBusyReportNoACLPlugin()
+    {
         $this->server = new DAV\Server();
+        $this->server->httpRequest = new HTTP\Request('REPORT', '/');
         $this->plugin = new Plugin();
         $this->server->addPlugin($this->plugin);
 
@@ -169,6 +160,5 @@ XML;
 
         $report = $this->server->xml->parse($reportXML, null, $rootElem);
         $this->plugin->report($rootElem, $report, null);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php
index 5fd8d29a1..6cb2b609e 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php
@@ -1,27 +1,29 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 
 /**
- * This unittest is created to check if queries for time-range include the start timestamp or not
+ * This unittest is created to check if queries for time-range include the start timestamp or not.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class GetEventsByTimerangeTest extends \Sabre\DAVServerTest {
-
+class GetEventsByTimerangeTest extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -45,14 +47,14 @@ END:VCALENDAR
         ],
     ];
 
-    function testQueryTimerange() {
-
+    public function testQueryTimerange()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/calendars/user1/calendar1',
             [
                 'Content-Type' => 'application/xml',
-                'Depth'        => '1',
+                'Depth' => '1',
             ]
         );
 
@@ -75,8 +77,6 @@ END:VCALENDAR
 
         $response = $this->request($request);
 
-        $this->assertTrue(strpos($response->body, 'BEGIN:VCALENDAR') !== false);
-
+        $this->assertTrue(false !== strpos($response->body, 'BEGIN:VCALENDAR'));
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php
index 75412577e..c139e5b5c 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
@@ -7,14 +9,14 @@ use Sabre\DAVACL;
 use Sabre\HTTP;
 use Sabre\VObject;
 
-class ICSExportPluginTest extends \Sabre\DAVServerTest {
-
+class ICSExportPluginTest extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $icsExportPlugin;
 
-    function setUp() {
-
+    public function setUp()
+    {
         parent::setUp();
         $this->icsExportPlugin = new ICSExportPlugin();
         $this->server->addPlugin(
@@ -25,7 +27,7 @@ class ICSExportPluginTest extends \Sabre\DAVServerTest {
             'principals/admin',
             'UUID-123467',
             [
-                '{DAV:}displayname'                         => 'Hello!',
+                '{DAV:}displayname' => 'Hello!',
                 '{http://apple.com/ns/ical/}calendar-color' => '#AA0000FF',
             ]
         );
@@ -56,23 +58,20 @@ END:VTODO
 END:VCALENDAR
 ICS
         );
-
-
     }
 
-    function testInit() {
-
+    public function testInit()
+    {
         $this->assertEquals(
             $this->icsExportPlugin,
             $this->server->getPlugin('ics-export')
         );
         $this->assertEquals($this->icsExportPlugin, $this->server->getPlugin('ics-export'));
         $this->assertEquals('ics-export', $this->icsExportPlugin->getPluginInfo()['name']);
-
     }
 
-    function testBeforeMethod() {
-
+    public function testBeforeMethod()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export'
@@ -89,15 +88,15 @@ ICS
         $this->assertEquals(1, count($obj->VERSION));
         $this->assertEquals(1, count($obj->CALSCALE));
         $this->assertEquals(1, count($obj->PRODID));
-        $this->assertTrue(strpos((string)$obj->PRODID, DAV\Version::VERSION) !== false);
+        $this->assertTrue(false !== strpos((string) $obj->PRODID, DAV\Version::VERSION));
         $this->assertEquals(1, count($obj->VTIMEZONE));
         $this->assertEquals(1, count($obj->VEVENT));
-        $this->assertEquals("Hello!", $obj->{"X-WR-CALNAME"});
-        $this->assertEquals("#AA0000FF", $obj->{"X-APPLE-CALENDAR-COLOR"});
-
+        $this->assertEquals('Hello!', $obj->{'X-WR-CALNAME'});
+        $this->assertEquals('#AA0000FF', $obj->{'X-APPLE-CALENDAR-COLOR'});
     }
-    function testBeforeMethodNoVersion() {
 
+    public function testBeforeMethodNoVersion()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export'
@@ -115,25 +114,23 @@ ICS
         $this->assertEquals(1, count($obj->VERSION));
         $this->assertEquals(1, count($obj->CALSCALE));
         $this->assertEquals(1, count($obj->PRODID));
-        $this->assertFalse(strpos((string)$obj->PRODID, DAV\Version::VERSION) !== false);
+        $this->assertFalse(false !== strpos((string) $obj->PRODID, DAV\Version::VERSION));
         $this->assertEquals(1, count($obj->VTIMEZONE));
         $this->assertEquals(1, count($obj->VEVENT));
-
     }
 
-    function testBeforeMethodNoExport() {
-
+    public function testBeforeMethodNoExport()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467'
         );
         $response = new HTTP\Response();
         $this->assertNull($this->icsExportPlugin->httpGet($request, $response));
-
     }
 
-    function testACLIntegrationBlocked() {
-
+    public function testACLIntegrationBlocked()
+    {
         $aclPlugin = new DAVACL\Plugin();
         $aclPlugin->allowUnauthenticatedAccess = false;
         $this->server->addPlugin(
@@ -146,11 +143,10 @@ ICS
         );
 
         $this->request($request, 403);
-
     }
 
-    function testACLIntegrationNotBlocked() {
-
+    public function testACLIntegrationNotBlocked()
+    {
         $aclPlugin = new DAVACL\Plugin();
         $aclPlugin->allowUnauthenticatedAccess = false;
         $this->server->addPlugin(
@@ -176,34 +172,31 @@ ICS
         $this->assertEquals(1, count($obj->VERSION));
         $this->assertEquals(1, count($obj->CALSCALE));
         $this->assertEquals(1, count($obj->PRODID));
-        $this->assertTrue(strpos((string)$obj->PRODID, DAV\Version::VERSION) !== false);
+        $this->assertTrue(false !== strpos((string) $obj->PRODID, DAV\Version::VERSION));
         $this->assertEquals(1, count($obj->VTIMEZONE));
         $this->assertEquals(1, count($obj->VEVENT));
-
     }
 
-    function testBadStartParam() {
-
+    public function testBadStartParam()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&start=foo'
         );
         $this->request($request, 400);
-
     }
 
-    function testBadEndParam() {
-
+    public function testBadEndParam()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&end=foo'
         );
         $this->request($request, 400);
-
     }
 
-    function testFilterStartEnd() {
-
+    public function testFilterStartEnd()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&start=1&end=2'
@@ -212,23 +205,21 @@ ICS
 
         $obj = VObject\Reader::read($response->getBody());
 
-        $this->assertEquals(0, count($obj->VTIMEZONE));
-        $this->assertEquals(0, count($obj->VEVENT));
-
+        $this->assertNull($obj->VTIMEZONE);
+        $this->assertNull($obj->VEVENT);
     }
 
-    function testExpandNoStart() {
-
+    public function testExpandNoStart()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&expand=1&end=2'
         );
         $this->request($request, 400);
-
     }
 
-    function testExpand() {
-
+    public function testExpand()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&start=1&end=2000000000&expand=1'
@@ -237,13 +228,12 @@ ICS
 
         $obj = VObject\Reader::read($response->getBody());
 
-        $this->assertEquals(0, count($obj->VTIMEZONE));
+        $this->assertNull($obj->VTIMEZONE);
         $this->assertEquals(1, count($obj->VEVENT));
-
     }
 
-    function testJCal() {
-
+    public function testJCal()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export',
@@ -252,11 +242,10 @@ ICS
 
         $response = $this->request($request, 200);
         $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
-
     }
 
-    function testJCalInUrl() {
-
+    public function testJCalInUrl()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&accept=jcal'
@@ -264,11 +253,10 @@ ICS
 
         $response = $this->request($request, 200);
         $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
-
     }
 
-    function testNegotiateDefault() {
-
+    public function testNegotiateDefault()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export',
@@ -277,11 +265,10 @@ ICS
 
         $response = $this->request($request, 200);
         $this->assertEquals('text/calendar', $response->getHeader('Content-Type'));
-
     }
 
-    function testFilterComponentVEVENT() {
-
+    public function testFilterComponentVEVENT()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&componentType=VEVENT'
@@ -292,12 +279,11 @@ ICS
         $obj = VObject\Reader::read($response->body);
         $this->assertEquals(1, count($obj->VTIMEZONE));
         $this->assertEquals(1, count($obj->VEVENT));
-        $this->assertEquals(0, count($obj->VTODO));
-
+        $this->assertNull($obj->VTODO);
     }
 
-    function testFilterComponentVTODO() {
-
+    public function testFilterComponentVTODO()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&componentType=VTODO'
@@ -307,25 +293,23 @@ ICS
 
         $obj = VObject\Reader::read($response->body);
 
-        $this->assertEquals(0, count($obj->VTIMEZONE));
-        $this->assertEquals(0, count($obj->VEVENT));
+        $this->assertNull($obj->VTIMEZONE);
+        $this->assertNull($obj->VEVENT);
         $this->assertEquals(1, count($obj->VTODO));
-
     }
 
-    function testFilterComponentBadComponent() {
-
+    public function testFilterComponentBadComponent()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export&componentType=VVOODOO'
         );
 
         $response = $this->request($request, 400);
-
     }
 
-    function testContentDisposition() {
-
+    public function testContentDisposition()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export'
@@ -334,14 +318,13 @@ ICS
         $response = $this->request($request, 200);
         $this->assertEquals('text/calendar', $response->getHeader('Content-Type'));
         $this->assertEquals(
-            'attachment; filename="UUID-123467-' . date('Y-m-d') . '.ics"',
+            'attachment; filename="UUID-123467-'.date('Y-m-d').'.ics"',
             $response->getHeader('Content-Disposition')
         );
-
     }
 
-    function testContentDispositionJson() {
-
+    public function testContentDispositionJson()
+    {
         $request = new HTTP\Request(
             'GET',
             '/calendars/admin/UUID-123467?export',
@@ -351,19 +334,18 @@ ICS
         $response = $this->request($request, 200);
         $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
         $this->assertEquals(
-            'attachment; filename="UUID-123467-' . date('Y-m-d') . '.json"',
+            'attachment; filename="UUID-123467-'.date('Y-m-d').'.json"',
             $response->getHeader('Content-Disposition')
         );
-
     }
 
-    function testContentDispositionBadChars() {
-
+    public function testContentDispositionBadChars()
+    {
         $this->caldavBackend->createCalendar(
             'principals/admin',
             'UUID-b_ad"(ch)ars',
             [
-                '{DAV:}displayname'                         => 'Test bad characters',
+                '{DAV:}displayname' => 'Test bad characters',
                 '{http://apple.com/ns/ical/}calendar-color' => '#AA0000FF',
             ]
         );
@@ -377,10 +359,8 @@ ICS
         $response = $this->request($request, 200);
         $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
         $this->assertEquals(
-            'attachment; filename="UUID-b_adchars-' . date('Y-m-d') . '.json"',
+            'attachment; filename="UUID-b_adchars-'.date('Y-m-d').'.json"',
             $response->getHeader('Content-Disposition')
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php
index a1a9b7c04..02d39fe84 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\VObject;
 
-class Issue166Test extends \PHPUnit_Framework_TestCase {
-
-    function testFlaw() {
-
+class Issue166Test extends \PHPUnit\Framework\TestCase
+{
+    public function testFlaw()
+    {
         $input = <<<HI
 BEGIN:VCALENDAR
 PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN
@@ -38,26 +40,24 @@ HI;
         $validator = new CalendarQueryValidator();
 
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => new \DateTime('2011-12-01'),
-                        'end'   => new \DateTime('2012-02-01'),
+                        'end' => new \DateTime('2012-02-01'),
                     ],
                 ],
             ],
-            'prop-filters'   => [],
+            'prop-filters' => [],
             'is-not-defined' => false,
-            'time-range'     => null,
+            'time-range' => null,
         ];
         $input = VObject\Reader::read($input);
         $this->assertTrue($validator->validate($input, $filters));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php
index e2b85c2bc..83120fe6a 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php
@@ -1,13 +1,16 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\VObject;
 
-class Issue172Test extends \PHPUnit_Framework_TestCase {
-
+class Issue172Test extends \PHPUnit\Framework\TestCase
+{
     // DateTimeZone() native name: America/Los_Angeles (GMT-8 in January)
-    function testBuiltInTimezoneName() {
+    public function testBuiltInTimezoneName()
+    {
         $input = <<<HI
 BEGIN:VCALENDAR
 VERSION:2.0
@@ -19,16 +22,16 @@ END:VCALENDAR
 HI;
         $validator = new CalendarQueryValidator();
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => new \DateTime('2012-01-18 21:00:00 GMT-08:00'),
-                        'end'   => new \DateTime('2012-01-18 21:00:00 GMT-08:00'),
+                        'end' => new \DateTime('2012-01-18 21:00:00 GMT-08:00'),
                     ],
                 ],
             ],
@@ -39,7 +42,8 @@ HI;
     }
 
     // Pacific Standard Time, translates to America/Los_Angeles (GMT-8 in January)
-    function testOutlookTimezoneName() {
+    public function testOutlookTimezoneName()
+    {
         $input = <<<HI
 BEGIN:VCALENDAR
 VERSION:2.0
@@ -66,16 +70,16 @@ END:VCALENDAR
 HI;
         $validator = new CalendarQueryValidator();
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
-                        'end'   => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
+                        'end' => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
                     ],
                 ],
             ],
@@ -86,7 +90,8 @@ HI;
     }
 
     // X-LIC-LOCATION, translates to America/Los_Angeles (GMT-8 in January)
-    function testLibICalLocationName() {
+    public function testLibICalLocationName()
+    {
         $input = <<<HI
 BEGIN:VCALENDAR
 VERSION:2.0
@@ -114,16 +119,16 @@ END:VCALENDAR
 HI;
         $validator = new CalendarQueryValidator();
         $filters = [
-            'name'         => 'VCALENDAR',
+            'name' => 'VCALENDAR',
             'comp-filters' => [
                 [
-                    'name'           => 'VEVENT',
-                    'comp-filters'   => [],
-                    'prop-filters'   => [],
+                    'name' => 'VEVENT',
+                    'comp-filters' => [],
+                    'prop-filters' => [],
                     'is-not-defined' => false,
-                    'time-range'     => [
+                    'time-range' => [
                         'start' => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
-                        'end'   => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
+                        'end' => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
                     ],
                 ],
             ],
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue203Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue203Test.php
index 369e9a70c..0700024cf 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue203Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue203Test.php
@@ -1,28 +1,30 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 use Sabre\VObject;
 
 /**
- * This unittest is created to find out why an overwritten DAILY event has wrong DTSTART, DTEND, SUMMARY and RECURRENCEID
+ * This unittest is created to find out why an overwritten DAILY event has wrong DTSTART, DTEND, SUMMARY and RECURRENCEID.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Issue203Test extends \Sabre\DAVServerTest {
-
+class Issue203Test extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -56,13 +58,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testIssue203() {
-
+    public function testIssue203()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -96,24 +98,22 @@ END:VCALENDAR
 
         $this->assertEquals(2, count($vObject->VEVENT));
 
-
         $expectedEvents = [
             [
                 'DTSTART' => '20120326T135200Z',
-                'DTEND'   => '20120326T145200Z',
+                'DTEND' => '20120326T145200Z',
                 'SUMMARY' => 'original summary',
             ],
             [
-                'DTSTART'       => '20120328T135200Z',
-                'DTEND'         => '20120328T145200Z',
-                'SUMMARY'       => 'overwritten summary',
+                'DTSTART' => '20120328T135200Z',
+                'DTEND' => '20120328T145200Z',
+                'SUMMARY' => 'overwritten summary',
                 'RECURRENCE-ID' => '20120327T135200Z',
-            ]
+            ],
         ];
 
         // try to match agains $expectedEvents array
         foreach ($expectedEvents as $expectedEvent) {
-
             $matching = false;
 
             foreach ($vObject->VEVENT as $vevent) {
@@ -131,7 +131,7 @@ END:VCALENDAR
                 break;
             }
 
-            $this->assertTrue($matching, 'Did not find the following event in the response: ' . var_export($expectedEvent, true));
+            $this->assertTrue($matching, 'Did not find the following event in the response: '.var_export($expectedEvent, true));
         }
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php
index ce40a90b0..60c944d1d 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php
@@ -1,28 +1,30 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 use Sabre\VObject;
 
 /**
- * This unittest is created to check if a VALARM TRIGGER of PT0S is supported
+ * This unittest is created to check if a VALARM TRIGGER of PT0S is supported.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Issue205Test extends \Sabre\DAVServerTest {
-
+class Issue205Test extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -49,13 +51,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testIssue205() {
-
+    public function testIssue205()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -79,8 +81,8 @@ END:VCALENDAR
 
         $response = $this->request($request);
 
-        $this->assertFalse(strpos($response->body, '<s:exception>Exception</s:exception>'), 'Exception occurred: ' . $response->body);
-        $this->assertFalse(strpos($response->body, 'Unknown or bad format'), 'DateTime unknown format Exception: ' . $response->body);
+        $this->assertFalse(strpos($response->body, '<s:exception>Exception</s:exception>'), 'Exception occurred: '.$response->body);
+        $this->assertFalse(strpos($response->body, 'Unknown or bad format'), 'DateTime unknown format Exception: '.$response->body);
 
         // Everts super awesome xml parser.
         $body = substr(
@@ -93,6 +95,5 @@ END:VCALENDAR
         $vObject = VObject\Reader::read($body);
 
         $this->assertEquals(1, count($vObject->VEVENT));
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php
index 950629fd8..10c9af50c 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php
@@ -1,27 +1,29 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 
 /**
- * This unittest is created to check for an endless loop in Sabre\CalDAV\CalendarQueryValidator
+ * This unittest is created to check for an endless loop in Sabre\CalDAV\CalendarQueryValidator.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Issue211Test extends \Sabre\DAVServerTest {
-
+class Issue211Test extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -53,13 +55,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testIssue211() {
-
+    public function testIssue211()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -84,6 +86,5 @@ END:VCALENDAR
         // if this assert is reached, the endless loop is gone
         // There should be no matching events
         $this->assertFalse(strpos('BEGIN:VEVENT', $response->body));
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php
index c3c0b5b48..46f5ca205 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php
@@ -1,27 +1,29 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 
 /**
- * This unittest is created to check for an endless loop in CalendarQueryValidator
+ * This unittest is created to check for an endless loop in CalendarQueryValidator.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Issue220Test extends \Sabre\DAVServerTest {
-
+class Issue220Test extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -63,13 +65,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testIssue220() {
-
+    public function testIssue220()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -91,8 +93,8 @@ END:VCALENDAR
 
         $response = $this->request($request);
 
-        $this->assertFalse(strpos($response->body, '<s:exception>PHPUnit_Framework_Error_Warning</s:exception>'), 'Error Warning occurred: ' . $response->body);
-        $this->assertFalse(strpos($response->body, 'Invalid argument supplied for foreach()'), 'Invalid argument supplied for foreach(): ' . $response->body);
+        $this->assertFalse(strpos($response->body, '<s:exception>PHPUnit_Framework_Error_Warning</s:exception>'), 'Error Warning occurred: '.$response->body);
+        $this->assertFalse(strpos($response->body, 'Invalid argument supplied for foreach()'), 'Invalid argument supplied for foreach(): '.$response->body);
 
         $this->assertEquals(207, $response->status);
     }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php
index d0783701d..a8b855ca3 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php
@@ -1,27 +1,29 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\HTTP;
 
 /**
- * This unittest is created to check if the time-range filter is working correctly with all-day-events
+ * This unittest is created to check if the time-range filter is working correctly with all-day-events.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Issue228Test extends \Sabre\DAVServerTest {
-
+class Issue228Test extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
 
     protected $caldavCalendars = [
         [
-            'id'           => 1,
-            'name'         => 'Calendar',
+            'id' => 1,
+            'name' => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri'          => 'calendar1',
-        ]
+            'uri' => 'calendar1',
+        ],
     ];
 
     protected $caldavCalendarObjects = [
@@ -43,13 +45,13 @@ END:VCALENDAR
         ],
     ];
 
-    function testIssue228() {
-
+    public function testIssue228()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'    => 'REPORT',
+            'REQUEST_METHOD' => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI'       => '/calendars/user1/calendar1',
-            'HTTP_DEPTH'        => '1',
+            'REQUEST_URI' => '/calendars/user1/calendar1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -74,6 +76,5 @@ END:VCALENDAR
 
         // We must check if absolutely nothing was returned from this query.
         $this->assertFalse(strpos($response->body, 'BEGIN:VCALENDAR'));
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php
index 6585f85c3..eceb0b87f 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php
@@ -1,58 +1,56 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Notifications;
 
 use Sabre\CalDAV;
 
-class CollectionTest extends \PHPUnit_Framework_TestCase {
-
+class CollectionTest extends \PHPUnit\Framework\TestCase
+{
     protected $caldavBackend;
     protected $principalUri;
     protected $notification;
 
-    function getInstance() {
-
+    public function getInstance()
+    {
         $this->principalUri = 'principals/user1';
 
         $this->notification = new CalDAV\Xml\Notification\SystemStatus(1, '"1"');
 
         $this->caldavBackend = new CalDAV\Backend\MockSharing([], [], [
             'principals/user1' => [
-                $this->notification
-            ]
+                $this->notification,
+            ],
         ]);
 
         return new Collection($this->caldavBackend, $this->principalUri);
-
     }
 
-    function testGetChildren() {
-
+    public function testGetChildren()
+    {
         $col = $this->getInstance();
         $this->assertEquals('notifications', $col->getName());
 
         $this->assertEquals([
-            new Node($this->caldavBackend, $this->principalUri, $this->notification)
+            new Node($this->caldavBackend, $this->principalUri, $this->notification),
         ], $col->getChildren());
-
     }
 
-    function testGetOwner() {
-
+    public function testGetOwner()
+    {
         $col = $this->getInstance();
         $this->assertEquals('principals/user1', $col->getOwner());
-
     }
 
-    function testGetGroup() {
-
+    public function testGetGroup()
+    {
         $col = $this->getInstance();
         $this->assertNull($col->getGroup());
-
     }
 
-    function testGetACL() {
-
+    public function testGetACL()
+    {
         $col = $this->getInstance();
         $expected = [
             [
@@ -63,23 +61,20 @@ class CollectionTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals($expected, $col->getACL());
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetACL() {
-
+    public function testSetACL()
+    {
         $col = $this->getInstance();
         $col->setACL([]);
-
     }
 
-    function testGetSupportedPrivilegeSet() {
-
+    public function testGetSupportedPrivilegeSet()
+    {
         $col = $this->getInstance();
         $this->assertNull($col->getSupportedPrivilegeSet());
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php
index 6c6e02da8..cb19ef962 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php
@@ -1,69 +1,66 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Notifications;
 
 use Sabre\CalDAV;
 
-class NodeTest extends \PHPUnit_Framework_TestCase {
-
+class NodeTest extends \PHPUnit\Framework\TestCase
+{
     protected $systemStatus;
     protected $caldavBackend;
 
-    function getInstance() {
-
+    public function getInstance()
+    {
         $principalUri = 'principals/user1';
 
         $this->systemStatus = new CalDAV\Xml\Notification\SystemStatus(1, '"1"');
 
         $this->caldavBackend = new CalDAV\Backend\MockSharing([], [], [
             'principals/user1' => [
-                $this->systemStatus
-            ]
+                $this->systemStatus,
+            ],
         ]);
 
         $node = new Node($this->caldavBackend, 'principals/user1', $this->systemStatus);
-        return $node;
 
+        return $node;
     }
 
-    function testGetId() {
-
+    public function testGetId()
+    {
         $node = $this->getInstance();
-        $this->assertEquals($this->systemStatus->getId() . '.xml', $node->getName());
-
+        $this->assertEquals($this->systemStatus->getId().'.xml', $node->getName());
     }
 
-    function testGetEtag() {
-
+    public function testGetEtag()
+    {
         $node = $this->getInstance();
         $this->assertEquals('"1"', $node->getETag());
-
     }
 
-    function testGetNotificationType() {
-
+    public function testGetNotificationType()
+    {
         $node = $this->getInstance();
         $this->assertEquals($this->systemStatus, $node->getNotificationType());
-
     }
 
-    function testDelete() {
-
+    public function testDelete()
+    {
         $node = $this->getInstance();
         $node->delete();
         $this->assertEquals([], $this->caldavBackend->getNotificationsForPrincipal('principals/user1'));
-
     }
 
-    function testGetGroup() {
-
+    public function testGetGroup()
+    {
         $node = $this->getInstance();
         $this->assertNull($node->getGroup());
-
     }
 
-    function testGetACL() {
-
+    public function testGetACL()
+    {
         $node = $this->getInstance();
         $expected = [
             [
@@ -74,23 +71,20 @@ class NodeTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals($expected, $node->getACL());
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetACL() {
-
+    public function testSetACL()
+    {
         $node = $this->getInstance();
         $node->setACL([]);
-
     }
 
-    function testGetSupportedPrivilegeSet() {
-
+    public function testGetSupportedPrivilegeSet()
+    {
         $node = $this->getInstance();
         $this->assertNull($node->getSupportedPrivilegeSet());
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php
index 859f6aa0c..711cc0ac7 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use DateTime;
@@ -8,8 +10,8 @@ use Sabre\DAV;
 use Sabre\DAVACL;
 use Sabre\HTTP;
 
-class PluginTest extends \PHPUnit_Framework_TestCase {
-
+class PluginTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var DAV\Server
      */
@@ -24,37 +26,37 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
      */
     protected $caldavBackend;
 
-    function setup() {
-
+    public function setup()
+    {
         $caldavNS = '{urn:ietf:params:xml:ns:caldav}';
 
         $this->caldavBackend = new Backend\Mock([
             [
-                'id'                                           => 1,
-                'uri'                                          => 'UUID-123467',
-                'principaluri'                                 => 'principals/user1',
-                '{DAV:}displayname'                            => 'user1 calendar',
-                $caldavNS . 'calendar-description'             => 'Calendar description',
-                '{http://apple.com/ns/ical/}calendar-order'    => '1',
-                '{http://apple.com/ns/ical/}calendar-color'    => '#FF0000',
-                $caldavNS . 'supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO']),
+                'id' => 1,
+                'uri' => 'UUID-123467',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'user1 calendar',
+                $caldavNS.'calendar-description' => 'Calendar description',
+                '{http://apple.com/ns/ical/}calendar-order' => '1',
+                '{http://apple.com/ns/ical/}calendar-color' => '#FF0000',
+                $caldavNS.'supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO']),
             ],
             [
-                'id'                                           => 2,
-                'uri'                                          => 'UUID-123468',
-                'principaluri'                                 => 'principals/user1',
-                '{DAV:}displayname'                            => 'user1 calendar2',
-                $caldavNS . 'calendar-description'             => 'Calendar description',
-                '{http://apple.com/ns/ical/}calendar-order'    => '1',
-                '{http://apple.com/ns/ical/}calendar-color'    => '#FF0000',
-                $caldavNS . 'supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO']),
-            ]
+                'id' => 2,
+                'uri' => 'UUID-123468',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'user1 calendar2',
+                $caldavNS.'calendar-description' => 'Calendar description',
+                '{http://apple.com/ns/ical/}calendar-order' => '1',
+                '{http://apple.com/ns/ical/}calendar-color' => '#FF0000',
+                $caldavNS.'supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO']),
+            ],
         ], [
             1 => [
                 'UUID-2345' => [
                     'calendardata' => TestUtil::getTestCalendarData(),
-                ]
-            ]
+                ],
+            ],
         ]);
         $principalBackend = new DAVACL\PrincipalBackend\Mock();
         $principalBackend->setGroupMemberSet('principals/admin/calendar-proxy-read', ['principals/user1']);
@@ -89,41 +91,45 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $authBackend = new DAV\Auth\Backend\Mock();
         $authBackend->setPrincipal('principals/user1');
         $authPlugin = new DAV\Auth\Plugin($authBackend);
-        $authPlugin->beforeMethod(new \Sabre\HTTP\Request(), new \Sabre\HTTP\Response());
+        $authPlugin->beforeMethod(new \Sabre\HTTP\Request('GET', '/'), new \Sabre\HTTP\Response());
         $this->server->addPlugin($authPlugin);
 
         // This forces a login
-        $authPlugin->beforeMethod(new HTTP\Request(), new HTTP\Response());
+        $authPlugin->beforeMethod(new HTTP\Request('GET', '/'), new HTTP\Response());
 
         $this->response = new HTTP\ResponseMock();
         $this->server->httpResponse = $this->response;
-
     }
 
-    function testSimple() {
-
+    public function testSimple()
+    {
         $this->assertEquals(['MKCALENDAR'], $this->plugin->getHTTPMethods('calendars/user1/randomnewcalendar'));
         $this->assertEquals(['calendar-access', 'calendar-proxy'], $this->plugin->getFeatures());
         $this->assertEquals(
             'caldav',
             $this->plugin->getPluginInfo()['name']
         );
-
     }
 
-    function testUnknownMethodPassThrough() {
-
+    public function testUnknownMethodPassThrough()
+    {
         $request = new HTTP\Request('MKBREAKFAST', '/');
 
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(501, $this->response->status, 'Incorrect status returned. Full response body:' . $this->response->body);
-
+        $this->assertEquals(501, $this->response->status, 'Incorrect status returned. Full response body:'.$this->response->body);
     }
 
-    function testReportPassThrough() {
+    public function testGetWithoutContentType()
+    {
+        $request = new HTTP\Request('GET', '/');
+        $this->plugin->httpAfterGet($request, $this->response);
+        $this->assertTrue(true);
+    }
 
+    public function testReportPassThrough()
+    {
         $request = new HTTP\Request('REPORT', '/', ['Content-Type' => 'application/xml']);
         $request->setBody('<?xml version="1.0"?><s:somereport xmlns:s="http://www.rooftopsolutions.nl/NS/example" />');
 
@@ -131,11 +137,10 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $this->server->exec();
 
         $this->assertEquals(415, $this->response->status);
-
     }
 
-    function testMkCalendarBadLocation() {
-
+    public function testMkCalendarBadLocation()
+    {
         $request = new HTTP\Request('MKCALENDAR', '/blabla');
 
         $body = '<?xml version="1.0" encoding="utf-8" ?>
@@ -181,11 +186,10 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $this->server->exec();
 
         $this->assertEquals(403, $this->response->status);
-
     }
 
-    function testMkCalendarNoParentNode() {
-
+    public function testMkCalendarNoParentNode()
+    {
         $request = new HTTP\Request('MKCALENDAR', '/doesntexist/calendar');
 
         $body = '<?xml version="1.0" encoding="utf-8" ?>
@@ -231,14 +235,13 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $this->server->exec();
 
         $this->assertEquals(409, $this->response->status);
-
     }
 
-    function testMkCalendarExistingCalendar() {
-
+    public function testMkCalendarExistingCalendar()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'MKCALENDAR',
-            'REQUEST_URI'    => '/calendars/user1/UUID-123467',
+            'REQUEST_URI' => '/calendars/user1/UUID-123467',
         ]);
 
         $body = '<?xml version="1.0" encoding="utf-8" ?>
@@ -284,11 +287,10 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $this->server->exec();
 
         $this->assertEquals(405, $this->response->status);
-
     }
 
-    function testMkCalendarSucceed() {
-
+    public function testMkCalendarSucceed()
+    {
         $request = new HTTP\Request('MKCALENDAR', '/calendars/user1/NEWCALENDAR');
 
         $timezone = 'BEGIN:VCALENDAR
@@ -325,7 +327,7 @@ END:VCALENDAR';
          <C:supported-calendar-component-set>
            <C:comp name="VEVENT"/>
          </C:supported-calendar-component-set>
-         <C:calendar-timezone><![CDATA[' . $timezone . ']]></C:calendar-timezone>
+         <C:calendar-timezone><![CDATA['.$timezone.']]></C:calendar-timezone>
        </D:prop>
      </D:set>
    </C:mkcalendar>';
@@ -334,89 +336,87 @@ END:VCALENDAR';
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(201, $this->response->status, 'Invalid response code received. Full response body: ' . $this->response->body);
+        $this->assertEquals(201, $this->response->status, 'Invalid response code received. Full response body: '.$this->response->body);
 
         $calendars = $this->caldavBackend->getCalendarsForUser('principals/user1');
         $this->assertEquals(3, count($calendars));
 
         $newCalendar = null;
         foreach ($calendars as $calendar) {
-           if ($calendar['uri'] === 'NEWCALENDAR') {
+            if ('NEWCALENDAR' === $calendar['uri']) {
                 $newCalendar = $calendar;
                 break;
-           }
+            }
         }
 
         $this->assertInternalType('array', $newCalendar);
 
         $keys = [
-            'uri'                                                             => 'NEWCALENDAR',
-            'id'                                                              => null,
-            '{urn:ietf:params:xml:ns:caldav}calendar-description'             => 'Calendar restricted to events.',
-            '{urn:ietf:params:xml:ns:caldav}calendar-timezone'                => $timezone,
-            '{DAV:}displayname'                                               => 'Lisa\'s Events',
+            'uri' => 'NEWCALENDAR',
+            'id' => null,
+            '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'Calendar restricted to events.',
+            '{urn:ietf:params:xml:ns:caldav}calendar-timezone' => $timezone,
+            '{DAV:}displayname' => 'Lisa\'s Events',
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => null,
         ];
 
         foreach ($keys as $key => $value) {
-
             $this->assertArrayHasKey($key, $newCalendar);
 
-            if (is_null($value)) continue;
+            if (is_null($value)) {
+                continue;
+            }
             $this->assertEquals($value, $newCalendar[$key]);
-
         }
         $sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
         $this->assertTrue($newCalendar[$sccs] instanceof Xml\Property\SupportedCalendarComponentSet);
         $this->assertEquals(['VEVENT'], $newCalendar[$sccs]->getValue());
-
     }
 
-    function testMkCalendarEmptyBodySucceed() {
-
+    public function testMkCalendarEmptyBodySucceed()
+    {
         $request = new HTTP\Request('MKCALENDAR', '/calendars/user1/NEWCALENDAR');
 
         $request->setBody('');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(201, $this->response->status, 'Invalid response code received. Full response body: ' . $this->response->body);
+        $this->assertEquals(201, $this->response->status, 'Invalid response code received. Full response body: '.$this->response->body);
 
         $calendars = $this->caldavBackend->getCalendarsForUser('principals/user1');
         $this->assertEquals(3, count($calendars));
 
         $newCalendar = null;
         foreach ($calendars as $calendar) {
-           if ($calendar['uri'] === 'NEWCALENDAR') {
+            if ('NEWCALENDAR' === $calendar['uri']) {
                 $newCalendar = $calendar;
                 break;
-           }
+            }
         }
 
         $this->assertInternalType('array', $newCalendar);
 
         $keys = [
-            'uri'                                                             => 'NEWCALENDAR',
-            'id'                                                              => null,
+            'uri' => 'NEWCALENDAR',
+            'id' => null,
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => null,
         ];
 
         foreach ($keys as $key => $value) {
-
             $this->assertArrayHasKey($key, $newCalendar);
 
-            if (is_null($value)) continue;
+            if (is_null($value)) {
+                continue;
+            }
             $this->assertEquals($value, $newCalendar[$key]);
-
         }
         $sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
         $this->assertTrue($newCalendar[$sccs] instanceof Xml\Property\SupportedCalendarComponentSet);
         $this->assertEquals(['VEVENT', 'VTODO'], $newCalendar[$sccs]->getValue());
-
     }
 
-    function testMkCalendarBadXml() {
-
+    public function testMkCalendarBadXml()
+    {
         $request = new HTTP\Request('MKCALENDAR', '/blabla');
         $body = 'This is not xml';
 
@@ -425,26 +425,24 @@ END:VCALENDAR';
         $this->server->exec();
 
         $this->assertEquals(400, $this->response->status);
-
     }
 
-    function testPrincipalProperties() {
-
+    public function testPrincipalProperties()
+    {
         $httpRequest = new HTTP\Request('FOO', '/blabla', ['Host' => 'sabredav.org']);
         $this->server->httpRequest = $httpRequest;
 
         $props = $this->server->getPropertiesForPath('/principals/user1', [
-            '{' . Plugin::NS_CALDAV . '}calendar-home-set',
-            '{' . Plugin::NS_CALENDARSERVER . '}calendar-proxy-read-for',
-            '{' . Plugin::NS_CALENDARSERVER . '}calendar-proxy-write-for',
-            '{' . Plugin::NS_CALENDARSERVER . '}notification-URL',
-            '{' . Plugin::NS_CALENDARSERVER . '}email-address-set',
+            '{'.Plugin::NS_CALDAV.'}calendar-home-set',
+            '{'.Plugin::NS_CALENDARSERVER.'}calendar-proxy-read-for',
+            '{'.Plugin::NS_CALENDARSERVER.'}calendar-proxy-write-for',
+            '{'.Plugin::NS_CALENDARSERVER.'}notification-URL',
+            '{'.Plugin::NS_CALENDARSERVER.'}email-address-set',
         ]);
 
         $this->assertArrayHasKey(0, $props);
         $this->assertArrayHasKey(200, $props[0]);
 
-
         $this->assertArrayHasKey('{urn:ietf:params:xml:ns:caldav}calendar-home-set', $props[0][200]);
         $prop = $props[0][200]['{urn:ietf:params:xml:ns:caldav}calendar-home-set'];
         $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $prop);
@@ -460,15 +458,14 @@ END:VCALENDAR';
         $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $prop);
         $this->assertEquals(['principals/admin/'], $prop->getHrefs());
 
-        $this->assertArrayHasKey('{' . Plugin::NS_CALENDARSERVER . '}email-address-set', $props[0][200]);
-        $prop = $props[0][200]['{' . Plugin::NS_CALENDARSERVER . '}email-address-set'];
+        $this->assertArrayHasKey('{'.Plugin::NS_CALENDARSERVER.'}email-address-set', $props[0][200]);
+        $prop = $props[0][200]['{'.Plugin::NS_CALENDARSERVER.'}email-address-set'];
         $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\EmailAddressSet', $prop);
         $this->assertEquals(['user1.sabredav@sabredav.org'], $prop->getValue());
-
     }
 
-    function testSupportedReportSetPropertyNonCalendar() {
-
+    public function testSupportedReportSetPropertyNonCalendar()
+    {
         $props = $this->server->getPropertiesForPath('/calendars/user1', [
             '{DAV:}supported-report-set',
         ]);
@@ -487,14 +484,13 @@ END:VCALENDAR';
             '{DAV:}principal-search-property-set',
         ];
         $this->assertEquals($value, $prop->getValue());
-
     }
 
     /**
      * @depends testSupportedReportSetPropertyNonCalendar
      */
-    function testSupportedReportSetProperty() {
-
+    public function testSupportedReportSetProperty()
+    {
         $props = $this->server->getPropertiesForPath('/calendars/user1/UUID-123467', [
             '{DAV:}supported-report-set',
         ]);
@@ -513,14 +509,13 @@ END:VCALENDAR';
             '{DAV:}expand-property',
             '{DAV:}principal-match',
             '{DAV:}principal-property-search',
-            '{DAV:}principal-search-property-set'
+            '{DAV:}principal-search-property-set',
         ];
         $this->assertEquals($value, $prop->getValue());
-
     }
 
-    function testSupportedReportSetUserCalendars() {
-
+    public function testSupportedReportSetUserCalendars()
+    {
         $this->server->addPlugin(new \Sabre\DAV\Sync\Plugin());
 
         $props = $this->server->getPropertiesForPath('/calendars/user1', [
@@ -542,22 +537,21 @@ END:VCALENDAR';
             '{DAV:}principal-search-property-set',
         ];
         $this->assertEquals($value, $prop->getValue());
-
     }
 
     /**
      * @depends testSupportedReportSetProperty
      */
-    function testCalendarMultiGetReport() {
-
+    public function testCalendarMultiGetReport()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data />' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data />'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>'.
             '</c:calendar-multiget>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1', ['Depth' => '1']);
@@ -587,24 +581,23 @@ END:VCALENDAR';
 XML;
 
         $this->assertXmlStringEqualsXmlString($expected, $this->response->getBodyAsString());
-
     }
 
     /**
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarMultiGetReportExpand() {
-
+    public function testCalendarMultiGetReportExpand()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand start="20110101T000000Z" end="20111231T235959Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand start="20110101T000000Z" end="20111231T235959Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>'.
             '</c:calendar-multiget>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1', ['Depth' => '1']);
@@ -613,7 +606,7 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Invalid HTTP status received. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Invalid HTTP status received. Full response body: '.$this->response->body);
 
         $expectedIcal = TestUtil::getTestCalendarData();
         $expectedIcal = \Sabre\VObject\Reader::read($expectedIcal);
@@ -640,29 +633,28 @@ XML;
 XML;
 
         $this->assertXmlStringEqualsXmlString($expected, $this->response->getBodyAsString());
-
     }
 
     /**
      * @depends testSupportedReportSetProperty
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarQueryReport() {
-
+    public function testCalendarQueryReport()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<c:filter>' .
-            '  <c:comp-filter name="VCALENDAR">' .
-            '    <c:comp-filter name="VEVENT" />' .
-            '  </c:comp-filter>' .
-            '</c:filter>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<c:filter>'.
+            '  <c:comp-filter name="VCALENDAR">'.
+            '    <c:comp-filter name="VEVENT" />'.
+            '  </c:comp-filter>'.
+            '</c:filter>'.
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467', ['Depth' => '1']);
@@ -671,7 +663,7 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: '.$this->response->body);
 
         $expectedIcal = TestUtil::getTestCalendarData();
         $expectedIcal = \Sabre\VObject\Reader::read($expectedIcal);
@@ -698,33 +690,32 @@ XML;
 XML;
 
         $this->assertXmlStringEqualsXmlString($expected, $this->response->getBodyAsString());
-
     }
 
     /**
      * @depends testSupportedReportSetProperty
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarQueryReportWindowsPhone() {
-
+    public function testCalendarQueryReportWindowsPhone()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<c:filter>' .
-            '  <c:comp-filter name="VCALENDAR">' .
-            '    <c:comp-filter name="VEVENT" />' .
-            '  </c:comp-filter>' .
-            '</c:filter>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<c:filter>'.
+            '  <c:comp-filter name="VCALENDAR">'.
+            '    <c:comp-filter name="VEVENT" />'.
+            '  </c:comp-filter>'.
+            '</c:filter>'.
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467', [
-            'Depth'      => '0',
+            'Depth' => '0',
             'User-Agent' => 'MSFT-WP/8.10.14219 (gzip)',
         ]);
 
@@ -733,7 +724,7 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: '.$this->response->body);
 
         $expectedIcal = TestUtil::getTestCalendarData();
         $expectedIcal = \Sabre\VObject\Reader::read($expectedIcal);
@@ -760,29 +751,28 @@ XML;
 XML;
 
         $this->assertXmlStringEqualsXmlString($expected, $this->response->getBodyAsString());
-
     }
 
     /**
      * @depends testSupportedReportSetProperty
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarQueryReportBadDepth() {
-
+    public function testCalendarQueryReportBadDepth()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<c:filter>' .
-            '  <c:comp-filter name="VCALENDAR">' .
-            '    <c:comp-filter name="VEVENT" />' .
-            '  </c:comp-filter>' .
-            '</c:filter>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<c:filter>'.
+            '  <c:comp-filter name="VCALENDAR">'.
+            '    <c:comp-filter name="VEVENT" />'.
+            '  </c:comp-filter>'.
+            '</c:filter>'.
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467', [
@@ -793,26 +783,25 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(400, $this->response->status, 'Received an unexpected status. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(400, $this->response->status, 'Received an unexpected status. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testCalendarQueryReport
      */
-    function testCalendarQueryReportNoCalData() {
-
+    public function testCalendarQueryReportNoCalData()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<c:filter>' .
-            '  <c:comp-filter name="VCALENDAR">' .
-            '    <c:comp-filter name="VEVENT" />' .
-            '  </c:comp-filter>' .
-            '</c:filter>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<c:filter>'.
+            '  <c:comp-filter name="VCALENDAR">'.
+            '    <c:comp-filter name="VEVENT" />'.
+            '  </c:comp-filter>'.
+            '</c:filter>'.
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467', [
@@ -823,7 +812,7 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: '.$this->response->body);
 
         $expected = <<<XML
 <?xml version="1.0"?>
@@ -841,21 +830,20 @@ XML;
 XML;
 
         $this->assertXmlStringEqualsXmlString($expected, $this->response->getBodyAsString());
-
     }
 
     /**
      * @depends testCalendarQueryReport
      */
-    function testCalendarQueryReportNoFilters() {
-
+    public function testCalendarQueryReportNoFilters()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data />' .
-            '  <d:getetag />' .
-            '</d:prop>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data />'.
+            '  <d:getetag />'.
+            '</d:prop>'.
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467');
@@ -864,30 +852,29 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(400, $this->response->status, 'Received an unexpected status. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(400, $this->response->status, 'Received an unexpected status. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testSupportedReportSetProperty
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarQueryReport1Object() {
-
+    public function testCalendarQueryReport1Object()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<c:filter>' .
-            '  <c:comp-filter name="VCALENDAR">' .
-            '    <c:comp-filter name="VEVENT" />' .
-            '  </c:comp-filter>' .
-            '</c:filter>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand start="20000101T000000Z" end="20101231T235959Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<c:filter>'.
+            '  <c:comp-filter name="VCALENDAR">'.
+            '    <c:comp-filter name="VEVENT" />'.
+            '  </c:comp-filter>'.
+            '</c:filter>'.
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467/UUID-2345', ['Depth' => '0']);
@@ -896,7 +883,7 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: '.$this->response->body);
 
         $expectedIcal = TestUtil::getTestCalendarData();
         $expectedIcal = \Sabre\VObject\Reader::read($expectedIcal);
@@ -923,26 +910,25 @@ XML;
 XML;
 
         $this->assertXmlStringEqualsXmlString($expected, $this->response->getBodyAsString());
-
     }
 
     /**
      * @depends testSupportedReportSetProperty
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarQueryReport1ObjectNoCalData() {
-
+    public function testCalendarQueryReport1ObjectNoCalData()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<c:filter>' .
-            '  <c:comp-filter name="VCALENDAR">' .
-            '    <c:comp-filter name="VEVENT" />' .
-            '  </c:comp-filter>' .
-            '</c:filter>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-query xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<c:filter>'.
+            '  <c:comp-filter name="VCALENDAR">'.
+            '    <c:comp-filter name="VEVENT" />'.
+            '  </c:comp-filter>'.
+            '</c:filter>'.
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467/UUID-2345', ['Depth' => '0']);
@@ -951,7 +937,7 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Received an unexpected status. Full response body: '.$this->response->body);
 
         $expected = <<<XML
 <?xml version="1.0"?>
@@ -969,34 +955,32 @@ XML;
 XML;
 
         $this->assertXmlStringEqualsXmlString($expected, $this->response->getBodyAsString());
-
     }
 
-    function testHTMLActionsPanel() {
-
+    public function testHTMLActionsPanel()
+    {
         $output = '';
         $r = $this->server->emit('onHTMLActionsPanel', [$this->server->tree->getNodeForPath('calendars/user1'), &$output]);
         $this->assertFalse($r);
 
-        $this->assertTrue(!!strpos($output, 'Display name'));
-
+        $this->assertTrue((bool) strpos($output, 'Display name'));
     }
 
     /**
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarMultiGetReportNoEnd() {
-
+    public function testCalendarMultiGetReportNoEnd()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand start="20110101T000000Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand start="20110101T000000Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>'.
             '</c:calendar-multiget>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1', ['Depth' => '1']);
@@ -1005,25 +989,24 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(400, $this->response->status, 'Invalid HTTP status received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(400, $this->response->status, 'Invalid HTTP status received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarMultiGetReportNoStart() {
-
+    public function testCalendarMultiGetReportNoStart()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand end="20110101T000000Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand end="20110101T000000Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>'.
             '</c:calendar-multiget>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1', ['Depth' => '1']);
@@ -1032,25 +1015,24 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(400, $this->response->status, 'Invalid HTTP status received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(400, $this->response->status, 'Invalid HTTP status received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testCalendarMultiGetReport
      */
-    function testCalendarMultiGetReportEndBeforeStart() {
-
+    public function testCalendarMultiGetReportEndBeforeStart()
+    {
         $body =
-            '<?xml version="1.0"?>' .
-            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">' .
-            '<d:prop>' .
-            '  <c:calendar-data>' .
-            '     <c:expand start="20200101T000000Z" end="20110101T000000Z" />' .
-            '  </c:calendar-data>' .
-            '  <d:getetag />' .
-            '</d:prop>' .
-            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>' .
+            '<?xml version="1.0"?>'.
+            '<c:calendar-multiget xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:d="DAV:">'.
+            '<d:prop>'.
+            '  <c:calendar-data>'.
+            '     <c:expand start="20200101T000000Z" end="20110101T000000Z" />'.
+            '  </c:calendar-data>'.
+            '  <d:getetag />'.
+            '</d:prop>'.
+            '<d:href>/calendars/user1/UUID-123467/UUID-2345</d:href>'.
             '</c:calendar-multiget>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1', ['Depth' => '1']);
@@ -1059,28 +1041,25 @@ XML;
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(400, $this->response->status, 'Invalid HTTP status received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(400, $this->response->status, 'Invalid HTTP status received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testSupportedReportSetPropertyNonCalendar
      */
-    function testCalendarProperties() {
-
+    public function testCalendarProperties()
+    {
         $ns = '{urn:ietf:params:xml:ns:caldav}';
         $props = $this->server->getProperties('calendars/user1/UUID-123467', [
-            $ns . 'max-resource-size',
-            $ns . 'supported-calendar-data',
-            $ns . 'supported-collation-set',
+            $ns.'max-resource-size',
+            $ns.'supported-calendar-data',
+            $ns.'supported-collation-set',
         ]);
 
         $this->assertEquals([
-            $ns . 'max-resource-size'       => 10000000,
-            $ns . 'supported-calendar-data' => new Xml\Property\SupportedCalendarData(),
-            $ns . 'supported-collation-set' => new Xml\Property\SupportedCollationSet(),
+            $ns.'max-resource-size' => 10000000,
+            $ns.'supported-calendar-data' => new Xml\Property\SupportedCalendarData(),
+            $ns.'supported-collation-set' => new Xml\Property\SupportedCollationSet(),
         ], $props);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php
index 23c248825..277de0664 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php
@@ -1,20 +1,20 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAVACL;
 
-class CollectionTest extends \PHPUnit_Framework_TestCase {
-
-    function testGetChildForPrincipal() {
-
+class CollectionTest extends \PHPUnit\Framework\TestCase
+{
+    public function testGetChildForPrincipal()
+    {
         $back = new DAVACL\PrincipalBackend\Mock();
         $col = new Collection($back);
         $r = $col->getChildForPrincipal([
             'uri' => 'principals/admin',
         ]);
         $this->assertInstanceOf('Sabre\\CalDAV\\Principal\\User', $r);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php
index fe07f0131..8036635b2 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php
@@ -1,102 +1,95 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAVACL;
 
-class ProxyReadTest extends \PHPUnit_Framework_TestCase {
-
+class ProxyReadTest extends \PHPUnit\Framework\TestCase
+{
     protected $backend;
 
-    function getInstance() {
-
+    public function getInstance()
+    {
         $backend = new DAVACL\PrincipalBackend\Mock();
         $principal = new ProxyRead($backend, [
             'uri' => 'principal/user',
         ]);
         $this->backend = $backend;
-        return $principal;
 
-   }
-
-    function testGetName() {
+        return $principal;
+    }
 
+    public function testGetName()
+    {
         $i = $this->getInstance();
         $this->assertEquals('calendar-proxy-read', $i->getName());
-
     }
-    function testGetDisplayName() {
 
+    public function testGetDisplayName()
+    {
         $i = $this->getInstance();
         $this->assertEquals('calendar-proxy-read', $i->getDisplayName());
-
     }
 
-    function testGetLastModified() {
-
+    public function testGetLastModified()
+    {
         $i = $this->getInstance();
         $this->assertNull($i->getLastModified());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testDelete() {
-
+    public function testDelete()
+    {
         $i = $this->getInstance();
         $i->delete();
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetName() {
-
+    public function testSetName()
+    {
         $i = $this->getInstance();
         $i->setName('foo');
-
     }
 
-    function testGetAlternateUriSet() {
-
+    public function testGetAlternateUriSet()
+    {
         $i = $this->getInstance();
         $this->assertEquals([], $i->getAlternateUriSet());
-
     }
 
-    function testGetPrincipalUri() {
-
+    public function testGetPrincipalUri()
+    {
         $i = $this->getInstance();
         $this->assertEquals('principal/user/calendar-proxy-read', $i->getPrincipalUrl());
-
     }
 
-    function testGetGroupMemberSet() {
-
+    public function testGetGroupMemberSet()
+    {
         $i = $this->getInstance();
         $this->assertEquals([], $i->getGroupMemberSet());
-
     }
 
-    function testGetGroupMembership() {
-
+    public function testGetGroupMembership()
+    {
         $i = $this->getInstance();
         $this->assertEquals([], $i->getGroupMembership());
-
     }
 
-    function testSetGroupMemberSet() {
-
+    public function testSetGroupMemberSet()
+    {
         $i = $this->getInstance();
         $i->setGroupMemberSet(['principals/foo']);
 
         $expected = [
-            $i->getPrincipalUrl() => ['principals/foo']
+            $i->getPrincipalUrl() => ['principals/foo'],
         ];
 
         $this->assertEquals($expected, $this->backend->groupMembers);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php
index 6cdb9b30e..df1715ee5 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php
@@ -1,40 +1,39 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAVACL;
 
-class ProxyWriteTest extends ProxyReadTest {
-
-    function getInstance() {
-
+class ProxyWriteTest extends ProxyReadTest
+{
+    public function getInstance()
+    {
         $backend = new DAVACL\PrincipalBackend\Mock();
         $principal = new ProxyWrite($backend, [
             'uri' => 'principal/user',
         ]);
         $this->backend = $backend;
-        return $principal;
 
+        return $principal;
     }
 
-    function testGetName() {
-
+    public function testGetName()
+    {
         $i = $this->getInstance();
         $this->assertEquals('calendar-proxy-write', $i->getName());
-
     }
-    function testGetDisplayName() {
 
+    public function testGetDisplayName()
+    {
         $i = $this->getInstance();
         $this->assertEquals('calendar-proxy-write', $i->getDisplayName());
-
     }
 
-    function testGetPrincipalUri() {
-
+    public function testGetPrincipalUri()
+    {
         $i = $this->getInstance();
         $this->assertEquals('principal/user/calendar-proxy-write', $i->getPrincipalUrl());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php
index 420bb3b1a..2c690c65d 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Principal;
 
 use Sabre\DAVACL;
 
-class UserTest extends \PHPUnit_Framework_TestCase {
-
-    function getInstance() {
-
+class UserTest extends \PHPUnit\Framework\TestCase
+{
+    public function getInstance()
+    {
         $backend = new DAVACL\PrincipalBackend\Mock();
         $backend->addPrincipal([
             'uri' => 'principals/user/calendar-proxy-read',
@@ -18,89 +20,81 @@ class UserTest extends \PHPUnit_Framework_TestCase {
         $backend->addPrincipal([
             'uri' => 'principals/user/random',
         ]);
+
         return new User($backend, [
             'uri' => 'principals/user',
         ]);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testCreateFile() {
-
+    public function testCreateFile()
+    {
         $u = $this->getInstance();
         $u->createFile('test');
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testCreateDirectory() {
-
+    public function testCreateDirectory()
+    {
         $u = $this->getInstance();
         $u->createDirectory('test');
-
     }
 
-    function testGetChildProxyRead() {
-
+    public function testGetChildProxyRead()
+    {
         $u = $this->getInstance();
         $child = $u->getChild('calendar-proxy-read');
         $this->assertInstanceOf('Sabre\\CalDAV\\Principal\\ProxyRead', $child);
-
     }
 
-    function testGetChildProxyWrite() {
-
+    public function testGetChildProxyWrite()
+    {
         $u = $this->getInstance();
         $child = $u->getChild('calendar-proxy-write');
         $this->assertInstanceOf('Sabre\\CalDAV\\Principal\\ProxyWrite', $child);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotFound
+     * @expectedException \Sabre\DAV\Exception\NotFound
      */
-    function testGetChildNotFound() {
-
+    public function testGetChildNotFound()
+    {
         $u = $this->getInstance();
         $child = $u->getChild('foo');
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotFound
+     * @expectedException \Sabre\DAV\Exception\NotFound
      */
-    function testGetChildNotFound2() {
-
+    public function testGetChildNotFound2()
+    {
         $u = $this->getInstance();
         $child = $u->getChild('random');
-
     }
 
-    function testGetChildren() {
-
+    public function testGetChildren()
+    {
         $u = $this->getInstance();
         $children = $u->getChildren();
         $this->assertEquals(2, count($children));
         $this->assertInstanceOf('Sabre\\CalDAV\\Principal\\ProxyRead', $children[0]);
         $this->assertInstanceOf('Sabre\\CalDAV\\Principal\\ProxyWrite', $children[1]);
-
     }
 
-    function testChildExist() {
-
+    public function testChildExist()
+    {
         $u = $this->getInstance();
         $this->assertTrue($u->childExists('calendar-proxy-read'));
         $this->assertTrue($u->childExists('calendar-proxy-write'));
         $this->assertFalse($u->childExists('foo'));
-
     }
 
-    function testGetACL() {
-
+    public function testGetACL()
+    {
         $expected = [
             [
                 'privilege' => '{DAV:}all',
@@ -121,7 +115,5 @@ class UserTest extends \PHPUnit_Framework_TestCase {
 
         $u = $this->getInstance();
         $this->assertEquals($expected, $u->getACL());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php
index 04d4b1237..df70fe7ec 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php
@@ -1,14 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Schedule;
 
 use Sabre\CalDAV;
-use Sabre\DAV;
-
-class OutboxTest extends \PHPUnit_Framework_TestCase {
-
-    function testSetup() {
 
+class OutboxTest extends \PHPUnit\Framework\TestCase
+{
+    public function testSetup()
+    {
         $outbox = new Outbox('principals/user1');
         $this->assertEquals('outbox', $outbox->getName());
         $this->assertEquals([], $outbox->getChildren());
@@ -17,7 +18,7 @@ class OutboxTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals([
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
+                'privilege' => '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-send',
                 'principal' => 'principals/user1',
                 'protected' => true,
             ],
@@ -27,7 +28,7 @@ class OutboxTest extends \PHPUnit_Framework_TestCase {
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
+                'privilege' => '{'.CalDAV\Plugin::NS_CALDAV.'}schedule-send',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
             ],
@@ -42,7 +43,5 @@ class OutboxTest extends \PHPUnit_Framework_TestCase {
                 'protected' => true,
             ],
         ], $outbox->getACL());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php
index f71c19523..735bbef41 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php
@@ -1,24 +1,26 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV\Sharing;
 use Sabre\DAV\Xml\Element\Sharee;
 
-class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
-
+class SharedCalendarTest extends \PHPUnit\Framework\TestCase
+{
     protected $backend;
 
-    function getInstance(array $props = null) {
-
+    public function getInstance(array $props = null)
+    {
         if (is_null($props)) {
             $props = [
-                'id'                                        => 1,
+                'id' => 1,
                 '{http://calendarserver.org/ns/}shared-url' => 'calendars/owner/original',
-                '{http://sabredav.org/ns}owner-principal'   => 'principals/owner',
-                '{http://sabredav.org/ns}read-only'         => false,
-                'share-access'                              => Sharing\Plugin::ACCESS_READWRITE,
-                'principaluri'                              => 'principals/sharee',
+                '{http://sabredav.org/ns}owner-principal' => 'principals/owner',
+                '{http://sabredav.org/ns}read-only' => false,
+                'share-access' => Sharing\Plugin::ACCESS_READWRITE,
+                'principaluri' => 'principals/sharee',
             ];
         }
 
@@ -35,11 +37,10 @@ class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
         $this->backend->updateInvites(1, [$sharee]);
 
         return new SharedCalendar($this->backend, $props);
-
     }
 
-    function testGetInvites() {
-
+    public function testGetInvites()
+    {
         $sharee = new Sharee();
         $sharee->href = 'mailto:removeme@example.org';
         $sharee->properties['{DAV:}displayname'] = 'To be removed';
@@ -50,15 +51,15 @@ class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
             [$sharee],
             $this->getInstance()->getInvites()
         );
-
     }
 
-    function testGetOwner() {
+    public function testGetOwner()
+    {
         $this->assertEquals('principals/sharee', $this->getInstance()->getOwner());
     }
 
-    function testGetACL() {
-
+    public function testGetACL()
+    {
         $expected = [
             [
                 'privilege' => '{DAV:}write',
@@ -96,18 +97,17 @@ class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+                'privilege' => '{'.Plugin::NS_CALDAV.'}read-free-busy',
                 'principal' => '{DAV:}authenticated',
                 'protected' => true,
             ],
         ];
 
         $this->assertEquals($expected, $this->getInstance()->getACL());
-
     }
 
-    function testGetChildACL() {
-
+    public function testGetChildACL()
+    {
         $expected = [
             [
                 'privilege' => '{DAV:}write',
@@ -134,19 +134,17 @@ class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
                 'principal' => 'principals/sharee/calendar-proxy-read',
                 'protected' => true,
             ],
-
         ];
 
         $this->assertEquals($expected, $this->getInstance()->getChildACL());
-
     }
 
-    function testUpdateInvites() {
-
+    public function testUpdateInvites()
+    {
         $instance = $this->getInstance();
         $newSharees = [
             new Sharee(),
-            new Sharee()
+            new Sharee(),
         ];
         $newSharees[0]->href = 'mailto:test@example.org';
         $newSharees[0]->properties['{DAV:}displayname'] = 'Foo Bar';
@@ -159,18 +157,16 @@ class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
         $instance->updateInvites($newSharees);
 
         $expected = [
-            clone $newSharees[0]
+            clone $newSharees[0],
         ];
         $expected[0]->inviteStatus = Sharing\Plugin::INVITE_NORESPONSE;
         $this->assertEquals($expected, $instance->getInvites());
-
     }
 
-    function testPublish() {
-
+    public function testPublish()
+    {
         $instance = $this->getInstance();
         $this->assertNull($instance->setPublishStatus(true));
         $this->assertNull($instance->setPublishStatus(false));
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php
index 9589176a3..57732cd06 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php
@@ -1,36 +1,38 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
 use Sabre\DAV\Xml\Element\Sharee;
 use Sabre\HTTP;
 
-class SharingPluginTest extends \Sabre\DAVServerTest {
-
+class SharingPluginTest extends \Sabre\DAVServerTest
+{
     protected $setupCalDAV = true;
     protected $setupCalDAVSharing = true;
     protected $setupACL = true;
     protected $autoLogin = 'user1';
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->caldavCalendars = [
             [
                 'principaluri' => 'principals/user1',
-                'id'           => 1,
-                'uri'          => 'cal1',
+                'id' => 1,
+                'uri' => 'cal1',
             ],
             [
                 'principaluri' => 'principals/user1',
-                'id'           => 2,
-                'uri'          => 'cal2',
+                'id' => 2,
+                'uri' => 'cal2',
                 'share-access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
             ],
             [
                 'principaluri' => 'principals/user1',
-                'id'           => 3,
-                'uri'          => 'cal3',
+                'id' => 3,
+                'uri' => 'cal3',
             ],
         ];
 
@@ -38,86 +40,79 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
         // Making the logged in user an admin, for full access:
         $this->aclPlugin->adminPrincipals[] = 'principals/user2';
-
     }
 
-    function testSimple() {
-
+    public function testSimple()
+    {
         $this->assertInstanceOf('Sabre\\CalDAV\\SharingPlugin', $this->server->getPlugin('caldav-sharing'));
         $this->assertEquals(
             'caldav-sharing',
             $this->caldavSharingPlugin->getPluginInfo()['name']
         );
-
     }
 
     /**
      * @expectedException \LogicException
      */
-    function testSetupWithoutCoreSharingPlugin() {
-
+    public function testSetupWithoutCoreSharingPlugin()
+    {
         $server = new DAV\Server();
         $server->addPlugin(
             new SharingPlugin()
         );
-
     }
 
-    function testGetFeatures() {
-
+    public function testGetFeatures()
+    {
         $this->assertEquals(['calendarserver-sharing'], $this->caldavSharingPlugin->getFeatures());
-
     }
 
-    function testBeforeGetShareableCalendar() {
-
+    public function testBeforeGetShareableCalendar()
+    {
         // Forcing the server to authenticate:
-        $this->authPlugin->beforeMethod(new HTTP\Request(), new HTTP\Response());
+        $this->authPlugin->beforeMethod(new HTTP\Request('GET', '/'), new HTTP\Response());
         $props = $this->server->getProperties('calendars/user1/cal1', [
-            '{' . Plugin::NS_CALENDARSERVER . '}invite',
-            '{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes',
+            '{'.Plugin::NS_CALENDARSERVER.'}invite',
+            '{'.Plugin::NS_CALENDARSERVER.'}allowed-sharing-modes',
         ]);
 
-        $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\Invite', $props['{' . Plugin::NS_CALENDARSERVER . '}invite']);
-        $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\AllowedSharingModes', $props['{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes']);
-
+        $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\Invite', $props['{'.Plugin::NS_CALENDARSERVER.'}invite']);
+        $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\AllowedSharingModes', $props['{'.Plugin::NS_CALENDARSERVER.'}allowed-sharing-modes']);
     }
 
-    function testBeforeGetSharedCalendar() {
-
+    public function testBeforeGetSharedCalendar()
+    {
         $props = $this->server->getProperties('calendars/user1/cal2', [
-            '{' . Plugin::NS_CALENDARSERVER . '}shared-url',
-            '{' . Plugin::NS_CALENDARSERVER . '}invite',
+            '{'.Plugin::NS_CALENDARSERVER.'}shared-url',
+            '{'.Plugin::NS_CALENDARSERVER.'}invite',
         ]);
 
-        $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\Invite', $props['{' . Plugin::NS_CALENDARSERVER . '}invite']);
+        $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\Invite', $props['{'.Plugin::NS_CALENDARSERVER.'}invite']);
         //$this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $props['{' . Plugin::NS_CALENDARSERVER . '}shared-url']);
-
     }
 
-    function testUpdateResourceType() {
-
+    public function testUpdateResourceType()
+    {
         $this->caldavBackend->updateInvites(1,
             [
                 new Sharee([
                     'href' => 'mailto:joe@example.org',
-                ])
+                ]),
             ]
         );
         $result = $this->server->updateProperties('calendars/user1/cal1', [
-            '{DAV:}resourcetype' => new DAV\Xml\Property\ResourceType(['{DAV:}collection'])
+            '{DAV:}resourcetype' => new DAV\Xml\Property\ResourceType(['{DAV:}collection']),
         ]);
 
         $this->assertEquals([
-            '{DAV:}resourcetype' => 200
+            '{DAV:}resourcetype' => 200,
         ], $result);
 
         $this->assertEquals(0, count($this->caldavBackend->getInvites(1)));
-
     }
 
-    function testUpdatePropertiesPassThru() {
-
+    public function testUpdatePropertiesPassThru()
+    {
         $result = $this->server->updateProperties('calendars/user1/cal3', [
             '{DAV:}foo' => 'bar',
         ]);
@@ -125,52 +120,48 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
         $this->assertEquals([
             '{DAV:}foo' => 200,
         ], $result);
-
     }
 
-    function testUnknownMethodNoPOST() {
-
+    public function testUnknownMethodNoPOST()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PATCH',
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
         ]);
 
         $response = $this->request($request);
 
         $this->assertEquals(501, $response->status, $response->body);
-
     }
 
-    function testUnknownMethodNoXML() {
-
+    public function testUnknownMethodNoXML()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/',
-            'CONTENT_TYPE'   => 'text/plain',
+            'REQUEST_URI' => '/',
+            'CONTENT_TYPE' => 'text/plain',
         ]);
 
         $response = $this->request($request);
 
         $this->assertEquals(501, $response->status, $response->body);
-
     }
 
-    function testUnknownMethodNoNode() {
-
+    public function testUnknownMethodNoNode()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/foo',
-            'CONTENT_TYPE'   => 'text/xml',
+            'REQUEST_URI' => '/foo',
+            'CONTENT_TYPE' => 'text/xml',
         ]);
 
         $response = $this->request($request);
 
         $this->assertEquals(501, $response->status, $response->body);
-
     }
 
-    function testShareRequest() {
-
+    public function testShareRequest()
+    {
         $request = new HTTP\Request('POST', '/calendars/user1/cal1', ['Content-Type' => 'text/xml']);
 
         $xml = <<<RRR
@@ -194,13 +185,13 @@ RRR;
         $this->assertEquals(
             [
                 new Sharee([
-                    'href'       => 'mailto:joe@example.org',
+                    'href' => 'mailto:joe@example.org',
                     'properties' => [
                         '{DAV:}displayname' => 'Joe Shmoe',
                     ],
-                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
+                    'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
                     'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_NORESPONSE,
-                    'comment'      => '',
+                    'comment' => '',
                 ]),
             ],
             $this->caldavBackend->getInvites(1)
@@ -214,11 +205,10 @@ RRR;
         $this->assertTrue(
             $props['{DAV:}resourcetype']->is('{http://calendarserver.org/ns/}shared-owner')
         );
-
     }
 
-    function testShareRequestNoShareableCalendar() {
-
+    public function testShareRequestNoShareableCalendar()
+    {
         $request = new HTTP\Request(
             'POST',
             '/calendars/user1/cal2',
@@ -226,7 +216,7 @@ RRR;
         );
 
         $xml = '<?xml version="1.0"?>
-<cs:share xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
+<cs:share xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:">
     <cs:set>
         <d:href>mailto:joe@example.org</d:href>
         <cs:common-name>Joe Shmoe</cs:common-name>
@@ -241,19 +231,18 @@ RRR;
         $request->setBody($xml);
 
         $response = $this->request($request, 403);
-
     }
 
-    function testInviteReply() {
-
+    public function testInviteReply()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1',
-            'CONTENT_TYPE'   => 'text/xml',
+            'REQUEST_URI' => '/calendars/user1',
+            'CONTENT_TYPE' => 'text/xml',
         ]);
 
         $xml = '<?xml version="1.0"?>
-<cs:invite-reply xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
+<cs:invite-reply xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:">
     <cs:hosturl><d:href>/principals/owner</d:href></cs:hosturl>
     <cs:invite-accepted />
 </cs:invite-reply>
@@ -262,37 +251,35 @@ RRR;
         $request->setBody($xml);
         $response = $this->request($request);
         $this->assertEquals(200, $response->status, $response->body);
-
     }
 
-    function testInviteBadXML() {
-
+    public function testInviteBadXML()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1',
-            'CONTENT_TYPE'   => 'text/xml',
+            'REQUEST_URI' => '/calendars/user1',
+            'CONTENT_TYPE' => 'text/xml',
         ]);
 
         $xml = '<?xml version="1.0"?>
-<cs:invite-reply xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
+<cs:invite-reply xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:">
 </cs:invite-reply>
 ';
         $request->setBody($xml);
         $response = $this->request($request);
         $this->assertEquals(400, $response->status, $response->body);
-
     }
 
-    function testInviteWrongUrl() {
-
+    public function testInviteWrongUrl()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal1',
-            'CONTENT_TYPE'   => 'text/xml',
+            'REQUEST_URI' => '/calendars/user1/cal1',
+            'CONTENT_TYPE' => 'text/xml',
         ]);
 
         $xml = '<?xml version="1.0"?>
-<cs:invite-reply xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
+<cs:invite-reply xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:">
     <cs:hosturl><d:href>/principals/owner</d:href></cs:hosturl>
 </cs:invite-reply>
 ';
@@ -303,27 +290,33 @@ RRR;
         // If the plugin did not handle this request, it must ensure that the
         // body is still accessible by other plugins.
         $this->assertEquals($xml, $request->getBody(true));
-
     }
 
-    function testPublish() {
+    public function testPostWithoutContentType()
+    {
+        $request = new HTTP\Request('POST', '/');
+        $response = new HTTP\ResponseMock();
+
+        $this->caldavSharingPlugin->httpPost($request, $response);
+        $this->assertTrue(true);
+    }
 
+    public function testPublish()
+    {
         $request = new HTTP\Request('POST', '/calendars/user1/cal1', ['Content-Type' => 'text/xml']);
 
         $xml = '<?xml version="1.0"?>
-<cs:publish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
+<cs:publish-calendar xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:" />
 ';
 
         $request->setBody($xml);
 
         $response = $this->request($request);
         $this->assertEquals(202, $response->status, $response->body);
-
     }
 
-
-    function testUnpublish() {
-
+    public function testUnpublish()
+    {
         $request = new HTTP\Request(
             'POST',
             '/calendars/user1/cal1',
@@ -331,18 +324,17 @@ RRR;
         );
 
         $xml = '<?xml version="1.0"?>
-<cs:unpublish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
+<cs:unpublish-calendar xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:" />
 ';
 
         $request->setBody($xml);
 
         $response = $this->request($request);
         $this->assertEquals(200, $response->status, $response->body);
-
     }
 
-    function testPublishWrongUrl() {
-
+    public function testPublishWrongUrl()
+    {
         $request = new HTTP\Request(
             'POST',
             '/calendars/user1',
@@ -350,34 +342,31 @@ RRR;
         );
 
         $xml = '<?xml version="1.0"?>
-<cs:publish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
+<cs:publish-calendar xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:" />
 ';
 
         $request->setBody($xml);
         $this->request($request, 501);
-
     }
 
-    function testUnpublishWrongUrl() {
-
+    public function testUnpublishWrongUrl()
+    {
         $request = new HTTP\Request(
             'POST',
             '/calendars/user1',
             ['Content-Type' => 'text/xml']
         );
         $xml = '<?xml version="1.0"?>
-<cs:unpublish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
+<cs:unpublish-calendar xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:" />
 ';
 
         $request->setBody($xml);
 
         $this->request($request, 501);
-
     }
 
-    function testUnknownXmlDoc() {
-
-
+    public function testUnknownXmlDoc()
+    {
         $request = new HTTP\Request(
             'POST',
             '/calendars/user1/cal2',
@@ -385,12 +374,11 @@ RRR;
         );
 
         $xml = '<?xml version="1.0"?>
-<cs:foo-bar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />';
+<cs:foo-bar xmlns:cs="'.Plugin::NS_CALENDARSERVER.'" xmlns:d="DAV:" />';
 
         $request->setBody($xml);
 
         $response = $this->request($request);
         $this->assertEquals(501, $response->status, $response->body);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php b/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php
index 673d39c0a..72b5080af 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php
@@ -1,39 +1,41 @@
 <?php
 
-namespace Sabre\CalDAV;
-
-class TestUtil {
+declare(strict_types=1);
 
-    static function getBackend() {
+namespace Sabre\CalDAV;
 
+class TestUtil
+{
+    public static function getBackend()
+    {
         $backend = new Backend\Mock();
         $calendarId = $backend->createCalendar(
             'principals/user1',
             'UUID-123467',
             [
-                '{DAV:}displayname'                                   => 'user1 calendar',
+                '{DAV:}displayname' => 'user1 calendar',
                 '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'Calendar description',
-                '{http://apple.com/ns/ical/}calendar-order'           => '1',
-                '{http://apple.com/ns/ical/}calendar-color'           => '#FF0000',
+                '{http://apple.com/ns/ical/}calendar-order' => '1',
+                '{http://apple.com/ns/ical/}calendar-color' => '#FF0000',
             ]
         );
         $backend->createCalendar(
             'principals/user1',
             'UUID-123468',
             [
-                '{DAV:}displayname'                                   => 'user1 calendar2',
+                '{DAV:}displayname' => 'user1 calendar2',
                 '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'Calendar description',
-                '{http://apple.com/ns/ical/}calendar-order'           => '1',
-                '{http://apple.com/ns/ical/}calendar-color'           => '#FF0000',
+                '{http://apple.com/ns/ical/}calendar-order' => '1',
+                '{http://apple.com/ns/ical/}calendar-color' => '#FF0000',
             ]
         );
         $backend->createCalendarObject($calendarId, 'UUID-2345', self::getTestCalendarData());
-        return $backend;
 
+        return $backend;
     }
 
-    static function getTestCalendarData($type = 1) {
-
+    public static function getTestCalendarData($type = 1)
+    {
         $calendarData = 'BEGIN:VCALENDAR
 VERSION:2.0
 PRODID:-//Apple Inc.//iCal 4.0.1//EN
@@ -62,108 +64,104 @@ SUMMARY:Something here
 DTSTAMP:20100228T130202Z';
 
         switch ($type) {
-            case 1 :
+            case 1:
                 $calendarData .= "\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDTEND;TZID=Asia/Seoul:20100223T070000\n";
                 break;
-            case 2 :
+            case 2:
                 $calendarData .= "\nDTSTART:20100223T060000\nDTEND:20100223T070000\n";
                 break;
-            case 3 :
+            case 3:
                 $calendarData .= "\nDTSTART;VALUE=DATE:20100223\nDTEND;VALUE=DATE:20100223\n";
                 break;
-            case 4 :
+            case 4:
                 $calendarData .= "\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDURATION:PT1H\n";
                 break;
-            case 5 :
+            case 5:
                 $calendarData .= "\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDURATION:-P5D\n";
                 break;
-            case 6 :
+            case 6:
                 $calendarData .= "\nDTSTART;VALUE=DATE:20100223\n";
                 break;
-            case 7 :
+            case 7:
                 $calendarData .= "\nDTSTART;VALUE=DATETIME:20100223T060000\n";
                 break;
 
             // No DTSTART, so intentionally broken
-            case 'X' :
+            case 'X':
                 $calendarData .= "\n";
                 break;
         }
 
-
         $calendarData .= 'ATTENDEE;PARTSTAT=NEEDS-ACTION:mailto:lisa@example.com
 SEQUENCE:2
 END:VEVENT
 END:VCALENDAR';
 
         return $calendarData;
-
     }
 
-    static function getTestTODO($type = 'due') {
-
+    public static function getTestTODO($type = 'due')
+    {
         switch ($type) {
-
-            case 'due' :
-                $extra = "DUE:20100104T000000Z";
+            case 'due':
+                $extra = 'DUE:20100104T000000Z';
                 break;
-            case 'due2' :
-                $extra = "DUE:20060104T000000Z";
+            case 'due2':
+                $extra = 'DUE:20060104T000000Z';
                 break;
-            case 'due_date' :
-                $extra = "DUE;VALUE=DATE:20060104";
+            case 'due_date':
+                $extra = 'DUE;VALUE=DATE:20060104';
                 break;
-            case 'due_tz' :
-                $extra = "DUE;TZID=Asia/Seoul:20060104T000000Z";
+            case 'due_tz':
+                $extra = 'DUE;TZID=Asia/Seoul:20060104T000000Z';
                 break;
-            case 'due_dtstart' :
+            case 'due_dtstart':
                 $extra = "DTSTART:20050223T060000Z\nDUE:20060104T000000Z";
                 break;
-            case 'due_dtstart2' :
+            case 'due_dtstart2':
                 $extra = "DTSTART:20090223T060000Z\nDUE:20100104T000000Z";
                 break;
-            case 'dtstart' :
+            case 'dtstart':
                 $extra = 'DTSTART:20100223T060000Z';
                 break;
-            case 'dtstart2' :
+            case 'dtstart2':
                 $extra = 'DTSTART:20060223T060000Z';
                 break;
-            case 'dtstart_date' :
+            case 'dtstart_date':
                 $extra = 'DTSTART;VALUE=DATE:20100223';
                 break;
-            case 'dtstart_tz' :
+            case 'dtstart_tz':
                 $extra = 'DTSTART;TZID=Asia/Seoul:20100223T060000Z';
                 break;
-            case 'dtstart_duration' :
+            case 'dtstart_duration':
                 $extra = "DTSTART:20061023T060000Z\nDURATION:PT1H";
                 break;
-            case 'dtstart_duration2' :
+            case 'dtstart_duration2':
                 $extra = "DTSTART:20101023T060000Z\nDURATION:PT1H";
                 break;
-            case 'completed' :
+            case 'completed':
                 $extra = 'COMPLETED:20060601T000000Z';
                 break;
-            case 'completed2' :
+            case 'completed2':
                 $extra = 'COMPLETED:20090601T000000Z';
                 break;
-            case 'created' :
+            case 'created':
                 $extra = 'CREATED:20060601T000000Z';
                 break;
-            case 'created2' :
+            case 'created2':
                 $extra = 'CREATED:20090601T000000Z';
                 break;
-            case 'completedcreated' :
+            case 'completedcreated':
                 $extra = "CREATED:20060601T000000Z\nCOMPLETED:20070101T000000Z";
                 break;
-            case 'completedcreated2' :
+            case 'completedcreated2':
                 $extra = "CREATED:20090601T000000Z\nCOMPLETED:20100101T000000Z";
                 break;
-            case 'notime' :
+            case 'notime':
                 $extra = 'X-FILLER:oh hello';
                 break;
-            default :
-                throw new Exception('Unknown type: ' . $type);
-
+            default:
+                throw new Exception('Unknown type: '.$type);
         }
 
         $todo = 'BEGIN:VCALENDAR
@@ -171,7 +169,7 @@ VERSION:2.0
 PRODID:-//Example Corp.//CalDAV Client//EN
 BEGIN:VTODO
 DTSTAMP:20060205T235335Z
-' . $extra . '
+'.$extra.'
 STATUS:NEEDS-ACTION
 SUMMARY:Task #1
 UID:DDDEEB7915FA61233B861457@example.com
@@ -183,7 +181,5 @@ END:VTODO
 END:VCALENDAR';
 
         return $todo;
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php
index 629df90c1..e6d1edace 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
@@ -8,8 +10,8 @@ use Sabre\HTTP;
 
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class ValidateICalTest extends \PHPUnit_Framework_TestCase {
-
+class ValidateICalTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var Sabre\DAV\Server
      */
@@ -19,21 +21,21 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
      */
     protected $calBackend;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $calendars = [
             [
-                'id'                                                              => 'calendar1',
-                'principaluri'                                                    => 'principals/admin',
-                'uri'                                                             => 'calendar1',
+                'id' => 'calendar1',
+                'principaluri' => 'principals/admin',
+                'uri' => 'calendar1',
                 '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO', 'VJOURNAL']),
             ],
             [
-                'id'                                                              => 'calendar2',
-                'principaluri'                                                    => 'principals/admin',
-                'uri'                                                             => 'calendar2',
+                'id' => 'calendar2',
+                'principaluri' => 'principals/admin',
+                'uri' => 'calendar2',
                 '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VTODO', 'VJOURNAL']),
-            ]
+            ],
         ];
 
         $this->calBackend = new Backend\Mock($calendars, []);
@@ -52,33 +54,30 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
 
         $response = new HTTP\ResponseMock();
         $this->server->httpResponse = $response;
-
     }
 
-    function request(HTTP\Request $request) {
-
+    public function request(HTTP\Request $request)
+    {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         return $this->server->httpResponse;
-
     }
 
-    function testCreateFile() {
-
+    public function testCreateFile()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
         ]);
 
         $response = $this->request($request);
 
         $this->assertEquals(415, $response->status);
-
     }
 
-    function testCreateFileValid() {
-
+    public function testCreateFileValid()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/calendars/admin/calendar1/blabla.ics',
@@ -101,26 +100,25 @@ ICS;
 
         $response = $this->request($request);
 
-        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length'  => ['0'],
-            'ETag'            => ['"' . md5($ics) . '"'],
+            'Content-Length' => ['0'],
+            'ETag' => ['"'.md5($ics).'"'],
         ], $response->getHeaders());
 
         $expected = [
-            'uri'          => 'blabla.ics',
+            'uri' => 'blabla.ics',
             'calendardata' => $ics,
-            'calendarid'   => 'calendar1',
+            'calendarid' => 'calendar1',
             'lastmodified' => null,
         ];
 
         $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1', 'blabla.ics'));
-
     }
 
-    function testCreateFileNoVersion() {
-
+    public function testCreateFileNoVersion()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/calendars/admin/calendar1/blabla.ics',
@@ -142,12 +140,11 @@ ICS;
 
         $response = $this->request($request);
 
-        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testCreateFileNoVersionFixed() {
-
+    public function testCreateFileNoVersionFixed()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/calendars/admin/calendar1/blabla.ics',
@@ -169,10 +166,10 @@ ICS;
 
         $response = $this->request($request);
 
-        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
         $this->assertEquals([
-            'X-Sabre-Version'  => [DAV\Version::VERSION],
-            'Content-Length'   => ['0'],
+            'X-Sabre-Version' => [DAV\Version::VERSION],
+            'Content-Length' => ['0'],
             'X-Sabre-Ew-Gross' => ['iCalendar validation warning: VERSION MUST appear exactly once in a VCALENDAR component'],
         ], $response->getHeaders());
 
@@ -190,18 +187,17 @@ END:VCALENDAR\r
 ICS;
 
         $expected = [
-            'uri'          => 'blabla.ics',
+            'uri' => 'blabla.ics',
             'calendardata' => $ics,
-            'calendarid'   => 'calendar1',
+            'calendarid' => 'calendar1',
             'lastmodified' => null,
         ];
 
         $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1', 'blabla.ics'));
-
     }
 
-    function testCreateFileNoComponents() {
-
+    public function testCreateFileNoComponents()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/calendars/admin/calendar1/blabla.ics',
@@ -217,96 +213,89 @@ ICS;
         $request->setBody($ics);
 
         $response = $this->request($request);
-        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testCreateFileNoUID() {
-
+    public function testCreateFileNoUID()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
         ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testCreateFileVCard() {
-
+    public function testCreateFileVCard()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
         ]);
         $request->setBody("BEGIN:VCARD\r\nEND:VCARD\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testCreateFile2Components() {
-
+    public function testCreateFile2Components()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
         ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nBEGIN:VJOURNAL\r\nUID:foo\r\nEND:VJOURNAL\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testCreateFile2UIDS() {
-
+    public function testCreateFile2UIDS()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
         ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nBEGIN:VEVENT\r\nUID:bar\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testCreateFileWrongComponent() {
-
+    public function testCreateFileWrongComponent()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
         ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VFREEBUSY\r\nUID:foo\r\nEND:VFREEBUSY\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testUpdateFile() {
-
+    public function testUpdateFile()
+    {
         $this->calBackend->createCalendarObject('calendar1', 'blabla.ics', 'foo');
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
         ]);
 
         $response = $this->request($request);
 
         $this->assertEquals(415, $response->status);
-
     }
 
-    function testUpdateFileParsableBody() {
-
+    public function testUpdateFileParsableBody()
+    {
         $this->calBackend->createCalendarObject('calendar1', 'blabla.ics', 'foo');
         $request = new HTTP\Request(
             'PUT',
@@ -330,43 +319,40 @@ ICS;
         $this->assertEquals(204, $response->status);
 
         $expected = [
-            'uri'          => 'blabla.ics',
+            'uri' => 'blabla.ics',
             'calendardata' => $ics,
-            'calendarid'   => 'calendar1',
+            'calendarid' => 'calendar1',
             'lastmodified' => null,
         ];
 
         $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1', 'blabla.ics'));
-
     }
 
-    function testCreateFileInvalidComponent() {
-
+    public function testCreateFileInvalidComponent()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar2/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar2/blabla.ics',
         ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testUpdateFileInvalidComponent() {
-
+    public function testUpdateFileInvalidComponent()
+    {
         $this->calBackend->createCalendarObject('calendar2', 'blabla.ics', 'foo');
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/calendars/admin/calendar2/blabla.ics',
+            'REQUEST_URI' => '/calendars/admin/calendar2/blabla.ics',
         ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
     /**
@@ -376,8 +362,8 @@ ICS;
      * More importantly. If any transformation happens, the etag must no longer
      * be returned by the server.
      */
-    function testCreateFileModified() {
-
+    public function testCreateFileModified()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/calendars/admin/calendar1/blabla.ics'
@@ -399,8 +385,7 @@ ICS;
 
         $response = $this->request($request);
 
-        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
         $this->assertNull($response->getHeader('ETag'));
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php
index 552e2ba77..c945e2c58 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 use Sabre\DAVACL;
 use Sabre\HTTP;
 
-abstract class AbstractPluginTest extends \PHPUnit_Framework_TestCase {
-
+abstract class AbstractPluginTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var Sabre\CardDAV\Plugin
      */
@@ -21,14 +23,14 @@ abstract class AbstractPluginTest extends \PHPUnit_Framework_TestCase {
      */
     protected $backend;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->backend = new Backend\Mock();
         $principalBackend = new DAVACL\PrincipalBackend\Mock();
 
         $tree = [
             new AddressBookRoot($principalBackend, $this->backend),
-            new DAVACL\PrincipalCollection($principalBackend)
+            new DAVACL\PrincipalCollection($principalBackend),
         ];
 
         $this->plugin = new Plugin();
@@ -37,7 +39,5 @@ abstract class AbstractPluginTest extends \PHPUnit_Framework_TestCase {
         $this->server->sapi = new HTTP\SapiMock();
         $this->server->addPlugin($this->plugin);
         $this->server->debugExceptions = true;
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php
index f8da38a16..6e7e13106 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
@@ -8,10 +10,10 @@ use Sabre\HTTP;
 require_once 'Sabre/CardDAV/AbstractPluginTest.php';
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class AddressBookQueryTest extends AbstractPluginTest {
-
-    function testQuery() {
-
+class AddressBookQueryTest extends AbstractPluginTest
+{
+    public function testQuery()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/addressbooks/user1/book1',
@@ -37,7 +39,7 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -47,21 +49,19 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals([
             '/addressbooks/user1/book1/card1' => [
                 200 => [
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD").'"',
                 ],
              ],
             '/addressbooks/user1/book1/card2' => [
                 404 => [
                     '{DAV:}getetag' => null,
                 ],
-            ]
+            ],
         ], $result);
-
-
     }
 
-    function testQueryDepth0() {
-
+    public function testQueryDepth0()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/addressbooks/user1/book1/card1',
@@ -87,7 +87,7 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -97,16 +97,14 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals([
             '/addressbooks/user1/book1/card1' => [
                 200 => [
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD").'"',
                 ],
              ],
         ], $result);
-
-
     }
 
-    function testQueryNoMatch() {
-
+    public function testQueryNoMatch()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/addressbooks/user1/book1',
@@ -132,7 +130,7 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -140,15 +138,14 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $result = $client->parseMultiStatus($response->body);
 
         $this->assertEquals([], $result);
-
     }
 
-    function testQueryLimit() {
-
+    public function testQueryLimit()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI'    => '/addressbooks/user1/book1',
-            'HTTP_DEPTH'     => '1',
+            'REQUEST_URI' => '/addressbooks/user1/book1',
+            'HTTP_DEPTH' => '1',
         ]);
 
         $request->setBody(
@@ -171,7 +168,7 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -181,16 +178,14 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals([
             '/addressbooks/user1/book1/card1' => [
                 200 => [
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD").'"',
                 ],
              ],
         ], $result);
-
-
     }
 
-    function testJson() {
-
+    public function testJson()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/addressbooks/user1/book1/card1',
@@ -214,7 +209,7 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -226,16 +221,15 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals([
             '/addressbooks/user1/book1/card1' => [
                 200 => [
-                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
-                    '{urn:ietf:params:xml:ns:carddav}address-data' => '["vcard",[["version",{},"text","4.0"],["prodid",{},"text","-\/\/Sabre\/\/Sabre VObject ' . $vobjVersion . '\/\/EN"],["uid",{},"text","12345"]]]',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD").'"',
+                    '{urn:ietf:params:xml:ns:carddav}address-data' => '["vcard",[["version",{},"text","4.0"],["prodid",{},"text","-\/\/Sabre\/\/Sabre VObject '.$vobjVersion.'\/\/EN"],["uid",{},"text","12345"]]]',
                 ],
              ],
         ], $result);
-
     }
 
-    function testVCard4() {
-
+    public function testVCard4()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/addressbooks/user1/book1/card1',
@@ -259,7 +253,7 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -271,16 +265,15 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals([
             '/addressbooks/user1/book1/card1' => [
                 200 => [
-                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD").'"',
                     '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\r\nVERSION:4.0\r\nPRODID:-//Sabre//Sabre VObject $vobjVersion//EN\r\nUID:12345\r\nEND:VCARD\r\n",
                 ],
              ],
         ], $result);
-
     }
 
-    function testAddressBookDepth0() {
-
+    public function testAddressBookDepth0()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/addressbooks/user1/book1',
@@ -304,11 +297,11 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(415, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(415, $response->status, 'Incorrect status code. Full response body:'.$response->body);
     }
 
-    function testAddressBookProperties() {
-
+    public function testAddressBookProperties()
+    {
         $request = new HTTP\Request(
             'REPORT',
             '/addressbooks/user1/book3',
@@ -335,7 +328,7 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -345,11 +338,10 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals([
             '/addressbooks/user1/book3/card3' => [
                 200 => [
-                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nFN:Test-Card\nEMAIL;TYPE=home:bar@example.org\nEND:VCARD") . '"',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nFN:Test-Card\nEMAIL;TYPE=home:bar@example.org\nEND:VCARD").'"',
                     '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\r\nVERSION:3.0\r\nUID:12345\r\nFN:Test-Card\r\nEND:VCARD\r\n",
                 ],
             ],
         ], $result);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookRootTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookRootTest.php
index fc20480f2..c4aff2712 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookRootTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookRootTest.php
@@ -1,22 +1,23 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAVACL;
 
-class AddressBookRootTest extends \PHPUnit_Framework_TestCase {
-
-    function testGetName() {
-
+class AddressBookRootTest extends \PHPUnit\Framework\TestCase
+{
+    public function testGetName()
+    {
         $pBackend = new DAVACL\PrincipalBackend\Mock();
         $cBackend = new Backend\Mock();
         $root = new AddressBookRoot($pBackend, $cBackend);
         $this->assertEquals('addressbooks', $root->getName());
-
     }
 
-    function testGetChildForPrincipal() {
-
+    public function testGetChildForPrincipal()
+    {
         $pBackend = new DAVACL\PrincipalBackend\Mock();
         $cBackend = new Backend\Mock();
         $root = new AddressBookRoot($pBackend, $cBackend);
@@ -26,6 +27,5 @@ class AddressBookRootTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertInstanceOf('Sabre\\CardDAV\\AddressBookHome', $children[0]);
         $this->assertEquals('user1', $children[0]->getName());
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php
index 1f0064dd3..879816803 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV\PropPatch;
 
-class AddressBookTest extends \PHPUnit_Framework_TestCase {
-
+class AddressBookTest extends \PHPUnit\Framework\TestCase
+{
     use \Sabre\DAV\DbTestHelperTrait;
 
     /**
@@ -14,98 +16,88 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
     protected $ab;
     protected $backend;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->backend = new Backend\Mock();
         $this->ab = new AddressBook(
             $this->backend,
             [
-                'uri'               => 'book1',
-                'id'                => 'foo',
+                'uri' => 'book1',
+                'id' => 'foo',
                 '{DAV:}displayname' => 'd-name',
-                'principaluri'      => 'principals/user1',
+                'principaluri' => 'principals/user1',
             ]
         );
-
     }
 
-    function testGetName() {
-
+    public function testGetName()
+    {
         $this->assertEquals('book1', $this->ab->getName());
-
     }
 
-    function testGetChild() {
-
+    public function testGetChild()
+    {
         $card = $this->ab->getChild('card1');
         $this->assertInstanceOf('Sabre\\CardDAV\\Card', $card);
         $this->assertEquals('card1', $card->getName());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotFound
+     * @expectedException \Sabre\DAV\Exception\NotFound
      */
-    function testGetChildNotFound() {
-
+    public function testGetChildNotFound()
+    {
         $card = $this->ab->getChild('card3');
-
     }
 
-    function testGetChildren() {
-
+    public function testGetChildren()
+    {
         $cards = $this->ab->getChildren();
         $this->assertEquals(2, count($cards));
 
         $this->assertEquals('card1', $cards[0]->getName());
         $this->assertEquals('card2', $cards[1]->getName());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\MethodNotAllowed
      */
-    function testCreateDirectory() {
-
+    public function testCreateDirectory()
+    {
         $this->ab->createDirectory('name');
-
     }
 
-    function testCreateFile() {
-
+    public function testCreateFile()
+    {
         $file = fopen('php://memory', 'r+');
         fwrite($file, 'foo');
         rewind($file);
         $this->ab->createFile('card2', $file);
 
         $this->assertEquals('foo', $this->backend->cards['foo']['card2']);
-
     }
 
-    function testDelete() {
-
+    public function testDelete()
+    {
         $this->ab->delete();
         $this->assertEquals(1, count($this->backend->addressBooks));
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\MethodNotAllowed
      */
-    function testSetName() {
-
+    public function testSetName()
+    {
         $this->ab->setName('foo');
-
     }
 
-    function testGetLastModified() {
-
+    public function testGetLastModified()
+    {
         $this->assertNull($this->ab->getLastModified());
-
     }
 
-    function testUpdateProperties() {
-
+    public function testUpdateProperties()
+    {
         $propPatch = new PropPatch([
             '{DAV:}displayname' => 'barrr',
         ]);
@@ -113,20 +105,18 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($propPatch->commit());
 
         $this->assertEquals('barrr', $this->backend->addressBooks[0]['{DAV:}displayname']);
-
     }
 
-    function testGetProperties() {
-
+    public function testGetProperties()
+    {
         $props = $this->ab->getProperties(['{DAV:}displayname']);
         $this->assertEquals([
             '{DAV:}displayname' => 'd-name',
         ], $props);
-
     }
 
-    function testACLMethods() {
-
+    public function testACLMethods()
+    {
         $this->assertEquals('principals/user1', $this->ab->getOwner());
         $this->assertNull($this->ab->getGroup());
         $this->assertEquals([
@@ -136,39 +126,35 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
                 'protected' => true,
             ],
         ], $this->ab->getACL());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetACL() {
-
-       $this->ab->setACL([]);
-
+    public function testSetACL()
+    {
+        $this->ab->setACL([]);
     }
 
-    function testGetSupportedPrivilegeSet() {
-
+    public function testGetSupportedPrivilegeSet()
+    {
         $this->assertNull(
             $this->ab->getSupportedPrivilegeSet()
         );
-
     }
 
-    function testGetSyncTokenNoSyncSupport() {
-
+    public function testGetSyncTokenNoSyncSupport()
+    {
         $this->assertNull($this->ab->getSyncToken());
-
     }
-    function testGetChangesNoSyncSupport() {
 
+    public function testGetChangesNoSyncSupport()
+    {
         $this->assertNull($this->ab->getChanges(1, null));
-
     }
 
-    function testGetSyncToken() {
-
+    public function testGetSyncToken()
+    {
         $this->driver = 'sqlite';
         $this->dropTables(['addressbooks', 'cards', 'addressbookchanges']);
         $this->createSchema('addressbooks');
@@ -179,8 +165,8 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(2, $ab->getSyncToken());
     }
 
-    function testGetSyncToken2() {
-
+    public function testGetSyncToken2()
+    {
         $this->driver = 'sqlite';
         $this->dropTables(['addressbooks', 'cards', 'addressbookchanges']);
         $this->createSchema('addressbooks');
@@ -190,5 +176,4 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
         $ab = new AddressBook($backend, ['id' => 1, '{http://sabredav.org/ns}sync-token' => 2]);
         $this->assertEquals(2, $ab->getSyncToken());
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php
index f62bfb1ae..e5bd088fc 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV\Backend;
 
 use Sabre\CardDAV;
 use Sabre\DAV\PropPatch;
 
-abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
-
+abstract class AbstractPDOTest extends \PHPUnit\Framework\TestCase
+{
     use \Sabre\DAV\DbTestHelperTrait;
 
     /**
@@ -14,8 +16,8 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
      */
     protected $backend;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->dropTables([
             'addressbooks',
             'cards',
@@ -26,36 +28,34 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->backend = new PDO($pdo);
         $pdo->exec("INSERT INTO addressbooks (principaluri, displayname, uri, description, synctoken) VALUES ('principals/user1', 'book1', 'book1', 'addressbook 1', 1)");
-        $pdo->exec("INSERT INTO cards (addressbookid, carddata, uri, lastmodified, etag, size) VALUES (1, 'card1', 'card1', 0, '" . md5('card1') . "', 5)");
-
+        $pdo->exec("INSERT INTO cards (addressbookid, carddata, uri, lastmodified, etag, size) VALUES (1, 'card1', 'card1', 0, '".md5('card1')."', 5)");
     }
 
-    function testGetAddressBooksForUser() {
-
+    public function testGetAddressBooksForUser()
+    {
         $result = $this->backend->getAddressBooksForUser('principals/user1');
 
         $expected = [
             [
-                'id'                                                          => 1,
-                'uri'                                                         => 'book1',
-                'principaluri'                                                => 'principals/user1',
-                '{DAV:}displayname'                                           => 'book1',
-                '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag'                      => 1,
-                '{http://sabredav.org/ns}sync-token'                          => 1
-            ]
+                'id' => 1,
+                'uri' => 'book1',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'book1',
+                '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'addressbook 1',
+                '{http://calendarserver.org/ns/}getctag' => 1,
+                '{http://sabredav.org/ns}sync-token' => 1,
+            ],
         ];
 
         $this->assertEquals($expected, $result);
-
     }
 
-    function testUpdateAddressBookInvalidProp() {
-
+    public function testUpdateAddressBookInvalidProp()
+    {
         $propPatch = new PropPatch([
-            '{DAV:}displayname'                                           => 'updated',
-            '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'updated',
-            '{DAV:}foo'                                                   => 'bar',
+            '{DAV:}displayname' => 'updated',
+            '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'updated',
+            '{DAV:}foo' => 'bar',
         ]);
 
         $this->backend->updateAddressBook(1, $propPatch);
@@ -67,22 +67,21 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $expected = [
             [
-                'id'                                                          => 1,
-                'uri'                                                         => 'book1',
-                'principaluri'                                                => 'principals/user1',
-                '{DAV:}displayname'                                           => 'book1',
-                '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag'                      => 1,
-                '{http://sabredav.org/ns}sync-token'                          => 1
-            ]
+                'id' => 1,
+                'uri' => 'book1',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'book1',
+                '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'addressbook 1',
+                '{http://calendarserver.org/ns/}getctag' => 1,
+                '{http://sabredav.org/ns}sync-token' => 1,
+            ],
         ];
 
         $this->assertEquals($expected, $result);
-
     }
 
-    function testUpdateAddressBookNoProps() {
-
+    public function testUpdateAddressBookNoProps()
+    {
         $propPatch = new PropPatch([
         ]);
 
@@ -94,26 +93,24 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $expected = [
             [
-                'id'                                                          => 1,
-                'uri'                                                         => 'book1',
-                'principaluri'                                                => 'principals/user1',
-                '{DAV:}displayname'                                           => 'book1',
-                '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag'                      => 1,
-                '{http://sabredav.org/ns}sync-token'                          => 1
-            ]
+                'id' => 1,
+                'uri' => 'book1',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'book1',
+                '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'addressbook 1',
+                '{http://calendarserver.org/ns/}getctag' => 1,
+                '{http://sabredav.org/ns}sync-token' => 1,
+            ],
         ];
 
         $this->assertEquals($expected, $result);
-
-
     }
 
-    function testUpdateAddressBookSuccess() {
-
+    public function testUpdateAddressBookSuccess()
+    {
         $propPatch = new PropPatch([
-            '{DAV:}displayname'                                           => 'updated',
-            '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'updated',
+            '{DAV:}displayname' => 'updated',
+            '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'updated',
         ]);
 
         $this->backend->updateAddressBook(1, $propPatch);
@@ -125,101 +122,95 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $expected = [
             [
-                'id'                                                          => 1,
-                'uri'                                                         => 'book1',
-                'principaluri'                                                => 'principals/user1',
-                '{DAV:}displayname'                                           => 'updated',
-                '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'updated',
-                '{http://calendarserver.org/ns/}getctag'                      => 2,
-                '{http://sabredav.org/ns}sync-token'                          => 2
-            ]
+                'id' => 1,
+                'uri' => 'book1',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'updated',
+                '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'updated',
+                '{http://calendarserver.org/ns/}getctag' => 2,
+                '{http://sabredav.org/ns}sync-token' => 2,
+            ],
         ];
 
         $this->assertEquals($expected, $result);
-
-
     }
 
-    function testDeleteAddressBook() {
-
+    public function testDeleteAddressBook()
+    {
         $this->backend->deleteAddressBook(1);
 
         $this->assertEquals([], $this->backend->getAddressBooksForUser('principals/user1'));
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\BadRequest
+     * @expectedException \Sabre\DAV\Exception\BadRequest
      */
-    function testCreateAddressBookUnsupportedProp() {
-
+    public function testCreateAddressBookUnsupportedProp()
+    {
         $this->backend->createAddressBook('principals/user1', 'book2', [
             '{DAV:}foo' => 'bar',
         ]);
-
     }
 
-    function testCreateAddressBookSuccess() {
-
+    public function testCreateAddressBookSuccess()
+    {
         $this->backend->createAddressBook('principals/user1', 'book2', [
-            '{DAV:}displayname'                                           => 'book2',
-            '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 2',
+            '{DAV:}displayname' => 'book2',
+            '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'addressbook 2',
         ]);
 
         $expected = [
             [
-                'id'                                                          => 1,
-                'uri'                                                         => 'book1',
-                'principaluri'                                                => 'principals/user1',
-                '{DAV:}displayname'                                           => 'book1',
-                '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag'                      => 1,
-                '{http://sabredav.org/ns}sync-token'                          => 1,
+                'id' => 1,
+                'uri' => 'book1',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'book1',
+                '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'addressbook 1',
+                '{http://calendarserver.org/ns/}getctag' => 1,
+                '{http://sabredav.org/ns}sync-token' => 1,
             ],
             [
-                'id'                                                          => 2,
-                'uri'                                                         => 'book2',
-                'principaluri'                                                => 'principals/user1',
-                '{DAV:}displayname'                                           => 'book2',
-                '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 2',
-                '{http://calendarserver.org/ns/}getctag'                      => 1,
-                '{http://sabredav.org/ns}sync-token'                          => 1,
-            ]
+                'id' => 2,
+                'uri' => 'book2',
+                'principaluri' => 'principals/user1',
+                '{DAV:}displayname' => 'book2',
+                '{'.CardDAV\Plugin::NS_CARDDAV.'}addressbook-description' => 'addressbook 2',
+                '{http://calendarserver.org/ns/}getctag' => 1,
+                '{http://sabredav.org/ns}sync-token' => 1,
+            ],
         ];
         $result = $this->backend->getAddressBooksForUser('principals/user1');
         $this->assertEquals($expected, $result);
-
     }
 
-    function testGetCards() {
-
+    public function testGetCards()
+    {
         $result = $this->backend->getCards(1);
 
         $expected = [
             [
-                'id'           => 1,
-                'uri'          => 'card1',
+                'id' => 1,
+                'uri' => 'card1',
                 'lastmodified' => 0,
-                'etag'         => '"' . md5('card1') . '"',
-                'size'         => 5
-            ]
+                'etag' => '"'.md5('card1').'"',
+                'size' => 5,
+            ],
         ];
 
         $this->assertEquals($expected, $result);
-
     }
 
-    function testGetCard() {
-
+    public function testGetCard()
+    {
         $result = $this->backend->getCard(1, 'card1');
 
         $expected = [
-            'id'           => 1,
-            'uri'          => 'card1',
-            'carddata'     => 'card1',
+            'id' => 1,
+            'uri' => 'card1',
+            'carddata' => 'card1',
             'lastmodified' => 0,
-            'etag'         => '"' . md5('card1') . '"',
-            'size'         => 5
+            'etag' => '"'.md5('card1').'"',
+            'size' => 5,
         ];
 
         if (is_resource($result['carddata'])) {
@@ -227,16 +218,15 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         }
 
         $this->assertEquals($expected, $result);
-
     }
 
     /**
      * @depends testGetCard
      */
-    function testCreateCard() {
-
+    public function testCreateCard()
+    {
         $result = $this->backend->createCard(1, 'card2', 'data2');
-        $this->assertEquals('"' . md5('data2') . '"', $result);
+        $this->assertEquals('"'.md5('data2').'"', $result);
         $result = $this->backend->getCard(1, 'card2');
         $this->assertEquals(2, $result['id']);
         $this->assertEquals('card2', $result['uri']);
@@ -244,33 +234,32 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $result['carddata'] = stream_get_contents($result['carddata']);
         }
         $this->assertEquals('data2', $result['carddata']);
-
     }
 
     /**
      * @depends testCreateCard
      */
-    function testGetMultiple() {
-
+    public function testGetMultiple()
+    {
         $result = $this->backend->createCard(1, 'card2', 'data2');
         $result = $this->backend->createCard(1, 'card3', 'data3');
         $check = [
             [
-                'id'           => 1,
-                'uri'          => 'card1',
-                'carddata'     => 'card1',
+                'id' => 1,
+                'uri' => 'card1',
+                'carddata' => 'card1',
                 'lastmodified' => 0,
             ],
             [
-                'id'           => 2,
-                'uri'          => 'card2',
-                'carddata'     => 'data2',
+                'id' => 2,
+                'uri' => 'card2',
+                'carddata' => 'data2',
                 'lastmodified' => time(),
             ],
             [
-                'id'           => 3,
-                'uri'          => 'card3',
-                'carddata'     => 'data3',
+                'id' => 3,
+                'uri' => 'card3',
+                'carddata' => 'data3',
                 'lastmodified' => time(),
             ],
         ];
@@ -278,40 +267,34 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $result = $this->backend->getMultipleCards(1, ['card1', 'card2', 'card3']);
 
         foreach ($check as $index => $node) {
-
             foreach ($node as $k => $v) {
-
                 $expected = $v;
                 $actual = $result[$index][$k];
 
                 switch ($k) {
-                    case 'lastmodified' :
+                    case 'lastmodified':
                         $this->assertInternalType('int', $actual);
                         break;
-                    case 'carddata' :
+                    case 'carddata':
                         if (is_resource($actual)) {
                             $actual = stream_get_contents($actual);
                         }
-                        // No break intended.
-                    default :
+                        // no break intended.
+                    default:
                         $this->assertEquals($expected, $actual);
                         break;
                 }
-
             }
-
         }
-
-
     }
 
     /**
      * @depends testGetCard
      */
-    function testUpdateCard() {
-
+    public function testUpdateCard()
+    {
         $result = $this->backend->updateCard(1, 'card1', 'newdata');
-        $this->assertEquals('"' . md5('newdata') . '"', $result);
+        $this->assertEquals('"'.md5('newdata').'"', $result);
 
         $result = $this->backend->getCard(1, 'card1');
         $this->assertEquals(1, $result['id']);
@@ -319,22 +302,20 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             $result['carddata'] = stream_get_contents($result['carddata']);
         }
         $this->assertEquals('newdata', $result['carddata']);
-
     }
 
     /**
      * @depends testGetCard
      */
-    function testDeleteCard() {
-
+    public function testDeleteCard()
+    {
         $this->backend->deleteCard(1, 'card1');
         $result = $this->backend->getCard(1, 'card1');
         $this->assertFalse($result);
-
     }
 
-    function testGetChanges() {
-
+    public function testGetChanges()
+    {
         $backend = $this->backend;
         $id = $backend->createAddressBook(
             'principals/user1',
@@ -345,29 +326,28 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals([
             'syncToken' => 1,
-            "added"     => [],
-            'modified'  => [],
-            'deleted'   => [],
+            'added' => [],
+            'modified' => [],
+            'deleted' => [],
         ], $result);
 
         $currentToken = $result['syncToken'];
 
         $dummyCard = "BEGIN:VCARD\r\nEND:VCARD\r\n";
 
-        $backend->createCard($id, "card1.ics", $dummyCard);
-        $backend->createCard($id, "card2.ics", $dummyCard);
-        $backend->createCard($id, "card3.ics", $dummyCard);
-        $backend->updateCard($id, "card1.ics", $dummyCard);
-        $backend->deleteCard($id, "card2.ics");
+        $backend->createCard($id, 'card1.ics', $dummyCard);
+        $backend->createCard($id, 'card2.ics', $dummyCard);
+        $backend->createCard($id, 'card3.ics', $dummyCard);
+        $backend->updateCard($id, 'card1.ics', $dummyCard);
+        $backend->deleteCard($id, 'card2.ics');
 
         $result = $backend->getChangesForAddressBook($id, $currentToken, 1);
 
         $this->assertEquals([
             'syncToken' => 6,
-            'modified'  => ["card1.ics"],
-            'deleted'   => ["card2.ics"],
-            "added"     => ["card3.ics"],
+            'modified' => ['card1.ics'],
+            'deleted' => ['card2.ics'],
+            'added' => ['card3.ics'],
         ], $result);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php
index 8638dc74a..f7e20fbfb 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php
@@ -1,29 +1,31 @@
 <?php
 
-namespace Sabre\CardDAV\Backend;
+declare(strict_types=1);
 
-class Mock extends AbstractBackend {
+namespace Sabre\CardDAV\Backend;
 
+class Mock extends AbstractBackend
+{
     public $addressBooks;
     public $cards;
 
-    function __construct($addressBooks = null, $cards = null) {
-
+    public function __construct($addressBooks = null, $cards = null)
+    {
         $this->addressBooks = $addressBooks;
         $this->cards = $cards;
 
         if (is_null($this->addressBooks)) {
             $this->addressBooks = [
                 [
-                    'id'                => 'foo',
-                    'uri'               => 'book1',
-                    'principaluri'      => 'principals/user1',
+                    'id' => 'foo',
+                    'uri' => 'book1',
+                    'principaluri' => 'principals/user1',
                     '{DAV:}displayname' => 'd-name',
                 ],
                 [
-                    'id'                => 'bar',
-                    'uri'               => 'book3',
-                    'principaluri'      => 'principals/user1',
+                    'id' => 'bar',
+                    'uri' => 'book3',
+                    'principaluri' => 'principals/user1',
                     '{DAV:}displayname' => 'd-name',
                 ],
             ];
@@ -41,20 +43,18 @@ class Mock extends AbstractBackend {
                 ],
             ];
         }
-
     }
 
-
-    function getAddressBooksForUser($principalUri) {
-
+    public function getAddressBooksForUser($principalUri)
+    {
         $books = [];
         foreach ($this->addressBooks as $book) {
             if ($book['principaluri'] === $principalUri) {
                 $books[] = $book;
             }
         }
-        return $books;
 
+        return $books;
     }
 
     /**
@@ -69,45 +69,43 @@ class Mock extends AbstractBackend {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param string $addressBookId
+     * @param string               $addressBookId
      * @param \Sabre\DAV\PropPatch $propPatch
-     * @return void
      */
-    function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
-
+    public function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch)
+    {
         foreach ($this->addressBooks as &$book) {
-            if ($book['id'] !== $addressBookId)
+            if ($book['id'] !== $addressBookId) {
                 continue;
+            }
 
-            $propPatch->handleRemaining(function($mutations) use (&$book) {
+            $propPatch->handleRemaining(function ($mutations) use (&$book) {
                 foreach ($mutations as $key => $value) {
                     $book[$key] = $value;
                 }
+
                 return true;
             });
-
         }
-
     }
 
-    function createAddressBook($principalUri, $url, array $properties) {
-
+    public function createAddressBook($principalUri, $url, array $properties)
+    {
         $this->addressBooks[] = array_merge($properties, [
-            'id'           => $url,
-            'uri'          => $url,
+            'id' => $url,
+            'uri' => $url,
             'principaluri' => $principalUri,
         ]);
-
     }
 
-    function deleteAddressBook($addressBookId) {
-
+    public function deleteAddressBook($addressBookId)
+    {
         foreach ($this->addressBooks as $key => $value) {
-            if ($value['id'] === $addressBookId)
+            if ($value['id'] === $addressBookId) {
                 unset($this->addressBooks[$key]);
+            }
         }
         unset($this->cards[$addressBookId]);
-
     }
 
     /**
@@ -127,28 +125,29 @@ class Mock extends AbstractBackend {
      * This may speed up certain requests, especially with large cards.
      *
      * @param mixed $addressBookId
+     *
      * @return array
      */
-    function getCards($addressBookId) {
-
+    public function getCards($addressBookId)
+    {
         $cards = [];
         foreach ($this->cards[$addressBookId] as $uri => $data) {
             if (is_resource($data)) {
                 $cards[] = [
-                    'uri'      => $uri,
+                    'uri' => $uri,
                     'carddata' => $data,
                 ];
             } else {
                 $cards[] = [
-                    'uri'      => $uri,
+                    'uri' => $uri,
                     'carddata' => $data,
-                    'etag'     => '"' . md5($data) . '"',
-                    'size'     => strlen($data)
+                    'etag' => '"'.md5($data).'"',
+                    'size' => strlen($data),
                 ];
             }
         }
-        return $cards;
 
+        return $cards;
     }
 
     /**
@@ -159,24 +158,25 @@ class Mock extends AbstractBackend {
      *
      * If the card does not exist, you must return false.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
+     *
      * @return array
      */
-    function getCard($addressBookId, $cardUri) {
-
+    public function getCard($addressBookId, $cardUri)
+    {
         if (!isset($this->cards[$addressBookId][$cardUri])) {
             return false;
         }
 
         $data = $this->cards[$addressBookId][$cardUri];
+
         return [
-            'uri'      => $cardUri,
+            'uri' => $cardUri,
             'carddata' => $data,
-            'etag'     => '"' . md5($data) . '"',
-            'size'     => strlen($data)
+            'etag' => '"'.md5($data).'"',
+            'size' => strlen($data),
         ];
-
     }
 
     /**
@@ -199,19 +199,20 @@ class Mock extends AbstractBackend {
      *
      * If you don't return an ETag, you can just return null.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
      * @param string $cardData
+     *
      * @return string|null
      */
-    function createCard($addressBookId, $cardUri, $cardData) {
-
+    public function createCard($addressBookId, $cardUri, $cardData)
+    {
         if (is_resource($cardData)) {
             $cardData = stream_get_contents($cardData);
         }
         $this->cards[$addressBookId][$cardUri] = $cardData;
-        return '"' . md5($cardData) . '"';
 
+        return '"'.md5($cardData).'"';
     }
 
     /**
@@ -234,25 +235,24 @@ class Mock extends AbstractBackend {
      *
      * If you don't return an ETag, you can just return null.
      *
-     * @param mixed $addressBookId
+     * @param mixed  $addressBookId
      * @param string $cardUri
      * @param string $cardData
+     *
      * @return string|null
      */
-    function updateCard($addressBookId, $cardUri, $cardData) {
-
+    public function updateCard($addressBookId, $cardUri, $cardData)
+    {
         if (is_resource($cardData)) {
             $cardData = stream_get_contents($cardData);
         }
         $this->cards[$addressBookId][$cardUri] = $cardData;
-        return '"' . md5($cardData) . '"';
 
+        return '"'.md5($cardData).'"';
     }
 
-    function deleteCard($addressBookId, $cardUri) {
-
+    public function deleteCard($addressBookId, $cardUri)
+    {
         unset($this->cards[$addressBookId][$cardUri]);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php
index c1b0e274e..718eec6be 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\CardDAV\Backend;
+declare(strict_types=1);
 
-class PDOMySQLTest extends AbstractPDOTest {
+namespace Sabre\CardDAV\Backend;
 
+class PDOMySQLTest extends AbstractPDOTest
+{
     public $driver = 'mysql';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php
index b187c4d78..b16a00ce2 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\CardDAV\Backend;
+declare(strict_types=1);
 
-class PDOSqliteTest extends AbstractPDOTest {
+namespace Sabre\CardDAV\Backend;
 
+class PDOSqliteTest extends AbstractPDOTest
+{
     public $driver = 'sqlite';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php
index cb7d152c3..41853aa63 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php
@@ -1,9 +1,11 @@
 <?php
 
-namespace Sabre\CardDAV;
+declare(strict_types=1);
 
-class CardTest extends \PHPUnit_Framework_TestCase {
+namespace Sabre\CardDAV;
 
+class CardTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var Sabre\CardDAV\Card
      */
@@ -13,140 +15,128 @@ class CardTest extends \PHPUnit_Framework_TestCase {
      */
     protected $backend;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->backend = new Backend\Mock();
         $this->card = new Card(
             $this->backend,
             [
-                'uri'          => 'book1',
-                'id'           => 'foo',
+                'uri' => 'book1',
+                'id' => 'foo',
                 'principaluri' => 'principals/user1',
             ],
             [
-                'uri'           => 'card1',
+                'uri' => 'card1',
                 'addressbookid' => 'foo',
-                'carddata'      => 'card',
+                'carddata' => 'card',
             ]
         );
-
     }
 
-    function testGet() {
-
+    public function testGet()
+    {
         $result = $this->card->get();
         $this->assertEquals('card', $result);
-
     }
-    function testGet2() {
 
+    public function testGet2()
+    {
         $this->card = new Card(
             $this->backend,
             [
-                'uri'          => 'book1',
-                'id'           => 'foo',
+                'uri' => 'book1',
+                'id' => 'foo',
                 'principaluri' => 'principals/user1',
             ],
             [
-                'uri'           => 'card1',
+                'uri' => 'card1',
                 'addressbookid' => 'foo',
             ]
         );
         $result = $this->card->get();
         $this->assertEquals("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD", $result);
-
     }
 
-
     /**
      * @depends testGet
      */
-    function testPut() {
-
+    public function testPut()
+    {
         $file = fopen('php://memory', 'r+');
         fwrite($file, 'newdata');
         rewind($file);
         $this->card->put($file);
         $result = $this->card->get();
         $this->assertEquals('newdata', $result);
-
     }
 
-
-    function testDelete() {
-
+    public function testDelete()
+    {
         $this->card->delete();
         $this->assertEquals(1, count($this->backend->cards['foo']));
-
     }
 
-    function testGetContentType() {
-
+    public function testGetContentType()
+    {
         $this->assertEquals('text/vcard; charset=utf-8', $this->card->getContentType());
-
     }
 
-    function testGetETag() {
-
-        $this->assertEquals('"' . md5('card') . '"', $this->card->getETag());
-
+    public function testGetETag()
+    {
+        $this->assertEquals('"'.md5('card').'"', $this->card->getETag());
     }
 
-    function testGetETag2() {
-
+    public function testGetETag2()
+    {
         $card = new Card(
             $this->backend,
             [
-                'uri'          => 'book1',
-                'id'           => 'foo',
+                'uri' => 'book1',
+                'id' => 'foo',
                 'principaluri' => 'principals/user1',
             ],
             [
-                'uri'           => 'card1',
+                'uri' => 'card1',
                 'addressbookid' => 'foo',
-                'carddata'      => 'card',
-                'etag'          => '"blabla"',
+                'carddata' => 'card',
+                'etag' => '"blabla"',
             ]
         );
         $this->assertEquals('"blabla"', $card->getETag());
-
     }
 
-    function testGetLastModified() {
-
+    public function testGetLastModified()
+    {
         $this->assertEquals(null, $this->card->getLastModified());
-
     }
 
-    function testGetSize() {
-
+    public function testGetSize()
+    {
         $this->assertEquals(4, $this->card->getSize());
         $this->assertEquals(4, $this->card->getSize());
-
     }
 
-    function testGetSize2() {
-
+    public function testGetSize2()
+    {
         $card = new Card(
             $this->backend,
             [
-                'uri'          => 'book1',
-                'id'           => 'foo',
+                'uri' => 'book1',
+                'id' => 'foo',
                 'principaluri' => 'principals/user1',
             ],
             [
-                'uri'           => 'card1',
+                'uri' => 'card1',
                 'addressbookid' => 'foo',
-                'etag'          => '"blabla"',
-                'size'          => 4,
+                'etag' => '"blabla"',
+                'size' => 4,
             ]
         );
         $this->assertEquals(4, $card->getSize());
-
     }
 
-    function testACLMethods() {
-
+    public function testACLMethods()
+    {
         $this->assertEquals('principals/user1', $this->card->getOwner());
         $this->assertNull($this->card->getGroup());
         $this->assertEquals([
@@ -156,22 +146,22 @@ class CardTest extends \PHPUnit_Framework_TestCase {
                 'protected' => true,
             ],
         ], $this->card->getACL());
-
     }
-    function testOverrideACL() {
 
+    public function testOverrideACL()
+    {
         $card = new Card(
             $this->backend,
             [
-                'uri'          => 'book1',
-                'id'           => 'foo',
+                'uri' => 'book1',
+                'id' => 'foo',
                 'principaluri' => 'principals/user1',
             ],
             [
-                'uri'           => 'card1',
+                'uri' => 'card1',
                 'addressbookid' => 'foo',
-                'carddata'      => 'card',
-                'acl'           => [
+                'carddata' => 'card',
+                'acl' => [
                     [
                         'privilege' => '{DAV:}read',
                         'principal' => 'principals/user1',
@@ -187,24 +177,20 @@ class CardTest extends \PHPUnit_Framework_TestCase {
                 'protected' => true,
             ],
         ], $card->getACL());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetACL() {
-
-       $this->card->setACL([]);
-
+    public function testSetACL()
+    {
+        $this->card->setACL([]);
     }
 
-    function testGetSupportedPrivilegeSet() {
-
+    public function testGetSupportedPrivilegeSet()
+    {
         $this->assertNull(
             $this->card->getSupportedPrivilegeSet()
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php
index 4796a131f..760749f6c 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php
@@ -1,15 +1,17 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 
-class IDirectoryTest extends \PHPUnit_Framework_TestCase {
-
-    function testResourceType() {
-
+class IDirectoryTest extends \PHPUnit\Framework\TestCase
+{
+    public function testResourceType()
+    {
         $tree = [
-            new DirectoryMock('directory')
+            new DirectoryMock('directory'),
         ];
 
         $server = new DAV\Server($tree);
@@ -17,14 +19,10 @@ class IDirectoryTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($plugin);
 
         $props = $server->getProperties('directory', ['{DAV:}resourcetype']);
-        $this->assertTrue($props['{DAV:}resourcetype']->is('{' . Plugin::NS_CARDDAV . '}directory'));
-
+        $this->assertTrue($props['{DAV:}resourcetype']->is('{'.Plugin::NS_CARDDAV.'}directory'));
     }
-
 }
 
-class DirectoryMock extends DAV\SimpleCollection implements IDirectory {
-
-
-
+class DirectoryMock extends DAV\SimpleCollection implements IDirectory
+{
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php
index 2d57c6ae7..4e3276ed3 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
@@ -7,13 +9,13 @@ use Sabre\HTTP;
 
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class MultiGetTest extends AbstractPluginTest {
-
-    function testMultiGet() {
-
+class MultiGetTest extends AbstractPluginTest
+{
+    public function testMultiGet()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI'    => '/addressbooks/user1/book1',
+            'REQUEST_URI' => '/addressbooks/user1/book1',
         ]);
 
         $request->setBody(
@@ -34,7 +36,7 @@ class MultiGetTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
@@ -44,19 +46,18 @@ class MultiGetTest extends AbstractPluginTest {
         $this->assertEquals([
             '/addressbooks/user1/book1/card1' => [
                 200 => [
-                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD").'"',
                     '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD",
-                ]
-            ]
+                ],
+            ],
         ], $result);
-
     }
 
-    function testMultiGetVCard4() {
-
+    public function testMultiGetVCard4()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI'    => '/addressbooks/user1/book1',
+            'REQUEST_URI' => '/addressbooks/user1/book1',
         ]);
 
         $request->setBody(
@@ -77,23 +78,22 @@ class MultiGetTest extends AbstractPluginTest {
 
         $this->server->exec();
 
-        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
+        $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:'.$response->body);
 
         // using the client for parsing
         $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
-        $prodId = "PRODID:-//Sabre//Sabre VObject " . \Sabre\VObject\Version::VERSION . "//EN";
+        $prodId = 'PRODID:-//Sabre//Sabre VObject '.\Sabre\VObject\Version::VERSION.'//EN';
 
         $this->assertEquals([
             '/addressbooks/user1/book1/card1' => [
                 200 => [
-                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                    '{DAV:}getetag' => '"'.md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD").'"',
                     '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\r\nVERSION:4.0\r\n$prodId\r\nUID:12345\r\nEND:VCARD\r\n",
-                ]
-            ]
+                ],
+            ],
         ], $result);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php
index 6962e7830..b5a68dc48 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php
@@ -1,102 +1,101 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 
-class PluginTest extends AbstractPluginTest {
-
-    function testConstruct() {
-
-        $this->assertEquals('{' . Plugin::NS_CARDDAV . '}addressbook', $this->server->resourceTypeMapping['Sabre\\CardDAV\\IAddressBook']);
+class PluginTest extends AbstractPluginTest
+{
+    public function testConstruct()
+    {
+        $this->assertEquals('{'.Plugin::NS_CARDDAV.'}addressbook', $this->server->resourceTypeMapping['Sabre\\CardDAV\\IAddressBook']);
 
         $this->assertTrue(in_array('addressbook', $this->plugin->getFeatures()));
         $this->assertEquals('carddav', $this->plugin->getPluginInfo()['name']);
-
     }
 
-    function testSupportedReportSet() {
-
+    public function testSupportedReportSet()
+    {
         $this->assertEquals([
-            '{' . Plugin::NS_CARDDAV . '}addressbook-multiget',
-            '{' . Plugin::NS_CARDDAV . '}addressbook-query',
+            '{'.Plugin::NS_CARDDAV.'}addressbook-multiget',
+            '{'.Plugin::NS_CARDDAV.'}addressbook-query',
         ], $this->plugin->getSupportedReportSet('addressbooks/user1/book1'));
-
     }
 
-    function testSupportedReportSetEmpty() {
-
+    public function testSupportedReportSetEmpty()
+    {
         $this->assertEquals([
         ], $this->plugin->getSupportedReportSet(''));
-
     }
 
-    function testAddressBookHomeSet() {
-
-        $result = $this->server->getProperties('principals/user1', ['{' . Plugin::NS_CARDDAV . '}addressbook-home-set']);
+    public function testAddressBookHomeSet()
+    {
+        $result = $this->server->getProperties('principals/user1', ['{'.Plugin::NS_CARDDAV.'}addressbook-home-set']);
 
         $this->assertEquals(1, count($result));
-        $this->assertTrue(isset($result['{' . Plugin::NS_CARDDAV . '}addressbook-home-set']));
-        $this->assertEquals('addressbooks/user1/', $result['{' . Plugin::NS_CARDDAV . '}addressbook-home-set']->getHref());
-
+        $this->assertTrue(isset($result['{'.Plugin::NS_CARDDAV.'}addressbook-home-set']));
+        $this->assertEquals('addressbooks/user1/', $result['{'.Plugin::NS_CARDDAV.'}addressbook-home-set']->getHref());
     }
 
-    function testDirectoryGateway() {
-
-        $result = $this->server->getProperties('principals/user1', ['{' . Plugin::NS_CARDDAV . '}directory-gateway']);
+    public function testDirectoryGateway()
+    {
+        $result = $this->server->getProperties('principals/user1', ['{'.Plugin::NS_CARDDAV.'}directory-gateway']);
 
         $this->assertEquals(1, count($result));
-        $this->assertTrue(isset($result['{' . Plugin::NS_CARDDAV . '}directory-gateway']));
-        $this->assertEquals(['directory'], $result['{' . Plugin::NS_CARDDAV . '}directory-gateway']->getHrefs());
-
+        $this->assertTrue(isset($result['{'.Plugin::NS_CARDDAV.'}directory-gateway']));
+        $this->assertEquals(['directory'], $result['{'.Plugin::NS_CARDDAV.'}directory-gateway']->getHrefs());
     }
 
-    function testReportPassThrough() {
-
+    public function testReportPassThrough()
+    {
         $this->assertNull($this->plugin->report('{DAV:}foo', new \DomDocument(), ''));
-
     }
 
-    function testHTMLActionsPanel() {
-
+    public function testHTMLActionsPanel()
+    {
         $output = '';
         $r = $this->server->emit('onHTMLActionsPanel', [$this->server->tree->getNodeForPath('addressbooks/user1'), &$output]);
         $this->assertFalse($r);
 
-        $this->assertTrue(!!strpos($output, 'Display name'));
-
+        $this->assertTrue((bool) strpos($output, 'Display name'));
     }
 
-    function testAddressbookPluginProperties() {
-
-        $ns = '{' . Plugin::NS_CARDDAV . '}';
+    public function testAddressbookPluginProperties()
+    {
+        $ns = '{'.Plugin::NS_CARDDAV.'}';
         $propFind = new DAV\PropFind('addressbooks/user1/book1', [
-            $ns . 'supported-address-data',
-            $ns . 'supported-collation-set',
+            $ns.'supported-address-data',
+            $ns.'supported-collation-set',
         ]);
         $node = $this->server->tree->getNodeForPath('addressbooks/user1/book1');
         $this->plugin->propFindEarly($propFind, $node);
 
         $this->assertInstanceOf(
             'Sabre\\CardDAV\\Xml\\Property\\SupportedAddressData',
-            $propFind->get($ns . 'supported-address-data')
+            $propFind->get($ns.'supported-address-data')
         );
         $this->assertInstanceOf(
             'Sabre\\CardDAV\\Xml\\Property\\SupportedCollationSet',
-            $propFind->get($ns . 'supported-collation-set')
+            $propFind->get($ns.'supported-collation-set')
         );
-
-
     }
 
-    function testGetTransform() {
-
-        $request = new \Sabre\HTTP\Request('GET', '/addressbooks/user1/book1/card1', ['Accept: application/vcard+json']);
+    public function testGetTransform()
+    {
+        $request = new \Sabre\HTTP\Request('GET', '/addressbooks/user1/book1/card1', ['Accept' => 'application/vcard+json']);
         $response = new \Sabre\HTTP\ResponseMock();
         $this->server->invokeMethod($request, $response);
 
         $this->assertEquals(200, $response->getStatus());
-
     }
 
+    public function testGetWithoutContentType()
+    {
+        $request = new \Sabre\HTTP\Request('GET', '/');
+        $response = new \Sabre\HTTP\ResponseMock();
+        $this->plugin->httpAfterGet($request, $response);
+        $this->assertTrue(true);
+    }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php
index d4bc48098..8d045569c 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php
@@ -1,17 +1,19 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV\PropFind;
 use Sabre\HTTP;
 
-class SogoStripContentTypeTest extends \Sabre\DAVServerTest {
-
+class SogoStripContentTypeTest extends \Sabre\DAVServerTest
+{
     protected $setupCardDAV = true;
     protected $carddavAddressBooks = [
         [
-            'id'           => 1,
-            'uri'          => 'book1',
+            'id' => 1,
+            'uri' => 'book1',
             'principaluri' => 'principals/user1',
         ],
     ];
@@ -21,27 +23,27 @@ class SogoStripContentTypeTest extends \Sabre\DAVServerTest {
         ],
     ];
 
-    function testDontStrip() {
-
+    public function testDontStrip()
+    {
         $result = $this->server->getProperties('addressbooks/user1/book1/card1.vcf', ['{DAV:}getcontenttype']);
         $this->assertEquals([
-            '{DAV:}getcontenttype' => 'text/vcard; charset=utf-8'
+            '{DAV:}getcontenttype' => 'text/vcard; charset=utf-8',
         ], $result);
-
     }
-    function testStrip() {
 
-        $this->server->httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_USER_AGENT' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 Lightning/1.2.1',
+    public function testStrip()
+    {
+        $this->server->httpRequest = new HTTP\Request('GET', '/', [
+            'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 Lightning/1.2.1',
         ]);
         $result = $this->server->getProperties('addressbooks/user1/book1/card1.vcf', ['{DAV:}getcontenttype']);
         $this->assertEquals([
-            '{DAV:}getcontenttype' => 'text/x-vcard'
+            '{DAV:}getcontenttype' => 'text/x-vcard',
         ], $result);
-
     }
-    function testDontTouchOtherMimeTypes() {
 
+    public function testDontTouchOtherMimeTypes()
+    {
         $this->server->httpRequest = new HTTP\Request('GET', '/addressbooks/user1/book1/card1.vcf', [
             'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 Lightning/1.2.1',
         ]);
@@ -50,7 +52,16 @@ class SogoStripContentTypeTest extends \Sabre\DAVServerTest {
         $propFind->set('{DAV:}getcontenttype', 'text/plain');
         $this->carddavPlugin->propFindLate($propFind, new \Sabre\DAV\SimpleCollection('foo'));
         $this->assertEquals('text/plain', $propFind->get('{DAV:}getcontenttype'));
-
     }
 
+    public function testStripWithoutGetContentType()
+    {
+        $this->server->httpRequest = new HTTP\Request('GET', '/addressbooks/user1/book1/card1.vcf', [
+            'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 Lightning/1.2.1',
+        ]);
+
+        $propFind = new PropFind('hello', ['{DAV:}getcontenttype']);
+        $this->carddavPlugin->propFindLate($propFind, new \Sabre\DAV\SimpleCollection('foo'));
+        $this->assertEquals(null, $propFind->get('{DAV:}getcontenttype')); // Property not present
+    }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php b/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php
index ec8a3501e..0bdf07df5 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php
@@ -1,18 +1,20 @@
 <?php
 
-namespace Sabre\CardDAV;
-
-class TestUtil {
+declare(strict_types=1);
 
-    static function getBackend() {
+namespace Sabre\CardDAV;
 
+class TestUtil
+{
+    public static function getBackend()
+    {
         $backend = new Backend\PDO(self::getSQLiteDB());
-        return $backend;
 
+        return $backend;
     }
 
-    static function getSQLiteDB() {
-
+    public static function getSQLiteDB()
+    {
         $pdo = Backend\PDOSqliteTest::getSQLite();
 
         // Inserting events through a backend class.
@@ -21,7 +23,7 @@ class TestUtil {
             'principals/user1',
             'UUID-123467',
             [
-                '{DAV:}displayname'                                       => 'user1 addressbook',
+                '{DAV:}displayname' => 'user1 addressbook',
                 '{urn:ietf:params:xml:ns:carddav}addressbook-description' => 'AddressBook description',
             ]
         );
@@ -29,22 +31,23 @@ class TestUtil {
             'principals/user1',
             'UUID-123468',
             [
-                '{DAV:}displayname'                                       => 'user1 addressbook2',
+                '{DAV:}displayname' => 'user1 addressbook2',
                 '{urn:ietf:params:xml:ns:carddav}addressbook-description' => 'AddressBook description',
             ]
         );
         $backend->createCard($addressbookId, 'UUID-2345', self::getTestCardData());
-        return $pdo;
 
+        return $pdo;
     }
 
-    static function deleteSQLiteDB() {
+    public static function deleteSQLiteDB()
+    {
         $sqliteTest = new Backend\PDOSqliteTest();
         $pdo = $sqliteTest->tearDown();
     }
 
-    static function getTestCardData() {
-
+    public static function getTestCardData()
+    {
         $addressbookData = 'BEGIN:VCARD
 VERSION:3.0
 PRODID:-//Acme Inc.//RoadRunner 1.0//EN
@@ -56,7 +59,5 @@ REV:2012-06-20T07:00:39+00:00
 END:VCARD';
 
         return $addressbookData;
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php
index 82d82fadd..d8acc3c14 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php
@@ -1,43 +1,44 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\HTTP;
 
-class VCFExportTest extends \Sabre\DAVServerTest {
-
+class VCFExportTest extends \Sabre\DAVServerTest
+{
     protected $setupCardDAV = true;
     protected $autoLogin = 'user1';
     protected $setupACL = true;
 
     protected $carddavAddressBooks = [
         [
-            'id'           => 'book1',
-            'uri'          => 'book1',
+            'id' => 'book1',
+            'uri' => 'book1',
             'principaluri' => 'principals/user1',
-        ]
+        ],
     ];
     protected $carddavCards = [
         'book1' => [
-            "card1" => "BEGIN:VCARD\r\nFN:Person1\r\nEND:VCARD\r\n",
-            "card2" => "BEGIN:VCARD\r\nFN:Person2\r\nEND:VCARD",
-            "card3" => "BEGIN:VCARD\r\nFN:Person3\r\nEND:VCARD\r\n",
-            "card4" => "BEGIN:VCARD\nFN:Person4\nEND:VCARD\n",
-        ]
+            'card1' => "BEGIN:VCARD\r\nFN:Person1\r\nEND:VCARD\r\n",
+            'card2' => "BEGIN:VCARD\r\nFN:Person2\r\nEND:VCARD",
+            'card3' => "BEGIN:VCARD\r\nFN:Person3\r\nEND:VCARD\r\n",
+            'card4' => "BEGIN:VCARD\nFN:Person4\nEND:VCARD\n",
+        ],
     ];
 
-    function setUp() {
-
+    public function setUp()
+    {
         parent::setUp();
         $plugin = new VCFExportPlugin();
         $this->server->addPlugin(
             $plugin
         );
-
     }
 
-    function testSimple() {
-
+    public function testSimple()
+    {
         $plugin = $this->server->getPlugin('vcf-export');
         $this->assertInstanceOf('Sabre\\CardDAV\\VCFExportPlugin', $plugin);
 
@@ -45,21 +46,20 @@ class VCFExportTest extends \Sabre\DAVServerTest {
             'vcf-export',
             $plugin->getPluginInfo()['name']
         );
-
     }
 
-    function testExport() {
-
+    public function testExport()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI'    => '/addressbooks/user1/book1?export',
-            'QUERY_STRING'   => 'export',
+            'REQUEST_URI' => '/addressbooks/user1/book1?export',
+            'QUERY_STRING' => 'export',
             'REQUEST_METHOD' => 'GET',
         ]);
 
         $response = $this->request($request);
         $this->assertEquals(200, $response->status, $response->body);
 
-        $expected = "BEGIN:VCARD
+        $expected = 'BEGIN:VCARD
 FN:Person1
 END:VCARD
 BEGIN:VCARD
@@ -71,26 +71,24 @@ END:VCARD
 BEGIN:VCARD
 FN:Person4
 END:VCARD
-";
+';
         // We actually expected windows line endings
         $expected = str_replace("\n", "\r\n", $expected);
 
         $this->assertEquals($expected, $response->body);
-
     }
 
-    function testBrowserIntegration() {
-
+    public function testBrowserIntegration()
+    {
         $plugin = $this->server->getPlugin('vcf-export');
         $actions = '';
         $addressbook = new AddressBook($this->carddavBackend, []);
         $this->server->emit('browserButtonActions', ['/foo', $addressbook, &$actions]);
         $this->assertContains('/foo?export', $actions);
-
     }
 
-    function testContentDisposition() {
-
+    public function testContentDisposition()
+    {
         $request = new HTTP\Request(
             'GET',
             '/addressbooks/user1/book1?export'
@@ -99,14 +97,13 @@ END:VCARD
         $response = $this->request($request, 200);
         $this->assertEquals('text/directory', $response->getHeader('Content-Type'));
         $this->assertEquals(
-            'attachment; filename="book1-' . date('Y-m-d') . '.vcf"',
+            'attachment; filename="book1-'.date('Y-m-d').'.vcf"',
             $response->getHeader('Content-Disposition')
         );
-
     }
 
-    function testContentDispositionBadChars() {
-
+    public function testContentDispositionBadChars()
+    {
         $this->carddavBackend->createAddressBook(
             'principals/user1',
             'book-b_ad"(ch)ars',
@@ -126,10 +123,8 @@ END:VCARD
         $response = $this->request($request, 200);
         $this->assertEquals('text/directory', $response->getHeader('Content-Type'));
         $this->assertEquals(
-            'attachment; filename="book-b_adchars-' . date('Y-m-d') . '.vcf"',
+            'attachment; filename="book-b_adchars-'.date('Y-m-d').'.vcf"',
             $response->getHeader('Content-Disposition')
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php
index 03c468f86..753efc73d 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php
@@ -1,31 +1,32 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 require_once 'Sabre/CardDAV/AbstractPluginTest.php';
 
-class ValidateFilterTest extends AbstractPluginTest {
-
+class ValidateFilterTest extends AbstractPluginTest
+{
     /**
-     * @param string $input
-     * @param array $filters
-     * @param string $test
-     * @param bool $result
+     * @param string      $input
+     * @param array       $filters
+     * @param string      $test
+     * @param bool        $result
      * @param string|null $message
      * @dataProvider data
      */
-    function testFilter($input, $filters, $test, $result, $message = null) {
-
+    public function testFilter($input, $filters, $test, $result, $message = null)
+    {
         if ($result) {
             $this->assertTrue($this->plugin->validateFilters($input, $filters, $test), $message);
         } else {
             $this->assertFalse($this->plugin->validateFilters($input, $filters, $test), $message);
         }
-
     }
 
-    function data() {
-
+    public function data()
+    {
         $body1 = <<<HELLO
 BEGIN:VCARD
 VERSION:3.0
@@ -70,14 +71,14 @@ HELLO;
         // Check if TEL[TYPE] is defined
         $filter5 =
             [
-                'name'           => 'tel',
+                'name' => 'tel',
                 'is-not-defined' => false,
-                'test'           => 'anyof',
-                'param-filters'  => [
+                'test' => 'anyof',
+                'param-filters' => [
                     [
-                        'name'           => 'type',
+                        'name' => 'type',
                         'is-not-defined' => false,
-                        'text-match'     => null
+                        'text-match' => null,
                     ],
                 ],
                 'text-matches' => [],
@@ -107,16 +108,16 @@ HELLO;
         // Check if URL contains 'google'
         $filter11 =
             [
-                'name'           => 'url',
+                'name' => 'url',
                 'is-not-defined' => false,
-                'test'           => 'anyof',
-                'param-filters'  => [],
-                'text-matches'   => [
+                'test' => 'anyof',
+                'param-filters' => [],
+                'text-matches' => [
                     [
-                        'match-type'       => 'contains',
-                        'value'            => 'google',
+                        'match-type' => 'contains',
+                        'value' => 'google',
                         'negate-condition' => false,
-                        'collation'        => 'i;octet',
+                        'collation' => 'i;octet',
                     ],
                 ],
             ];
@@ -137,22 +138,21 @@ HELLO;
         // Param filter with text
         $filter15 = $filter5;
         $filter15['param-filters'][0]['text-match'] = [
-            'match-type'       => 'contains',
-            'value'            => 'WORK',
-            'collation'        => 'i;octet',
+            'match-type' => 'contains',
+            'value' => 'WORK',
+            'collation' => 'i;octet',
             'negate-condition' => false,
         ];
         $filter16 = $filter15;
         $filter16['param-filters'][0]['text-match']['negate-condition'] = true;
 
-
         // Param filter + text filter
         $filter17 = $filter5;
         $filter17['test'] = 'anyof';
         $filter17['text-matches'][] = [
-            'match-type'       => 'contains',
-            'value'            => '444',
-            'collation'        => 'i;octet',
+            'match-type' => 'contains',
+            'value' => '444',
+            'collation' => 'i;octet',
             'negate-condition' => false,
         ];
 
@@ -162,20 +162,19 @@ HELLO;
         $filter18['test'] = 'allof';
 
         return [
-
             // Basic filters
-            [$body1, [$filter1], 'anyof',true],
-            [$body1, [$filter2], 'anyof',false],
-            [$body1, [$filter3], 'anyof',false],
-            [$body1, [$filter4], 'anyof',true],
+            [$body1, [$filter1], 'anyof', true],
+            [$body1, [$filter2], 'anyof', false],
+            [$body1, [$filter3], 'anyof', false],
+            [$body1, [$filter4], 'anyof', true],
 
             // Combinations
-            [$body1, [$filter1, $filter2], 'anyof',true],
-            [$body1, [$filter1, $filter2], 'allof',false],
-            [$body1, [$filter1, $filter4], 'anyof',true],
-            [$body1, [$filter1, $filter4], 'allof',true],
-            [$body1, [$filter2, $filter3], 'anyof',false],
-            [$body1, [$filter2, $filter3], 'allof',false],
+            [$body1, [$filter1, $filter2], 'anyof', true],
+            [$body1, [$filter1, $filter2], 'allof', false],
+            [$body1, [$filter1, $filter4], 'anyof', true],
+            [$body1, [$filter1, $filter4], 'allof', true],
+            [$body1, [$filter2, $filter3], 'anyof', false],
+            [$body1, [$filter2, $filter3], 'allof', false],
 
             // Basic parameters
             [$body1, [$filter5], 'anyof', true, 'TEL;TYPE is defined, so this should return true'],
@@ -203,7 +202,5 @@ HELLO;
             [$body1, [$filter18], 'anyof', false],
             [$body1, [$filter18], 'anyof', false],
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php
index acba2cfc8..2317b86cc 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
@@ -8,19 +10,19 @@ use Sabre\HTTP;
 
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
-
+class ValidateVCardTest extends \PHPUnit\Framework\TestCase
+{
     protected $server;
     protected $cardBackend;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $addressbooks = [
             [
-                'id'           => 'addressbook1',
+                'id' => 'addressbook1',
                 'principaluri' => 'principals/admin',
-                'uri'          => 'addressbook1',
-            ]
+                'uri' => 'addressbook1',
+            ],
         ];
 
         $this->cardBackend = new Backend\Mock($addressbooks, []);
@@ -39,21 +41,19 @@ class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
 
         $response = new HTTP\ResponseMock();
         $this->server->httpResponse = $response;
-
     }
 
-    function request(HTTP\Request $request, $expectedStatus = null) {
-
+    public function request(HTTP\Request $request, $expectedStatus = null)
+    {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         if ($expectedStatus) {
-
             $realStatus = $this->server->httpResponse->getStatus();
 
             $msg = '';
             if ($realStatus !== $expectedStatus) {
-                $msg = 'Response body: ' . $this->server->httpResponse->getBodyAsString();
+                $msg = 'Response body: '.$this->server->httpResponse->getBodyAsString();
             }
             $this->assertEquals(
                 $expectedStatus,
@@ -63,24 +63,22 @@ class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
         }
 
         return $this->server->httpResponse;
-
     }
 
-    function testCreateFile() {
-
+    public function testCreateFile()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/addressbooks/admin/addressbook1/blabla.vcf',
+            'REQUEST_URI' => '/addressbooks/admin/addressbook1/blabla.vcf',
         ]);
 
         $response = $this->request($request);
 
         $this->assertEquals(415, $response->status);
-
     }
 
-    function testCreateFileValid() {
-
+    public function testCreateFileValid()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/addressbooks/admin/addressbook1/blabla.vcf'
@@ -104,20 +102,18 @@ VCF;
         );
         // Valid, non-auto-fixed responses should contain an ETag.
         $this->assertTrue(
-            $response->getHeader('ETag') !== null,
+            null !== $response->getHeader('ETag'),
             'We did not receive an etag'
         );
 
-
         $expected = [
-            'uri'      => 'blabla.vcf',
+            'uri' => 'blabla.vcf',
             'carddata' => $vcard,
-            'size'     => strlen($vcard),
-            'etag'     => '"' . md5($vcard) . '"',
+            'size' => strlen($vcard),
+            'etag' => '"'.md5($vcard).'"',
         ];
 
         $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1', 'blabla.vcf'));
-
     }
 
     /**
@@ -126,8 +122,8 @@ VCF;
      *
      * @depends testCreateFileValid
      */
-    function testCreateVCardAutoFix() {
-
+    public function testCreateVCardAutoFix()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/addressbooks/admin/addressbook1/blabla.vcf'
@@ -168,14 +164,13 @@ END:VCARD\r
 VCF;
 
         $expected = [
-            'uri'      => 'blabla.vcf',
+            'uri' => 'blabla.vcf',
             'carddata' => $expectedVCard,
-            'size'     => strlen($expectedVCard),
-            'etag'     => '"' . md5($expectedVCard) . '"',
+            'size' => strlen($expectedVCard),
+            'etag' => '"'.md5($expectedVCard).'"',
         ];
 
         $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1', 'blabla.vcf'));
-
     }
 
     /**
@@ -187,8 +182,8 @@ VCF;
      *
      * @depends testCreateFileValid
      */
-    function testCreateVCardStrictFail() {
-
+    public function testCreateVCardStrictFail()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/addressbooks/admin/addressbook1/blabla.vcf',
@@ -209,11 +204,10 @@ VCF;
 
         $request->setBody($vcard);
         $this->request($request, 415);
-
     }
 
-    function testCreateFileNoUID() {
-
+    public function testCreateFileNoUID()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/addressbooks/admin/addressbook1/blabla.vcf'
@@ -231,13 +225,13 @@ VCF;
 
         $foo = $this->cardBackend->getCard('addressbook1', 'blabla.vcf');
         $this->assertTrue(
-            strpos($foo['carddata'], 'UID') !== false,
+            false !== strpos($foo['carddata'], 'UID'),
             print_r($foo, true)
         );
     }
 
-    function testCreateFileJson() {
-
+    public function testCreateFileJson()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/addressbooks/admin/addressbook1/blabla.vcf'
@@ -246,29 +240,27 @@ VCF;
 
         $response = $this->request($request);
 
-        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
 
         $foo = $this->cardBackend->getCard('addressbook1', 'blabla.vcf');
         $this->assertEquals("BEGIN:VCARD\r\nVERSION:4.0\r\nUID:foo\r\nFN:FirstName LastName\r\nEND:VCARD\r\n", $foo['carddata']);
-
     }
 
-    function testCreateFileVCalendar() {
-
+    public function testCreateFileVCalendar()
+    {
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/addressbooks/admin/addressbook1/blabla.vcf',
+            'REQUEST_URI' => '/addressbooks/admin/addressbook1/blabla.vcf',
         ]);
         $request->setBody("BEGIN:VCALENDAR\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: '.$response->body);
     }
 
-    function testUpdateFile() {
-
+    public function testUpdateFile()
+    {
         $this->cardBackend->createCard('addressbook1', 'blabla.vcf', 'foo');
         $request = new HTTP\Request(
             'PUT',
@@ -276,11 +268,10 @@ VCF;
         );
 
         $response = $this->request($request, 415);
-
     }
 
-    function testUpdateFileParsableBody() {
-
+    public function testUpdateFileParsableBody()
+    {
         $this->cardBackend->createCard('addressbook1', 'blabla.vcf', 'foo');
         $request = new HTTP\Request(
             'PUT',
@@ -293,13 +284,12 @@ VCF;
         $response = $this->request($request, 204);
 
         $expected = [
-            'uri'      => 'blabla.vcf',
+            'uri' => 'blabla.vcf',
             'carddata' => $body,
-            'size'     => strlen($body),
-            'etag'     => '"' . md5($body) . '"',
+            'size' => strlen($body),
+            'etag' => '"'.md5($body).'"',
         ];
 
         $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1', 'blabla.vcf'));
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php b/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php
index 6a8d389a0..5f5d666f9 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
-abstract class AbstractServer extends \PHPUnit_Framework_TestCase {
-
+abstract class AbstractServer extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var Sabre\HTTP\ResponseMock
      */
@@ -17,48 +19,44 @@ abstract class AbstractServer extends \PHPUnit_Framework_TestCase {
     protected $server;
     protected $tempDir = SABRE_TEMPDIR;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->response = new HTTP\ResponseMock();
         $this->server = new Server($this->getRootNode());
         $this->server->sapi = new HTTP\SapiMock();
         $this->server->httpResponse = $this->response;
         $this->server->debugExceptions = true;
         $this->deleteTree(SABRE_TEMPDIR, false);
-        file_put_contents(SABRE_TEMPDIR . '/test.txt', 'Test contents');
-        mkdir(SABRE_TEMPDIR . '/dir');
-        file_put_contents(SABRE_TEMPDIR . '/dir/child.txt', 'Child contents');
-
-
+        file_put_contents(SABRE_TEMPDIR.'/test.txt', 'Test contents');
+        mkdir(SABRE_TEMPDIR.'/dir');
+        file_put_contents(SABRE_TEMPDIR.'/dir/child.txt', 'Child contents');
     }
 
-    function tearDown() {
-
+    public function tearDown()
+    {
         $this->deleteTree(SABRE_TEMPDIR, false);
-
     }
 
-    protected function getRootNode() {
-
+    protected function getRootNode()
+    {
         return new FS\Directory(SABRE_TEMPDIR);
-
     }
 
-    private function deleteTree($path, $deleteRoot = true) {
-
+    private function deleteTree($path, $deleteRoot = true)
+    {
         foreach (scandir($path) as $node) {
-
-            if ($node == '.' || $node == '.svn' || $node == '..') continue;
-            $myPath = $path . '/' . $node;
+            if ('.' == $node || '.svn' == $node || '..' == $node) {
+                continue;
+            }
+            $myPath = $path.'/'.$node;
             if (is_file($myPath)) {
                 unlink($myPath);
             } else {
                 $this->deleteTree($myPath);
             }
-
         }
-        if ($deleteRoot) rmdir($path);
-
+        if ($deleteRoot) {
+            rmdir($path);
+        }
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php
index 917f5ec3f..ebc1e3f7b 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php
@@ -1,14 +1,16 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\HTTP;
 
-class AbstractBasicTest extends \PHPUnit_Framework_TestCase {
-
-    function testCheckNoHeaders() {
-
-        $request = new HTTP\Request();
+class AbstractBasicTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCheckNoHeaders()
+    {
+        $request = new HTTP\Request('GET', '/');
         $response = new HTTP\Response();
 
         $backend = new AbstractBasicMock();
@@ -16,14 +18,15 @@ class AbstractBasicTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse(
             $backend->check($request, $response)[0]
         );
-
     }
 
-    function testCheckUnknownUser() {
-
+    public function testCheckUnknownUser()
+    {
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'PHP_AUTH_USER' => 'username',
-            'PHP_AUTH_PW'   => 'wrongpassword',
+            'PHP_AUTH_PW' => 'wrongpassword',
         ]);
         $response = new HTTP\Response();
 
@@ -32,14 +35,15 @@ class AbstractBasicTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse(
             $backend->check($request, $response)[0]
         );
-
     }
 
-    function testCheckSuccess() {
-
+    public function testCheckSuccess()
+    {
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'PHP_AUTH_USER' => 'username',
-            'PHP_AUTH_PW'   => 'password',
+            'PHP_AUTH_PW' => 'password',
         ]);
         $response = new HTTP\Response();
 
@@ -48,44 +52,39 @@ class AbstractBasicTest extends \PHPUnit_Framework_TestCase {
             [true, 'principals/username'],
             $backend->check($request, $response)
         );
-
     }
 
-    function testRequireAuth() {
-
-        $request = new HTTP\Request();
+    public function testRequireAuth()
+    {
+        $request = new HTTP\Request('GET', '/');
         $response = new HTTP\Response();
 
         $backend = new AbstractBasicMock();
         $backend->setRealm('writing unittests on a saturday night');
         $backend->challenge($request, $response);
 
-        $this->assertContains(
-            'Basic realm="writing unittests on a saturday night"',
+        $this->assertEquals(
+            'Basic realm="writing unittests on a saturday night", charset="UTF-8"',
             $response->getHeader('WWW-Authenticate')
         );
-
     }
-
 }
 
-
-class AbstractBasicMock extends AbstractBasic {
-
+class AbstractBasicMock extends AbstractBasic
+{
     /**
-     * Validates a username and password
+     * Validates a username and password.
      *
      * This method should return true or false depending on if login
      * succeeded.
      *
      * @param string $username
      * @param string $password
+     *
      * @return bool
      */
-    function validateUserPass($username, $password) {
-
-        return ($username == 'username' && $password == 'password');
-
+    public function validateUserPass($username, $password)
+    {
+        return 'username' == $username && 'password' == $password;
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php
index 14c72aaa0..d9af326fe 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php
@@ -1,27 +1,30 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\HTTP;
 
-class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
-
-    function testCheckNoHeaders() {
-
-        $request = new HTTP\Request();
+class AbstractDigestTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCheckNoHeaders()
+    {
+        $request = new HTTP\Request('GET', '/');
         $response = new HTTP\Response();
 
         $backend = new AbstractDigestMock();
         $this->assertFalse(
             $backend->check($request, $response)[0]
         );
-
     }
 
-    function testCheckBadGetUserInfoResponse() {
-
+    public function testCheckBadGetUserInfoResponse()
+    {
         $header = 'username=null, realm=myRealm, nonce=12345, uri=/, response=HASH, opaque=1, qop=auth, nc=1, cnonce=1';
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'PHP_AUTH_DIGEST' => $header,
         ]);
         $response = new HTTP\Response();
@@ -30,16 +33,17 @@ class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse(
             $backend->check($request, $response)[0]
         );
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testCheckBadGetUserInfoResponse2() {
-
+    public function testCheckBadGetUserInfoResponse2()
+    {
         $header = 'username=array, realm=myRealm, nonce=12345, uri=/, response=HASH, opaque=1, qop=auth, nc=1, cnonce=1';
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'PHP_AUTH_DIGEST' => $header,
         ]);
 
@@ -47,13 +51,14 @@ class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
 
         $backend = new AbstractDigestMock();
         $backend->check($request, $response);
-
     }
 
-    function testCheckUnknownUser() {
-
+    public function testCheckUnknownUser()
+    {
         $header = 'username=false, realm=myRealm, nonce=12345, uri=/, response=HASH, opaque=1, qop=auth, nc=1, cnonce=1';
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'PHP_AUTH_DIGEST' => $header,
         ]);
 
@@ -63,15 +68,15 @@ class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse(
             $backend->check($request, $response)[0]
         );
-
     }
 
-    function testCheckBadPassword() {
-
+    public function testCheckBadPassword()
+    {
         $header = 'username=user, realm=myRealm, nonce=12345, uri=/, response=HASH, opaque=1, qop=auth, nc=1, cnonce=1';
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'PUT',
+            'REQUEST_URI' => '/',
             'PHP_AUTH_DIGEST' => $header,
-            'REQUEST_METHOD'  => 'PUT',
         ]);
 
         $response = new HTTP\Response();
@@ -80,17 +85,16 @@ class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse(
             $backend->check($request, $response)[0]
         );
-
     }
 
-    function testCheck() {
-
-        $digestHash = md5('HELLO:12345:1:1:auth:' . md5('GET:/'));
-        $header = 'username=user, realm=myRealm, nonce=12345, uri=/, response=' . $digestHash . ', opaque=1, qop=auth, nc=1, cnonce=1';
+    public function testCheck()
+    {
+        $digestHash = md5('HELLO:12345:1:1:auth:'.md5('GET:/'));
+        $header = 'username=user, realm=myRealm, nonce=12345, uri=/, response='.$digestHash.', opaque=1, qop=auth, nc=1, cnonce=1';
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD'  => 'GET',
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'PHP_AUTH_DIGEST' => $header,
-            'REQUEST_URI'     => '/',
         ]);
 
         $response = new HTTP\Response();
@@ -100,12 +104,11 @@ class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
             [true, 'principals/user'],
             $backend->check($request, $response)
         );
-
     }
 
-    function testRequireAuth() {
-
-        $request = new HTTP\Request();
+    public function testRequireAuth()
+    {
+        $request = new HTTP\Request('GET', '/');
         $response = new HTTP\Response();
 
         $backend = new AbstractDigestMock();
@@ -116,23 +119,18 @@ class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
             'Digest realm="writing unittests on a saturday night"',
             $response->getHeader('WWW-Authenticate')
         );
-
     }
-
 }
 
-
-class AbstractDigestMock extends AbstractDigest {
-
-    function getDigestHash($realm, $userName) {
-
+class AbstractDigestMock extends AbstractDigest
+{
+    public function getDigestHash($realm, $userName)
+    {
         switch ($userName) {
-            case 'null' : return null;
-            case 'false' : return false;
-            case 'array' : return [];
-            case 'user'  : return 'HELLO';
+            case 'null': return null;
+            case 'false': return false;
+            case 'array': return [];
+            case 'user': return 'HELLO';
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php
index b14e9fa2e..5e34f9c49 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php
@@ -1,36 +1,35 @@
 <?php
 
-namespace Sabre\DAV\Auth\Backend;
+declare(strict_types=1);
 
-abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
+namespace Sabre\DAV\Auth\Backend;
 
+abstract class AbstractPDOTest extends \PHPUnit\Framework\TestCase
+{
     use \Sabre\DAV\DbTestHelperTrait;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->dropTables('users');
         $this->createSchema('users');
 
         $this->getPDO()->query(
             "INSERT INTO users (username,digesta1) VALUES ('user','hash')"
-
         );
-
     }
 
-    function testConstruct() {
-
+    public function testConstruct()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
         $this->assertTrue($backend instanceof PDO);
-
     }
 
     /**
      * @depends testConstruct
      */
-    function testUserInfo() {
-
+    public function testUserInfo()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
@@ -39,7 +38,5 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $expected = 'hash';
 
         $this->assertEquals($expected, $backend->getDigestHash('realm', 'user'));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php
index 29cbc2162..a0086518f 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php
@@ -1,33 +1,35 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\HTTP;
 
-class ApacheTest extends \PHPUnit_Framework_TestCase {
-
-    function testConstruct() {
-
+class ApacheTest extends \PHPUnit\Framework\TestCase
+{
+    public function testConstruct()
+    {
         $backend = new Apache();
         $this->assertInstanceOf('Sabre\DAV\Auth\Backend\Apache', $backend);
-
     }
 
-    function testNoHeader() {
-
-        $request = new HTTP\Request();
+    public function testNoHeader()
+    {
+        $request = new HTTP\Request('GET', '/');
         $response = new HTTP\Response();
         $backend = new Apache();
 
         $this->assertFalse(
             $backend->check($request, $response)[0]
         );
-
     }
 
-    function testRemoteUser() {
-
+    public function testRemoteUser()
+    {
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'REMOTE_USER' => 'username',
         ]);
         $response = new HTTP\Response();
@@ -37,12 +39,13 @@ class ApacheTest extends \PHPUnit_Framework_TestCase {
             [true, 'principals/username'],
             $backend->check($request, $response)
         );
-
     }
 
-    function testRedirectRemoteUser() {
-
+    public function testRedirectRemoteUser()
+    {
         $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'REQUEST_URI' => '/',
             'REDIRECT_REMOTE_USER' => 'username',
         ]);
         $response = new HTTP\Response();
@@ -52,12 +55,11 @@ class ApacheTest extends \PHPUnit_Framework_TestCase {
             [true, 'principals/username'],
             $backend->check($request, $response)
         );
-
     }
 
-    function testRequireAuth() {
-
-        $request = new HTTP\Request();
+    public function testRequireAuth()
+    {
+        $request = new HTTP\Request('GET', '/');
         $response = new HTTP\Response();
 
         $backend = new Apache();
@@ -66,6 +68,5 @@ class ApacheTest extends \PHPUnit_Framework_TestCase {
         $this->assertNull(
             $response->getHeader('WWW-Authenticate')
         );
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php
index f694f4806..0297b17f9 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php
@@ -1,41 +1,40 @@
 <?php
 
-namespace Sabre\DAV\Auth\Backend;
-
-class FileTest extends \PHPUnit_Framework_TestCase {
-
-    function tearDown() {
+declare(strict_types=1);
 
-        if (file_exists(SABRE_TEMPDIR . '/filebackend')) unlink(SABRE_TEMPDIR . '/filebackend');
+namespace Sabre\DAV\Auth\Backend;
 
+class FileTest extends \PHPUnit\Framework\TestCase
+{
+    public function tearDown()
+    {
+        if (file_exists(SABRE_TEMPDIR.'/filebackend')) {
+            unlink(SABRE_TEMPDIR.'/filebackend');
+        }
     }
 
-    function testConstruct() {
-
+    public function testConstruct()
+    {
         $file = new File();
         $this->assertTrue($file instanceof File);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testLoadFileBroken() {
-
-        file_put_contents(SABRE_TEMPDIR . '/backend', 'user:realm:hash');
-        $file = new File(SABRE_TEMPDIR . '/backend');
-
+    public function testLoadFileBroken()
+    {
+        file_put_contents(SABRE_TEMPDIR.'/backend', 'user:realm:hash');
+        $file = new File(SABRE_TEMPDIR.'/backend');
     }
 
-    function testLoadFile() {
-
-        file_put_contents(SABRE_TEMPDIR . '/backend', 'user:realm:' . md5('user:realm:password'));
+    public function testLoadFile()
+    {
+        file_put_contents(SABRE_TEMPDIR.'/backend', 'user:realm:'.md5('user:realm:password'));
         $file = new File();
-        $file->loadFile(SABRE_TEMPDIR . '/backend');
+        $file->loadFile(SABRE_TEMPDIR.'/backend');
 
         $this->assertFalse($file->getDigestHash('realm', 'blabla'));
         $this->assertEquals(md5('user:realm:password'), $file->getDigestHash('realm', 'user'));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php
index 369bc249e..730f2a975 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php
@@ -1,22 +1,23 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth\Backend;
 
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
-class Mock implements BackendInterface {
-
+class Mock implements BackendInterface
+{
     public $fail = false;
 
     public $invalidCheckResponse = false;
 
     public $principal = 'principals/admin';
 
-    function setPrincipal($principal) {
-
+    public function setPrincipal($principal)
+    {
         $this->principal = $principal;
-
     }
 
     /**
@@ -43,20 +44,21 @@ class Mock implements BackendInterface {
      *
      * principals/users/[username]
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
+     *
      * @return array
      */
-    function check(RequestInterface $request, ResponseInterface $response) {
-
+    public function check(RequestInterface $request, ResponseInterface $response)
+    {
         if ($this->invalidCheckResponse) {
             return 'incorrect!';
         }
         if ($this->fail) {
-            return [false, "fail!"];
+            return [false, 'fail!'];
         }
-        return [true, $this->principal];
 
+        return [true, $this->principal];
     }
 
     /**
@@ -76,12 +78,10 @@ class Mock implements BackendInterface {
      * append your own WWW-Authenticate header instead of overwriting the
      * existing one.
      *
-     * @param RequestInterface $request
+     * @param RequestInterface  $request
      * @param ResponseInterface $response
-     * @return void
      */
-    function challenge(RequestInterface $request, ResponseInterface $response) {
-
+    public function challenge(RequestInterface $request, ResponseInterface $response)
+    {
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php
index 18f59793a..6ad7906c4 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\DAV\Auth\Backend;
+declare(strict_types=1);
 
-class PDOMySQLTest extends AbstractPDOTest {
+namespace Sabre\DAV\Auth\Backend;
 
+class PDOMySQLTest extends AbstractPDOTest
+{
     public $driver = 'mysql';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php
index b1f382237..b42b40eff 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\DAV\Auth\Backend;
+declare(strict_types=1);
 
-class PDOSqliteTest extends AbstractPDOTest {
+namespace Sabre\DAV\Auth\Backend;
 
+class PDOSqliteTest extends AbstractPDOTest
+{
     public $driver = 'sqlite';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php
index 743446127..03c8a4624 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php
@@ -1,58 +1,57 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Auth;
 
 use Sabre\DAV;
 use Sabre\HTTP;
 
-class PluginTest extends \PHPUnit_Framework_TestCase {
-
-    function testInit() {
-
+class PluginTest extends \PHPUnit\Framework\TestCase
+{
+    public function testInit()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $plugin = new Plugin(new Backend\Mock());
         $this->assertTrue($plugin instanceof Plugin);
         $fakeServer->addPlugin($plugin);
         $this->assertEquals($plugin, $fakeServer->getPlugin('auth'));
         $this->assertInternalType('array', $plugin->getPluginInfo());
-
     }
 
     /**
      * @depends testInit
      */
-    function testAuthenticate() {
-
+    public function testAuthenticate()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $plugin = new Plugin(new Backend\Mock());
         $fakeServer->addPlugin($plugin);
         $this->assertTrue(
-            $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()])
+            $fakeServer->emit('beforeMethod:GET', [new HTTP\Request('GET', '/'), new HTTP\Response()])
         );
-
     }
 
     /**
      * @depends testInit
-     * @expectedException Sabre\DAV\Exception\NotAuthenticated
+     * @expectedException \Sabre\DAV\Exception\NotAuthenticated
      */
-    function testAuthenticateFail() {
-
+    public function testAuthenticateFail()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $backend = new Backend\Mock();
         $backend->fail = true;
 
         $plugin = new Plugin($backend);
         $fakeServer->addPlugin($plugin);
-        $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()]);
-
+        $fakeServer->emit('beforeMethod:GET', [new HTTP\Request('GET', '/'), new HTTP\Response()]);
     }
 
     /**
      * @depends testAuthenticateFail
      */
-    function testAuthenticateFailDontAutoRequire() {
-
+    public function testAuthenticateFailDontAutoRequire()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $backend = new Backend\Mock();
         $backend->fail = true;
@@ -61,17 +60,16 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $plugin->autoRequireLogin = false;
         $fakeServer->addPlugin($plugin);
         $this->assertTrue(
-            $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()])
+            $fakeServer->emit('beforeMethod:GET', [new HTTP\Request('GET', '/'), new HTTP\Response()])
         );
         $this->assertEquals(1, count($plugin->getLoginFailedReasons()));
-
     }
 
     /**
      * @depends testAuthenticate
      */
-    function testMultipleBackend() {
-
+    public function testMultipleBackend()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $backend1 = new Backend\Mock();
         $backend2 = new Backend\Mock();
@@ -82,52 +80,48 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $plugin->addBackend($backend2);
 
         $fakeServer->addPlugin($plugin);
-        $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()]);
+        $fakeServer->emit('beforeMethod:GET', [new HTTP\Request('GET', '/'), new HTTP\Response()]);
 
         $this->assertEquals('principals/admin', $plugin->getCurrentPrincipal());
-
     }
 
     /**
      * @depends testInit
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testNoAuthBackend() {
-
+    public function testNoAuthBackend()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
 
         $plugin = new Plugin();
         $fakeServer->addPlugin($plugin);
-        $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()]);
-
+        $fakeServer->emit('beforeMethod:GET', [new HTTP\Request('GET', '/'), new HTTP\Response()]);
     }
+
     /**
      * @depends testInit
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testInvalidCheckResponse() {
-
+    public function testInvalidCheckResponse()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $backend = new Backend\Mock();
         $backend->invalidCheckResponse = true;
 
         $plugin = new Plugin($backend);
         $fakeServer->addPlugin($plugin);
-        $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()]);
-
+        $fakeServer->emit('beforeMethod:GET', [new HTTP\Request('GET', '/'), new HTTP\Response()]);
     }
 
     /**
      * @depends testAuthenticate
      */
-    function testGetCurrentPrincipal() {
-
+    public function testGetCurrentPrincipal()
+    {
         $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $plugin = new Plugin(new Backend\Mock());
         $fakeServer->addPlugin($plugin);
-        $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()]);
+        $fakeServer->emit('beforeMethod:GET', [new HTTP\Request('GET', '/'), new HTTP\Response()]);
         $this->assertEquals('principals/admin', $plugin->getCurrentPrincipal());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php
index ec104ec80..60fcc73fc 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php
@@ -1,235 +1,138 @@
 <?php
 
-namespace Sabre\DAV;
+declare(strict_types=1);
 
-class BasicNodeTest extends \PHPUnit_Framework_TestCase {
+namespace Sabre\DAV;
 
+class BasicNodeTest extends \PHPUnit\Framework\TestCase
+{
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testPut() {
-
+    public function testPut()
+    {
         $file = new FileMock();
         $file->put('hi');
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testGet() {
-
+    public function testGet()
+    {
         $file = new FileMock();
         $file->get();
-
     }
 
-    function testGetSize() {
-
+    public function testGetSize()
+    {
         $file = new FileMock();
         $this->assertEquals(0, $file->getSize());
-
     }
 
-
-    function testGetETag() {
-
+    public function testGetETag()
+    {
         $file = new FileMock();
         $this->assertNull($file->getETag());
-
     }
 
-    function testGetContentType() {
-
+    public function testGetContentType()
+    {
         $file = new FileMock();
         $this->assertNull($file->getContentType());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testDelete() {
-
+    public function testDelete()
+    {
         $file = new FileMock();
         $file->delete();
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetName() {
-
+    public function testSetName()
+    {
         $file = new FileMock();
         $file->setName('hi');
-
     }
 
-    function testGetLastModified() {
-
+    public function testGetLastModified()
+    {
         $file = new FileMock();
         // checking if lastmod is within the range of a few seconds
         $lastMod = $file->getLastModified();
         $compareTime = ($lastMod + 1) - time();
         $this->assertTrue($compareTime < 3);
-
     }
 
-    function testGetChild() {
-
+    public function testGetChild()
+    {
         $dir = new DirectoryMock();
         $file = $dir->getChild('mockfile');
         $this->assertTrue($file instanceof FileMock);
-
     }
 
-    function testChildExists() {
-
+    public function testChildExists()
+    {
         $dir = new DirectoryMock();
         $this->assertTrue($dir->childExists('mockfile'));
-
     }
 
-    function testChildExistsFalse() {
-
+    public function testChildExistsFalse()
+    {
         $dir = new DirectoryMock();
         $this->assertFalse($dir->childExists('mockfile2'));
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotFound
+     * @expectedException \Sabre\DAV\Exception\NotFound
      */
-    function testGetChild404() {
-
+    public function testGetChild404()
+    {
         $dir = new DirectoryMock();
         $file = $dir->getChild('blabla');
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testCreateFile() {
-
+    public function testCreateFile()
+    {
         $dir = new DirectoryMock();
         $dir->createFile('hello', 'data');
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\Forbidden
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testCreateDirectory() {
-
+    public function testCreateDirectory()
+    {
         $dir = new DirectoryMock();
         $dir->createDirectory('hello');
-
-    }
-
-    function testSimpleDirectoryConstruct() {
-
-        $dir = new SimpleCollection('simpledir', []);
-        $this->assertInstanceOf('Sabre\DAV\SimpleCollection', $dir);
-
-    }
-
-    /**
-     * @depends testSimpleDirectoryConstruct
-     */
-    function testSimpleDirectoryConstructChild() {
-
-        $file = new FileMock();
-        $dir = new SimpleCollection('simpledir', [$file]);
-        $file2 = $dir->getChild('mockfile');
-
-        $this->assertEquals($file, $file2);
-
-    }
-
-    /**
-     * @expectedException Sabre\DAV\Exception
-     * @depends testSimpleDirectoryConstruct
-     */
-    function testSimpleDirectoryBadParam() {
-
-        $dir = new SimpleCollection('simpledir', ['string shouldn\'t be here']);
-
-    }
-
-    /**
-     * @depends testSimpleDirectoryConstruct
-     */
-    function testSimpleDirectoryAddChild() {
-
-        $file = new FileMock();
-        $dir = new SimpleCollection('simpledir');
-        $dir->addChild($file);
-        $file2 = $dir->getChild('mockfile');
-
-        $this->assertEquals($file, $file2);
-
-    }
-
-    /**
-     * @depends testSimpleDirectoryConstruct
-     * @depends testSimpleDirectoryAddChild
-     */
-    function testSimpleDirectoryGetChildren() {
-
-        $file = new FileMock();
-        $dir = new SimpleCollection('simpledir');
-        $dir->addChild($file);
-
-        $this->assertEquals([$file], $dir->getChildren());
-
-    }
-
-    /*
-     * @depends testSimpleDirectoryConstruct
-     */
-    function testSimpleDirectoryGetName() {
-
-        $dir = new SimpleCollection('simpledir');
-        $this->assertEquals('simpledir', $dir->getName());
-
-    }
-
-    /**
-     * @depends testSimpleDirectoryConstruct
-     * @expectedException Sabre\DAV\Exception\NotFound
-     */
-    function testSimpleDirectoryGetChild404() {
-
-        $dir = new SimpleCollection('simpledir');
-        $dir->getChild('blabla');
-
     }
 }
 
-class DirectoryMock extends Collection {
-
-    function getName() {
-
+class DirectoryMock extends Collection
+{
+    public function getName()
+    {
         return 'mockdir';
-
     }
 
-    function getChildren() {
-
+    public function getChildren()
+    {
         return [new FileMock()];
-
     }
-
 }
 
-class FileMock extends File {
-
-    function getName() {
-
+class FileMock extends File
+{
+    public function getName()
+    {
         return 'mockfile';
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php
index 54a3053ec..1f48256e0 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php
@@ -1,29 +1,30 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\DAV;
 
 require_once 'Sabre/DAV/AbstractServer.php';
-class GuessContentTypeTest extends DAV\AbstractServer {
-
-    function setUp() {
-
+class GuessContentTypeTest extends DAV\AbstractServer
+{
+    public function setUp()
+    {
         parent::setUp();
         \Sabre\TestUtil::clearTempDir();
-        file_put_contents(SABRE_TEMPDIR . '/somefile.jpg', 'blabla');
-        file_put_contents(SABRE_TEMPDIR . '/somefile.hoi', 'blabla');
-
+        file_put_contents(SABRE_TEMPDIR.'/somefile.jpg', 'blabla');
+        file_put_contents(SABRE_TEMPDIR.'/somefile.hoi', 'blabla');
     }
 
-    function tearDown() {
-
+    public function tearDown()
+    {
         \Sabre\TestUtil::clearTempDir();
         parent::tearDown();
     }
 
-    function testGetProperties() {
-
+    public function testGetProperties()
+    {
         $properties = [
             '{DAV:}getcontenttype',
         ];
@@ -31,31 +32,29 @@ class GuessContentTypeTest extends DAV\AbstractServer {
         $this->assertArrayHasKey(0, $result);
         $this->assertArrayHasKey(404, $result[0]);
         $this->assertArrayHasKey('{DAV:}getcontenttype', $result[0][404]);
-
     }
 
     /**
      * @depends testGetProperties
      */
-    function testGetPropertiesPluginEnabled() {
-
+    public function testGetPropertiesPluginEnabled()
+    {
         $this->server->addPlugin(new GuessContentType());
         $properties = [
             '{DAV:}getcontenttype',
         ];
         $result = $this->server->getPropertiesForPath('/somefile.jpg', $properties);
         $this->assertArrayHasKey(0, $result);
-        $this->assertArrayHasKey(200, $result[0], 'We received: ' . print_r($result, true));
+        $this->assertArrayHasKey(200, $result[0], 'We received: '.print_r($result, true));
         $this->assertArrayHasKey('{DAV:}getcontenttype', $result[0][200]);
         $this->assertEquals('image/jpeg', $result[0][200]['{DAV:}getcontenttype']);
-
     }
 
     /**
      * @depends testGetPropertiesPluginEnabled
      */
-    function testGetPropertiesUnknown() {
-
+    public function testGetPropertiesUnknown()
+    {
         $this->server->addPlugin(new GuessContentType());
         $properties = [
             '{DAV:}getcontenttype',
@@ -65,6 +64,5 @@ class GuessContentTypeTest extends DAV\AbstractServer {
         $this->assertArrayHasKey(200, $result[0]);
         $this->assertArrayHasKey('{DAV:}getcontenttype', $result[0][200]);
         $this->assertEquals('application/octet-stream', $result[0][200]['{DAV:}getcontenttype']);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php
index 33c4ede96..de7b85f32 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\DAV;
@@ -7,19 +9,18 @@ use Sabre\HTTP;
 
 require_once 'Sabre/DAV/AbstractServer.php';
 
-class MapGetToPropFindTest extends DAV\AbstractServer {
-
-    function setUp() {
-
+class MapGetToPropFindTest extends DAV\AbstractServer
+{
+    public function setUp()
+    {
         parent::setUp();
         $this->server->addPlugin(new MapGetToPropFind());
-
     }
 
-    function testCollectionGet() {
-
+    public function testCollectionGet()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'GET',
         ];
 
@@ -28,17 +29,14 @@ class MapGetToPropFindTest extends DAV\AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Incorrect status response received. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Incorrect status response received. Full response body: '.$this->response->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
-            'DAV'             => ['1, 3, extended-mkcol'],
-            'Vary'            => ['Brief,Prefer'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
+            'DAV' => ['1, 3, extended-mkcol'],
+            'Vary' => ['Brief,Prefer'],
             ],
             $this->response->getHeaders()
          );
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php
index f20c50f86..fb7c63d46 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Browser;
 
 use Sabre\DAV;
@@ -7,129 +9,123 @@ use Sabre\HTTP;
 
 require_once 'Sabre/DAV/AbstractServer.php';
 
-class PluginTest extends DAV\AbstractServer{
-
+class PluginTest extends DAV\AbstractServer
+{
     protected $plugin;
 
-    function setUp() {
-
+    public function setUp()
+    {
         parent::setUp();
         $this->server->addPlugin($this->plugin = new Plugin());
         $this->server->tree->getNodeForPath('')->createDirectory('dir2');
-
     }
 
-    function testCollectionGet() {
-
+    public function testCollectionGet()
+    {
         $request = new HTTP\Request('GET', '/dir');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(200, $this->response->getStatus(), "Incorrect status received. Full response body: " . $this->response->getBodyAsString());
+        $this->assertEquals(200, $this->response->getStatus(), 'Incorrect status received. Full response body: '.$this->response->getBodyAsString());
         $this->assertEquals(
             [
-                'X-Sabre-Version'         => [DAV\Version::VERSION],
-                'Content-Type'            => ['text/html; charset=utf-8'],
-                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
+                'X-Sabre-Version' => [DAV\Version::VERSION],
+                'Content-Type' => ['text/html; charset=utf-8'],
+                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"],
             ],
             $this->response->getHeaders()
         );
 
         $body = $this->response->getBodyAsString();
-        $this->assertTrue(strpos($body, '<title>dir') !== false, $body);
-        $this->assertTrue(strpos($body, '<a href="/dir/child.txt">') !== false);
-
+        $this->assertTrue(false !== strpos($body, '<title>dir'), $body);
+        $this->assertTrue(false !== strpos($body, '<a href="/dir/child.txt">'));
     }
 
     /**
      * Adding the If-None-Match should have 0 effect, but it threw an error.
      */
-    function testCollectionGetIfNoneMatch() {
-
+    public function testCollectionGetIfNoneMatch()
+    {
         $request = new HTTP\Request('GET', '/dir');
         $request->setHeader('If-None-Match', '"foo-bar"');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(200, $this->response->getStatus(), "Incorrect status received. Full response body: " . $this->response->getBodyAsString());
+        $this->assertEquals(200, $this->response->getStatus(), 'Incorrect status received. Full response body: '.$this->response->getBodyAsString());
         $this->assertEquals(
             [
-                'X-Sabre-Version'         => [DAV\Version::VERSION],
-                'Content-Type'            => ['text/html; charset=utf-8'],
-                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
+                'X-Sabre-Version' => [DAV\Version::VERSION],
+                'Content-Type' => ['text/html; charset=utf-8'],
+                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"],
             ],
             $this->response->getHeaders()
         );
 
         $body = $this->response->getBodyAsString();
-        $this->assertTrue(strpos($body, '<title>dir') !== false, $body);
-        $this->assertTrue(strpos($body, '<a href="/dir/child.txt">') !== false);
-
+        $this->assertTrue(false !== strpos($body, '<title>dir'), $body);
+        $this->assertTrue(false !== strpos($body, '<a href="/dir/child.txt">'));
     }
-    function testCollectionGetRoot() {
 
+    public function testCollectionGetRoot()
+    {
         $request = new HTTP\Request('GET', '/');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(200, $this->response->status, "Incorrect status received. Full response body: " . $this->response->getBodyAsString());
+        $this->assertEquals(200, $this->response->status, 'Incorrect status received. Full response body: '.$this->response->getBodyAsString());
         $this->assertEquals(
             [
-                'X-Sabre-Version'         => [DAV\Version::VERSION],
-                'Content-Type'            => ['text/html; charset=utf-8'],
-                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
+                'X-Sabre-Version' => [DAV\Version::VERSION],
+                'Content-Type' => ['text/html; charset=utf-8'],
+                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"],
             ],
             $this->response->getHeaders()
         );
 
         $body = $this->response->getBodyAsString();
-        $this->assertTrue(strpos($body, '<title>/') !== false, $body);
-        $this->assertTrue(strpos($body, '<a href="/dir/">') !== false);
-        $this->assertTrue(strpos($body, '<span class="btn disabled">') !== false);
-
+        $this->assertTrue(false !== strpos($body, '<title>/'), $body);
+        $this->assertTrue(false !== strpos($body, '<a href="/dir/">'));
+        $this->assertTrue(false !== strpos($body, '<span class="btn disabled">'));
     }
 
-    function testGETPassthru() {
-
+    public function testGETPassthru()
+    {
         $request = new HTTP\Request('GET', '/random');
         $response = new HTTP\Response();
         $this->assertNull(
             $this->plugin->httpGet($request, $response)
         );
-
     }
 
-    function testPostOtherContentType() {
-
+    public function testPostOtherContentType()
+    {
         $request = new HTTP\Request('POST', '/', ['Content-Type' => 'text/xml']);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(501, $this->response->status);
-
     }
 
-    function testPostNoSabreAction() {
-
+    public function testPostNoSabreAction()
+    {
         $request = new HTTP\Request('POST', '/', ['Content-Type' => 'application/x-www-form-urlencoded']);
         $request->setPostData([]);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(501, $this->response->status);
-
     }
 
-    function testPostMkCol() {
-
+    public function testPostMkCol()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'POST',
-            'CONTENT_TYPE'   => 'application/x-www-form-urlencoded',
+            'CONTENT_TYPE' => 'application/x-www-form-urlencoded',
         ];
         $postVars = [
             'sabreAction' => 'mkcol',
-            'name'        => 'new_collection',
+            'name' => 'new_collection',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -140,47 +136,43 @@ class PluginTest extends DAV\AbstractServer{
         $this->assertEquals(302, $this->response->status);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Location'        => ['/'],
+            'Location' => ['/'],
         ], $this->response->getHeaders());
 
-        $this->assertTrue(is_dir(SABRE_TEMPDIR . '/new_collection'));
-
+        $this->assertTrue(is_dir(SABRE_TEMPDIR.'/new_collection'));
     }
 
-    function testGetAsset() {
-
+    public function testGetAsset()
+    {
         $request = new HTTP\Request('GET', '/?sabreAction=asset&assetName=favicon.ico');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(200, $this->response->getStatus(), 'Error: ' . $this->response->body);
+        $this->assertEquals(200, $this->response->getStatus(), 'Error: '.$this->response->body);
         $this->assertEquals([
-            'X-Sabre-Version'         => [DAV\Version::VERSION],
-            'Content-Type'            => ['image/vnd.microsoft.icon'],
-            'Content-Length'          => ['4286'],
-            'Cache-Control'           => ['public, max-age=1209600'],
-            'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
+            'X-Sabre-Version' => [DAV\Version::VERSION],
+            'Content-Type' => ['image/vnd.microsoft.icon'],
+            'Content-Length' => ['4286'],
+            'Cache-Control' => ['public, max-age=1209600'],
+            'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"],
         ], $this->response->getHeaders());
-
     }
 
-    function testGetAsset404() {
-
+    public function testGetAsset404()
+    {
         $request = new HTTP\Request('GET', '/?sabreAction=asset&assetName=flavicon.ico');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(404, $this->response->getStatus(), 'Error: ' . $this->response->body);
-
+        $this->assertEquals(404, $this->response->getStatus(), 'Error: '.$this->response->body);
     }
 
-    function testGetAssetEscapeBasePath() {
-
+    public function testGetAssetEscapeBasePath()
+    {
         $request = new HTTP\Request('GET', '/?sabreAction=asset&assetName=./../assets/favicon.ico');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(404, $this->response->getStatus(), 'Error: ' . $this->response->body);
-
+        $this->assertEquals(404, $this->response->getStatus(), 'Error: '.$this->response->body);
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php b/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php
index 5a48b063c..7d787744a 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php
@@ -1,11 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
 
-class ClientMock extends Client {
-
+class ClientMock extends Client
+{
     public $request;
     public $response;
 
@@ -13,22 +16,21 @@ class ClientMock extends Client {
     public $curlSettings;
 
     /**
-     * Just making this method public
+     * Just making this method public.
      *
      * @param string $url
+     *
      * @return string
      */
-    function getAbsoluteUrl($url) {
-
+    public function getAbsoluteUrl($url)
+    {
         return parent::getAbsoluteUrl($url);
-
     }
 
-    function doRequest(RequestInterface $request) {
-
+    public function doRequest(RequestInterface $request): ResponseInterface
+    {
         $this->request = $request;
-        return $this->response;
 
+        return $this->response;
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ClientTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ClientTest.php
index 687f61e2f..e9362c8e4 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ClientTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ClientTest.php
@@ -1,119 +1,111 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
-use Sabre\HTTP\Request;
 use Sabre\HTTP\Response;
 
 require_once 'Sabre/DAV/ClientMock.php';
 
-class ClientTest extends \PHPUnit_Framework_TestCase {
-
-    function setUp() {
-
+class ClientTest extends \PHPUnit\Framework\TestCase
+{
+    public function setUp()
+    {
         if (!function_exists('curl_init')) {
             $this->markTestSkipped('CURL must be installed to test the client');
         }
-
     }
 
-    function testConstruct() {
-
+    public function testConstruct()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
         $this->assertInstanceOf('Sabre\DAV\ClientMock', $client);
-
     }
 
     /**
-     * @expectedException InvalidArgumentException
+     * @expectedException \InvalidArgumentException
      */
-    function testConstructNoBaseUri() {
-
+    public function testConstructNoBaseUri()
+    {
         $client = new ClientMock([]);
-
     }
 
-    function testAuth() {
-
+    public function testAuth()
+    {
         $client = new ClientMock([
-            'baseUri'  => '/',
+            'baseUri' => '/',
             'userName' => 'foo',
             'password' => 'bar',
         ]);
 
-        $this->assertEquals("foo:bar", $client->curlSettings[CURLOPT_USERPWD]);
+        $this->assertEquals('foo:bar', $client->curlSettings[CURLOPT_USERPWD]);
         $this->assertEquals(CURLAUTH_BASIC | CURLAUTH_DIGEST, $client->curlSettings[CURLOPT_HTTPAUTH]);
-
     }
 
-    function testBasicAuth() {
-
+    public function testBasicAuth()
+    {
         $client = new ClientMock([
-            'baseUri'  => '/',
+            'baseUri' => '/',
             'userName' => 'foo',
             'password' => 'bar',
-            'authType' => Client::AUTH_BASIC
+            'authType' => Client::AUTH_BASIC,
         ]);
 
-        $this->assertEquals("foo:bar", $client->curlSettings[CURLOPT_USERPWD]);
+        $this->assertEquals('foo:bar', $client->curlSettings[CURLOPT_USERPWD]);
         $this->assertEquals(CURLAUTH_BASIC, $client->curlSettings[CURLOPT_HTTPAUTH]);
-
     }
 
-    function testDigestAuth() {
-
+    public function testDigestAuth()
+    {
         $client = new ClientMock([
-            'baseUri'  => '/',
+            'baseUri' => '/',
             'userName' => 'foo',
             'password' => 'bar',
-            'authType' => Client::AUTH_DIGEST
+            'authType' => Client::AUTH_DIGEST,
         ]);
 
-        $this->assertEquals("foo:bar", $client->curlSettings[CURLOPT_USERPWD]);
+        $this->assertEquals('foo:bar', $client->curlSettings[CURLOPT_USERPWD]);
         $this->assertEquals(CURLAUTH_DIGEST, $client->curlSettings[CURLOPT_HTTPAUTH]);
-
     }
 
-    function testNTLMAuth() {
-
+    public function testNTLMAuth()
+    {
         $client = new ClientMock([
-            'baseUri'  => '/',
+            'baseUri' => '/',
             'userName' => 'foo',
             'password' => 'bar',
-            'authType' => Client::AUTH_NTLM
+            'authType' => Client::AUTH_NTLM,
         ]);
 
-        $this->assertEquals("foo:bar", $client->curlSettings[CURLOPT_USERPWD]);
+        $this->assertEquals('foo:bar', $client->curlSettings[CURLOPT_USERPWD]);
         $this->assertEquals(CURLAUTH_NTLM, $client->curlSettings[CURLOPT_HTTPAUTH]);
-
     }
 
-    function testProxy() {
-
+    public function testProxy()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
-            'proxy'   => 'localhost:8888',
+            'proxy' => 'localhost:8888',
         ]);
 
-        $this->assertEquals("localhost:8888", $client->curlSettings[CURLOPT_PROXY]);
-
+        $this->assertEquals('localhost:8888', $client->curlSettings[CURLOPT_PROXY]);
     }
 
-    function testEncoding() {
-
+    public function testEncoding()
+    {
         $client = new ClientMock([
-            'baseUri'  => '/',
+            'baseUri' => '/',
             'encoding' => Client::ENCODING_IDENTITY | Client::ENCODING_GZIP | Client::ENCODING_DEFLATE,
         ]);
 
-        $this->assertEquals("identity,deflate,gzip", $client->curlSettings[CURLOPT_ENCODING]);
-
+        $this->assertEquals('identity,deflate,gzip', $client->curlSettings[CURLOPT_ENCODING]);
     }
 
-    function testPropFind() {
-
+    public function testPropFind()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
@@ -142,28 +134,26 @@ XML;
         $this->assertEquals('PROPFIND', $request->getMethod());
         $this->assertEquals('/foo', $request->getUrl());
         $this->assertEquals([
-            'Depth'        => ['0'],
+            'Depth' => ['0'],
             'Content-Type' => ['application/xml'],
         ], $request->getHeaders());
-
     }
 
     /**
      * @expectedException \Sabre\HTTP\ClientHttpException
      */
-    function testPropFindError() {
-
+    public function testPropFindError()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
 
         $client->response = new Response(405, []);
         $client->propFind('foo', ['{DAV:}displayname', '{urn:zim}gir']);
-
     }
 
-    function testPropFindDepth1() {
-
+    public function testPropFindDepth1()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
@@ -188,7 +178,7 @@ XML;
 
         $this->assertEquals([
             '/foo' => [
-            '{DAV:}displayname' => 'bar'
+            '{DAV:}displayname' => 'bar',
             ],
         ], $result);
 
@@ -196,14 +186,13 @@ XML;
         $this->assertEquals('PROPFIND', $request->getMethod());
         $this->assertEquals('/foo', $request->getUrl());
         $this->assertEquals([
-            'Depth'        => ['1'],
+            'Depth' => ['1'],
             'Content-Type' => ['application/xml'],
         ], $request->getHeaders());
-
     }
 
-    function testPropPatch() {
-
+    public function testPropPatch()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
@@ -232,30 +221,28 @@ XML;
         $this->assertEquals([
             'Content-Type' => ['application/xml'],
         ], $request->getHeaders());
-
     }
 
     /**
      * @depends testPropPatch
      * @expectedException \Sabre\HTTP\ClientHttpException
      */
-    function testPropPatchHTTPError() {
-
+    public function testPropPatchHTTPError()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
 
         $client->response = new Response(403, [], '');
         $client->propPatch('foo', ['{DAV:}displayname' => 'hi', '{urn:zim}gir' => null]);
-
     }
 
     /**
      * @depends testPropPatch
-     * @expectedException Sabre\HTTP\ClientException
+     * @expectedException \Sabre\HTTP\ClientException
      */
-    function testPropPatchMultiStatusError() {
-
+    public function testPropPatchMultiStatusError()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
@@ -277,11 +264,10 @@ XML;
 
         $client->response = new Response(207, [], $responseBody);
         $client->propPatch('foo', ['{DAV:}displayname' => 'hi', '{urn:zim}gir' => null]);
-
     }
 
-    function testOPTIONS() {
-
+    public function testOPTIONS()
+    {
         $client = new ClientMock([
             'baseUri' => '/',
         ]);
@@ -301,6 +287,5 @@ XML;
         $this->assertEquals('/', $request->getUrl());
         $this->assertEquals([
         ], $request->getHeaders());
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php
index 174a561b5..5fc271587 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php
@@ -1,14 +1,16 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Exception;
 
 use DOMDocument;
 use Sabre\DAV;
 
-class LockedTest extends \PHPUnit_Framework_TestCase {
-
-    function testSerialize() {
-
+class LockedTest extends \PHPUnit\Framework\TestCase
+{
+    public function testSerialize()
+    {
         $dom = new DOMDocument('1.0');
         $dom->formatOutput = true;
         $root = $dom->createElement('d:root');
@@ -33,11 +35,10 @@ class LockedTest extends \PHPUnit_Framework_TestCase {
 ';
 
         $this->assertEquals($expected, $output);
-
     }
 
-    function testSerializeAmpersand() {
-
+    public function testSerializeAmpersand()
+    {
         $dom = new DOMDocument('1.0');
         $dom->formatOutput = true;
         $root = $dom->createElement('d:root');
@@ -62,6 +63,5 @@ class LockedTest extends \PHPUnit_Framework_TestCase {
 ';
 
         $this->assertEquals($expected, $output);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Exception/PaymentRequiredTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Exception/PaymentRequiredTest.php
index 7142937b4..42775a313 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Exception/PaymentRequiredTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Exception/PaymentRequiredTest.php
@@ -1,14 +1,14 @@
 <?php
 
-namespace Sabre\DAV\Exception;
-
-class PaymentRequiredTest extends \PHPUnit_Framework_TestCase {
+declare(strict_types=1);
 
-    function testGetHTTPCode() {
+namespace Sabre\DAV\Exception;
 
+class PaymentRequiredTest extends \PHPUnit\Framework\TestCase
+{
+    public function testGetHTTPCode()
+    {
         $ex = new PaymentRequired();
         $this->assertEquals(402, $ex->getHTTPCode());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php
index 0eb4f3dd8..7237aea0d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php
@@ -1,30 +1,27 @@
 <?php
 
-namespace Sabre\DAV;
-
-class ExceptionTest extends \PHPUnit_Framework_TestCase {
+declare(strict_types=1);
 
-    function testStatus() {
+namespace Sabre\DAV;
 
+class ExceptionTest extends \PHPUnit\Framework\TestCase
+{
+    public function testStatus()
+    {
         $e = new Exception();
         $this->assertEquals(500, $e->getHTTPCode());
-
     }
 
-    function testExceptionStatuses() {
-
+    public function testExceptionStatuses()
+    {
         $c = [
-            'Sabre\\DAV\\Exception\\NotAuthenticated'    => 401,
+            'Sabre\\DAV\\Exception\\NotAuthenticated' => 401,
             'Sabre\\DAV\\Exception\\InsufficientStorage' => 507,
         ];
 
         foreach ($c as $class => $status) {
-
             $obj = new $class();
             $this->assertEquals($status, $obj->getHTTPCode());
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php
index f5d65a44f..4bc79b597 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php
@@ -1,110 +1,101 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\FSExt;
 
 require_once 'Sabre/TestUtil.php';
 
-class FileTest extends \PHPUnit_Framework_TestCase {
-
-    function setUp() {
-
-        file_put_contents(SABRE_TEMPDIR . '/file.txt', 'Contents');
-
+class FileTest extends \PHPUnit\Framework\TestCase
+{
+    public function setUp()
+    {
+        file_put_contents(SABRE_TEMPDIR.'/file.txt', 'Contents');
     }
 
-    function tearDown() {
-
+    public function tearDown()
+    {
         \Sabre\TestUtil::clearTempDir();
-
     }
 
-    function testPut() {
-
-        $filename = SABRE_TEMPDIR . '/file.txt';
+    public function testPut()
+    {
+        $filename = SABRE_TEMPDIR.'/file.txt';
         $file = new File($filename);
         $result = $file->put('New contents');
 
-        $this->assertEquals('New contents', file_get_contents(SABRE_TEMPDIR . '/file.txt'));
+        $this->assertEquals('New contents', file_get_contents(SABRE_TEMPDIR.'/file.txt'));
         $this->assertEquals(
-            '"' .
+            '"'.
             sha1(
-                fileinode($filename) .
-                filesize($filename) .
+                fileinode($filename).
+                filesize($filename).
                 filemtime($filename)
-            ) . '"',
+            ).'"',
             $result
         );
-
     }
 
-    function testRange() {
-
-        $file = new File(SABRE_TEMPDIR . '/file.txt');
+    public function testRange()
+    {
+        $file = new File(SABRE_TEMPDIR.'/file.txt');
         $file->put('0000000');
         $file->patch('111', 2, 3);
 
-        $this->assertEquals('0001110', file_get_contents(SABRE_TEMPDIR . '/file.txt'));
-
+        $this->assertEquals('0001110', file_get_contents(SABRE_TEMPDIR.'/file.txt'));
     }
 
-    function testRangeStream() {
-
+    public function testRangeStream()
+    {
         $stream = fopen('php://memory', 'r+');
-        fwrite($stream, "222");
+        fwrite($stream, '222');
         rewind($stream);
 
-        $file = new File(SABRE_TEMPDIR . '/file.txt');
+        $file = new File(SABRE_TEMPDIR.'/file.txt');
         $file->put('0000000');
         $file->patch($stream, 2, 3);
 
-        $this->assertEquals('0002220', file_get_contents(SABRE_TEMPDIR . '/file.txt'));
-
+        $this->assertEquals('0002220', file_get_contents(SABRE_TEMPDIR.'/file.txt'));
     }
 
-
-    function testGet() {
-
-        $file = new File(SABRE_TEMPDIR . '/file.txt');
+    public function testGet()
+    {
+        $file = new File(SABRE_TEMPDIR.'/file.txt');
         $this->assertEquals('Contents', stream_get_contents($file->get()));
-
     }
 
-    function testDelete() {
-
-        $file = new File(SABRE_TEMPDIR . '/file.txt');
+    public function testDelete()
+    {
+        $file = new File(SABRE_TEMPDIR.'/file.txt');
         $file->delete();
 
-        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/file.txt'));
-
+        $this->assertFalse(file_exists(SABRE_TEMPDIR.'/file.txt'));
     }
 
-    function testGetETag() {
-
-        $filename = SABRE_TEMPDIR . '/file.txt';
+    public function testGetETag()
+    {
+        $filename = SABRE_TEMPDIR.'/file.txt';
         $file = new File($filename);
         $this->assertEquals(
-            '"' .
+            '"'.
             sha1(
-                fileinode($filename) .
-                filesize($filename) .
+                fileinode($filename).
+                filesize($filename).
                 filemtime($filename)
-            ) . '"',
+            ).'"',
             $file->getETag()
         );
     }
 
-    function testGetContentType() {
-
-        $file = new File(SABRE_TEMPDIR . '/file.txt');
+    public function testGetContentType()
+    {
+        $file = new File(SABRE_TEMPDIR.'/file.txt');
         $this->assertNull($file->getContentType());
-
     }
 
-    function testGetSize() {
-
-        $file = new File(SABRE_TEMPDIR . '/file.txt');
+    public function testGetSize()
+    {
+        $file = new File(SABRE_TEMPDIR.'/file.txt');
         $this->assertEquals(8, $file->getSize());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php
index 20fca490a..daa04c354 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\FSExt;
 
 use Sabre\DAV;
@@ -7,81 +9,76 @@ use Sabre\HTTP;
 
 require_once 'Sabre/DAV/AbstractServer.php';
 
-class ServerTest extends DAV\AbstractServer{
-
-    protected function getRootNode() {
-
+class ServerTest extends DAV\AbstractServer
+{
+    protected function getRootNode()
+    {
         return new Directory($this->tempDir);
-
     }
 
-    function testGet() {
-
+    public function testGet()
+    {
         $request = new HTTP\Request('GET', '/test.txt');
-        $filename = $this->tempDir . '/test.txt';
+        $filename = $this->tempDir.'/test.txt';
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(200, $this->response->getStatus(), 'Invalid status code received.');
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [13],
-            'Last-Modified'   => [HTTP\Util::toHTTPDate(new \DateTime('@' . filemtime($filename)))],
-            'ETag'            => ['"' . sha1(fileinode($filename) . filesize($filename) . filemtime($filename)) . '"'],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [13],
+            'Last-Modified' => [HTTP\toDate(new \DateTime('@'.filemtime($filename)))],
+            'ETag' => ['"'.sha1(fileinode($filename).filesize($filename).filemtime($filename)).'"'],
             ],
             $this->response->getHeaders()
          );
 
-
         $this->assertEquals('Test contents', stream_get_contents($this->response->body));
-
     }
 
-    function testHEAD() {
-
+    public function testHEAD()
+    {
         $request = new HTTP\Request('HEAD', '/test.txt');
-        $filename = $this->tempDir . '/test.txt';
+        $filename = $this->tempDir.'/test.txt';
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [13],
-            'Last-Modified'   => [HTTP\Util::toHTTPDate(new \DateTime('@' . filemtime($this->tempDir . '/test.txt')))],
-            'ETag'            => ['"' . sha1(fileinode($filename) . filesize($filename) . filemtime($filename)) . '"'],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [13],
+            'Last-Modified' => [HTTP\toDate(new \DateTime('@'.filemtime($this->tempDir.'/test.txt')))],
+            'ETag' => ['"'.sha1(fileinode($filename).filesize($filename).filemtime($filename)).'"'],
             ],
             $this->response->getHeaders()
          );
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals('', $this->response->body);
-
     }
 
-    function testPut() {
-
+    public function testPut()
+    {
         $request = new HTTP\Request('PUT', '/testput.txt');
-        $filename = $this->tempDir . '/testput.txt';
+        $filename = $this->tempDir.'/testput.txt';
         $request->setBody('Testing new file');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length'  => ['0'],
-            'ETag'            => ['"' . sha1(fileinode($filename) . filesize($filename) . filemtime($filename)) . '"'],
+            'Content-Length' => ['0'],
+            'ETag' => ['"'.sha1(fileinode($filename).filesize($filename).filemtime($filename)).'"'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('', $this->response->body);
         $this->assertEquals('Testing new file', file_get_contents($filename));
-
     }
 
-    function testPutAlreadyExists() {
-
+    public function testPutAlreadyExists()
+    {
         $request = new HTTP\Request('PUT', '/test.txt', ['If-None-Match' => '*']);
         $request->setBody('Testing new file');
         $this->server->httpRequest = ($request);
@@ -89,33 +86,31 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(412, $this->response->status);
-        $this->assertNotEquals('Testing new file', file_get_contents($this->tempDir . '/test.txt'));
-
+        $this->assertNotEquals('Testing new file', file_get_contents($this->tempDir.'/test.txt'));
     }
 
-    function testMkcol() {
-
+    public function testMkcol()
+    {
         $request = new HTTP\Request('MKCOL', '/testcol');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertTrue(is_dir($this->tempDir . '/testcol'));
-
+        $this->assertTrue(is_dir($this->tempDir.'/testcol'));
     }
 
-    function testPutUpdate() {
-
+    public function testPutUpdate()
+    {
         $request = new HTTP\Request('PUT', '/test.txt');
         $request->setBody('Testing updated file');
         $this->server->httpRequest = ($request);
@@ -125,31 +120,29 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals(204, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertEquals('Testing updated file', file_get_contents($this->tempDir . '/test.txt'));
-
+        $this->assertEquals('Testing updated file', file_get_contents($this->tempDir.'/test.txt'));
     }
 
-    function testDelete() {
-
+    public function testDelete()
+    {
         $request = new HTTP\Request('DELETE', '/test.txt');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(204, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertFalse(file_exists($this->tempDir . '/test.txt'));
-
+        $this->assertFalse(file_exists($this->tempDir.'/test.txt'));
     }
 
-    function testDeleteDirectory() {
-
-        mkdir($this->tempDir . '/testcol');
-        file_put_contents($this->tempDir . '/testcol/test.txt', 'Hi! I\'m a file with a short lifespan');
+    public function testDeleteDirectory()
+    {
+        mkdir($this->tempDir.'/testcol');
+        file_put_contents($this->tempDir.'/testcol/test.txt', 'Hi! I\'m a file with a short lifespan');
 
         $request = new HTTP\Request('DELETE', '/testcol');
         $this->server->httpRequest = ($request);
@@ -157,37 +150,35 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
         ], $this->response->getHeaders());
         $this->assertEquals(204, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertFalse(file_exists($this->tempDir . '/testcol'));
-
+        $this->assertFalse(file_exists($this->tempDir.'/testcol'));
     }
 
-    function testOptions() {
-
+    public function testOptions()
+    {
         $request = new HTTP\Request('OPTIONS', '/');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
-            'DAV'             => ['1, 3, extended-mkcol'],
-            'MS-Author-Via'   => ['DAV'],
-            'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
-            'Accept-Ranges'   => ['bytes'],
-            'Content-Length'  => ['0'],
+            'DAV' => ['1, 3, extended-mkcol'],
+            'MS-Author-Via' => ['DAV'],
+            'Allow' => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
+            'Accept-Ranges' => ['bytes'],
+            'Content-Length' => ['0'],
             'X-Sabre-Version' => [DAV\Version::VERSION],
         ], $this->response->getHeaders());
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals('', $this->response->body);
-
     }
 
-    function testMove() {
-
-        mkdir($this->tempDir . '/testcol');
+    public function testMove()
+    {
+        mkdir($this->tempDir.'/testcol');
 
         $request = new HTTP\Request('MOVE', '/test.txt', ['Destination' => '/testcol/test2.txt']);
         $this->server->httpRequest = ($request);
@@ -197,15 +188,13 @@ class ServerTest extends DAV\AbstractServer{
         $this->assertEquals('', $this->response->body);
 
         $this->assertEquals([
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
             'X-Sabre-Version' => [DAV\Version::VERSION],
         ], $this->response->getHeaders());
 
         $this->assertTrue(
-            is_file($this->tempDir . '/testcol/test2.txt')
+            is_file($this->tempDir.'/testcol/test2.txt')
         );
-
-
     }
 
     /**
@@ -215,14 +204,14 @@ class ServerTest extends DAV\AbstractServer{
      * The moveInto function *should* ignore the object and let sabredav itself
      * execute the slow move.
      */
-    function testMoveOtherObject() {
-
-        mkdir($this->tempDir . '/tree1');
-        mkdir($this->tempDir . '/tree2');
+    public function testMoveOtherObject()
+    {
+        mkdir($this->tempDir.'/tree1');
+        mkdir($this->tempDir.'/tree2');
 
         $tree = new DAV\Tree(new DAV\SimpleCollection('root', [
-            new DAV\FS\Directory($this->tempDir . '/tree1'),
-            new DAV\FSExt\Directory($this->tempDir . '/tree2'),
+            new DAV\FS\Directory($this->tempDir.'/tree1'),
+            new DAV\FSExt\Directory($this->tempDir.'/tree2'),
         ]));
         $this->server->tree = $tree;
 
@@ -234,13 +223,32 @@ class ServerTest extends DAV\AbstractServer{
         $this->assertEquals('', $this->response->body);
 
         $this->assertEquals([
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
             'X-Sabre-Version' => [DAV\Version::VERSION],
         ], $this->response->getHeaders());
 
         $this->assertTrue(
-            is_dir($this->tempDir . '/tree2/tree1')
+            is_dir($this->tempDir.'/tree2/tree1')
         );
+    }
+
+    public function testCopy()
+    {
+        mkdir($this->tempDir.'/testcol');
+
+        $request = new HTTP\Request('COPY', '/test.txt', ['Destination' => '/testcol/test2.txt']);
+        $this->server->httpRequest = ($request);
+        $this->server->exec();
+
+        $this->assertEquals(201, $this->response->status);
+        $this->assertEquals('', $this->response->body);
+
+        $this->assertEquals([
+            'Content-Length' => ['0'],
+            'X-Sabre-Version' => [DAV\Version::VERSION],
+        ], $this->response->getHeaders());
 
+        $this->assertTrue(is_file($this->tempDir.'/test.txt'));
+        $this->assertTrue(is_file($this->tempDir.'/testcol/test2.txt'));
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/HTTPPreferParsingTest.php b/vendor/sabre/dav/tests/Sabre/DAV/HTTPPreferParsingTest.php
index cd8bee968..d0ff77eb4 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/HTTPPreferParsingTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/HTTPPreferParsingTest.php
@@ -1,88 +1,85 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
-class HTTPPreferParsingTest extends \Sabre\DAVServerTest {
-
-    function testParseSimple() {
-
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_PREFER' => 'return-asynch',
+class HTTPPreferParsingTest extends \Sabre\DAVServerTest
+{
+    public function assertParseResult($input, $expected)
+    {
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'Prefer' => $input,
         ]);
 
         $server = new Server();
         $server->httpRequest = $httpRequest;
 
-        $this->assertEquals([
-            'respond-async' => true,
-            'return'        => null,
-            'handling'      => null,
-            'wait'          => null,
-        ], $server->getHTTPPrefer());
-
+        $this->assertEquals(
+            $expected,
+            $server->getHTTPPrefer()
+        );
     }
 
-    function testParseValue() {
-
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_PREFER' => 'wait=10',
-        ]);
-
-        $server = new Server();
-        $server->httpRequest = $httpRequest;
-
-        $this->assertEquals([
-            'respond-async' => false,
-            'return'        => null,
-            'handling'      => null,
-            'wait'          => '10',
-        ], $server->getHTTPPrefer());
-
+    public function testParseSimple()
+    {
+        $this->assertParseResult(
+            'return-asynch',
+            [
+                'respond-async' => true,
+                'return' => null,
+                'handling' => null,
+                'wait' => null,
+            ]
+        );
     }
 
-    function testParseMultiple() {
-
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_PREFER' => 'return-minimal, strict,lenient',
-        ]);
-
-        $server = new Server();
-        $server->httpRequest = $httpRequest;
-
-        $this->assertEquals([
-            'respond-async' => false,
-            'return'        => 'minimal',
-            'handling'      => 'lenient',
-            'wait'          => null,
-        ], $server->getHTTPPrefer());
-
+    public function testParseValue()
+    {
+        $this->assertParseResult(
+            'wait=10',
+            [
+                'respond-async' => false,
+                'return' => null,
+                'handling' => null,
+                'wait' => '10',
+            ]
+        );
     }
 
-    function testParseWeirdValue() {
-
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_PREFER' => 'BOOOH',
-        ]);
-
-        $server = new Server();
-        $server->httpRequest = $httpRequest;
-
-        $this->assertEquals([
-            'respond-async' => false,
-            'return'        => null,
-            'handling'      => null,
-            'wait'          => null,
-            'boooh'         => true,
-        ], $server->getHTTPPrefer());
-
+    public function testParseMultiple()
+    {
+        $this->assertParseResult(
+            'return-minimal, strict,lenient',
+            [
+                'respond-async' => false,
+                'return' => 'minimal',
+                'handling' => 'lenient',
+                'wait' => null,
+            ]
+        );
     }
 
-    function testBrief() {
+    public function testParseWeirdValue()
+    {
+        $this->assertParseResult(
+            'BOOOH',
+            [
+                'respond-async' => false,
+                'return' => null,
+                'handling' => null,
+                'wait' => null,
+                'boooh' => true,
+            ]
+        );
+    }
 
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_BRIEF' => 't',
+    public function testBrief()
+    {
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'Brief' => 't',
         ]);
 
         $server = new Server();
@@ -90,24 +87,19 @@ class HTTPPreferParsingTest extends \Sabre\DAVServerTest {
 
         $this->assertEquals([
             'respond-async' => false,
-            'return'        => 'minimal',
-            'handling'      => null,
-            'wait'          => null,
+            'return' => 'minimal',
+            'handling' => null,
+            'wait' => null,
         ], $server->getHTTPPrefer());
-
     }
 
     /**
-     * propfindMinimal
-     *
-     * @return void
+     * propfindMinimal.
      */
-    function testpropfindMinimal() {
-
-        $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD' => 'PROPFIND',
-            'REQUEST_URI'    => '/',
-            'HTTP_PREFER'    => 'return-minimal',
+    public function testpropfindMinimal()
+    {
+        $request = new HTTP\Request('PROPFIND', '/', [
+            'Prefer' => 'return-minimal',
         ]);
         $request->setBody(<<<BLA
 <?xml version="1.0"?>
@@ -126,13 +118,12 @@ BLA
 
         $this->assertEquals(207, $response->getStatus(), $body);
 
-        $this->assertTrue(strpos($body, 'resourcetype') !== false, $body);
-        $this->assertTrue(strpos($body, 'something') === false, $body);
-
+        $this->assertTrue(false !== strpos($body, 'resourcetype'), $body);
+        $this->assertTrue(false === strpos($body, 'something'), $body);
     }
 
-    function testproppatchMinimal() {
-
+    public function testproppatchMinimal()
+    {
         $request = new HTTP\Request('PROPPATCH', '/', ['Prefer' => 'return-minimal']);
         $request->setBody(<<<BLA
 <?xml version="1.0"?>
@@ -146,23 +137,20 @@ BLA
 BLA
         );
 
-        $this->server->on('propPatch', function($path, PropPatch $propPatch) {
-
-            $propPatch->handle('{DAV:}something', function($props) {
+        $this->server->on('propPatch', function ($path, PropPatch $propPatch) {
+            $propPatch->handle('{DAV:}something', function ($props) {
                 return true;
             });
-
         });
 
         $response = $this->request($request);
 
-        $this->assertEquals(0, strlen($response->body), 'Expected empty body: ' . $response->body);
+        $this->assertEquals('', $response->getBodyAsString(), 'Expected empty body: '.$response->body);
         $this->assertEquals(204, $response->status);
-
     }
 
-    function testproppatchMinimalError() {
-
+    public function testproppatchMinimalError()
+    {
         $request = new HTTP\Request('PROPPATCH', '/', ['Prefer' => 'return-minimal']);
         $request->setBody(<<<BLA
 <?xml version="1.0"?>
@@ -181,8 +169,7 @@ BLA
         $body = $response->getBodyAsString();
 
         $this->assertEquals(207, $response->status);
-        $this->assertTrue(strpos($body, 'something') !== false);
-        $this->assertTrue(strpos($body, '403 Forbidden') !== false, $body);
-
+        $this->assertTrue(false !== strpos($body, 'something'));
+        $this->assertTrue(false !== strpos($body, '403 Forbidden'), $body);
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php b/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php
index bd1b33150..f70febabd 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\DAVServerTest;
@@ -12,30 +14,27 @@ use Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class HttpDeleteTest extends DAVServerTest {
-
+class HttpDeleteTest extends DAVServerTest
+{
     /**
      * Sets up the DAV tree.
-     *
-     * @return void
      */
-    function setUpTree() {
-
+    public function setUpTree()
+    {
         $this->tree = new Mock\Collection('root', [
             'file1' => 'foo',
-            'dir'   => [
-                'subfile'  => 'bar',
+            'dir' => [
+                'subfile' => 'bar',
                 'subfile2' => 'baz',
             ],
         ]);
-
     }
 
     /**
-     * A successful DELETE
+     * A successful DELETE.
      */
-    function testDelete() {
-
+    public function testDelete()
+    {
         $request = new HTTP\Request('DELETE', '/file1');
 
         $response = $this->request($request);
@@ -43,24 +42,23 @@ class HttpDeleteTest extends DAVServerTest {
         $this->assertEquals(
             204,
             $response->getStatus(),
-            "Incorrect status code. Response body:  " . $response->getBodyAsString()
+            'Incorrect status code. Response body:  '.$response->getBodyAsString()
         );
 
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
+                'Content-Length' => ['0'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
-     * Deleting a Directory
+     * Deleting a Directory.
      */
-    function testDeleteDirectory() {
-
+    public function testDeleteDirectory()
+    {
         $request = new HTTP\Request('DELETE', '/dir');
 
         $response = $this->request($request);
@@ -68,42 +66,40 @@ class HttpDeleteTest extends DAVServerTest {
         $this->assertEquals(
             204,
             $response->getStatus(),
-            "Incorrect status code. Response body:  " . $response->getBodyAsString()
+            'Incorrect status code. Response body:  '.$response->getBodyAsString()
         );
 
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
+                'Content-Length' => ['0'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
-     * DELETE on a node that does not exist
+     * DELETE on a node that does not exist.
      */
-    function testDeleteNotFound() {
-
+    public function testDeleteNotFound()
+    {
         $request = new HTTP\Request('DELETE', '/file2');
         $response = $this->request($request);
 
         $this->assertEquals(
             404,
             $response->getStatus(),
-            "Incorrect status code. Response body:  " . $response->getBodyAsString()
+            'Incorrect status code. Response body:  '.$response->getBodyAsString()
         );
-
     }
 
     /**
-     * DELETE with preconditions
+     * DELETE with preconditions.
      */
-    function testDeletePreconditions() {
-
+    public function testDeletePreconditions()
+    {
         $request = new HTTP\Request('DELETE', '/file1', [
-            'If-Match' => '"' . md5('foo') . '"',
+            'If-Match' => '"'.md5('foo').'"',
         ]);
 
         $response = $this->request($request);
@@ -111,18 +107,17 @@ class HttpDeleteTest extends DAVServerTest {
         $this->assertEquals(
             204,
             $response->getStatus(),
-            "Incorrect status code. Response body:  " . $response->getBodyAsString()
+            'Incorrect status code. Response body:  '.$response->getBodyAsString()
         );
-
     }
 
     /**
-     * DELETE with incorrect preconditions
+     * DELETE with incorrect preconditions.
      */
-    function testDeletePreconditionsFailed() {
-
+    public function testDeletePreconditionsFailed()
+    {
         $request = new HTTP\Request('DELETE', '/file1', [
-            'If-Match' => '"' . md5('bar') . '"',
+            'If-Match' => '"'.md5('bar').'"',
         ]);
 
         $response = $this->request($request);
@@ -130,8 +125,7 @@ class HttpDeleteTest extends DAVServerTest {
         $this->assertEquals(
             412,
             $response->getStatus(),
-            "Incorrect status code. Response body:  " . $response->getBodyAsString()
+            'Incorrect status code. Response body:  '.$response->getBodyAsString()
         );
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php b/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php
index 86480b1c2..d3932a4c6 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\DAVServerTest;
@@ -12,31 +14,28 @@ use Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class HttpPutTest extends DAVServerTest {
-
+class HttpPutTest extends DAVServerTest
+{
     /**
      * Sets up the DAV tree.
-     *
-     * @return void
      */
-    function setUpTree() {
-
+    public function setUpTree()
+    {
         $this->tree = new Mock\Collection('root', [
             'file1' => 'foo',
         ]);
-
     }
 
     /**
      * A successful PUT of a new file.
      */
-    function testPut() {
-
+    public function testPut()
+    {
         $request = new HTTP\Request('PUT', '/file2', [], 'hello');
 
         $response = $this->request($request);
 
-        $this->assertEquals(201, $response->getStatus(), 'Incorrect status code received. Full response body:' . $response->getBodyAsString());
+        $this->assertEquals(201, $response->getStatus(), 'Incorrect status code received. Full response body:'.$response->getBodyAsString());
 
         $this->assertEquals(
             'hello',
@@ -46,12 +45,11 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
-                'ETag'            => ['"' . md5('hello') . '"']
+                'Content-Length' => ['0'],
+                'ETag' => ['"'.md5('hello').'"'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
@@ -59,8 +57,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testPutExisting() {
-
+    public function testPutExisting()
+    {
         $request = new HTTP\Request('PUT', '/file1', [], 'bar');
 
         $response = $this->request($request);
@@ -75,21 +73,20 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
-                'ETag'            => ['"' . md5('bar') . '"']
+                'Content-Length' => ['0'],
+                'ETag' => ['"'.md5('bar').'"'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
-     * PUT on existing file with If-Match: *
+     * PUT on existing file with If-Match: *.
      *
      * @depends testPutExisting
      */
-    function testPutExistingIfMatchStar() {
-
+    public function testPutExistingIfMatchStar()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file1',
@@ -109,25 +106,24 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
-                'ETag'            => ['"' . md5('hello') . '"']
+                'Content-Length' => ['0'],
+                'ETag' => ['"'.md5('hello').'"'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
-     * PUT on existing file with If-Match: with a correct etag
+     * PUT on existing file with If-Match: with a correct etag.
      *
      * @depends testPutExisting
      */
-    function testPutExistingIfMatchCorrect() {
-
+    public function testPutExistingIfMatchCorrect()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file1',
-            ['If-Match' => '"' . md5('foo') . '"'],
+            ['If-Match' => '"'.md5('foo').'"'],
             'hello'
         );
 
@@ -143,12 +139,11 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
-                'ETag'            => ['"' . md5('hello') . '"'],
+                'Content-Length' => ['0'],
+                'ETag' => ['"'.md5('hello').'"'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
@@ -156,8 +151,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testPutContentRange() {
-
+    public function testPutContentRange()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file2',
@@ -167,7 +162,6 @@ class HttpPutTest extends DAVServerTest {
 
         $response = $this->request($request);
         $this->assertEquals(400, $response->getStatus());
-
     }
 
     /**
@@ -175,8 +169,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testPutIfNoneMatchStar() {
-
+    public function testPutIfNoneMatchStar()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file2',
@@ -196,12 +190,11 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
-                'ETag'            => ['"' . md5('hello') . '"']
+                'Content-Length' => ['0'],
+                'ETag' => ['"'.md5('hello').'"'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
@@ -209,8 +202,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testPutIfMatchStar() {
-
+    public function testPutIfMatchStar()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file2',
@@ -221,7 +214,6 @@ class HttpPutTest extends DAVServerTest {
         $response = $this->request($request);
 
         $this->assertEquals(412, $response->getStatus());
-
     }
 
     /**
@@ -229,8 +221,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testPutExistingIfNoneMatchStar() {
-
+    public function testPutExistingIfNoneMatchStar()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file1',
@@ -242,7 +234,6 @@ class HttpPutTest extends DAVServerTest {
         $response = $this->request($request);
 
         $this->assertEquals(412, $response->getStatus());
-
     }
 
     /**
@@ -250,8 +241,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testPutNoParent() {
-
+    public function testPutNoParent()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file1/file2',
@@ -261,7 +252,6 @@ class HttpPutTest extends DAVServerTest {
 
         $response = $this->request($request);
         $this->assertEquals(409, $response->getStatus());
-
     }
 
     /**
@@ -271,8 +261,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testFinderPutSuccess() {
-
+    public function testFinderPutSuccess()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file2',
@@ -291,12 +281,11 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length'  => ['0'],
-                'ETag'            => ['"' . md5('hello') . '"'],
+                'Content-Length' => ['0'],
+                'ETag' => ['"'.md5('hello').'"'],
             ],
             $response->getHeaders()
         );
-
     }
 
     /**
@@ -304,8 +293,8 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testFinderPutSuccess
      */
-    function testFinderPutFail() {
-
+    public function testFinderPutFail()
+    {
         $request = new HTTP\Request(
             'PUT',
             '/file2',
@@ -316,7 +305,6 @@ class HttpPutTest extends DAVServerTest {
         $response = $this->request($request);
 
         $this->assertEquals(403, $response->getStatus());
-
     }
 
     /**
@@ -324,17 +312,18 @@ class HttpPutTest extends DAVServerTest {
      *
      * @depends testPut
      */
-    function testPutIntercept() {
-
-        $this->server->on('beforeBind', function($uri) {
+    public function testPutIntercept()
+    {
+        $this->server->on('beforeBind', function ($uri) {
             $this->server->httpResponse->setStatus(418);
+
             return false;
         });
 
         $request = new HTTP\Request('PUT', '/file2', [], 'hello');
         $response = $this->request($request);
 
-        $this->assertEquals(418, $response->getStatus(), 'Incorrect status code received. Full response body: ' . $response->getBodyAsString());
+        $this->assertEquals(418, $response->getStatus(), 'Incorrect status code received. Full response body: '.$response->getBodyAsString());
 
         $this->assertFalse(
             $this->server->tree->nodeExists('file2')
@@ -343,7 +332,5 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
         ], $response->getHeaders());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php b/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php
index ba2cf3dc1..500ad6147 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php
@@ -1,34 +1,32 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
 require_once 'Sabre/TestUtil.php';
 
-class Issue33Test extends \PHPUnit_Framework_TestCase {
-
-    function setUp() {
-
+class Issue33Test extends \PHPUnit\Framework\TestCase
+{
+    public function setUp()
+    {
         \Sabre\TestUtil::clearTempDir();
-
     }
 
-    function testCopyMoveInfo() {
-
+    public function testCopyMoveInfo()
+    {
         $bar = new SimpleCollection('bar');
         $root = new SimpleCollection('webdav', [$bar]);
 
         $server = new Server($root);
         $server->setBaseUri('/webdav/');
 
-        $serverVars = [
-            'REQUEST_URI'      => '/webdav/bar',
-            'HTTP_DESTINATION' => 'http://dev2.tribalos.com/webdav/%C3%A0fo%C3%B3',
-            'HTTP_OVERWRITE'   => 'F',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('GET', '/webdav/bar', [
+            'Destination' => 'http://dev2.tribalos.com/webdav/%C3%A0fo%C3%B3',
+            'Overwrite' => 'F',
+        ]);
 
         $server->httpRequest = $request;
 
@@ -37,13 +35,12 @@ class Issue33Test extends \PHPUnit_Framework_TestCase {
         $this->assertEquals('%C3%A0fo%C3%B3', urlencode($info['destination']));
         $this->assertFalse($info['destinationExists']);
         $this->assertFalse($info['destinationNode']);
-
     }
 
-    function testTreeMove() {
-
-        mkdir(SABRE_TEMPDIR . '/issue33');
-        $dir = new FS\Directory(SABRE_TEMPDIR . '/issue33');
+    public function testTreeMove()
+    {
+        mkdir(SABRE_TEMPDIR.'/issue33');
+        $dir = new FS\Directory(SABRE_TEMPDIR.'/issue33');
 
         $dir->createDirectory('bar');
 
@@ -52,40 +49,34 @@ class Issue33Test extends \PHPUnit_Framework_TestCase {
 
         $node = $tree->getNodeForPath(urldecode('%C3%A0fo%C3%B3'));
         $this->assertEquals(urldecode('%C3%A0fo%C3%B3'), $node->getName());
-
     }
 
-    function testDirName() {
-
+    public function testDirName()
+    {
         $dirname1 = 'bar';
         $dirname2 = urlencode('%C3%A0fo%C3%B3');
 
         $this->assertTrue(dirname($dirname1) == dirname($dirname2));
-
     }
 
     /**
      * @depends testTreeMove
      * @depends testCopyMoveInfo
      */
-    function testEverything() {
+    public function testEverything()
+    {
+        $request = new HTTP\Request('MOVE', '/webdav/bar', [
+            'Destination' => 'http://dev2.tribalos.com/webdav/%C3%A0fo%C3%B3',
+            'Overwrite' => 'F',
+        ]);
 
-        // Request object
-        $serverVars = [
-            'REQUEST_METHOD'   => 'MOVE',
-            'REQUEST_URI'      => '/webdav/bar',
-            'HTTP_DESTINATION' => 'http://dev2.tribalos.com/webdav/%C3%A0fo%C3%B3',
-            'HTTP_OVERWRITE'   => 'F',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('');
 
         $response = new HTTP\ResponseMock();
 
         // Server setup
-        mkdir(SABRE_TEMPDIR . '/issue33');
-        $dir = new FS\Directory(SABRE_TEMPDIR . '/issue33');
+        mkdir(SABRE_TEMPDIR.'/issue33');
+        $dir = new FS\Directory(SABRE_TEMPDIR.'/issue33');
 
         $dir->createDirectory('bar');
 
@@ -99,8 +90,6 @@ class Issue33Test extends \PHPUnit_Framework_TestCase {
         $server->sapi = new HTTP\SapiMock();
         $server->exec();
 
-        $this->assertTrue(file_exists(SABRE_TEMPDIR . '/issue33/' . urldecode('%C3%A0fo%C3%B3')));
-
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/issue33/'.urldecode('%C3%A0fo%C3%B3')));
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php
index bbde69097..d1cd1799c 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php
@@ -1,29 +1,31 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks\Backend;
 
 use Sabre\DAV;
 
-abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
-
+abstract class AbstractTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @abstract
+     *
      * @return AbstractBackend
      */
-    abstract function getBackend();
-
-    function testSetup() {
-
-       $backend = $this->getBackend();
-       $this->assertInstanceOf('Sabre\\DAV\\Locks\\Backend\\AbstractBackend', $backend);
+    abstract public function getBackend();
 
+    public function testSetup()
+    {
+        $backend = $this->getBackend();
+        $this->assertInstanceOf('Sabre\\DAV\\Locks\\Backend\\AbstractBackend', $backend);
     }
 
     /**
      * @depends testSetup
      */
-    function testGetLocks() {
-
+    public function testGetLocks()
+    {
         $backend = $this->getBackend();
 
         $lock = new DAV\Locks\LockInfo();
@@ -40,14 +42,13 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(1, count($locks));
         $this->assertEquals('Sinterklaas', $locks[0]->owner);
         $this->assertEquals('someuri', $locks[0]->uri);
-
     }
 
     /**
      * @depends testGetLocks
      */
-    function testGetLocksParent() {
-
+    public function testGetLocksParent()
+    {
         $backend = $this->getBackend();
 
         $lock = new DAV\Locks\LockInfo();
@@ -64,15 +65,13 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(1, count($locks));
         $this->assertEquals('Sinterklaas', $locks[0]->owner);
         $this->assertEquals('someuri', $locks[0]->uri);
-
     }
 
-
     /**
      * @depends testGetLocks
      */
-    function testGetLocksParentDepth0() {
-
+    public function testGetLocksParentDepth0()
+    {
         $backend = $this->getBackend();
 
         $lock = new DAV\Locks\LockInfo();
@@ -87,11 +86,10 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
         $locks = $backend->getLocks('someuri/child', false);
 
         $this->assertEquals(0, count($locks));
-
     }
 
-    function testGetLocksChildren() {
-
+    public function testGetLocksChildren()
+    {
         $backend = $this->getBackend();
 
         $lock = new DAV\Locks\LockInfo();
@@ -111,14 +109,13 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $locks = $backend->getLocks('someuri', true);
         $this->assertEquals(1, count($locks));
-
     }
 
     /**
      * @depends testGetLocks
      */
-    function testLockRefresh() {
-
+    public function testLockRefresh()
+    {
         $backend = $this->getBackend();
 
         $lock = new DAV\Locks\LockInfo();
@@ -139,14 +136,13 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals('Santa Clause', $locks[0]->owner);
         $this->assertEquals('someuri', $locks[0]->uri);
-
     }
 
     /**
      * @depends testGetLocks
      */
-    function testUnlock() {
-
+    public function testUnlock()
+    {
         $backend = $this->getBackend();
 
         $lock = new DAV\Locks\LockInfo();
@@ -164,14 +160,13 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $locks = $backend->getLocks('someuri', false);
         $this->assertEquals(0, count($locks));
-
     }
 
     /**
      * @depends testUnlock
      */
-    function testUnlockUnknownToken() {
-
+    public function testUnlockUnknownToken()
+    {
         $backend = $this->getBackend();
 
         $lock = new DAV\Locks\LockInfo();
@@ -190,7 +185,5 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $locks = $backend->getLocks('someuri', false);
         $this->assertEquals(1, count($locks));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/FileTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/FileTest.php
index 537996f3b..50f17a7dd 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/FileTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/FileTest.php
@@ -1,24 +1,23 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks\Backend;
 
 require_once 'Sabre/TestUtil.php';
 
-class FileTest extends AbstractTest {
-
-    function getBackend() {
-
+class FileTest extends AbstractTest
+{
+    public function getBackend()
+    {
         \Sabre\TestUtil::clearTempDir();
-        $backend = new File(SABRE_TEMPDIR . '/lockdb');
-        return $backend;
+        $backend = new File(SABRE_TEMPDIR.'/lockdb');
 
+        return $backend;
     }
 
-
-    function tearDown() {
-
+    public function tearDown()
+    {
         \Sabre\TestUtil::clearTempDir();
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php
index 0ba02fc8b..86ffc0bb3 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\DAV\Locks\Backend;
+declare(strict_types=1);
 
-class PDOMySQLTest extends PDOTest {
+namespace Sabre\DAV\Locks\Backend;
 
+class PDOMySQLTest extends PDOTest
+{
     public $driver = 'mysql';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php
index a27eae93c..f5ed98f50 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php
@@ -1,20 +1,20 @@
 <?php
 
-namespace Sabre\DAV\Locks\Backend;
+declare(strict_types=1);
 
-abstract class PDOTest extends AbstractTest {
+namespace Sabre\DAV\Locks\Backend;
 
+abstract class PDOTest extends AbstractTest
+{
     use \Sabre\DAV\DbTestHelperTrait;
 
-    function getBackend() {
-
+    public function getBackend()
+    {
         $this->dropTables('locks');
         $this->createSchema('locks');
 
         $pdo = $this->getPDO();
 
         return new PDO($pdo);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php
index 1111db5b5..a2a31e87f 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks;
 
 use Sabre\DAV;
@@ -8,22 +10,21 @@ use Sabre\HTTP;
 require_once 'Sabre/HTTP/ResponseMock.php';
 require_once 'Sabre/TestUtil.php';
 
-class MSWordTest extends \PHPUnit_Framework_TestCase {
-
-    function tearDown() {
-
+class MSWordTest extends \PHPUnit\Framework\TestCase
+{
+    public function tearDown()
+    {
         \Sabre\TestUtil::clearTempDir();
-
     }
 
-    function testLockEtc() {
-
-        mkdir(SABRE_TEMPDIR . '/mstest');
-        $tree = new DAV\FS\Directory(SABRE_TEMPDIR . '/mstest');
+    public function testLockEtc()
+    {
+        mkdir(SABRE_TEMPDIR.'/mstest');
+        $tree = new DAV\FS\Directory(SABRE_TEMPDIR.'/mstest');
 
         $server = new DAV\Server($tree);
         $server->debugExceptions = true;
-        $locksBackend = new Backend\File(SABRE_TEMPDIR . '/locksdb');
+        $locksBackend = new Backend\File(SABRE_TEMPDIR.'/locksdb');
         $locksPlugin = new Plugin($locksBackend);
         $server->addPlugin($locksPlugin);
 
@@ -34,8 +35,8 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
         $server->sapi = new HTTP\SapiMock();
         $server->exec();
 
-        $this->assertEquals(201, $server->httpResponse->getStatus(), 'Full response body:' . $response1->getBodyAsString());
-        $this->assertTrue(!!$server->httpResponse->getHeaders('Lock-Token'));
+        $this->assertEquals(201, $server->httpResponse->getStatus(), 'Full response body:'.$response1->getBodyAsString());
+        $this->assertTrue((bool) $server->httpResponse->getHeaders('Lock-Token'));
         $lockToken = $server->httpResponse->getHeader('Lock-Token');
 
         //sleep(10);
@@ -47,7 +48,7 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(201, $server->httpResponse->status);
-        $this->assertTrue(!!$server->httpResponse->getHeaders('Lock-Token'));
+        $this->assertTrue((bool) $server->httpResponse->getHeaders('Lock-Token'));
 
         //sleep(10);
 
@@ -57,16 +58,15 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(204, $server->httpResponse->status);
-
     }
 
-    function getLockRequest() {
-
+    public function getLockRequest()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-           'REQUEST_METHOD'    => 'LOCK',
+           'REQUEST_METHOD' => 'LOCK',
            'HTTP_CONTENT_TYPE' => 'application/xml',
-           'HTTP_TIMEOUT'      => 'Second-3600',
-           'REQUEST_URI'       => '/Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
+           'HTTP_TIMEOUT' => 'Second-3600',
+           'REQUEST_URI' => '/Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
         ]);
 
         $request->setBody('<D:lockinfo xmlns:D="DAV:">
@@ -82,15 +82,15 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
 </D:lockinfo>');
 
         return $request;
-
     }
-    function getLockRequest2() {
 
+    public function getLockRequest2()
+    {
         $request = HTTP\Sapi::createFromServerArray([
-           'REQUEST_METHOD'    => 'LOCK',
+           'REQUEST_METHOD' => 'LOCK',
            'HTTP_CONTENT_TYPE' => 'application/xml',
-           'HTTP_TIMEOUT'      => 'Second-3600',
-           'REQUEST_URI'       => '/~$Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
+           'HTTP_TIMEOUT' => 'Second-3600',
+           'REQUEST_URI' => '/~$Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
         ]);
 
         $request->setBody('<D:lockinfo xmlns:D="DAV:">
@@ -106,19 +106,17 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
 </D:lockinfo>');
 
         return $request;
-
     }
 
-    function getPutRequest($lockToken) {
-
+    public function getPutRequest($lockToken)
+    {
         $request = HTTP\Sapi::createFromServerArray([
            'REQUEST_METHOD' => 'PUT',
-           'REQUEST_URI'    => '/Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
-           'HTTP_IF'        => 'If: (' . $lockToken . ')',
+           'REQUEST_URI' => '/Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
+           'HTTP_IF' => 'If: ('.$lockToken.')',
         ]);
         $request->setBody('FAKE BODY');
-        return $request;
 
+        return $request;
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php
index dbbf6757a..b3a0ac9af 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Locks;
 
 use Sabre\DAV;
@@ -7,63 +9,58 @@ use Sabre\HTTP;
 
 require_once 'Sabre/DAV/AbstractServer.php';
 
-class PluginTest extends DAV\AbstractServer {
-
+class PluginTest extends DAV\AbstractServer
+{
     /**
      * @var Plugin
      */
     protected $locksPlugin;
 
-    function setUp() {
-
+    public function setUp()
+    {
         parent::setUp();
-        $locksBackend = new Backend\File(SABRE_TEMPDIR . '/locksdb');
+        $locksBackend = new Backend\File(SABRE_TEMPDIR.'/locksdb');
         $locksPlugin = new Plugin($locksBackend);
         $this->server->addPlugin($locksPlugin);
         $this->locksPlugin = $locksPlugin;
-
     }
 
-    function testGetInfo() {
-
+    public function testGetInfo()
+    {
         $this->assertArrayHasKey(
             'name',
             $this->locksPlugin->getPluginInfo()
         );
-
     }
 
-    function testGetFeatures() {
-
+    public function testGetFeatures()
+    {
         $this->assertEquals([2], $this->locksPlugin->getFeatures());
-
     }
 
-    function testGetHTTPMethods() {
-
+    public function testGetHTTPMethods()
+    {
         $this->assertEquals(['LOCK', 'UNLOCK'], $this->locksPlugin->getHTTPMethods(''));
-
     }
 
-    function testLockNoBody() {
-
+    public function testLockNoBody()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
             ],
             $this->response->getHeaders()
          );
 
         $this->assertEquals(400, $this->response->status);
-
     }
 
-    function testLock() {
-
+    public function testLock()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
@@ -78,11 +75,11 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
-        $this->assertEquals(200, $this->response->status, 'Got an incorrect status back. Response body: ' . $this->response->body);
+        $this->assertEquals(200, $this->response->status, 'Got an incorrect status back. Response body: '.$this->response->body);
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", 'xmlns\\1="urn:DAV"', $this->response->body);
         $xml = simplexml_load_string($body);
         $xml->registerXPathNamespace('d', 'urn:DAV');
 
@@ -105,22 +102,21 @@ class PluginTest extends DAV\AbstractServer {
 
         foreach ($elements as $elem) {
             $data = $xml->xpath($elem);
-            $this->assertEquals(1, count($data), 'We expected 1 match for the xpath expression "' . $elem . '". ' . count($data) . ' were found. Full response body: ' . $this->response->body);
+            $this->assertEquals(1, count($data), 'We expected 1 match for the xpath expression "'.$elem.'". '.count($data).' were found. Full response body: '.$this->response->body);
         }
 
         $depth = $xml->xpath('/d:prop/d:lockdiscovery/d:activelock/d:depth');
-        $this->assertEquals('infinity', (string)$depth[0]);
+        $this->assertEquals('infinity', (string) $depth[0]);
 
         $token = $xml->xpath('/d:prop/d:lockdiscovery/d:activelock/d:locktoken/d:href');
-        $this->assertEquals($this->response->getHeader('Lock-Token'), '<' . (string)$token[0] . '>', 'Token in response body didn\'t match token in response header.');
-
+        $this->assertEquals($this->response->getHeader('Lock-Token'), '<'.(string) $token[0].'>', 'Token in response body didn\'t match token in response header.');
     }
 
     /**
      * @depends testLock
      */
-    function testDoubleLock() {
-
+    public function testDoubleLock()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
@@ -141,15 +137,14 @@ class PluginTest extends DAV\AbstractServer {
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
-        $this->assertEquals(423, $this->response->status, 'Full response: ' . $this->response->body);
-
+        $this->assertEquals(423, $this->response->status, 'Full response: '.$this->response->body);
     }
 
     /**
      * @depends testLock
      */
-    function testLockRefresh() {
-
+    public function testLockRefresh()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
@@ -168,7 +163,7 @@ class PluginTest extends DAV\AbstractServer {
         $this->response = new HTTP\ResponseMock();
         $this->server->httpResponse = $this->response;
 
-        $request = new HTTP\Request('LOCK', '/test.txt', ['If' => '(' . $lockToken . ')']);
+        $request = new HTTP\Request('LOCK', '/test.txt', ['If' => '('.$lockToken.')']);
         $request->setBody('');
 
         $this->server->httpRequest = $request;
@@ -176,15 +171,14 @@ class PluginTest extends DAV\AbstractServer {
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
-        $this->assertEquals(200, $this->response->status, 'We received an incorrect status code. Full response body: ' . $this->response->getBody());
-
+        $this->assertEquals(200, $this->response->status, 'We received an incorrect status code. Full response body: '.$this->response->getBody());
     }
 
     /**
      * @depends testLock
      */
-    function testLockRefreshBadToken() {
-
+    public function testLockRefreshBadToken()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
@@ -203,7 +197,7 @@ class PluginTest extends DAV\AbstractServer {
         $this->response = new HTTP\ResponseMock();
         $this->server->httpResponse = $this->response;
 
-        $request = new HTTP\Request('LOCK', '/test.txt', ['If' => '(' . $lockToken . 'foobar) (<opaquelocktoken:anotherbadtoken>)']);
+        $request = new HTTP\Request('LOCK', '/test.txt', ['If' => '('.$lockToken.'foobar) (<opaquelocktoken:anotherbadtoken>)']);
         $request->setBody('');
 
         $this->server->httpRequest = $request;
@@ -211,15 +205,14 @@ class PluginTest extends DAV\AbstractServer {
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
-        $this->assertEquals(423, $this->response->getStatus(), 'We received an incorrect status code. Full response body: ' . $this->response->getBody());
-
+        $this->assertEquals(423, $this->response->getStatus(), 'We received an incorrect status code. Full response body: '.$this->response->getBody());
     }
 
     /**
      * @depends testLock
      */
-    function testLockNoFile() {
-
+    public function testLockNoFile()
+    {
         $request = new HTTP\Request('LOCK', '/notfound.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
@@ -234,57 +227,54 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(201, $this->response->status);
-
     }
 
     /**
      * @depends testLock
      */
-    function testUnlockNoToken() {
-
+    public function testUnlockNoToken()
+    {
         $request = new HTTP\Request('UNLOCK', '/test.txt');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
             ],
             $this->response->getHeaders()
          );
 
         $this->assertEquals(400, $this->response->status);
-
     }
 
     /**
      * @depends testLock
      */
-    function testUnlockBadToken() {
-
+    public function testUnlockBadToken()
+    {
         $request = new HTTP\Request('UNLOCK', '/test.txt', ['Lock-Token' => '<opaquelocktoken:blablabla>']);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
             ],
             $this->response->getHeaders()
          );
 
-        $this->assertEquals(409, $this->response->status, 'Got an incorrect status code. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(409, $this->response->status, 'Got an incorrect status code. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testLock
      */
-    function testLockPutNoToken() {
-
+    public function testLockPutNoToken()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
@@ -299,7 +289,7 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
@@ -309,17 +299,16 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(423, $this->response->status);
-
     }
 
     /**
      * @depends testLock
      */
-    function testUnlock() {
-
+    public function testUnlock()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $this->server->httpRequest = $request;
 
@@ -340,22 +329,20 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpResponse = new HTTP\ResponseMock();
         $this->server->invokeMethod($request, $this->server->httpResponse);
 
-        $this->assertEquals(204, $this->server->httpResponse->status, 'Got an incorrect status code. Full response body: ' . $this->response->body);
+        $this->assertEquals(204, $this->server->httpResponse->status, 'Got an incorrect status code. Full response body: '.$this->response->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
             ],
             $this->server->httpResponse->getHeaders()
          );
-
-
     }
 
     /**
      * @depends testLock
      */
-    function testUnlockWindowsBug() {
-
+    public function testUnlockWindowsBug()
+    {
         $request = new HTTP\Request('LOCK', '/test.txt');
         $this->server->httpRequest = $request;
 
@@ -379,26 +366,21 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpResponse = new HTTP\ResponseMock();
         $this->server->invokeMethod($request, $this->server->httpResponse);
 
-        $this->assertEquals(204, $this->server->httpResponse->status, 'Got an incorrect status code. Full response body: ' . $this->response->body);
+        $this->assertEquals(204, $this->server->httpResponse->status, 'Got an incorrect status code. Full response body: '.$this->response->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
             ],
             $this->server->httpResponse->getHeaders()
          );
-
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockRetainOwner() {
-
-        $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI'    => '/test.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ]);
+    public function testLockRetainOwner()
+    {
+        $request = new HTTP\Request('LOCK', '/test.txt');
         $this->server->httpRequest = $request;
 
         $request->setBody('<?xml version="1.0"?>
@@ -414,21 +396,14 @@ class PluginTest extends DAV\AbstractServer {
         $locks = $this->locksPlugin->getLocks('test.txt');
         $this->assertEquals(1, count($locks));
         $this->assertEquals('Evert', $locks[0]->owner);
-
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockPutBadToken() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/test.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockPutBadToken()
+    {
+        $request = new HTTP\Request('LOCK', '/test.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -442,40 +417,30 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'    => '/test.txt',
-            'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF'        => '(<opaquelocktoken:token1>)',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('PUT', '/test.txt', [
+            'If' => '(<opaquelocktoken:token1>)',
+        ]);
         $request->setBody('newbody');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         // $this->assertEquals('412 Precondition failed',$this->response->status);
         $this->assertEquals(423, $this->response->status);
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockDeleteParent() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockDeleteParent()
+    {
+        $request = new HTTP\Request('LOCK', '/dir/child.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -489,34 +454,24 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'    => '/dir',
-            'REQUEST_METHOD' => 'DELETE',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('DELETE', '/dir');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(423, $this->response->status);
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-
     }
+
     /**
      * @depends testLock
      */
-    function testLockDeleteSucceed() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockDeleteSucceed()
+    {
+        $request = new HTTP\Request('LOCK', '/dir/child.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -530,36 +485,26 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'DELETE',
-            'HTTP_IF'        => '(' . $this->response->getHeader('Lock-Token') . ')',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('DELETE', '/dir/child.txt', [
+            'If' => '('.$this->response->getHeader('Lock-Token').')',
+        ]);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(204, $this->response->status);
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockCopyLockSource() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockCopyLockSource()
+    {
+        $request = new HTTP\Request('LOCK', '/dir/child.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -573,35 +518,27 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'      => '/dir/child.txt',
-            'REQUEST_METHOD'   => 'COPY',
-            'HTTP_DESTINATION' => '/dir/child2.txt',
-        ];
+        $request = new HTTP\Request('COPY', '/dir/child.txt', [
+            'Destination' => '/dir/child2.txt',
+        ]);
 
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(201, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-
     }
+
     /**
      * @depends testLock
      */
-    function testLockCopyLockDestination() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child2.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockCopyLockDestination()
+    {
+        $request = new HTTP\Request('LOCK', '/dir/child2.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -615,36 +552,26 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(201, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'      => '/dir/child.txt',
-            'REQUEST_METHOD'   => 'COPY',
-            'HTTP_DESTINATION' => '/dir/child2.txt',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('COPY', '/dir/child.txt', [
+            'Destination' => '/dir/child2.txt',
+        ]);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(423, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockMoveLockSourceLocked() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockMoveLockSourceLocked()
+    {
+        $request = new HTTP\Request('LOCK', '/dir/child.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -658,36 +585,26 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'      => '/dir/child.txt',
-            'REQUEST_METHOD'   => 'MOVE',
-            'HTTP_DESTINATION' => '/dir/child2.txt',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('MOVE', '/dir/child.txt', [
+            'Destination' => '/dir/child2.txt',
+        ]);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(423, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockMoveLockSourceSucceed() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockMoveLockSourceSucceed()
+    {
+        $request = new HTTP\Request('LOCK', '/dir/child.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -701,36 +618,26 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'      => '/dir/child.txt',
-            'REQUEST_METHOD'   => 'MOVE',
-            'HTTP_DESTINATION' => '/dir/child2.txt',
-            'HTTP_IF'          => '(' . $this->response->getHeader('Lock-Token') . ')',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('MOVE', '/dir/child.txt', [
+            'Destination' => '/dir/child2.txt',
+            'If' => '('.$this->response->getHeader('Lock-Token').')',
+        ]);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(201, $this->response->status, 'A valid lock-token was provided for the source, so this MOVE operation must succeed. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(201, $this->response->status, 'A valid lock-token was provided for the source, so this MOVE operation must succeed. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testLock
      */
-    function testLockMoveLockDestination() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir/child2.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockMoveLockDestination()
+    {
+        $request = new HTTP\Request('LOCK', '/dir/child2.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -744,36 +651,28 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(201, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'      => '/dir/child.txt',
-            'REQUEST_METHOD'   => 'MOVE',
-            'HTTP_DESTINATION' => '/dir/child2.txt',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('MOVE', '/dir/child.txt', [
+            'Destination' => '/dir/child2.txt',
+        ]);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(423, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-
     }
+
     /**
      * @depends testLock
      */
-    function testLockMoveLockParent() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir',
-            'REQUEST_METHOD' => 'LOCK',
-            'HTTP_DEPTH'     => 'infinite',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockMoveLockParent()
+    {
+        $request = new HTTP\Request('LOCK', '/dir', [
+            'Depth' => 'infinite',
+        ]);
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -787,37 +686,27 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'      => '/dir/child.txt',
-            'REQUEST_METHOD'   => 'MOVE',
-            'HTTP_DESTINATION' => '/dir/child2.txt',
-            'HTTP_IF'          => '</dir> (' . $this->response->getHeader('Lock-Token') . ')',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('MOVE', '/dir/child.txt', [
+            'Destination' => '/dir/child2.txt',
+            'If' => '</dir> ('.$this->response->getHeader('Lock-Token').')',
+        ]);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(201, $this->response->status, 'We locked the parent of both the source and destination, but the move didn\'t succeed.');
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockPutGoodToken() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/test.txt',
-            'REQUEST_METHOD' => 'LOCK',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testLockPutGoodToken()
+    {
+        $request = new HTTP\Request('LOCK', '/test.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
     <D:lockscope><D:exclusive/></D:lockscope>
@@ -831,33 +720,28 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = [
-            'REQUEST_URI'    => '/test.txt',
-            'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF'        => '(' . $this->response->getHeader('Lock-Token') . ')',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('PUT', '/test.txt', [
+            'If' => '('.$this->response->getHeader('Lock-Token').')',
+        ]);
         $request->setBody('newbody');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(204, $this->response->status);
-
     }
 
     /**
      * @depends testLock
      */
-    function testLockPutUnrelatedToken() {
-
+    public function testLockPutUnrelatedToken()
+    {
         $request = new HTTP\Request('LOCK', '/unrelated.txt');
         $request->setBody('<?xml version="1.0"?>
 <D:lockinfo xmlns:D="DAV:">
@@ -872,132 +756,109 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(201, $this->response->getStatus());
 
         $request = new HTTP\Request(
             'PUT',
             '/test.txt',
-            ['If' => '</unrelated.txt> (' . $this->response->getHeader('Lock-Token') . ')']
+            ['If' => '</unrelated.txt> ('.$this->response->getHeader('Lock-Token').')']
         );
         $request->setBody('newbody');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
 
         $this->assertEquals(204, $this->response->status);
-
     }
 
-    function testPutWithIncorrectETag() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/test.txt',
-            'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF'        => '(["etag1"])',
-        ];
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testPutWithIncorrectETag()
+    {
+        $request = new HTTP\Request('PUT', '/test.txt', [
+            'If' => '(["etag1"])',
+        ]);
         $request->setBody('newbody');
         $this->server->httpRequest = $request;
         $this->server->exec();
         $this->assertEquals(412, $this->response->status);
-
     }
 
     /**
      * @depends testPutWithIncorrectETag
      */
-    function testPutWithCorrectETag() {
-
+    public function testPutWithCorrectETag()
+    {
         // We need an ETag-enabled file node.
         $tree = new DAV\Tree(new DAV\FSExt\Directory(SABRE_TEMPDIR));
         $this->server->tree = $tree;
 
-        $filename = SABRE_TEMPDIR . '/test.txt';
+        $filename = SABRE_TEMPDIR.'/test.txt';
         $etag = sha1(
-            fileinode($filename) .
-            filesize($filename) .
+            fileinode($filename).
+            filesize($filename).
             filemtime($filename)
         );
-        $serverVars = [
-            'REQUEST_URI'    => '/test.txt',
-            'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF'        => '(["' . $etag . '"])',
-        ];
 
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+        $request = new HTTP\Request('PUT', '/test.txt', [
+            'If' => '(["'.$etag.'"])',
+        ]);
         $request->setBody('newbody');
+
         $this->server->httpRequest = $request;
         $this->server->exec();
-        $this->assertEquals(204, $this->response->status, 'Incorrect status received. Full response body:' . $this->response->body);
-
+        $this->assertEquals(204, $this->response->status, 'Incorrect status received. Full response body:'.$this->response->body);
     }
 
-    function testDeleteWithETagOnCollection() {
-
-        $serverVars = [
-            'REQUEST_URI'    => '/dir',
-            'REQUEST_METHOD' => 'DELETE',
-            'HTTP_IF'        => '(["etag1"])',
-        ];
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testDeleteWithETagOnCollection()
+    {
+        $request = new HTTP\Request('DELETE', '/dir', [
+            'If' => '(["etag1"])',
+        ]);
 
         $this->server->httpRequest = $request;
         $this->server->exec();
         $this->assertEquals(412, $this->response->status);
-
     }
 
-    function testGetTimeoutHeader() {
-
-        $request = HTTP\Sapi::createFromServerArray([
-            'HTTP_TIMEOUT' => 'second-100',
+    public function testGetTimeoutHeader()
+    {
+        $request = new HTTP\Request('LOCK', '/foo/bar', [
+            'Timeout' => 'second-100',
         ]);
 
         $this->server->httpRequest = $request;
         $this->assertEquals(100, $this->locksPlugin->getTimeoutHeader());
-
     }
 
-    function testGetTimeoutHeaderTwoItems() {
-
-        $request = HTTP\Sapi::createFromServerArray([
-            'HTTP_TIMEOUT' => 'second-5, infinite',
+    public function testGetTimeoutHeaderTwoItems()
+    {
+        $request = new HTTP\Request('LOCK', '/foo/bar', [
+            'Timeout' => 'second-5, infinite',
         ]);
-
         $this->server->httpRequest = $request;
         $this->assertEquals(5, $this->locksPlugin->getTimeoutHeader());
-
     }
 
-    function testGetTimeoutHeaderInfinite() {
-
-        $request = HTTP\Sapi::createFromServerArray([
-            'HTTP_TIMEOUT' => 'infinite, second-5',
+    public function testGetTimeoutHeaderInfinite()
+    {
+        $request = new HTTP\Request('LOCK', '/foo/bar', [
+            'Timeout' => 'infinite, second-5',
         ]);
-
         $this->server->httpRequest = $request;
         $this->assertEquals(LockInfo::TIMEOUT_INFINITE, $this->locksPlugin->getTimeoutHeader());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\BadRequest
+     * @expectedException \Sabre\DAV\Exception\BadRequest
      */
-    function testGetTimeoutHeaderInvalid() {
-
-        $request = HTTP\Sapi::createFromServerArray([
-            'HTTP_TIMEOUT' => 'yourmom',
-        ]);
+    public function testGetTimeoutHeaderInvalid()
+    {
+        $request = new HTTP\Request('GET', '/', ['Timeout' => 'yourmom']);
 
         $this->server->httpRequest = $request;
         $this->locksPlugin->getTimeoutHeader();
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Mock/Collection.php b/vendor/sabre/dav/tests/Sabre/DAV/Mock/Collection.php
index fded5e474..e0bdecc09 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Mock/Collection.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Mock/Collection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Mock;
 
 use Sabre\DAV;
@@ -19,22 +21,21 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Collection extends DAV\Collection {
-
+class Collection extends DAV\Collection
+{
     protected $name;
     protected $children;
     protected $parent;
 
     /**
-     * Creates the object
+     * Creates the object.
      *
-     * @param string $name
-     * @param array $children
+     * @param string     $name
+     * @param array      $children
      * @param Collection $parent
-     * @return void
      */
-    function __construct($name, array $children = [], Collection $parent = null) {
-
+    public function __construct($name, array $children = [], Collection $parent = null)
+    {
         $this->name = $name;
         foreach ($children as $key => $value) {
             if (is_string($value)) {
@@ -48,7 +49,6 @@ class Collection extends DAV\Collection {
             }
         }
         $this->parent = $parent;
-
     }
 
     /**
@@ -58,14 +58,13 @@ class Collection extends DAV\Collection {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->name;
-
     }
 
     /**
-     * Creates a new file in the directory
+     * Creates a new file in the directory.
      *
      * Data will either be supplied as a stream resource, or in certain cases
      * as a string. Keep in mind that you may have to support either.
@@ -84,41 +83,39 @@ class Collection extends DAV\Collection {
      * return the same contents of what was submitted here, you are strongly
      * recommended to omit the ETag.
      *
-     * @param string $name Name of the file
+     * @param string          $name Name of the file
      * @param resource|string $data Initial payload
-     * @return null|string
+     *
+     * @return string|null
      */
-    function createFile($name, $data = null) {
-
+    public function createFile($name, $data = '')
+    {
         if (is_resource($data)) {
             $data = stream_get_contents($data);
         }
         $this->children[] = new File($name, $data, $this);
-        return '"' . md5($data) . '"';
 
+        return '"'.md5($data).'"';
     }
 
     /**
-     * Creates a new subdirectory
+     * Creates a new subdirectory.
      *
      * @param string $name
-     * @return void
      */
-    function createDirectory($name) {
-
+    public function createDirectory($name)
+    {
         $this->children[] = new self($name);
-
     }
 
     /**
-     * Returns an array with all the child nodes
+     * Returns an array with all the child nodes.
      *
      * @return \Sabre\DAV\INode[]
      */
-    function getChildren() {
-
+    public function getChildren()
+    {
         return $this->children;
-
     }
 
     /**
@@ -126,43 +123,35 @@ class Collection extends DAV\Collection {
      *
      * @param \Sabre\DAV\INode $node
      */
-    function addNode(\Sabre\DAV\INode $node) {
-
+    public function addNode(\Sabre\DAV\INode $node)
+    {
         $this->children[] = $node;
-
     }
 
     /**
      * Removes a childnode from this node.
      *
      * @param string $name
-     * @return void
      */
-    function deleteChild($name) {
-
+    public function deleteChild($name)
+    {
         foreach ($this->children as $key => $value) {
-
             if ($value->getName() == $name) {
                 unset($this->children[$key]);
+
                 return;
             }
-
         }
-
     }
 
     /**
      * Deletes this collection and all its children,.
-     *
-     * @return void
      */
-    function delete() {
-
+    public function delete()
+    {
         foreach ($this->getChildren() as $child) {
             $this->deleteChild($child->getName());
         }
         $this->parent->deleteChild($this->getName());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Mock/File.php b/vendor/sabre/dav/tests/Sabre/DAV/Mock/File.php
index a624b6b6b..d48ddaa92 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Mock/File.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Mock/File.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Mock;
 
 use Sabre\DAV;
 
 /**
- * Mock File
+ * Mock File.
  *
  * See the Collection in this directory for more details.
  *
@@ -13,34 +15,32 @@ use Sabre\DAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class File extends DAV\File {
-
+class File extends DAV\File
+{
     protected $name;
     protected $contents;
     protected $parent;
     protected $lastModified;
 
     /**
-     * Creates the object
+     * Creates the object.
      *
-     * @param string $name
-     * @param resource $contents
+     * @param string     $name
+     * @param resource   $contents
      * @param Collection $parent
-     * @param int $lastModified
-     * @return void
+     * @param int        $lastModified
      */
-    function __construct($name, $contents, Collection $parent = null, $lastModified = -1) {
-
+    public function __construct($name, $contents, Collection $parent = null, $lastModified = -1)
+    {
         $this->name = $name;
         $this->put($contents);
         $this->parent = $parent;
 
-        if ($lastModified === -1) {
+        if (-1 === $lastModified) {
             $lastModified = time();
         }
 
         $this->lastModified = $lastModified;
-
     }
 
     /**
@@ -50,26 +50,23 @@ class File extends DAV\File {
      *
      * @return string
      */
-    function getName() {
-
+    public function getName()
+    {
         return $this->name;
-
     }
 
     /**
      * Changes the name of the node.
      *
      * @param string $name
-     * @return void
      */
-    function setName($name) {
-
+    public function setName($name)
+    {
         $this->name = $name;
-
     }
 
     /**
-     * Updates the data
+     * Updates the data.
      *
      * The data argument is a readable stream resource.
      *
@@ -86,66 +83,59 @@ class File extends DAV\File {
      * return an ETag, and just return null.
      *
      * @param resource $data
+     *
      * @return string|null
      */
-    function put($data) {
-
+    public function put($data)
+    {
         if (is_resource($data)) {
             $data = stream_get_contents($data);
         }
         $this->contents = $data;
-        return '"' . md5($data) . '"';
 
+        return '"'.md5($data).'"';
     }
 
     /**
-     * Returns the data
+     * Returns the data.
      *
      * This method may either return a string or a readable stream resource
      *
      * @return mixed
      */
-    function get() {
-
+    public function get()
+    {
         return $this->contents;
-
     }
 
     /**
-     * Returns the ETag for a file
+     * Returns the ETag for a file.
      *
      * An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
      *
      * Return null if the ETag can not effectively be determined
-     *
-     * @return void
      */
-    function getETag() {
-
-        return '"' . md5($this->contents) . '"';
-
+    public function getETag()
+    {
+        return '"'.md5($this->contents).'"';
     }
 
     /**
-     * Returns the size of the node, in bytes
+     * Returns the size of the node, in bytes.
      *
      * @return int
      */
-    function getSize() {
-
+    public function getSize()
+    {
         return strlen($this->contents);
-
     }
 
     /**
-     * Delete the node
-     *
-     * @return void
+     * Delete the node.
      */
-    function delete() {
-
+    public function delete()
+    {
         $this->parent->deleteChild($this->name);
-
     }
 
     /**
@@ -154,10 +144,8 @@ class File extends DAV\File {
      *
      * @return int
      */
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return $this->lastModified;
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php
index 3213fcb1b..c993e609d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\Mount;
 
 use Sabre\DAV;
@@ -7,19 +9,18 @@ use Sabre\HTTP;
 
 require_once 'Sabre/DAV/AbstractServer.php';
 
-class PluginTest extends DAV\AbstractServer {
-
-    function setUp() {
-
+class PluginTest extends DAV\AbstractServer
+{
+    public function setUp()
+    {
         parent::setUp();
         $this->server->addPlugin(new Plugin());
-
     }
 
-    function testPassThrough() {
-
+    public function testPassThrough()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'GET',
         ];
 
@@ -27,17 +28,16 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(501, $this->response->status, 'We expected GET to not be implemented for Directories. Response body: ' . $this->response->body);
-
+        $this->assertEquals(501, $this->response->status, 'We expected GET to not be implemented for Directories. Response body: '.$this->response->body);
     }
 
-    function testMountResponse() {
-
+    public function testMountResponse()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/?mount',
+            'REQUEST_URI' => '/?mount',
             'REQUEST_METHOD' => 'GET',
-            'QUERY_STRING'   => 'mount',
-            'HTTP_HOST'      => 'example.org',
+            'QUERY_STRING' => 'mount',
+            'HTTP_HOST' => 'example.org',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -47,12 +47,10 @@ class PluginTest extends DAV\AbstractServer {
         $this->assertEquals(200, $this->response->status);
 
         $xml = simplexml_load_string($this->response->body);
-        $this->assertInstanceOf('SimpleXMLElement', $xml, 'Response was not a valid xml document. The list of errors:' . print_r(libxml_get_errors(), true) . '. xml body: ' . $this->response->body . '. What type we got: ' . gettype($xml) . ' class, if object: ' . get_class($xml));
+        $this->assertInstanceOf('SimpleXMLElement', $xml, 'Response was not a valid xml document. The list of errors:'.print_r(libxml_get_errors(), true).'. xml body: '.$this->response->body.'. What type we got: '.gettype($xml).' class, if object: '.get_class($xml));
 
         $xml->registerXPathNamespace('dm', 'http://purl.org/NET/webdav/mount');
         $url = $xml->xpath('//dm:url');
-        $this->assertEquals('http://example.org/', (string)$url[0]);
-
+        $this->assertEquals('http://example.org/', (string) $url[0]);
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php
index 15289ce52..6b6652967 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php
@@ -1,100 +1,92 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 require_once 'Sabre/TestUtil.php';
 
-class ObjectTreeTest extends \PHPUnit_Framework_TestCase {
-
+class ObjectTreeTest extends \PHPUnit\Framework\TestCase
+{
     protected $tree;
 
-    function setup() {
-
+    public function setup()
+    {
         \Sabre\TestUtil::clearTempDir();
-        mkdir(SABRE_TEMPDIR . '/root');
-        mkdir(SABRE_TEMPDIR . '/root/subdir');
-        file_put_contents(SABRE_TEMPDIR . '/root/file.txt', 'contents');
-        file_put_contents(SABRE_TEMPDIR . '/root/subdir/subfile.txt', 'subcontents');
-        $rootNode = new FSExt\Directory(SABRE_TEMPDIR . '/root');
+        mkdir(SABRE_TEMPDIR.'/root');
+        mkdir(SABRE_TEMPDIR.'/root/subdir');
+        file_put_contents(SABRE_TEMPDIR.'/root/file.txt', 'contents');
+        file_put_contents(SABRE_TEMPDIR.'/root/subdir/subfile.txt', 'subcontents');
+        $rootNode = new FSExt\Directory(SABRE_TEMPDIR.'/root');
         $this->tree = new Tree($rootNode);
-
     }
 
-    function teardown() {
-
+    public function teardown()
+    {
         \Sabre\TestUtil::clearTempDir();
-
     }
 
-    function testGetRootNode() {
-
+    public function testGetRootNode()
+    {
         $root = $this->tree->getNodeForPath('');
         $this->assertInstanceOf('Sabre\\DAV\\FSExt\\Directory', $root);
-
     }
 
-    function testGetSubDir() {
-
+    public function testGetSubDir()
+    {
         $root = $this->tree->getNodeForPath('subdir');
         $this->assertInstanceOf('Sabre\\DAV\\FSExt\\Directory', $root);
-
     }
 
-    function testCopyFile() {
-
-       $this->tree->copy('file.txt', 'file2.txt');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/file2.txt'));
-       $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR . '/root/file2.txt'));
-
+    public function testCopyFile()
+    {
+        $this->tree->copy('file.txt', 'file2.txt');
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/file2.txt'));
+        $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR.'/root/file2.txt'));
     }
 
     /**
      * @depends testCopyFile
      */
-    function testCopyDirectory() {
-
-       $this->tree->copy('subdir', 'subdir2');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2'));
-       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
-       $this->assertEquals('subcontents', file_get_contents(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
-
+    public function testCopyDirectory()
+    {
+        $this->tree->copy('subdir', 'subdir2');
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2'));
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
+        $this->assertEquals('subcontents', file_get_contents(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
     }
 
     /**
      * @depends testCopyFile
      */
-    function testMoveFile() {
-
-       $this->tree->move('file.txt', 'file2.txt');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/file2.txt'));
-       $this->assertFalse(file_exists(SABRE_TEMPDIR . '/root/file.txt'));
-       $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR . '/root/file2.txt'));
-
+    public function testMoveFile()
+    {
+        $this->tree->move('file.txt', 'file2.txt');
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/file2.txt'));
+        $this->assertFalse(file_exists(SABRE_TEMPDIR.'/root/file.txt'));
+        $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR.'/root/file2.txt'));
     }
 
     /**
      * @depends testMoveFile
      */
-    function testMoveFileNewParent() {
-
-       $this->tree->move('file.txt', 'subdir/file2.txt');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir/file2.txt'));
-       $this->assertFalse(file_exists(SABRE_TEMPDIR . '/root/file.txt'));
-       $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR . '/root/subdir/file2.txt'));
-
+    public function testMoveFileNewParent()
+    {
+        $this->tree->move('file.txt', 'subdir/file2.txt');
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir/file2.txt'));
+        $this->assertFalse(file_exists(SABRE_TEMPDIR.'/root/file.txt'));
+        $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR.'/root/subdir/file2.txt'));
     }
 
     /**
      * @depends testCopyDirectory
      */
-    function testMoveDirectory() {
-
-       $this->tree->move('subdir', 'subdir2');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2'));
-       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
-       $this->assertFalse(file_exists(SABRE_TEMPDIR . '/root/subdir'));
-       $this->assertEquals('subcontents', file_get_contents(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
-
+    public function testMoveDirectory()
+    {
+        $this->tree->move('subdir', 'subdir2');
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2'));
+        $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
+        $this->assertFalse(file_exists(SABRE_TEMPDIR.'/root/subdir'));
+        $this->assertEquals('subcontents', file_get_contents(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php
index eff1e7d67..72fdb5ec8 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php
@@ -1,20 +1,21 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PartialUpdate;
 
 use Sabre\DAV;
 
-class FileMock implements IPatchSupport {
-
+class FileMock implements IPatchSupport
+{
     protected $data = '';
 
-    function put($str) {
-
+    public function put($str)
+    {
         if (is_resource($str)) {
             $str = stream_get_contents($str);
         }
         $this->data = $str;
-
     }
 
     /**
@@ -40,83 +41,71 @@ class FileMock implements IPatchSupport {
      * time.
      *
      * @param resource|string $data
-     * @param int $rangeType
-     * @param int $offset
+     * @param int             $rangeType
+     * @param int             $offset
+     *
      * @return string|null
      */
-    function patch($data, $rangeType, $offset = null) {
-
+    public function patch($data, $rangeType, $offset = null)
+    {
         if (is_resource($data)) {
             $data = stream_get_contents($data);
         }
 
         switch ($rangeType) {
-
-            case 1 :
+            case 1:
                 $this->data .= $data;
                 break;
-            case 3 :
+            case 3:
                 // Turn the offset into an offset-offset.
                 $offset = strlen($this->data) - $offset;
-                // No break is intentional
-            case 2 :
+                // no break is intentional
+            case 2:
                 $this->data =
-                    substr($this->data, 0, $offset) .
-                    $data .
+                    substr($this->data, 0, $offset).
+                    $data.
                     substr($this->data, $offset + strlen($data));
                 break;
-
         }
-
     }
 
-    function get() {
-
+    public function get()
+    {
         return $this->data;
-
     }
 
-    function getContentType() {
-
+    public function getContentType()
+    {
         return 'text/plain';
-
     }
 
-    function getSize() {
-
+    public function getSize()
+    {
         return strlen($this->data);
-
     }
 
-    function getETag() {
-
-        return '"' . $this->data . '"';
-
+    public function getETag()
+    {
+        return '"'.$this->data.'"';
     }
 
-    function delete() {
-
+    public function delete()
+    {
         throw new DAV\Exception\MethodNotAllowed();
-
     }
 
-    function setName($name) {
-
+    public function setName($name)
+    {
         throw new DAV\Exception\MethodNotAllowed();
-
     }
 
-    function getName() {
-
+    public function getName()
+    {
         return 'partial';
-
     }
 
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         return null;
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/PluginTest.php
index 5bd696416..63d692ec9 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/PluginTest.php
@@ -1,19 +1,20 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PartialUpdate;
 
-use Sabre\DAV;
 use Sabre\HTTP;
 
 require_once 'Sabre/DAV/PartialUpdate/FileMock.php';
 
-class PluginTest extends \Sabre\DAVServerTest {
-
+class PluginTest extends \Sabre\DAVServerTest
+{
     protected $node;
     protected $plugin;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->node = new FileMock();
         $this->tree[] = $this->node;
 
@@ -21,38 +22,33 @@ class PluginTest extends \Sabre\DAVServerTest {
 
         $this->plugin = new Plugin();
         $this->server->addPlugin($this->plugin);
-
-
-
     }
 
-    function testInit() {
-
+    public function testInit()
+    {
         $this->assertEquals('partialupdate', $this->plugin->getPluginName());
         $this->assertEquals(['sabredav-partialupdate'], $this->plugin->getFeatures());
         $this->assertEquals([
-            'PATCH'
+            'PATCH',
         ], $this->plugin->getHTTPMethods('partial'));
         $this->assertEquals([
         ], $this->plugin->getHTTPMethods(''));
-
     }
 
-    function testPatchNoRange() {
-
+    public function testPatchNoRange()
+    {
         $this->node->put('aaaaaaaa');
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PATCH',
-            'REQUEST_URI'    => '/partial',
+            'REQUEST_URI' => '/partial',
         ]);
         $response = $this->request($request);
 
-        $this->assertEquals(400, $response->status, 'Full response body:' . $response->body);
-
+        $this->assertEquals(400, $response->status, 'Full response body:'.$response->body);
     }
 
-    function testPatchNotSupported() {
-
+    public function testPatchNotSupported()
+    {
         $this->node->put('aaaaaaaa');
         $request = new HTTP\Request('PATCH', '/', ['X-Update-Range' => '3-4']);
         $request->setBody(
@@ -60,12 +56,11 @@ class PluginTest extends \Sabre\DAVServerTest {
         );
         $response = $this->request($request);
 
-        $this->assertEquals(405, $response->status, 'Full response body:' . $response->body);
-
+        $this->assertEquals(405, $response->status, 'Full response body:'.$response->body);
     }
 
-    function testPatchNoContentType() {
-
+    public function testPatchNoContentType()
+    {
         $this->node->put('aaaaaaaa');
         $request = new HTTP\Request('PATCH', '/partial', ['X-Update-Range' => 'bytes=3-4']);
         $request->setBody(
@@ -73,12 +68,11 @@ class PluginTest extends \Sabre\DAVServerTest {
         );
         $response = $this->request($request);
 
-        $this->assertEquals(415, $response->status, 'Full response body:' . $response->body);
-
+        $this->assertEquals(415, $response->status, 'Full response body:'.$response->body);
     }
 
-    function testPatchBadRange() {
-
+    public function testPatchBadRange()
+    {
         $this->node->put('aaaaaaaa');
         $request = new HTTP\Request('PATCH', '/partial', ['X-Update-Range' => 'bytes=3-4', 'Content-Type' => 'application/x-sabredav-partialupdate', 'Content-Length' => '3']);
         $request->setBody(
@@ -86,12 +80,11 @@ class PluginTest extends \Sabre\DAVServerTest {
         );
         $response = $this->request($request);
 
-        $this->assertEquals(416, $response->status, 'Full response body:' . $response->body);
-
+        $this->assertEquals(416, $response->status, 'Full response body:'.$response->body);
     }
 
-    function testPatchNoLength() {
-
+    public function testPatchNoLength()
+    {
         $this->node->put('aaaaaaaa');
         $request = new HTTP\Request('PATCH', '/partial', ['X-Update-Range' => 'bytes=3-5', 'Content-Type' => 'application/x-sabredav-partialupdate']);
         $request->setBody(
@@ -99,12 +92,11 @@ class PluginTest extends \Sabre\DAVServerTest {
         );
         $response = $this->request($request);
 
-        $this->assertEquals(411, $response->status, 'Full response body:' . $response->body);
-
+        $this->assertEquals(411, $response->status, 'Full response body:'.$response->body);
     }
 
-    function testPatchSuccess() {
-
+    public function testPatchSuccess()
+    {
         $this->node->put('aaaaaaaa');
         $request = new HTTP\Request('PATCH', '/partial', ['X-Update-Range' => 'bytes=3-5', 'Content-Type' => 'application/x-sabredav-partialupdate', 'Content-Length' => 3]);
         $request->setBody(
@@ -112,13 +104,12 @@ class PluginTest extends \Sabre\DAVServerTest {
         );
         $response = $this->request($request);
 
-        $this->assertEquals(204, $response->status, 'Full response body:' . $response->body);
+        $this->assertEquals(204, $response->status, 'Full response body:'.$response->body);
         $this->assertEquals('aaabbbaa', $this->node->get());
-
     }
 
-    function testPatchNoEndRange() {
-
+    public function testPatchNoEndRange()
+    {
         $this->node->put('aaaaa');
         $request = new HTTP\Request('PATCH', '/partial', ['X-Update-Range' => 'bytes=3-', 'Content-Type' => 'application/x-sabredav-partialupdate', 'Content-Length' => '3']);
         $request->setBody(
@@ -127,9 +118,7 @@ class PluginTest extends \Sabre\DAVServerTest {
 
         $response = $this->request($request);
 
-        $this->assertEquals(204, $response->getStatus(), 'Full response body:' . $response->getBodyAsString());
+        $this->assertEquals(204, $response->getStatus(), 'Full response body:'.$response->getBodyAsString());
         $this->assertEquals('aaabbb', $this->node->get());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php
index 2c6274173..56b2d576f 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV\PartialUpdate;
 
 use Sabre\DAV\FSExt\File;
@@ -12,14 +14,14 @@ use Sabre\HTTP;
  *
  * See: http://sabre.io/dav/http-patch/
  */
-class SpecificationTest extends \PHPUnit_Framework_TestCase {
-
+class SpecificationTest extends \PHPUnit\Framework\TestCase
+{
     protected $server;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $tree = [
-            new File(SABRE_TEMPDIR . '/foobar.txt')
+            new File(SABRE_TEMPDIR.'/foobar.txt'),
         ];
         $server = new Server($tree);
         $server->debugExceptions = true;
@@ -28,32 +30,30 @@ class SpecificationTest extends \PHPUnit_Framework_TestCase {
         $tree[0]->put('1234567890');
 
         $this->server = $server;
-
     }
 
-    function tearDown() {
-
+    public function tearDown()
+    {
         \Sabre\TestUtil::clearTempDir();
-
     }
 
     /**
      * @param string $headerValue
      * @param string $httpStatus
      * @param string $endResult
-     * @param int $contentLength
+     * @param int    $contentLength
      *
      * @dataProvider data
      */
-    function testUpdateRange($headerValue, $httpStatus, $endResult, $contentLength = 4) {
-
+    public function testUpdateRange($headerValue, $httpStatus, $endResult, $contentLength = 4)
+    {
         $headers = [
-            'Content-Type'   => 'application/x-sabredav-partialupdate',
+            'Content-Type' => 'application/x-sabredav-partialupdate',
             'X-Update-Range' => $headerValue,
         ];
 
         if ($contentLength) {
-            $headers['Content-Length'] = (string)$contentLength;
+            $headers['Content-Length'] = (string) $contentLength;
         }
 
         $request = new HTTP\Request('PATCH', '/foobar.txt', $headers, '----');
@@ -64,15 +64,14 @@ class SpecificationTest extends \PHPUnit_Framework_TestCase {
         $this->server->sapi = new HTTP\SapiMock();
         $this->server->exec();
 
-        $this->assertEquals($httpStatus, $this->server->httpResponse->status, 'Incorrect http status received: ' . $this->server->httpResponse->body);
+        $this->assertEquals($httpStatus, $this->server->httpResponse->status, 'Incorrect http status received: '.$this->server->httpResponse->body);
         if (!is_null($endResult)) {
-            $this->assertEquals($endResult, file_get_contents(SABRE_TEMPDIR . '/foobar.txt'));
+            $this->assertEquals($endResult, file_get_contents(SABRE_TEMPDIR.'/foobar.txt'));
         }
-
     }
 
-    function data() {
-
+    public function data()
+    {
         return [
             // Problems
             ['foo',       400, null],
@@ -86,9 +85,6 @@ class SpecificationTest extends \PHPUnit_Framework_TestCase {
             ['bytes=-2',  204, '12345678----'],
             ['bytes=2-',  204, '12----7890'],
             ['append',    204, '1234567890----'],
-
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php
index 42759647a..7d55ea02e 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php
@@ -1,36 +1,36 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
 require_once 'Sabre/DAV/AbstractServer.php';
 
-class ServerEventsTest extends AbstractServer {
-
+class ServerEventsTest extends AbstractServer
+{
     private $tempPath;
 
     private $exception;
 
-    function testAfterBind() {
-
+    public function testAfterBind()
+    {
         $this->server->on('afterBind', [$this, 'afterBindHandler']);
         $newPath = 'afterBind';
 
         $this->tempPath = '';
         $this->server->createFile($newPath, 'body');
         $this->assertEquals($newPath, $this->tempPath);
-
     }
 
-    function afterBindHandler($path) {
-
-       $this->tempPath = $path;
-
+    public function afterBindHandler($path)
+    {
+        $this->tempPath = $path;
     }
 
-    function testAfterResponse() {
-
+    public function testAfterResponse()
+    {
         $mock = $this->getMockBuilder('stdClass')
             ->setMethods(['afterResponseCallback'])
             ->getMock();
@@ -40,74 +40,65 @@ class ServerEventsTest extends AbstractServer {
 
         $this->server->httpRequest = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'GET',
-            'REQUEST_URI'    => '/test.txt',
+            'REQUEST_URI' => '/test.txt',
         ]);
 
         $this->server->exec();
-
     }
 
-    function testBeforeBindCancel() {
-
+    public function testBeforeBindCancel()
+    {
         $this->server->on('beforeBind', [$this, 'beforeBindCancelHandler']);
         $this->assertFalse($this->server->createFile('bla', 'body'));
 
         // Also testing put()
         $req = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI'    => '/barbar',
+            'REQUEST_URI' => '/barbar',
         ]);
 
         $this->server->httpRequest = $req;
         $this->server->exec();
 
         $this->assertEquals(500, $this->server->httpResponse->getStatus());
-
     }
 
-    function beforeBindCancelHandler($path) {
-
+    public function beforeBindCancelHandler($path)
+    {
         return false;
-
     }
 
-    function testException() {
-
+    public function testException()
+    {
         $this->server->on('exception', [$this, 'exceptionHandler']);
 
         $req = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'GET',
-            'REQUEST_URI'    => '/not/exisitng',
+            'REQUEST_URI' => '/not/exisitng',
         ]);
         $this->server->httpRequest = $req;
         $this->server->exec();
 
         $this->assertInstanceOf('Sabre\\DAV\\Exception\\NotFound', $this->exception);
-
     }
 
-    function exceptionHandler(Exception $exception) {
-
+    public function exceptionHandler(Exception $exception)
+    {
         $this->exception = $exception;
-
     }
 
-    function testMethod() {
-
+    public function testMethod()
+    {
         $k = 1;
-        $this->server->on('method', function($request, $response) use (&$k) {
-
-            $k += 1;
+        $this->server->on('method:*', function ($request, $response) use (&$k) {
+            ++$k;
 
             return false;
-
         });
-        $this->server->on('method', function($request, $response) use (&$k) {
-
+        $this->server->on('method:*', function ($request, $response) use (&$k) {
             $k += 2;
 
             return false;
-
         });
 
         try {
@@ -116,11 +107,10 @@ class ServerEventsTest extends AbstractServer {
                 new HTTP\Response(),
                 false
             );
-        } catch (Exception $e) {}
+        } catch (Exception $e) {
+        }
 
         // Fun fact, PHP 7.1 changes the order when sorting-by-callback.
         $this->assertTrue($k >= 2 && $k <= 3);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php
index 557eddbbc..8e5bc6a64 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php
@@ -1,91 +1,90 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
-class ServerMKCOLTest extends AbstractServer {
-
-    function testMkcol() {
-
+class ServerMKCOLTest extends AbstractServer
+{
+    public function testMkcol()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/testcol',
+            'REQUEST_URI' => '/testcol',
             'REQUEST_METHOD' => 'MKCOL',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
-        $request->setBody("");
+        $request->setBody('');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertTrue(is_dir($this->tempDir . '/testcol'));
-
+        $this->assertTrue(is_dir($this->tempDir.'/testcol'));
     }
 
     /**
      * @depends testMkcol
      */
-    function testMKCOLUnknownBody() {
-
+    public function testMKCOLUnknownBody()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/testcol',
+            'REQUEST_URI' => '/testcol',
             'REQUEST_METHOD' => 'MKCOL',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
-        $request->setBody("Hello");
+        $request->setBody('Hello');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(415, $this->response->status);
-
     }
 
     /**
      * @depends testMkcol
      */
-    function testMKCOLBrokenXML() {
-
+    public function testMKCOLBrokenXML()
+    {
         $serverVars = [
-            'REQUEST_URI'       => '/testcol',
-            'REQUEST_METHOD'    => 'MKCOL',
+            'REQUEST_URI' => '/testcol',
+            'REQUEST_METHOD' => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
-        $request->setBody("Hello");
+        $request->setBody('Hello');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(400, $this->response->getStatus(), $this->response->getBodyAsString());
-
     }
 
     /**
      * @depends testMkcol
      */
-    function testMKCOLUnknownXML() {
-
+    public function testMKCOLUnknownXML()
+    {
         $serverVars = [
-            'REQUEST_URI'       => '/testcol',
-            'REQUEST_METHOD'    => 'MKCOL',
+            'REQUEST_URI' => '/testcol',
+            'REQUEST_METHOD' => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
         ];
 
@@ -96,21 +95,20 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(400, $this->response->getStatus());
-
     }
 
     /**
      * @depends testMkcol
      */
-    function testMKCOLNoResourceType() {
-
+    public function testMKCOLNoResourceType()
+    {
         $serverVars = [
-            'REQUEST_URI'       => '/testcol',
-            'REQUEST_METHOD'    => 'MKCOL',
+            'REQUEST_URI' => '/testcol',
+            'REQUEST_METHOD' => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
         ];
 
@@ -128,21 +126,20 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
-        $this->assertEquals(400, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(400, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testMkcol
      */
-    function testMKCOLIncorrectResourceType() {
-
+    public function testMKCOLIncorrectResourceType()
+    {
         $serverVars = [
-            'REQUEST_URI'       => '/testcol',
-            'REQUEST_METHOD'    => 'MKCOL',
+            'REQUEST_URI' => '/testcol',
+            'REQUEST_METHOD' => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
         ];
 
@@ -160,21 +157,20 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
-        $this->assertEquals(403, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(403, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testMKCOLIncorrectResourceType
      */
-    function testMKCOLSuccess() {
-
+    public function testMKCOLSuccess()
+    {
         $serverVars = [
-            'REQUEST_URI'       => '/testcol',
-            'REQUEST_METHOD'    => 'MKCOL',
+            'REQUEST_URI' => '/testcol',
+            'REQUEST_METHOD' => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
         ];
 
@@ -192,21 +188,20 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
         ], $this->response->getHeaders());
 
-        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testMKCOLIncorrectResourceType
      */
-    function testMKCOLWhiteSpaceResourceType() {
-
+    public function testMKCOLWhiteSpaceResourceType()
+    {
         $serverVars = [
-            'REQUEST_URI'       => '/testcol',
-            'REQUEST_METHOD'    => 'MKCOL',
+            'REQUEST_URI' => '/testcol',
+            'REQUEST_METHOD' => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
         ];
 
@@ -226,20 +221,19 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Length'  => ['0'],
+            'Content-Length' => ['0'],
         ], $this->response->getHeaders());
 
-        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testMKCOLIncorrectResourceType
      */
-    function testMKCOLNoParent() {
-
+    public function testMKCOLNoParent()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/testnoparent/409me',
+            'REQUEST_URI' => '/testnoparent/409me',
             'REQUEST_METHOD' => 'MKCOL',
         ];
 
@@ -251,20 +245,19 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
-        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testMKCOLIncorrectResourceType
      */
-    function testMKCOLParentIsNoCollection() {
-
+    public function testMKCOLParentIsNoCollection()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/test.txt/409me',
+            'REQUEST_URI' => '/test.txt/409me',
             'REQUEST_METHOD' => 'MKCOL',
         ];
 
@@ -276,20 +269,19 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
-        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testMKCOLIncorrectResourceType
      */
-    function testMKCOLAlreadyExists() {
-
+    public function testMKCOLAlreadyExists()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/test.txt',
+            'REQUEST_URI' => '/test.txt',
             'REQUEST_METHOD' => 'MKCOL',
         ];
 
@@ -301,20 +293,19 @@ class ServerMKCOLTest extends AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
-            'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Allow' => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
         ], $this->response->getHeaders());
 
-        $this->assertEquals(405, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
-
+        $this->assertEquals(405, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
     }
 
     /**
      * @depends testMKCOLSuccess
      * @depends testMKCOLAlreadyExists
      */
-    function testMKCOLAndProps() {
-
+    public function testMKCOLAndProps()
+    {
         $request = new HTTP\Request(
             'MKCOL',
             '/testcol',
@@ -332,11 +323,11 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Wrong statuscode received. Full response body: '.$this->response->body);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
         $responseBody = $this->response->getBodyAsString();
@@ -360,7 +351,5 @@ XML;
             $expected,
             $responseBody
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php
index fa67102cc..35de59e37 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
@@ -7,44 +9,40 @@ use Sabre\HTTP;
 require_once 'Sabre/DAV/AbstractServer.php';
 require_once 'Sabre/DAV/TestPlugin.php';
 
-class ServerPluginTest extends AbstractServer {
-
+class ServerPluginTest extends AbstractServer
+{
     /**
      * @var Sabre\DAV\TestPlugin
      */
     protected $testPlugin;
 
-    function setUp() {
-
+    public function setUp()
+    {
         parent::setUp();
 
         $testPlugin = new TestPlugin();
         $this->server->addPlugin($testPlugin);
         $this->testPlugin = $testPlugin;
-
     }
 
-    /**
-     */
-    function testBaseClass() {
-
+    public function testBaseClass()
+    {
         $p = new ServerPluginMock();
         $this->assertEquals([], $p->getFeatures());
         $this->assertEquals([], $p->getHTTPMethods(''));
         $this->assertEquals(
             [
-                'name'        => 'Sabre\DAV\ServerPluginMock',
+                'name' => 'Sabre\DAV\ServerPluginMock',
                 'description' => null,
-                'link'        => null
+                'link' => null,
             ], $p->getPluginInfo()
         );
-
     }
 
-    function testOptions() {
-
+    public function testOptions()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'OPTIONS',
         ];
 
@@ -53,56 +51,49 @@ class ServerPluginTest extends AbstractServer {
         $this->server->exec();
 
         $this->assertEquals([
-            'DAV'             => ['1, 3, extended-mkcol, drinking'],
-            'MS-Author-Via'   => ['DAV'],
-            'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT, BEER, WINE'],
-            'Accept-Ranges'   => ['bytes'],
-            'Content-Length'  => ['0'],
+            'DAV' => ['1, 3, extended-mkcol, drinking'],
+            'MS-Author-Via' => ['DAV'],
+            'Allow' => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT, BEER, WINE'],
+            'Accept-Ranges' => ['bytes'],
+            'Content-Length' => ['0'],
             'X-Sabre-Version' => [Version::VERSION],
         ], $this->response->getHeaders());
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals('', $this->response->body);
         $this->assertEquals('OPTIONS', $this->testPlugin->beforeMethod);
-
-
     }
 
-    function testGetPlugin() {
-
+    public function testGetPlugin()
+    {
         $this->assertEquals($this->testPlugin, $this->server->getPlugin(get_class($this->testPlugin)));
-
     }
 
-    function testUnknownPlugin() {
-
+    public function testUnknownPlugin()
+    {
         $this->assertNull($this->server->getPlugin('SomeRandomClassName'));
-
     }
 
-    function testGetSupportedReportSet() {
-
+    public function testGetSupportedReportSet()
+    {
         $this->assertEquals([], $this->testPlugin->getSupportedReportSet('/'));
-
     }
 
-    function testGetPlugins() {
-
+    public function testGetPlugins()
+    {
         $this->assertEquals(
             [
                 get_class($this->testPlugin) => $this->testPlugin,
-                'core'                       => $this->server->getPlugin('core'),
+                'core' => $this->server->getPlugin('core'),
             ],
             $this->server->getPlugins()
         );
-
     }
-
-
 }
 
-class ServerPluginMock extends ServerPlugin {
-
-    function initialize(Server $s) { }
-
+class ServerPluginMock extends ServerPlugin
+{
+    public function initialize(Server $s)
+    {
+    }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php
index 203cf26d9..fa88e9095 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php
@@ -1,61 +1,55 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
-
+class ServerPreconditionsTest extends \PHPUnit\Framework\TestCase
+{
     /**
-     * @expectedException Sabre\DAV\Exception\PreconditionFailed
+     * @expectedException \Sabre\DAV\Exception\PreconditionFailed
      */
-    function testIfMatchNoNode() {
-
+    public function testIfMatchNoNode()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/bar', ['If-Match' => '*']);
         $httpResponse = new HTTP\Response();
         $server->checkPreconditions($httpRequest, $httpResponse);
-
     }
 
-    /**
-     */
-    function testIfMatchHasNode() {
-
+    public function testIfMatchHasNode()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '*']);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\PreconditionFailed
+     * @expectedException \Sabre\DAV\Exception\PreconditionFailed
      */
-    function testIfMatchWrongEtag() {
-
+    public function testIfMatchWrongEtag()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '1234']);
         $httpResponse = new HTTP\Response();
         $server->checkPreconditions($httpRequest, $httpResponse);
-
     }
 
-    /**
-     */
-    function testIfMatchCorrectEtag() {
-
+    public function testIfMatchCorrectEtag()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '"abc123"']);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
     /**
@@ -63,107 +57,89 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      *
      * @depends testIfMatchCorrectEtag
      */
-    function testIfMatchEvolutionEtag() {
-
+    public function testIfMatchEvolutionEtag()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '\\"abc123\\"']);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
-    /**
-     */
-    function testIfMatchMultiple() {
-
+    public function testIfMatchMultiple()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '"hellothere", "abc123"']);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
-    /**
-     */
-    function testIfNoneMatchNoNode() {
-
+    public function testIfNoneMatchNoNode()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/bar', ['If-None-Match' => '*']);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\PreconditionFailed
+     * @expectedException \Sabre\DAV\Exception\PreconditionFailed
      */
-    function testIfNoneMatchHasNode() {
-
+    public function testIfNoneMatchHasNode()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '*']);
         $httpResponse = new HTTP\Response();
         $server->checkPreconditions($httpRequest, $httpResponse);
-
     }
 
-    /**
-     */
-    function testIfNoneMatchWrongEtag() {
-
+    public function testIfNoneMatchWrongEtag()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"1234"']);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
-    /**
-     */
-    function testIfNoneMatchWrongEtagMultiple() {
-
+    public function testIfNoneMatchWrongEtagMultiple()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"1234", "5678"']);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\PreconditionFailed
+     * @expectedException \Sabre\DAV\Exception\PreconditionFailed
      */
-    function testIfNoneMatchCorrectEtag() {
-
+    public function testIfNoneMatchCorrectEtag()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"abc123"']);
         $httpResponse = new HTTP\Response();
         $server->checkPreconditions($httpRequest, $httpResponse);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\PreconditionFailed
+     * @expectedException \Sabre\DAV\Exception\PreconditionFailed
      */
-    function testIfNoneMatchCorrectEtagMultiple() {
-
+    public function testIfNoneMatchCorrectEtagMultiple()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"1234, "abc123"']);
         $httpResponse = new HTTP\Response();
         $server->checkPreconditions($httpRequest, $httpResponse);
-
     }
 
-    /**
-     */
-    function testIfNoneMatchCorrectEtagAsGet() {
-
+    public function testIfNoneMatchCorrectEtagAsGet()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-None-Match' => '"abc123"']);
@@ -172,14 +148,13 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse($server->checkPreconditions($httpRequest, $server->httpResponse));
         $this->assertEquals(304, $server->httpResponse->getStatus());
         $this->assertEquals(['ETag' => ['"abc123"']], $server->httpResponse->getHeaders());
-
     }
 
     /**
      * This was a test written for issue #515.
      */
-    function testNoneMatchCorrectEtagEnsureSapiSent() {
-
+    public function testNoneMatchCorrectEtagEnsureSapiSent()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $server->sapi = new HTTP\SapiMock();
@@ -193,22 +168,18 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse($server->checkPreconditions($httpRequest, $server->httpResponse));
         $this->assertEquals(304, $server->httpResponse->getStatus());
         $this->assertEquals([
-            'ETag'            => ['"abc123"'],
+            'ETag' => ['"abc123"'],
             'X-Sabre-Version' => [Version::VERSION],
         ], $server->httpResponse->getHeaders());
         $this->assertEquals(1, HTTP\SapiMock::$sent);
-
     }
 
-    /**
-     */
-    function testIfModifiedSinceUnModified() {
-
+    public function testIfModifiedSinceUnModified()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_IF_MODIFIED_SINCE' => 'Sun, 06 Nov 1994 08:49:37 GMT',
-            'REQUEST_URI'            => '/foo'
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'If-Modified-Since' => 'Sun, 06 Nov 1994 08:49:37 GMT',
         ]);
         $server->httpResponse = new HTTP\ResponseMock();
         $this->assertFalse($server->checkPreconditions($httpRequest, $server->httpResponse));
@@ -217,128 +188,96 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals([
             'Last-Modified' => ['Sat, 06 Apr 1985 23:30:00 GMT'],
         ], $server->httpResponse->getHeaders());
-
     }
 
-
-    /**
-     */
-    function testIfModifiedSinceModified() {
-
+    public function testIfModifiedSinceModified()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_IF_MODIFIED_SINCE' => 'Tue, 06 Nov 1984 08:49:37 GMT',
-            'REQUEST_URI'            => '/foo'
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'If-Modified-Since' => 'Tue, 06 Nov 1984 08:49:37 GMT',
         ]);
 
         $httpResponse = new HTTP\ResponseMock();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
-    /**
-     */
-    function testIfModifiedSinceInvalidDate() {
-
+    public function testIfModifiedSinceInvalidDate()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_IF_MODIFIED_SINCE' => 'Your mother',
-            'REQUEST_URI'            => '/foo'
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'If-Modified-Since' => 'Your mother',
         ]);
         $httpResponse = new HTTP\ResponseMock();
 
         // Invalid dates must be ignored, so this should return true
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
-    /**
-     */
-    function testIfModifiedSinceInvalidDate2() {
-
+    public function testIfModifiedSinceInvalidDate2()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_IF_MODIFIED_SINCE' => 'Sun, 06 Nov 1994 08:49:37 EST',
-            'REQUEST_URI'            => '/foo'
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'If-Unmodified-Since' => 'Sun, 06 Nov 1994 08:49:37 EST',
         ]);
         $httpResponse = new HTTP\ResponseMock();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
-
-    /**
-     */
-    function testIfUnmodifiedSinceUnModified() {
-
+    public function testIfUnmodifiedSinceUnModified()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_IF_UNMODIFIED_SINCE' => 'Sun, 06 Nov 1994 08:49:37 GMT',
-            'REQUEST_URI'              => '/foo'
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'If-Unmodified-Since' => 'Sun, 06 Nov 1994 08:49:37 GMT',
         ]);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
 
-
     /**
-     * @expectedException Sabre\DAV\Exception\PreconditionFailed
+     * @expectedException \Sabre\DAV\Exception\PreconditionFailed
      */
-    function testIfUnmodifiedSinceModified() {
-
+    public function testIfUnmodifiedSinceModified()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_IF_UNMODIFIED_SINCE' => 'Tue, 06 Nov 1984 08:49:37 GMT',
-            'REQUEST_URI'              => '/foo'
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'If-Unmodified-Since' => 'Tue, 06 Nov 1984 08:49:37 GMT',
         ]);
         $httpResponse = new HTTP\ResponseMock();
         $server->checkPreconditions($httpRequest, $httpResponse);
-
     }
 
-    /**
-     */
-    function testIfUnmodifiedSinceInvalidDate() {
-
+    public function testIfUnmodifiedSinceInvalidDate()
+    {
         $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray([
-            'HTTP_IF_UNMODIFIED_SINCE' => 'Sun, 06 Nov 1984 08:49:37 CET',
-            'REQUEST_URI'              => '/foo'
+        $httpRequest = new HTTP\Request('GET', '/foo', [
+            'If-Unmodified-Since' => 'Sun, 06 Nov 1984 08:49:37 CET',
         ]);
         $httpResponse = new HTTP\ResponseMock();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
-
     }
-
-
 }
 
-class ServerPreconditionsNode extends File {
-
-    function getETag() {
-
+class ServerPreconditionsNode extends File
+{
+    public function getETag()
+    {
         return '"abc123"';
-
     }
 
-    function getLastModified() {
-
+    public function getLastModified()
+    {
         /* my birthday & time, I believe */
         return strtotime('1985-04-07 01:30 +02:00');
-
     }
 
-    function getName() {
-
+    public function getName()
+    {
         return 'foo';
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerPropsTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerPropsTest.php
index 253200be7..462fba664 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerPropsTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerPropsTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
@@ -7,95 +9,93 @@ use Sabre\HTTP;
 require_once 'Sabre/HTTP/ResponseMock.php';
 require_once 'Sabre/DAV/AbstractServer.php';
 
-class ServerPropsTest extends AbstractServer {
-
-    protected function getRootNode() {
-
+class ServerPropsTest extends AbstractServer
+{
+    protected function getRootNode()
+    {
         return new FSExt\Directory(SABRE_TEMPDIR);
-
     }
 
-    function setUp() {
-
-        if (file_exists(SABRE_TEMPDIR . '../.sabredav')) unlink(SABRE_TEMPDIR . '../.sabredav');
+    public function setUp()
+    {
+        if (file_exists(SABRE_TEMPDIR.'../.sabredav')) {
+            unlink(SABRE_TEMPDIR.'../.sabredav');
+        }
         parent::setUp();
-        file_put_contents(SABRE_TEMPDIR . '/test2.txt', 'Test contents2');
-        mkdir(SABRE_TEMPDIR . '/col');
-        file_put_contents(SABRE_TEMPDIR . 'col/test.txt', 'Test contents');
-        $this->server->addPlugin(new Locks\Plugin(new Locks\Backend\File(SABRE_TEMPDIR . '/.locksdb')));
-
+        file_put_contents(SABRE_TEMPDIR.'/test2.txt', 'Test contents2');
+        mkdir(SABRE_TEMPDIR.'/col');
+        file_put_contents(SABRE_TEMPDIR.'col/test.txt', 'Test contents');
+        $this->server->addPlugin(new Locks\Plugin(new Locks\Backend\File(SABRE_TEMPDIR.'/.locksdb')));
     }
 
-    function tearDown() {
-
+    public function tearDown()
+    {
         parent::tearDown();
-        if (file_exists(SABRE_TEMPDIR . '../.locksdb')) unlink(SABRE_TEMPDIR . '../.locksdb');
-
+        if (file_exists(SABRE_TEMPDIR.'../.locksdb')) {
+            unlink(SABRE_TEMPDIR.'../.locksdb');
+        }
     }
 
-    private function sendRequest($body, $path = '/', $headers = ['Depth' => '0']) {
-
+    private function sendRequest($body, $path = '/', $headers = ['Depth' => '0'])
+    {
         $request = new HTTP\Request('PROPFIND', $path, $headers, $body);
 
         $this->server->httpRequest = $request;
         $this->server->exec();
-
     }
 
-    function testPropFindEmptyBody() {
-
-        $this->sendRequest("");
+    public function testPropFindEmptyBody()
+    {
+        $this->sendRequest('');
         $this->assertEquals(207, $this->response->status);
 
         $this->assertEquals([
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Type'    => ['application/xml; charset=utf-8'],
-                'DAV'             => ['1, 3, extended-mkcol, 2'],
-                'Vary'            => ['Brief,Prefer'],
+                'Content-Type' => ['application/xml; charset=utf-8'],
+                'DAV' => ['1, 3, extended-mkcol, 2'],
+                'Vary' => ['Brief,Prefer'],
             ],
             $this->response->getHeaders()
          );
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", 'xmlns\\1="urn:DAV"', $this->response->body);
         $xml = simplexml_load_string($body);
         $xml->registerXPathNamespace('d', 'urn:DAV');
 
         list($data) = $xml->xpath('/d:multistatus/d:response/d:href');
-        $this->assertEquals('/', (string)$data, 'href element should have been /');
+        $this->assertEquals('/', (string) $data, 'href element should have been /');
 
         $data = $xml->xpath('/d:multistatus/d:response/d:propstat/d:prop/d:resourcetype');
         $this->assertEquals(1, count($data));
-
     }
 
-    function testPropFindEmptyBodyFile() {
-
-        $this->sendRequest("", '/test2.txt', []);
+    public function testPropFindEmptyBodyFile()
+    {
+        $this->sendRequest('', '/test2.txt', []);
         $this->assertEquals(207, $this->response->status);
 
         $this->assertEquals([
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Type'    => ['application/xml; charset=utf-8'],
-                'DAV'             => ['1, 3, extended-mkcol, 2'],
-                'Vary'            => ['Brief,Prefer'],
+                'Content-Type' => ['application/xml; charset=utf-8'],
+                'DAV' => ['1, 3, extended-mkcol, 2'],
+                'Vary' => ['Brief,Prefer'],
             ],
             $this->response->getHeaders()
          );
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", 'xmlns\\1="urn:DAV"', $this->response->body);
         $xml = simplexml_load_string($body);
         $xml->registerXPathNamespace('d', 'urn:DAV');
 
         list($data) = $xml->xpath('/d:multistatus/d:response/d:href');
-        $this->assertEquals('/test2.txt', (string)$data, 'href element should have been /test2.txt');
+        $this->assertEquals('/test2.txt', (string) $data, 'href element should have been /test2.txt');
 
         $data = $xml->xpath('/d:multistatus/d:response/d:propstat/d:prop/d:getcontentlength');
         $this->assertEquals(1, count($data));
-
     }
 
-    function testSupportedLocks() {
-
+    public function testSupportedLocks()
+    {
         $xml = '<?xml version="1.0"?>
 <d:propfind xmlns:d="DAV:">
   <d:prop>
@@ -105,7 +105,7 @@ class ServerPropsTest extends AbstractServer {
 
         $this->sendRequest($xml);
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", 'xmlns\\1="urn:DAV"', $this->response->body);
         $xml = simplexml_load_string($body);
         $xml->registerXPathNamespace('d', 'urn:DAV');
 
@@ -128,8 +128,8 @@ class ServerPropsTest extends AbstractServer {
         $this->assertEquals(2, count($data), 'We expected two \'d:write\' tags');
     }
 
-    function testLockDiscovery() {
-
+    public function testLockDiscovery()
+    {
         $xml = '<?xml version="1.0"?>
 <d:propfind xmlns:d="DAV:">
   <d:prop>
@@ -139,17 +139,16 @@ class ServerPropsTest extends AbstractServer {
 
         $this->sendRequest($xml);
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", 'xmlns\\1="urn:DAV"', $this->response->body);
         $xml = simplexml_load_string($body);
         $xml->registerXPathNamespace('d', 'urn:DAV');
 
         $data = $xml->xpath('/d:multistatus/d:response/d:propstat/d:prop/d:lockdiscovery');
         $this->assertEquals(1, count($data), 'We expected a \'d:lockdiscovery\' tag');
-
     }
 
-    function testUnknownProperty() {
-
+    public function testUnknownProperty()
+    {
         $xml = '<?xml version="1.0"?>
 <d:propfind xmlns:d="DAV:">
   <d:prop>
@@ -158,7 +157,7 @@ class ServerPropsTest extends AbstractServer {
 </d:propfind>';
 
         $this->sendRequest($xml);
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", 'xmlns\\1="urn:DAV"', $this->response->body);
         $xml = simplexml_load_string($body);
         $xml->registerXPathNamespace('d', 'urn:DAV');
         $pathTests = [
@@ -170,17 +169,16 @@ class ServerPropsTest extends AbstractServer {
             '/d:multistatus/d:response/d:propstat/d:prop/d:macaroni',
         ];
         foreach ($pathTests as $test) {
-            $this->assertTrue(count($xml->xpath($test)) == true, 'We expected the ' . $test . ' element to appear in the response, we got: ' . $body);
+            $this->assertTrue(true == count($xml->xpath($test)), 'We expected the '.$test.' element to appear in the response, we got: '.$body);
         }
 
         $val = $xml->xpath('/d:multistatus/d:response/d:propstat/d:status');
         $this->assertEquals(1, count($val), $body);
-        $this->assertEquals('HTTP/1.1 404 Not Found', (string)$val[0]);
-
+        $this->assertEquals('HTTP/1.1 404 Not Found', (string) $val[0]);
     }
 
-    function testParsePropPatchRequest() {
-
+    public function testParsePropPatchRequest()
+    {
         $body = '<?xml version="1.0"?>
 <d:propertyupdate xmlns:d="DAV:" xmlns:s="http://sabredav.org/NS/test">
   <d:set><d:prop><s:someprop>somevalue</s:someprop></d:prop></d:set>
@@ -191,11 +189,9 @@ class ServerPropsTest extends AbstractServer {
 
         $result = $this->server->xml->parse($body);
         $this->assertEquals([
-            '{http://sabredav.org/NS/test}someprop'  => 'somevalue',
+            '{http://sabredav.org/NS/test}someprop' => 'somevalue',
             '{http://sabredav.org/NS/test}someprop2' => null,
             '{http://sabredav.org/NS/test}someprop3' => null,
         ], $result->properties);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerRangeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerRangeTest.php
index 81224d687..93ea083d8 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerRangeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerRangeTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use DateTime;
@@ -12,22 +14,22 @@ use Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ServerRangeTest extends \Sabre\DAVServerTest {
-
+class ServerRangeTest extends \Sabre\DAVServerTest
+{
     protected $setupFiles = true;
 
     /**
-     * We need this string a lot
+     * We need this string a lot.
      */
     protected $lastModified;
 
-    function setUp() {
-
+    public function setUp()
+    {
         parent::setUp();
         $this->server->createFile('files/test.txt', 'Test contents');
 
-        $this->lastModified = HTTP\Util::toHTTPDate(
-            new DateTime('@' . $this->server->tree->getNodeForPath('files/test.txt')->getLastModified())
+        $this->lastModified = HTTP\toDate(
+            new DateTime('@'.$this->server->tree->getNodeForPath('files/test.txt')->getLastModified())
         );
 
         $stream = popen('echo "Test contents"', 'r');
@@ -37,112 +39,106 @@ class ServerRangeTest extends \Sabre\DAVServerTest {
             );
         $streamingFile->setSize(12);
         $this->server->tree->getNodeForPath('files')->addNode($streamingFile);
-
     }
 
-    function testRange() {
-
+    public function testRange()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', ['Range' => 'bytes=2-5']);
         $response = $this->request($request);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [4],
-            'Content-Range'   => ['bytes 2-5/13'],
-            'ETag'            => ['"' . md5('Test contents') . '"'],
-            'Last-Modified'   => [$this->lastModified],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [4],
+            'Content-Range' => ['bytes 2-5/13'],
+            'ETag' => ['"'.md5('Test contents').'"'],
+            'Last-Modified' => [$this->lastModified],
             ],
             $response->getHeaders()
         );
         $this->assertEquals(206, $response->getStatus());
         $this->assertEquals('st c', $response->getBodyAsString());
-
     }
 
     /**
      * @depends testRange
      */
-    function testStartRange() {
-
+    public function testStartRange()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', ['Range' => 'bytes=2-']);
         $response = $this->request($request);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [11],
-            'Content-Range'   => ['bytes 2-12/13'],
-            'ETag'            => ['"' . md5('Test contents') . '"'],
-            'Last-Modified'   => [$this->lastModified],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [11],
+            'Content-Range' => ['bytes 2-12/13'],
+            'ETag' => ['"'.md5('Test contents').'"'],
+            'Last-Modified' => [$this->lastModified],
             ],
             $response->getHeaders()
         );
 
         $this->assertEquals(206, $response->getStatus());
         $this->assertEquals('st contents', $response->getBodyAsString());
-
     }
 
     /**
      * @depends testRange
      */
-    function testEndRange() {
-
+    public function testEndRange()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', ['Range' => 'bytes=-8']);
         $response = $this->request($request);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [8],
-            'Content-Range'   => ['bytes 5-12/13'],
-            'ETag'            => ['"' . md5('Test contents') . '"'],
-            'Last-Modified'   => [$this->lastModified],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [8],
+            'Content-Range' => ['bytes 5-12/13'],
+            'ETag' => ['"'.md5('Test contents').'"'],
+            'Last-Modified' => [$this->lastModified],
             ],
             $response->getHeaders()
         );
 
         $this->assertEquals(206, $response->getStatus());
         $this->assertEquals('contents', $response->getBodyAsString());
-
     }
 
     /**
      * @depends testRange
      */
-    function testTooHighRange() {
-
+    public function testTooHighRange()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', ['Range' => 'bytes=100-200']);
         $response = $this->request($request);
 
         $this->assertEquals(416, $response->getStatus());
-
     }
 
     /**
      * @depends testRange
      */
-    function testCrazyRange() {
-
+    public function testCrazyRange()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', ['Range' => 'bytes=8-4']);
         $response = $this->request($request);
 
         $this->assertEquals(416, $response->getStatus());
-
     }
 
-    function testNonSeekableStream() {
-
+    public function testNonSeekableStream()
+    {
         $request = new HTTP\Request('GET', '/files/no-seeking.txt', ['Range' => 'bytes=2-5']);
         $response = $this->request($request);
 
         $this->assertEquals(206, $response->getStatus(), $response);
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [4],
-            'Content-Range'   => ['bytes 2-5/12'],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [4],
+            'Content-Range' => ['bytes 2-5/12'],
             // 'ETag'            => ['"' . md5('Test contents') . '"'],
             'Last-Modified' => [$this->lastModified],
             ],
@@ -150,113 +146,107 @@ class ServerRangeTest extends \Sabre\DAVServerTest {
         );
 
         $this->assertEquals('st c', $response->getBodyAsString());
-
     }
 
     /**
      * @depends testRange
      */
-    function testIfRangeEtag() {
-
+    public function testIfRangeEtag()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', [
-            'Range'    => 'bytes=2-5',
-            'If-Range' => '"' . md5('Test contents') . '"',
+            'Range' => 'bytes=2-5',
+            'If-Range' => '"'.md5('Test contents').'"',
         ]);
         $response = $this->request($request);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [4],
-            'Content-Range'   => ['bytes 2-5/13'],
-            'ETag'            => ['"' . md5('Test contents') . '"'],
-            'Last-Modified'   => [$this->lastModified],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [4],
+            'Content-Range' => ['bytes 2-5/13'],
+            'ETag' => ['"'.md5('Test contents').'"'],
+            'Last-Modified' => [$this->lastModified],
             ],
             $response->getHeaders()
         );
 
         $this->assertEquals(206, $response->getStatus());
         $this->assertEquals('st c', $response->getBodyAsString());
-
     }
 
     /**
      * @depends testIfRangeEtag
      */
-    function testIfRangeEtagIncorrect() {
-
+    public function testIfRangeEtagIncorrect()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', [
-            'Range'    => 'bytes=2-5',
+            'Range' => 'bytes=2-5',
             'If-Range' => '"foobar"',
         ]);
         $response = $this->request($request);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [13],
-            'ETag'            => ['"' . md5('Test contents') . '"'],
-            'Last-Modified'   => [$this->lastModified],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [13],
+            'ETag' => ['"'.md5('Test contents').'"'],
+            'Last-Modified' => [$this->lastModified],
             ],
             $response->getHeaders()
         );
 
         $this->assertEquals(200, $response->getStatus());
         $this->assertEquals('Test contents', $response->getBodyAsString());
-
     }
 
     /**
      * @depends testIfRangeEtag
      */
-    function testIfRangeModificationDate() {
-
+    public function testIfRangeModificationDate()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', [
-            'Range'    => 'bytes=2-5',
+            'Range' => 'bytes=2-5',
             'If-Range' => 'tomorrow',
         ]);
         $response = $this->request($request);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [4],
-            'Content-Range'   => ['bytes 2-5/13'],
-            'ETag'            => ['"' . md5('Test contents') . '"'],
-            'Last-Modified'   => [$this->lastModified],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [4],
+            'Content-Range' => ['bytes 2-5/13'],
+            'ETag' => ['"'.md5('Test contents').'"'],
+            'Last-Modified' => [$this->lastModified],
             ],
             $response->getHeaders()
         );
 
         $this->assertEquals(206, $response->getStatus());
         $this->assertEquals('st c', $response->getBodyAsString());
-
     }
 
     /**
      * @depends testIfRangeModificationDate
      */
-    function testIfRangeModificationDateModified() {
-
+    public function testIfRangeModificationDateModified()
+    {
         $request = new HTTP\Request('GET', '/files/test.txt', [
-            'Range'    => 'bytes=2-5',
+            'Range' => 'bytes=2-5',
             'If-Range' => '-2 years',
         ]);
         $response = $this->request($request);
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [13],
-            'ETag'            => ['"' . md5('Test contents') . '"'],
-            'Last-Modified'   => [$this->lastModified],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [13],
+            'ETag' => ['"'.md5('Test contents').'"'],
+            'Last-Modified' => [$this->lastModified],
             ],
             $response->getHeaders()
         );
 
         $this->assertEquals(200, $response->getStatus());
         $this->assertEquals('Test contents', $response->getBodyAsString());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php
index 043179a00..53153151b 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php
@@ -1,90 +1,74 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
-class ServerSimpleTest extends AbstractServer{
-
-    function testConstructArray() {
-
-        $nodes = [
-            new SimpleCollection('hello')
-        ];
-
-        $server = new Server($nodes);
-        $this->assertEquals($nodes[0], $server->tree->getNodeForPath('hello'));
-
-    }
-
-    /**
-     * @expectedException Sabre\DAV\Exception
-     */
-    function testConstructIncorrectObj() {
-
+class ServerSimpleTest extends AbstractServer
+{
+    public function testConstructArray()
+    {
         $nodes = [
             new SimpleCollection('hello'),
-            new \STDClass(),
         ];
 
         $server = new Server($nodes);
-
+        $this->assertEquals($nodes[0], $server->tree->getNodeForPath('hello'));
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testConstructInvalidArg() {
-
+    public function testConstructInvalidArg()
+    {
         $server = new Server(1);
-
     }
 
-    function testOptions() {
-
+    public function testOptions()
+    {
         $request = new HTTP\Request('OPTIONS', '/');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals([
-            'DAV'             => ['1, 3, extended-mkcol'],
-            'MS-Author-Via'   => ['DAV'],
-            'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
-            'Accept-Ranges'   => ['bytes'],
-            'Content-Length'  => ['0'],
+            'DAV' => ['1, 3, extended-mkcol'],
+            'MS-Author-Via' => ['DAV'],
+            'Allow' => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
+            'Accept-Ranges' => ['bytes'],
+            'Content-Length' => ['0'],
             'X-Sabre-Version' => [Version::VERSION],
         ], $this->response->getHeaders());
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals('', $this->response->body);
-
     }
 
-    function testOptionsUnmapped() {
-
+    public function testOptionsUnmapped()
+    {
         $request = new HTTP\Request('OPTIONS', '/unmapped');
         $this->server->httpRequest = $request;
 
         $this->server->exec();
 
         $this->assertEquals([
-            'DAV'             => ['1, 3, extended-mkcol'],
-            'MS-Author-Via'   => ['DAV'],
-            'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT, MKCOL'],
-            'Accept-Ranges'   => ['bytes'],
-            'Content-Length'  => ['0'],
+            'DAV' => ['1, 3, extended-mkcol'],
+            'MS-Author-Via' => ['DAV'],
+            'Allow' => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT, MKCOL'],
+            'Accept-Ranges' => ['bytes'],
+            'Content-Length' => ['0'],
             'X-Sabre-Version' => [Version::VERSION],
         ], $this->response->getHeaders());
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals('', $this->response->body);
-
     }
 
-    function testNonExistantMethod() {
-
+    public function testNonExistantMethod()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'BLABLA',
         ];
 
@@ -94,21 +78,19 @@ class ServerSimpleTest extends AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(501, $this->response->status);
-
-
     }
 
-    function testBaseUri() {
-
+    public function testBaseUri()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/blabla/test.txt',
+            'REQUEST_URI' => '/blabla/test.txt',
             'REQUEST_METHOD' => 'GET',
         ];
-        $filename = $this->tempDir . '/test.txt';
+        $filename = $this->tempDir.'/test.txt';
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->setBaseUri('/blabla/');
@@ -118,26 +100,25 @@ class ServerSimpleTest extends AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/octet-stream'],
-            'Content-Length'  => [13],
-            'Last-Modified'   => [HTTP\Util::toHTTPDate(new \DateTime('@' . filemtime($filename)))],
-            'ETag'            => ['"' . sha1(fileinode($filename) . filesize($filename) . filemtime($filename)) . '"'],
+            'Content-Type' => ['application/octet-stream'],
+            'Content-Length' => [13],
+            'Last-Modified' => [HTTP\toDate(new \DateTime('@'.filemtime($filename)))],
+            'ETag' => ['"'.sha1(fileinode($filename).filesize($filename).filemtime($filename)).'"'],
             ],
             $this->response->getHeaders()
          );
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals('Test contents', stream_get_contents($this->response->body));
-
     }
 
-    function testBaseUriAddSlash() {
-
+    public function testBaseUriAddSlash()
+    {
         $tests = [
-            '/'         => '/',
-            '/foo'      => '/foo/',
-            '/foo/'     => '/foo/',
-            '/foo/bar'  => '/foo/bar/',
+            '/' => '/',
+            '/foo' => '/foo/',
+            '/foo/' => '/foo/',
+            '/foo/bar' => '/foo/bar/',
             '/foo/bar/' => '/foo/bar/',
         ];
 
@@ -145,92 +126,86 @@ class ServerSimpleTest extends AbstractServer{
             $this->server->setBaseUri($test);
 
             $this->assertEquals($result, $this->server->getBaseUri());
-
         }
-
     }
 
-    function testCalculateUri() {
-
+    public function testCalculateUri()
+    {
         $uris = [
             'http://www.example.org/root/somepath',
             '/root/somepath',
             '/root/somepath/',
+            '//root/somepath/',
+            '///root///somepath///',
         ];
 
         $this->server->setBaseUri('/root/');
 
         foreach ($uris as $uri) {
-
             $this->assertEquals('somepath', $this->server->calculateUri($uri));
-
         }
 
         $this->server->setBaseUri('/root');
 
         foreach ($uris as $uri) {
-
             $this->assertEquals('somepath', $this->server->calculateUri($uri));
-
         }
 
         $this->assertEquals('', $this->server->calculateUri('/root'));
 
-    }
+        $this->server->setBaseUri('/');
+
+        foreach ($uris as $uri) {
+            $this->assertEquals('root/somepath', $this->server->calculateUri($uri));
+        }
 
-    function testCalculateUriSpecialChars() {
+        $this->assertEquals('', $this->server->calculateUri(''));
+    }
 
+    public function testCalculateUriSpecialChars()
+    {
         $uris = [
             'http://www.example.org/root/%C3%A0fo%C3%B3',
             '/root/%C3%A0fo%C3%B3',
-            '/root/%C3%A0fo%C3%B3/'
+            '/root/%C3%A0fo%C3%B3/',
         ];
 
         $this->server->setBaseUri('/root/');
 
         foreach ($uris as $uri) {
-
             $this->assertEquals("\xc3\xa0fo\xc3\xb3", $this->server->calculateUri($uri));
-
         }
 
         $this->server->setBaseUri('/root');
 
         foreach ($uris as $uri) {
-
             $this->assertEquals("\xc3\xa0fo\xc3\xb3", $this->server->calculateUri($uri));
-
         }
 
         $this->server->setBaseUri('/');
 
         foreach ($uris as $uri) {
-
             $this->assertEquals("root/\xc3\xa0fo\xc3\xb3", $this->server->calculateUri($uri));
-
         }
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testCalculateUriBreakout() {
-
+    public function testCalculateUriBreakout()
+    {
         $uri = '/path1/';
 
         $this->server->setBaseUri('/path2/');
         $this->server->calculateUri($uri);
-
     }
 
-    /**
-     */
-    function testGuessBaseUri() {
-
+    public function testGuessBaseUri()
+    {
         $serverVars = [
+            'REQUEST_METHOD' => 'GET',
             'REQUEST_URI' => '/index.php/root',
-            'PATH_INFO'   => '/root',
+            'PATH_INFO' => '/root',
         ];
 
         $httpRequest = HTTP\Sapi::createFromServerArray($serverVars);
@@ -238,17 +213,17 @@ class ServerSimpleTest extends AbstractServer{
         $server->httpRequest = $httpRequest;
 
         $this->assertEquals('/index.php/', $server->guessBaseUri());
-
     }
 
     /**
      * @depends testGuessBaseUri
      */
-    function testGuessBaseUriPercentEncoding() {
-
+    public function testGuessBaseUriPercentEncoding()
+    {
         $serverVars = [
+            'REQUEST_METHOD' => 'GET',
             'REQUEST_URI' => '/index.php/dir/path2/path%20with%20spaces',
-            'PATH_INFO'   => '/dir/path2/path with spaces',
+            'PATH_INFO' => '/dir/path2/path with spaces',
         ];
 
         $httpRequest = HTTP\Sapi::createFromServerArray($serverVars);
@@ -256,7 +231,6 @@ class ServerSimpleTest extends AbstractServer{
         $server->httpRequest = $httpRequest;
 
         $this->assertEquals('/index.php/', $server->guessBaseUri());
-
     }
 
     /**
@@ -279,11 +253,12 @@ class ServerSimpleTest extends AbstractServer{
 
     }*/
 
-    function testGuessBaseUri2() {
-
+    public function testGuessBaseUri2()
+    {
         $serverVars = [
+            'REQUEST_METHOD' => 'GET',
             'REQUEST_URI' => '/index.php/root/',
-            'PATH_INFO'   => '/root/',
+            'PATH_INFO' => '/root/',
         ];
 
         $httpRequest = HTTP\Sapi::createFromServerArray($serverVars);
@@ -291,12 +266,12 @@ class ServerSimpleTest extends AbstractServer{
         $server->httpRequest = $httpRequest;
 
         $this->assertEquals('/index.php/', $server->guessBaseUri());
-
     }
 
-    function testGuessBaseUriNoPathInfo() {
-
+    public function testGuessBaseUriNoPathInfo()
+    {
         $serverVars = [
+            'REQUEST_METHOD' => 'GET',
             'REQUEST_URI' => '/index.php/root',
         ];
 
@@ -305,32 +280,26 @@ class ServerSimpleTest extends AbstractServer{
         $server->httpRequest = $httpRequest;
 
         $this->assertEquals('/', $server->guessBaseUri());
-
     }
 
-    function testGuessBaseUriNoPathInfo2() {
-
-        $serverVars = [
-            'REQUEST_URI' => '/a/b/c/test.php',
-        ];
-
-        $httpRequest = HTTP\Sapi::createFromServerArray($serverVars);
+    public function testGuessBaseUriNoPathInfo2()
+    {
+        $httpRequest = new HTTP\Request('GET', '/a/b/c/test.php');
         $server = new Server();
         $server->httpRequest = $httpRequest;
 
         $this->assertEquals('/', $server->guessBaseUri());
-
     }
 
-
     /**
      * @depends testGuessBaseUri
      */
-    function testGuessBaseUriQueryString() {
-
+    public function testGuessBaseUriQueryString()
+    {
         $serverVars = [
+            'REQUEST_METHOD' => 'GET',
             'REQUEST_URI' => '/index.php/root?query_string=blabla',
-            'PATH_INFO'   => '/root',
+            'PATH_INFO' => '/root',
         ];
 
         $httpRequest = HTTP\Sapi::createFromServerArray($serverVars);
@@ -338,18 +307,18 @@ class ServerSimpleTest extends AbstractServer{
         $server->httpRequest = $httpRequest;
 
         $this->assertEquals('/index.php/', $server->guessBaseUri());
-
     }
 
     /**
      * @depends testGuessBaseUri
      * @expectedException \Sabre\DAV\Exception
      */
-    function testGuessBaseUriBadConfig() {
-
+    public function testGuessBaseUriBadConfig()
+    {
         $serverVars = [
+            'REQUEST_METHOD' => 'GET',
             'REQUEST_URI' => '/index.php/root/heyyy',
-            'PATH_INFO'   => '/root',
+            'PATH_INFO' => '/root',
         ];
 
         $httpRequest = HTTP\Sapi::createFromServerArray($serverVars);
@@ -357,19 +326,18 @@ class ServerSimpleTest extends AbstractServer{
         $server->httpRequest = $httpRequest;
 
         $server->guessBaseUri();
-
     }
 
-    function testTriggerException() {
-
+    public function testTriggerException()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'FOO',
         ];
 
         $httpRequest = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $httpRequest;
-        $this->server->on('beforeMethod', [$this, 'exceptionTrigger']);
+        $this->server->on('beforeMethod:*', [$this, 'exceptionTrigger']);
         $this->server->exec();
 
         $this->assertEquals([
@@ -377,19 +345,17 @@ class ServerSimpleTest extends AbstractServer{
         ], $this->response->getHeaders());
 
         $this->assertEquals(500, $this->response->status);
-
     }
 
-    function exceptionTrigger($request, $response) {
-
+    public function exceptionTrigger($request, $response)
+    {
         throw new Exception('Hola');
-
     }
 
-    function testReportNotFound() {
-
+    public function testReportNotFound()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'REPORT',
         ];
 
@@ -400,19 +366,18 @@ class ServerSimpleTest extends AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
             ],
             $this->response->getHeaders()
          );
 
-        $this->assertEquals(415, $this->response->status, 'We got an incorrect status back. Full response body follows: ' . $this->response->body);
-
+        $this->assertEquals(415, $this->response->status, 'We got an incorrect status back. Full response body follows: '.$this->response->body);
     }
 
-    function testReportIntercepted() {
-
+    public function testReportIntercepted()
+    {
         $serverVars = [
-            'REQUEST_URI'    => '/',
+            'REQUEST_URI' => '/',
             'REQUEST_METHOD' => 'REPORT',
         ];
 
@@ -424,52 +389,49 @@ class ServerSimpleTest extends AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'testheader'      => ['testvalue'],
+            'testheader' => ['testvalue'],
             ],
             $this->response->getHeaders()
         );
 
-        $this->assertEquals(418, $this->response->status, 'We got an incorrect status back. Full response body follows: ' . $this->response->body);
-
+        $this->assertEquals(418, $this->response->status, 'We got an incorrect status back. Full response body follows: '.$this->response->body);
     }
 
-    function reportHandler($reportName, $result, $path) {
-
-        if ($reportName == '{http://www.rooftopsolutions.nl/NS}myreport') {
+    public function reportHandler($reportName, $result, $path)
+    {
+        if ('{http://www.rooftopsolutions.nl/NS}myreport' == $reportName) {
             $this->server->httpResponse->setStatus(418);
             $this->server->httpResponse->setHeader('testheader', 'testvalue');
+
             return false;
+        } else {
+            return;
         }
-        else return;
-
     }
 
-    function testGetPropertiesForChildren() {
-
+    public function testGetPropertiesForChildren()
+    {
         $result = $this->server->getPropertiesForChildren('', [
             '{DAV:}getcontentlength',
         ]);
 
         $expected = [
             'test.txt' => ['{DAV:}getcontentlength' => 13],
-            'dir/'     => [],
+            'dir/' => [],
         ];
 
         $this->assertEquals($expected, $result);
-
     }
 
     /**
      * There are certain cases where no HTTP status may be set. We need to
      * intercept these and set it to a default error message.
      */
-    function testNoHTTPStatusSet() {
-
-        $this->server->on('method:GET', function() { return false; }, 1);
+    public function testNoHTTPStatusSet()
+    {
+        $this->server->on('method:GET', function () { return false; }, 1);
         $this->server->httpRequest = new HTTP\Request('GET', '/');
         $this->server->exec();
         $this->assertEquals(500, $this->response->getStatus());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php
index 383f8e657..cb8a4ab32 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php
@@ -1,102 +1,97 @@
 <?php
 
-namespace Sabre\DAV;
-
-class ServerUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
+declare(strict_types=1);
 
-    function testUpdatePropertiesFail() {
+namespace Sabre\DAV;
 
+class ServerUpdatePropertiesTest extends \PHPUnit\Framework\TestCase
+{
+    public function testUpdatePropertiesFail()
+    {
         $tree = [
             new SimpleCollection('foo'),
         ];
         $server = new Server($tree);
 
         $result = $server->updateProperties('foo', [
-            '{DAV:}foo' => 'bar'
+            '{DAV:}foo' => 'bar',
         ]);
 
         $expected = [
             '{DAV:}foo' => 403,
         ];
         $this->assertEquals($expected, $result);
-
     }
 
-    function testUpdatePropertiesProtected() {
-
+    public function testUpdatePropertiesProtected()
+    {
         $tree = [
             new SimpleCollection('foo'),
         ];
         $server = new Server($tree);
 
-        $server->on('propPatch', function($path, PropPatch $propPatch) {
-            $propPatch->handleRemaining(function() { return true; });
+        $server->on('propPatch', function ($path, PropPatch $propPatch) {
+            $propPatch->handleRemaining(function () { return true; });
         });
         $result = $server->updateProperties('foo', [
             '{DAV:}getetag' => 'bla',
-            '{DAV:}foo'     => 'bar'
+            '{DAV:}foo' => 'bar',
         ]);
 
         $expected = [
             '{DAV:}getetag' => 403,
-            '{DAV:}foo'     => 424,
+            '{DAV:}foo' => 424,
         ];
         $this->assertEquals($expected, $result);
-
     }
 
-    function testUpdatePropertiesEventFail() {
-
+    public function testUpdatePropertiesEventFail()
+    {
         $tree = [
             new SimpleCollection('foo'),
         ];
         $server = new Server($tree);
-        $server->on('propPatch', function($path, PropPatch $propPatch) {
+        $server->on('propPatch', function ($path, PropPatch $propPatch) {
             $propPatch->setResultCode('{DAV:}foo', 404);
-            $propPatch->handleRemaining(function() { return true; });
+            $propPatch->handleRemaining(function () { return true; });
         });
 
         $result = $server->updateProperties('foo', [
-            '{DAV:}foo'  => 'bar',
+            '{DAV:}foo' => 'bar',
             '{DAV:}foo2' => 'bla',
         ]);
 
         $expected = [
-            '{DAV:}foo'  => 404,
+            '{DAV:}foo' => 404,
             '{DAV:}foo2' => 424,
         ];
         $this->assertEquals($expected, $result);
-
     }
 
-    function testUpdatePropertiesEventSuccess() {
-
+    public function testUpdatePropertiesEventSuccess()
+    {
         $tree = [
             new SimpleCollection('foo'),
         ];
         $server = new Server($tree);
-        $server->on('propPatch', function($path, PropPatch $propPatch) {
-
-            $propPatch->handle(['{DAV:}foo', '{DAV:}foo2'], function() {
+        $server->on('propPatch', function ($path, PropPatch $propPatch) {
+            $propPatch->handle(['{DAV:}foo', '{DAV:}foo2'], function () {
                 return [
-                    '{DAV:}foo'  => 200,
+                    '{DAV:}foo' => 200,
                     '{DAV:}foo2' => 201,
                 ];
             });
-
         });
 
         $result = $server->updateProperties('foo', [
-            '{DAV:}foo'  => 'bar',
+            '{DAV:}foo' => 'bar',
             '{DAV:}foo2' => 'bla',
         ]);
 
         $expected = [
-            '{DAV:}foo'  => 200,
+            '{DAV:}foo' => 200,
             '{DAV:}foo2' => 201,
         ];
         $this->assertEquals($expected, $result);
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php b/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php
index 15ccfaf9e..6edca5ecc 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php
@@ -1,19 +1,19 @@
 <?php
 
-namespace Sabre\DAV;
-
-class SimpleFileTest extends \PHPUnit_Framework_TestCase {
+declare(strict_types=1);
 
-    function testAll() {
+namespace Sabre\DAV;
 
+class SimpleFileTest extends \PHPUnit\Framework\TestCase
+{
+    public function testAll()
+    {
         $file = new SimpleFile('filename.txt', 'contents', 'text/plain');
 
         $this->assertEquals('filename.txt', $file->getName());
         $this->assertEquals('contents', $file->get());
         $this->assertEquals(8, $file->getSize());
-        $this->assertEquals('"' . sha1('contents') . '"', $file->getETag());
+        $this->assertEquals('"'.sha1('contents').'"', $file->getETag());
         $this->assertEquals('text/plain', $file->getContentType());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php b/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php
index e98fe9048..1e4b92197 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php
@@ -1,27 +1,29 @@
 <?php
 
-namespace Sabre\DAV;
+declare(strict_types=1);
 
-class StringUtilTest extends \PHPUnit_Framework_TestCase {
+namespace Sabre\DAV;
 
+class StringUtilTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @param string $haystack
      * @param string $needle
      * @param string $collation
      * @param string $matchType
      * @param string $result
+     *
      * @throws Exception\BadRequest
      *
      * @dataProvider dataset
      */
-    function testTextMatch($haystack, $needle, $collation, $matchType, $result) {
-
+    public function testTextMatch($haystack, $needle, $collation, $matchType, $result)
+    {
         $this->assertEquals($result, StringUtil::textMatch($haystack, $needle, $collation, $matchType));
-
     }
 
-    function dataset() {
-
+    public function dataset()
+    {
         return [
             ['FOOBAR', 'FOO',    'i;octet', 'contains', true],
             ['FOOBAR', 'foo',    'i;octet', 'contains', false],
@@ -68,62 +70,54 @@ class StringUtilTest extends \PHPUnit_Framework_TestCase {
             ['FOOBAR', 'BAR',    'i;unicode-casemap', 'ends-with', true],
             ['FOOBAR', 'bar',    'i;unicode-casemap', 'ends-with', true],
         ];
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\BadRequest
+     * @expectedException \Sabre\DAV\Exception\BadRequest
      */
-    function testBadCollation() {
-
+    public function testBadCollation()
+    {
         StringUtil::textMatch('foobar', 'foo', 'blabla', 'contains');
-
     }
 
-
     /**
-     * @expectedException Sabre\DAV\Exception\BadRequest
+     * @expectedException \Sabre\DAV\Exception\BadRequest
      */
-    function testBadMatchType() {
-
+    public function testBadMatchType()
+    {
         StringUtil::textMatch('foobar', 'foo', 'i;octet', 'booh');
-
     }
 
-    function testEnsureUTF8_ascii() {
-
-        $inputString = "harkema";
-        $outputString = "harkema";
+    public function testEnsureUTF8_ascii()
+    {
+        $inputString = 'harkema';
+        $outputString = 'harkema';
 
         $this->assertEquals(
             $outputString,
             StringUtil::ensureUTF8($inputString)
         );
-
     }
 
-    function testEnsureUTF8_latin1() {
-
+    public function testEnsureUTF8_latin1()
+    {
         $inputString = "m\xfcnster";
-        $outputString = "münster";
+        $outputString = 'münster';
 
         $this->assertEquals(
             $outputString,
             StringUtil::ensureUTF8($inputString)
         );
-
     }
 
-    function testEnsureUTF8_utf8() {
-
+    public function testEnsureUTF8_utf8()
+    {
         $inputString = "m\xc3\xbcnster";
-        $outputString = "münster";
+        $outputString = 'münster';
 
         $this->assertEquals(
             $outputString,
             StringUtil::ensureUTF8($inputString)
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php b/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php
index 6acd6b077..352c8a3e7 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php
@@ -1,21 +1,22 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
 
-class TemporaryFileFilterTest extends AbstractServer {
-
-    function setUp() {
-
+class TemporaryFileFilterTest extends AbstractServer
+{
+    public function setUp()
+    {
         parent::setUp();
-        $plugin = new TemporaryFileFilterPlugin(SABRE_TEMPDIR . '/tff');
+        $plugin = new TemporaryFileFilterPlugin(SABRE_TEMPDIR.'/tff');
         $this->server->addPlugin($plugin);
-
     }
 
-    function testPutNormal() {
-
+    public function testPutNormal()
+    {
         $request = new HTTP\Request('PUT', '/testput.txt', [], 'Testing new file');
 
         $this->server->httpRequest = ($request);
@@ -25,12 +26,11 @@ class TemporaryFileFilterTest extends AbstractServer {
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('0', $this->response->getHeader('Content-Length'));
 
-        $this->assertEquals('Testing new file', file_get_contents(SABRE_TEMPDIR . '/testput.txt'));
-
+        $this->assertEquals('Testing new file', file_get_contents(SABRE_TEMPDIR.'/testput.txt'));
     }
 
-    function testPutTemp() {
-
+    public function testPutTemp()
+    {
         // mimicking an OS/X resource fork
         $request = new HTTP\Request('PUT', '/._testput.txt', [], 'Testing new file');
 
@@ -43,12 +43,11 @@ class TemporaryFileFilterTest extends AbstractServer {
             'X-Sabre-Temp' => ['true'],
         ], $this->response->getHeaders());
 
-        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testput.txt'), '._testput.txt should not exist in the regular file structure.');
-
+        $this->assertFalse(file_exists(SABRE_TEMPDIR.'/._testput.txt'), '._testput.txt should not exist in the regular file structure.');
     }
 
-    function testPutTempIfNoneMatch() {
-
+    public function testPutTempIfNoneMatch()
+    {
         // mimicking an OS/X resource fork
         $request = new HTTP\Request('PUT', '/._testput.txt', ['If-None-Match' => '*'], 'Testing new file');
 
@@ -61,8 +60,7 @@ class TemporaryFileFilterTest extends AbstractServer {
             'X-Sabre-Temp' => ['true'],
         ], $this->response->getHeaders());
 
-        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testput.txt'), '._testput.txt should not exist in the regular file structure.');
-
+        $this->assertFalse(file_exists(SABRE_TEMPDIR.'/._testput.txt'), '._testput.txt should not exist in the regular file structure.');
 
         $this->server->exec();
 
@@ -71,11 +69,10 @@ class TemporaryFileFilterTest extends AbstractServer {
             'X-Sabre-Temp' => ['true'],
             'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
-
     }
 
-    function testPutGet() {
-
+    public function testPutGet()
+    {
         // mimicking an OS/X resource fork
         $request = new HTTP\Request('PUT', '/._testput.txt', [], 'Testing new file');
         $this->server->httpRequest = ($request);
@@ -94,19 +91,29 @@ class TemporaryFileFilterTest extends AbstractServer {
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals([
-            'X-Sabre-Temp'   => ['true'],
+            'X-Sabre-Temp' => ['true'],
             'Content-Length' => [16],
-            'Content-Type'   => ['application/octet-stream'],
+            'Content-Type' => ['application/octet-stream'],
         ], $this->response->getHeaders());
 
         $this->assertEquals('Testing new file', stream_get_contents($this->response->body));
-
     }
 
-    function testLockNonExistant() {
+    public function testGetWithBrowserPlugin()
+    {
+        $this->server->addPlugin(new Browser\Plugin());
+        $request = new HTTP\Request('GET', '/');
+
+        $this->server->httpRequest = $request;
+        $this->server->exec();
+
+        $this->assertEquals(200, $this->response->status);
+    }
 
-        mkdir(SABRE_TEMPDIR . '/locksdir');
-        $locksBackend = new Locks\Backend\File(SABRE_TEMPDIR . '/locks');
+    public function testLockNonExistant()
+    {
+        mkdir(SABRE_TEMPDIR.'/locksdir');
+        $locksBackend = new Locks\Backend\File(SABRE_TEMPDIR.'/locks');
         $locksPlugin = new Locks\Plugin($locksBackend);
         $this->server->addPlugin($locksPlugin);
 
@@ -126,15 +133,14 @@ class TemporaryFileFilterTest extends AbstractServer {
 
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertTrue(1 === preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')), 'We did not get a valid Locktoken back ('.$this->response->getHeader('Lock-Token').')');
         $this->assertEquals('true', $this->response->getHeader('X-Sabre-Temp'));
 
-        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testlock.txt'), '._testlock.txt should not exist in the regular file structure.');
-
+        $this->assertFalse(file_exists(SABRE_TEMPDIR.'/._testlock.txt'), '._testlock.txt should not exist in the regular file structure.');
     }
 
-    function testPutDelete() {
-
+    public function testPutDelete()
+    {
         // mimicking an OS/X resource fork
         $request = new HTTP\Request('PUT', '/._testput.txt', [], 'Testing new file');
 
@@ -151,17 +157,16 @@ class TemporaryFileFilterTest extends AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(204, $this->response->status, "Incorrect status code received. Full body:\n" . $this->response->body);
+        $this->assertEquals(204, $this->response->status, "Incorrect status code received. Full body:\n".$this->response->body);
         $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
         ], $this->response->getHeaders());
 
         $this->assertEquals('', $this->response->body);
-
     }
 
-    function testPutPropfind() {
-
+    public function testPutPropfind()
+    {
         // mimicking an OS/X resource fork
         $request = new HTTP\Request('PUT', '/._testput.txt', [], 'Testing new file');
         $this->server->httpRequest = $request;
@@ -178,22 +183,20 @@ class TemporaryFileFilterTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Incorrect status code returned. Body: ' . $this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Incorrect status code returned. Body: '.$this->response->body);
         $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
             'Content-Type' => ['application/xml; charset=utf-8'],
         ], $this->response->getHeaders());
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", 'xmlns\\1="urn:DAV"', $this->response->body);
         $xml = simplexml_load_string($body);
         $xml->registerXPathNamespace('d', 'urn:DAV');
 
         list($data) = $xml->xpath('/d:multistatus/d:response/d:href');
-        $this->assertEquals('/._testput.txt', (string)$data, 'href element should have been /._testput.txt');
+        $this->assertEquals('/._testput.txt', (string) $data, 'href element should have been /._testput.txt');
 
         $data = $xml->xpath('/d:multistatus/d:response/d:propstat/d:prop/d:resourcetype');
         $this->assertEquals(1, count($data));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php b/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php
index 619ac03fd..3bfe3b3b0 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php
@@ -1,37 +1,35 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAV;
 
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
-class TestPlugin extends ServerPlugin {
-
+class TestPlugin extends ServerPlugin
+{
     public $beforeMethod;
 
-    function getFeatures() {
-
+    public function getFeatures()
+    {
         return ['drinking'];
-
     }
 
-    function getHTTPMethods($uri) {
-
-        return ['BEER','WINE'];
-
+    public function getHTTPMethods($uri)
+    {
+        return ['BEER', 'WINE'];
     }
 
-    function initialize(Server $server) {
-
-        $server->on('beforeMethod', [$this, 'beforeMethod']);
-
+    public function initialize(Server $server)
+    {
+        $server->on('beforeMethod:*', [$this, 'beforeMethod']);
     }
 
-    function beforeMethod(RequestInterface $request, ResponseInterface $response) {
-
+    public function beforeMethod(RequestInterface $request, ResponseInterface $response)
+    {
         $this->beforeMethod = $request->getMethod();
-        return true;
 
+        return true;
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php
index c70d17a22..51ff5ccde 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php
@@ -1,110 +1,104 @@
 <?php
 
-namespace Sabre\DAV;
-
-class TreeTest extends \PHPUnit_Framework_TestCase {
+declare(strict_types=1);
 
-    function testNodeExists() {
+namespace Sabre\DAV;
 
+class TreeTest extends \PHPUnit\Framework\TestCase
+{
+    public function testNodeExists()
+    {
         $tree = new TreeMock();
 
         $this->assertTrue($tree->nodeExists('hi'));
         $this->assertFalse($tree->nodeExists('hello'));
-
     }
 
-    function testCopy() {
-
+    public function testCopy()
+    {
         $tree = new TreeMock();
         $tree->copy('hi', 'hi2');
 
         $this->assertArrayHasKey('hi2', $tree->getNodeForPath('')->newDirectories);
         $this->assertEquals('foobar', $tree->getNodeForPath('hi/file')->get());
         $this->assertEquals(['test1' => 'value'], $tree->getNodeForPath('hi/file')->getProperties([]));
-
     }
 
-    function testCopyFile() {
-
+    public function testCopyFile()
+    {
         $tree = new TreeMock();
         $tree->copy('hi/file', 'hi/newfile');
 
         $this->assertArrayHasKey('newfile', $tree->getNodeForPath('hi')->newFiles);
     }
 
-    function testCopyFile0() {
-
+    public function testCopyFile0()
+    {
         $tree = new TreeMock();
         $tree->copy('hi/file', 'hi/0');
 
         $this->assertArrayHasKey('0', $tree->getNodeForPath('hi')->newFiles);
     }
 
-    function testMove() {
-
+    public function testMove()
+    {
         $tree = new TreeMock();
         $tree->move('hi', 'hi2');
 
         $this->assertEquals('hi2', $tree->getNodeForPath('hi')->getName());
         $this->assertTrue($tree->getNodeForPath('hi')->isRenamed);
-
     }
 
-    function testDeepMove() {
-
+    public function testDeepMove()
+    {
         $tree = new TreeMock();
         $tree->move('hi/sub', 'hi2');
 
         $this->assertArrayHasKey('hi2', $tree->getNodeForPath('')->newDirectories);
         $this->assertTrue($tree->getNodeForPath('hi/sub')->isDeleted);
-
     }
 
-    function testDelete() {
-
+    public function testDelete()
+    {
         $tree = new TreeMock();
         $tree->delete('hi');
         $this->assertTrue($tree->getNodeForPath('hi')->isDeleted);
-
     }
 
-    function testGetChildren() {
-
+    public function testGetChildren()
+    {
         $tree = new TreeMock();
         $children = $tree->getChildren('');
-        $this->assertEquals(2, count($children));
-        $this->assertEquals('hi', $children[0]->getName());
-
+        $firstChild = $children->current();
+        $this->assertEquals('hi', $firstChild->getName());
     }
 
-    function testGetMultipleNodes() {
-
+    public function testGetMultipleNodes()
+    {
         $tree = new TreeMock();
         $result = $tree->getMultipleNodes(['hi/sub', 'hi/file']);
         $this->assertArrayHasKey('hi/sub', $result);
         $this->assertArrayHasKey('hi/file', $result);
 
-        $this->assertEquals('sub',  $result['hi/sub']->getName());
+        $this->assertEquals('sub', $result['hi/sub']->getName());
         $this->assertEquals('file', $result['hi/file']->getName());
-
     }
-    function testGetMultipleNodes2() {
 
+    public function testGetMultipleNodes2()
+    {
         $tree = new TreeMock();
         $result = $tree->getMultipleNodes(['multi/1', 'multi/2']);
         $this->assertArrayHasKey('multi/1', $result);
         $this->assertArrayHasKey('multi/2', $result);
-
     }
-
 }
 
-class TreeMock extends Tree {
-
+class TreeMock extends Tree
+{
     private $nodes = [];
 
-    function __construct() {
-
+    public function __construct()
+    {
         $file = new TreeFileTester('file');
         $file->properties = ['test1' => 'value'];
         $file->data = 'foobar';
@@ -119,92 +113,86 @@ class TreeMock extends Tree {
                     new TreeFileTester('1'),
                     new TreeFileTester('2'),
                     new TreeFileTester('3'),
-                ])
+                ]),
             ])
         );
-
     }
-
 }
 
-class TreeDirectoryTester extends SimpleCollection {
-
+class TreeDirectoryTester extends SimpleCollection
+{
     public $newDirectories = [];
     public $newFiles = [];
     public $isDeleted = false;
     public $isRenamed = false;
 
-    function createDirectory($name) {
-
+    public function createDirectory($name)
+    {
         $this->newDirectories[$name] = true;
-
     }
 
-    function createFile($name, $data = null) {
-
+    public function createFile($name, $data = null)
+    {
         $this->newFiles[$name] = $data;
-
     }
 
-    function getChild($name) {
+    public function getChild($name)
+    {
+        if (isset($this->newDirectories[$name])) {
+            return new self($name);
+        }
+        if (isset($this->newFiles[$name])) {
+            return new TreeFileTester($name, $this->newFiles[$name]);
+        }
 
-        if (isset($this->newDirectories[$name])) return new self($name);
-        if (isset($this->newFiles[$name])) return new TreeFileTester($name, $this->newFiles[$name]);
         return parent::getChild($name);
-
     }
 
-    function childExists($name) {
-
-        return !!$this->getChild($name);
-
+    public function childExists($name)
+    {
+        return (bool) $this->getChild($name);
     }
 
-    function delete() {
-
+    public function delete()
+    {
         $this->isDeleted = true;
-
     }
 
-    function setName($name) {
-
+    public function setName($name)
+    {
         $this->isRenamed = true;
         $this->name = $name;
-
     }
-
 }
 
-class TreeFileTester extends File implements IProperties {
-
+class TreeFileTester extends File implements IProperties
+{
     public $name;
     public $data;
     public $properties;
 
-    function __construct($name, $data = null) {
-
+    public function __construct($name, $data = null)
+    {
         $this->name = $name;
-        if (is_null($data)) $data = 'bla';
+        if (is_null($data)) {
+            $data = 'bla';
+        }
         $this->data = $data;
-
     }
 
-    function getName() {
-
+    public function getName()
+    {
         return $this->name;
-
     }
 
-    function get() {
-
+    public function get()
+    {
         return $this->data;
-
     }
 
-    function getProperties($properties) {
-
+    public function getProperties($properties)
+    {
         return $this->properties;
-
     }
 
     /**
@@ -217,19 +205,16 @@ class TreeFileTester extends File implements IProperties {
      * Read the PropPatch documentation for more information.
      *
      * @param PropPatch $propPatch
-     * @return void
      */
-    function propPatch(PropPatch $propPatch) {
-
+    public function propPatch(PropPatch $propPatch)
+    {
         $this->properties = $propPatch->getMutations();
         $propPatch->setRemainingResultCode(200);
-
     }
-
 }
 
-class TreeMultiGetTester extends TreeDirectoryTester implements IMultiGet {
-
+class TreeMultiGetTester extends TreeDirectoryTester implements IMultiGet
+{
     /**
      * This method receives a list of paths in it's first argument.
      * It must return an array with Node objects.
@@ -237,10 +222,11 @@ class TreeMultiGetTester extends TreeDirectoryTester implements IMultiGet {
      * If any children are not found, you do not have to return them.
      *
      * @param array $paths
+     *
      * @return array
      */
-    function getMultipleChildren(array $paths) {
-
+    public function getMultipleChildren(array $paths)
+    {
         $result = [];
         foreach ($paths as $path) {
             try {
@@ -252,7 +238,5 @@ class TreeMultiGetTester extends TreeDirectoryTester implements IMultiGet {
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/UUIDUtilTest.php b/vendor/sabre/dav/tests/Sabre/DAV/UUIDUtilTest.php
index f005ecc75..d7ef9bec9 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/UUIDUtilTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/UUIDUtilTest.php
@@ -1,11 +1,13 @@
 <?php
 
-namespace Sabre\DAV;
-
-class UUIDUtilTest extends \PHPUnit_Framework_TestCase {
+declare(strict_types=1);
 
-    function testValidateUUID() {
+namespace Sabre\DAV;
 
+class UUIDUtilTest extends \PHPUnit\Framework\TestCase
+{
+    public function testValidateUUID()
+    {
         $this->assertTrue(
             UUIDUtil::validateUUID('11111111-2222-3333-4444-555555555555')
         );
@@ -18,8 +20,5 @@ class UUIDUtilTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse(
             UUIDUtil::validateUUID('fffffffg-2222-3333-4444-555555555555')
         );
-
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php
index 7d7a54d06..3627991bf 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php
@@ -1,38 +1,39 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 use Sabre\HTTP;
 
-class ACLMethodTest extends \PHPUnit_Framework_TestCase {
-
+class ACLMethodTest extends \PHPUnit\Framework\TestCase
+{
     /**
-     * @expectedException Sabre\DAV\Exception\BadRequest
+     * @expectedException \Sabre\DAV\Exception\BadRequest
      */
-    function testCallback() {
-
+    public function testCallback()
+    {
         $acl = new Plugin();
         $server = new DAV\Server();
         $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpAcl($server->httpRequest, $server->httpResponse);
-
     }
 
     /**
      /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\MethodNotAllowed
      */
-    function testNotSupportedByNode() {
-
+    public function testNotSupportedByNode()
+    {
         $tree = [
             new DAV\SimpleCollection('test'),
         ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request();
+        $server->httpRequest = new HTTP\Request('GET', '/');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
 </d:acl>';
@@ -41,17 +42,16 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
-    function testSuccessSimple() {
-
+    public function testSuccessSimple()
+    {
         $tree = [
             new MockACLNode('test', []),
         ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request();
+        $server->httpRequest = new HTTP\Request('GET', '/');
         $server->httpRequest->setUrl('/test');
 
         $body = '<?xml version="1.0"?>
@@ -62,14 +62,13 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $this->assertFalse($acl->httpACL($server->httpRequest, $server->httpResponse));
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NotRecognizedPrincipal
+     * @expectedException \Sabre\DAVACL\Exception\NotRecognizedPrincipal
      */
-    function testUnrecognizedPrincipal() {
-
+    public function testUnrecognizedPrincipal()
+    {
         $tree = [
             new MockACLNode('test', []),
         ];
@@ -88,14 +87,13 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NotRecognizedPrincipal
+     * @expectedException \Sabre\DAVACL\Exception\NotRecognizedPrincipal
      */
-    function testUnrecognizedPrincipal2() {
-
+    public function testUnrecognizedPrincipal2()
+    {
         $tree = [
             new MockACLNode('test', []),
             new DAV\SimpleCollection('principals', [
@@ -117,14 +115,13 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NotSupportedPrivilege
+     * @expectedException \Sabre\DAVACL\Exception\NotSupportedPrivilege
      */
-    function testUnknownPrivilege() {
-
+    public function testUnknownPrivilege()
+    {
         $tree = [
             new MockACLNode('test', []),
         ];
@@ -143,20 +140,19 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NoAbstract
+     * @expectedException \Sabre\DAVACL\Exception\NoAbstract
      */
-    function testAbstractPrivilege() {
-
+    public function testAbstractPrivilege()
+    {
         $tree = [
             new MockACLNode('test', []),
         ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->on('getSupportedPrivilegeSet', function($node, &$supportedPrivilegeSet) {
+        $server->on('getSupportedPrivilegeSet', function ($node, &$supportedPrivilegeSet) {
             $supportedPrivilegeSet['{DAV:}foo'] = ['abstract' => true];
         });
         $server->httpRequest = new HTTP\Request('ACL', '/test');
@@ -172,14 +168,13 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\AceConflict
+     * @expectedException \Sabre\DAVACL\Exception\AceConflict
      */
-    function testUpdateProtectedPrivilege() {
-
+    public function testUpdateProtectedPrivilege()
+    {
         $oldACL = [
             [
                 'principal' => 'principals/notfound',
@@ -206,14 +201,13 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\AceConflict
+     * @expectedException \Sabre\DAVACL\Exception\AceConflict
      */
-    function testUpdateProtectedPrivilege2() {
-
+    public function testUpdateProtectedPrivilege2()
+    {
         $oldACL = [
             [
                 'principal' => 'principals/notfound',
@@ -240,14 +234,13 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\AceConflict
+     * @expectedException \Sabre\DAVACL\Exception\AceConflict
      */
-    function testUpdateProtectedPrivilege3() {
-
+    public function testUpdateProtectedPrivilege3()
+    {
         $oldACL = [
             [
                 'principal' => 'principals/notfound',
@@ -274,11 +267,10 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
-
     }
 
-    function testSuccessComplex() {
-
+    public function testSuccessComplex()
+    {
         $oldACL = [
             [
                 'principal' => 'principals/foo',
@@ -317,7 +309,6 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
-
         $this->assertFalse($acl->httpAcl($server->httpRequest, $server->httpResponse));
 
         $this->assertEquals([
@@ -332,6 +323,5 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
                 'protected' => false,
             ],
         ], $node->getACL());
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php
index f16693625..724abc685 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php
@@ -1,18 +1,20 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 
-class AllowAccessTest extends \PHPUnit_Framework_TestCase {
-
+class AllowAccessTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var DAV\Server
      */
     protected $server;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $nodes = [
             new DAV\Mock\Collection('testdir', [
                 'file1.txt' => 'contents',
@@ -27,106 +29,92 @@ class AllowAccessTest extends \PHPUnit_Framework_TestCase {
         );
         // Login
         $this->server->getPlugin('auth')->beforeMethod(
-            new \Sabre\HTTP\Request(),
+            new \Sabre\HTTP\Request('GET', '/'),
             new \Sabre\HTTP\Response()
         );
         $aclPlugin = new Plugin();
         $this->server->addPlugin($aclPlugin);
-
     }
 
-    function testGet() {
-
+    public function testGet()
+    {
         $this->server->httpRequest->setMethod('GET');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testGetDoesntExist() {
-
+    public function testGetDoesntExist()
+    {
         $this->server->httpRequest->setMethod('GET');
         $this->server->httpRequest->setUrl('/foo');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testHEAD() {
-
+    public function testHEAD()
+    {
         $this->server->httpRequest->setMethod('HEAD');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:HEAD', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testOPTIONS() {
-
+    public function testOPTIONS()
+    {
         $this->server->httpRequest->setMethod('OPTIONS');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:OPTIONS', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testPUT() {
-
+    public function testPUT()
+    {
         $this->server->httpRequest->setMethod('PUT');
         $this->server->httpRequest->setUrl('/testdir/file1.txt');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:PUT', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testPROPPATCH() {
-
+    public function testPROPPATCH()
+    {
         $this->server->httpRequest->setMethod('PROPPATCH');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:PROPPATCH', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testCOPY() {
-
+    public function testCOPY()
+    {
         $this->server->httpRequest->setMethod('COPY');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:COPY', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testMOVE() {
-
+    public function testMOVE()
+    {
         $this->server->httpRequest->setMethod('MOVE');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:MOVE', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testLOCK() {
-
+    public function testLOCK()
+    {
         $this->server->httpRequest->setMethod('LOCK');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
+        $this->assertTrue($this->server->emit('beforeMethod:LOCK', [$this->server->httpRequest, $this->server->httpResponse]));
     }
 
-    function testBeforeBind() {
-
+    public function testBeforeBind()
+    {
         $this->assertTrue($this->server->emit('beforeBind', ['testdir/file']));
-
     }
 
-
-    function testBeforeUnbind() {
-
+    public function testBeforeUnbind()
+    {
         $this->assertTrue($this->server->emit('beforeUnbind', ['testdir']));
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php
index ceae9aed0..3c3aaf6c9 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php
@@ -1,19 +1,21 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 
-class BlockAccessTest extends \PHPUnit_Framework_TestCase {
-
+class BlockAccessTest extends \PHPUnit\Framework\TestCase
+{
     /**
      * @var DAV\Server
      */
     protected $server;
     protected $plugin;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $nodes = [
             new DAV\SimpleCollection('testdir'),
         ];
@@ -28,151 +30,138 @@ class BlockAccessTest extends \PHPUnit_Framework_TestCase {
         );
         // Login
         $this->server->getPlugin('auth')->beforeMethod(
-            new \Sabre\HTTP\Request(),
+            new \Sabre\HTTP\Request('GET', '/'),
             new \Sabre\HTTP\Response()
         );
         $this->server->addPlugin($this->plugin);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testGet() {
-
+    public function testGet()
+    {
         $this->server->httpRequest->setMethod('GET');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
-    function testGetDoesntExist() {
-
+    public function testGetDoesntExist()
+    {
         $this->server->httpRequest->setMethod('GET');
         $this->server->httpRequest->setUrl('/foo');
 
-        $r = $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
+        $r = $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
         $this->assertTrue($r);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testHEAD() {
-
+    public function testHEAD()
+    {
         $this->server->httpRequest->setMethod('HEAD');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testOPTIONS() {
-
+    public function testOPTIONS()
+    {
         $this->server->httpRequest->setMethod('OPTIONS');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testPUT() {
-
+    public function testPUT()
+    {
         $this->server->httpRequest->setMethod('PUT');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testPROPPATCH() {
-
+    public function testPROPPATCH()
+    {
         $this->server->httpRequest->setMethod('PROPPATCH');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testCOPY() {
-
+    public function testCOPY()
+    {
         $this->server->httpRequest->setMethod('COPY');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testMOVE() {
-
+    public function testMOVE()
+    {
         $this->server->httpRequest->setMethod('MOVE');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testACL() {
-
+    public function testACL()
+    {
         $this->server->httpRequest->setMethod('ACL');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testLOCK() {
-
+    public function testLOCK()
+    {
         $this->server->httpRequest->setMethod('LOCK');
         $this->server->httpRequest->setUrl('/testdir');
 
-        $this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]);
-
+        $this->server->emit('beforeMethod:GET', [$this->server->httpRequest, $this->server->httpResponse]);
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testBeforeBind() {
-
+    public function testBeforeBind()
+    {
         $this->server->emit('beforeBind', ['testdir/file']);
-
     }
 
     /**
-     * @expectedException Sabre\DAVACL\Exception\NeedPrivileges
+     * @expectedException \Sabre\DAVACL\Exception\NeedPrivileges
      */
-    function testBeforeUnbind() {
-
+    public function testBeforeUnbind()
+    {
         $this->server->emit('beforeUnbind', ['testdir']);
-
     }
 
-    function testPropFind() {
-
+    public function testPropFind()
+    {
         $propFind = new DAV\PropFind('testdir', [
             '{DAV:}displayname',
             '{DAV:}getcontentlength',
@@ -187,19 +176,18 @@ class BlockAccessTest extends \PHPUnit_Framework_TestCase {
             200 => [],
             404 => [],
             403 => [
-                '{DAV:}displayname'      => null,
+                '{DAV:}displayname' => null,
                 '{DAV:}getcontentlength' => null,
-                '{DAV:}bar'              => null,
-                '{DAV:}owner'            => null,
+                '{DAV:}bar' => null,
+                '{DAV:}owner' => null,
             ],
         ];
 
         $this->assertEquals($expected, $propFind->getResultForMultiStatus());
-
     }
 
-    function testBeforeGetPropertiesNoListing() {
-
+    public function testBeforeGetPropertiesNoListing()
+    {
         $this->plugin->hideNodesFromListings = true;
         $propFind = new DAV\PropFind('testdir', [
             '{DAV:}displayname',
@@ -210,6 +198,5 @@ class BlockAccessTest extends \PHPUnit_Framework_TestCase {
 
         $r = $this->server->emit('propFind', [$propFind, new DAV\SimpleCollection('testdir')]);
         $this->assertFalse($r);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php
index 1cdf2949f..60fb8f3e8 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
 
-class AceConflictTest extends \PHPUnit_Framework_TestCase {
-
-    function testSerialize() {
-
+class AceConflictTest extends \PHPUnit\Framework\TestCase
+{
+    public function testSerialize()
+    {
         $ex = new AceConflict('message');
 
         $server = new DAV\Server();
@@ -18,7 +20,7 @@ class AceConflictTest extends \PHPUnit_Framework_TestCase {
         $ex->serialize($server, $root);
 
         $xpaths = [
-            '/d:root'                   => 1,
+            '/d:root' => 1,
             '/d:root/d:no-ace-conflict' => 1,
         ];
 
@@ -29,11 +31,7 @@ class AceConflictTest extends \PHPUnit_Framework_TestCase {
         $dxpath = new \DOMXPath($dom2);
         $dxpath->registerNamespace('d', 'DAV:');
         foreach ($xpaths as $xpath => $count) {
-
-            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
-
+            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : '.$xpath.', we could only find '.$dxpath->query($xpath)->length.' elements, while we expected '.$count);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php
index b13e7722d..f08e536b5 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
 
-class NeedPrivilegesExceptionTest extends \PHPUnit_Framework_TestCase {
-
-    function testSerialize() {
-
+class NeedPrivilegesExceptionTest extends \PHPUnit\Framework\TestCase
+{
+    public function testSerialize()
+    {
         $uri = 'foo';
         $privileges = [
             '{DAV:}read',
@@ -23,12 +25,12 @@ class NeedPrivilegesExceptionTest extends \PHPUnit_Framework_TestCase {
         $ex->serialize($server, $root);
 
         $xpaths = [
-            '/d:root'                                                  => 1,
-            '/d:root/d:need-privileges'                                => 1,
-            '/d:root/d:need-privileges/d:resource'                     => 2,
-            '/d:root/d:need-privileges/d:resource/d:href'              => 2,
-            '/d:root/d:need-privileges/d:resource/d:privilege'         => 2,
-            '/d:root/d:need-privileges/d:resource/d:privilege/d:read'  => 1,
+            '/d:root' => 1,
+            '/d:root/d:need-privileges' => 1,
+            '/d:root/d:need-privileges/d:resource' => 2,
+            '/d:root/d:need-privileges/d:resource/d:href' => 2,
+            '/d:root/d:need-privileges/d:resource/d:privilege' => 2,
+            '/d:root/d:need-privileges/d:resource/d:privilege/d:read' => 1,
             '/d:root/d:need-privileges/d:resource/d:privilege/d:write' => 1,
         ];
 
@@ -39,11 +41,7 @@ class NeedPrivilegesExceptionTest extends \PHPUnit_Framework_TestCase {
         $dxpath = new \DOMXPath($dom2);
         $dxpath->registerNamespace('d', 'DAV:');
         foreach ($xpaths as $xpath => $count) {
-
-            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
-
+            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : '.$xpath.', we could only find '.$dxpath->query($xpath)->length.' elements, while we expected '.$count);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php
index f52b17371..38e9d8b93 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
 
-class NoAbstractTest extends \PHPUnit_Framework_TestCase {
-
-    function testSerialize() {
-
+class NoAbstractTest extends \PHPUnit\Framework\TestCase
+{
+    public function testSerialize()
+    {
         $ex = new NoAbstract('message');
 
         $server = new DAV\Server();
@@ -18,7 +20,7 @@ class NoAbstractTest extends \PHPUnit_Framework_TestCase {
         $ex->serialize($server, $root);
 
         $xpaths = [
-            '/d:root'               => 1,
+            '/d:root' => 1,
             '/d:root/d:no-abstract' => 1,
         ];
 
@@ -29,11 +31,7 @@ class NoAbstractTest extends \PHPUnit_Framework_TestCase {
         $dxpath = new \DOMXPath($dom2);
         $dxpath->registerNamespace('d', 'DAV:');
         foreach ($xpaths as $xpath => $count) {
-
-            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
-
+            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : '.$xpath.', we could only find '.$dxpath->query($xpath)->length.' elements, while we expected '.$count);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php
index df89aaf84..62915ea1d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
 
-class NotRecognizedPrincipalTest extends \PHPUnit_Framework_TestCase {
-
-    function testSerialize() {
-
+class NotRecognizedPrincipalTest extends \PHPUnit\Framework\TestCase
+{
+    public function testSerialize()
+    {
         $ex = new NotRecognizedPrincipal('message');
 
         $server = new DAV\Server();
@@ -18,7 +20,7 @@ class NotRecognizedPrincipalTest extends \PHPUnit_Framework_TestCase {
         $ex->serialize($server, $root);
 
         $xpaths = [
-            '/d:root'                        => 1,
+            '/d:root' => 1,
             '/d:root/d:recognized-principal' => 1,
         ];
 
@@ -29,11 +31,7 @@ class NotRecognizedPrincipalTest extends \PHPUnit_Framework_TestCase {
         $dxpath = new \DOMXPath($dom2);
         $dxpath->registerNamespace('d', 'DAV:');
         foreach ($xpaths as $xpath => $count) {
-
-            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
-
+            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : '.$xpath.', we could only find '.$dxpath->query($xpath)->length.' elements, while we expected '.$count);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php
index 50623952b..668c713d2 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
 
-class NotSupportedPrivilegeTest extends \PHPUnit_Framework_TestCase {
-
-    function testSerialize() {
-
+class NotSupportedPrivilegeTest extends \PHPUnit\Framework\TestCase
+{
+    public function testSerialize()
+    {
         $ex = new NotSupportedPrivilege('message');
 
         $server = new DAV\Server();
@@ -18,7 +20,7 @@ class NotSupportedPrivilegeTest extends \PHPUnit_Framework_TestCase {
         $ex->serialize($server, $root);
 
         $xpaths = [
-            '/d:root'                           => 1,
+            '/d:root' => 1,
             '/d:root/d:not-supported-privilege' => 1,
         ];
 
@@ -29,11 +31,7 @@ class NotSupportedPrivilegeTest extends \PHPUnit_Framework_TestCase {
         $dxpath = new \DOMXPath($dom2);
         $dxpath->registerNamespace('d', 'DAV:');
         foreach ($xpaths as $xpath => $count) {
-
-            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
-
+            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : '.$xpath.', we could only find '.$dxpath->query($xpath)->length.' elements, while we expected '.$count);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php
index 91de64372..28e328ea6 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
@@ -7,24 +9,24 @@ use Sabre\HTTP;
 
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
-
-    function getServer() {
-
+class ExpandPropertiesTest extends \PHPUnit\Framework\TestCase
+{
+    public function getServer()
+    {
         $tree = [
             new DAV\Mock\PropertiesCollection('node1', [], [
                 '{http://sabredav.org/ns}simple' => 'foo',
-                '{http://sabredav.org/ns}href'   => new DAV\Xml\Property\Href('node2'),
-                '{DAV:}displayname'              => 'Node 1',
+                '{http://sabredav.org/ns}href' => new DAV\Xml\Property\Href('node2'),
+                '{DAV:}displayname' => 'Node 1',
             ]),
             new DAV\Mock\PropertiesCollection('node2', [], [
-                '{http://sabredav.org/ns}simple'   => 'simple',
+                '{http://sabredav.org/ns}simple' => 'simple',
                 '{http://sabredav.org/ns}hreflist' => new DAV\Xml\Property\Href(['node1', 'node3']),
-                '{DAV:}displayname'                => 'Node 2',
+                '{DAV:}displayname' => 'Node 2',
             ]),
             new DAV\Mock\PropertiesCollection('node3', [], [
                 '{http://sabredav.org/ns}simple' => 'simple',
-                '{DAV:}displayname'              => 'Node 3',
+                '{DAV:}displayname' => 'Node 3',
             ]),
         ];
 
@@ -39,7 +41,7 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
             [
                 'principal' => '{DAV:}all',
                 'privilege' => '{DAV:}all',
-            ]
+            ],
         ]);
         $this->assertTrue($plugin instanceof Plugin);
 
@@ -47,11 +49,10 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals($plugin, $fakeServer->getPlugin('acl'));
 
         return $fakeServer;
-
     }
 
-    function testSimple() {
-
+    public function testSimple()
+    {
         $xml = '<?xml version="1.0"?>
 <d:expand-property xmlns:d="DAV:">
   <d:property name="displayname" />
@@ -62,8 +63,8 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/node1',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/node1',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -74,22 +75,21 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $server->exec();
 
-        $this->assertEquals(207, $server->httpResponse->status, 'Incorrect status code received. Full body: ' . $server->httpResponse->body);
+        $this->assertEquals(207, $server->httpResponse->status, 'Incorrect status code received. Full body: '.$server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response'                                 => 1,
-            '/d:multistatus/d:response/d:href'                          => 1,
-            '/d:multistatus/d:response/d:propstat'                      => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop'               => 2,
+            '/d:multistatus/d:response' => 1,
+            '/d:multistatus/d:response/d:href' => 1,
+            '/d:multistatus/d:response/d:propstat' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop' => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:simple'      => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href'        => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:simple' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href' => 1,
             '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:href' => 1,
         ];
 
@@ -97,25 +97,24 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $xml->registerXPathNamespace('d', 'DAV:');
         $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response: ' . $server->httpResponse->body);
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result).'. Full response: '.$server->httpResponse->body);
         }
-
     }
 
     /**
      * @depends testSimple
      */
-    function testExpand() {
-
+    public function testExpand()
+    {
         $xml = '<?xml version="1.0"?>
 <d:expand-property xmlns:d="DAV:">
   <d:property name="href" namespace="http://sabredav.org/ns">
@@ -125,8 +124,8 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/node1',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/node1',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -137,24 +136,23 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $server->exec();
 
-        $this->assertEquals(207, $server->httpResponse->status, 'Incorrect response status received. Full response body: ' . $server->httpResponse->body);
+        $this->assertEquals(207, $server->httpResponse->status, 'Incorrect response status received. Full response body: '.$server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response'                                                                     => 1,
-            '/d:multistatus/d:response/d:href'                                                              => 1,
-            '/d:multistatus/d:response/d:propstat'                                                          => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop'                                                   => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href'                                            => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response'                                 => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:href'                          => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat'                      => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop'               => 1,
+            '/d:multistatus/d:response' => 1,
+            '/d:multistatus/d:response/d:href' => 1,
+            '/d:multistatus/d:response/d:propstat' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:href' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop' => 1,
             '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop/d:displayname' => 1,
         ];
 
@@ -162,25 +160,24 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $xml->registerXPathNamespace('d', 'DAV:');
         $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . ' Full response body: ' . $server->httpResponse->getBodyAsString());
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result).' Full response body: '.$server->httpResponse->getBodyAsString());
         }
-
     }
 
     /**
      * @depends testSimple
      */
-    function testExpandHrefList() {
-
+    public function testExpandHrefList()
+    {
         $xml = '<?xml version="1.0"?>
 <d:expand-property xmlns:d="DAV:">
   <d:property name="hreflist" namespace="http://sabredav.org/ns">
@@ -190,8 +187,8 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/node2',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/node2',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -205,21 +202,20 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(207, $server->httpResponse->status);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response'                                                                         => 1,
-            '/d:multistatus/d:response/d:href'                                                                  => 1,
-            '/d:multistatus/d:response/d:propstat'                                                              => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop'                                                       => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist'                                            => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response'                                 => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href'                          => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat'                      => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop'               => 2,
+            '/d:multistatus/d:response' => 1,
+            '/d:multistatus/d:response/d:href' => 1,
+            '/d:multistatus/d:response/d:propstat' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop' => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/d:displayname' => 2,
         ];
 
@@ -227,25 +223,24 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $xml->registerXPathNamespace('d', 'DAV:');
         $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result));
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result));
         }
-
     }
 
     /**
      * @depends testExpand
      */
-    function testExpandDeep() {
-
+    public function testExpandDeep()
+    {
         $xml = '<?xml version="1.0"?>
 <d:expand-property xmlns:d="DAV:">
   <d:property name="hreflist" namespace="http://sabredav.org/ns">
@@ -258,8 +253,8 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/node2',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/node2',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -273,27 +268,26 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(207, $server->httpResponse->status);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response'                                                                                                             => 1,
-            '/d:multistatus/d:response/d:href'                                                                                                      => 1,
-            '/d:multistatus/d:response/d:propstat'                                                                                                  => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop'                                                                                           => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist'                                                                                => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response'                                                                     => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href'                                                              => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat'                                                          => 3,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop'                                                   => 3,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/d:displayname'                                     => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href'                                            => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response'                                 => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:href'                          => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat'                      => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop'               => 1,
+            '/d:multistatus/d:response' => 1,
+            '/d:multistatus/d:response/d:href' => 1,
+            '/d:multistatus/d:response/d:propstat' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat' => 3,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop' => 3,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/d:displayname' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href' => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:href' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop' => 1,
             '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop/d:displayname' => 1,
         ];
 
@@ -301,17 +295,16 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $xml->registerXPathNamespace('d', 'DAV:');
         $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result));
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result));
         }
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php b/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php
index 2d9744e29..51411f304 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php
@@ -1,55 +1,49 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 
-class MockACLNode extends DAV\Node implements IACL {
-
+class MockACLNode extends DAV\Node implements IACL
+{
     public $name;
     public $acl;
 
-    function __construct($name, array $acl = []) {
-
+    public function __construct($name, array $acl = [])
+    {
         $this->name = $name;
         $this->acl = $acl;
-
     }
 
-    function getName() {
-
+    public function getName()
+    {
         return $this->name;
-
     }
 
-    function getOwner() {
-
+    public function getOwner()
+    {
         return null;
-
     }
 
-    function getGroup() {
-
+    public function getGroup()
+    {
         return null;
-
     }
 
-    function getACL() {
-
+    public function getACL()
+    {
         return $this->acl;
-
     }
 
-    function setACL(array $acl) {
-
+    public function setACL(array $acl)
+    {
         $this->acl = $acl;
-
     }
 
-    function getSupportedPrivilegeSet() {
-
+    public function getSupportedPrivilegeSet()
+    {
         return null;
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php b/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php
index 934906802..f67025c5a 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php
@@ -1,64 +1,58 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 
-class MockPrincipal extends DAV\Node implements IPrincipal {
-
+class MockPrincipal extends DAV\Node implements IPrincipal
+{
     public $name;
     public $principalUrl;
     public $groupMembership = [];
     public $groupMemberSet = [];
 
-    function __construct($name, $principalUrl, array $groupMembership = [], array $groupMemberSet = []) {
-
+    public function __construct($name, $principalUrl, array $groupMembership = [], array $groupMemberSet = [])
+    {
         $this->name = $name;
         $this->principalUrl = $principalUrl;
         $this->groupMembership = $groupMembership;
         $this->groupMemberSet = $groupMemberSet;
-
     }
 
-    function getName() {
-
+    public function getName()
+    {
         return $this->name;
-
     }
 
-    function getDisplayName() {
-
+    public function getDisplayName()
+    {
         return $this->getName();
-
     }
 
-    function getAlternateUriSet() {
-
+    public function getAlternateUriSet()
+    {
         return [];
-
     }
 
-    function getPrincipalUrl() {
-
+    public function getPrincipalUrl()
+    {
         return $this->principalUrl;
-
     }
 
-    function getGroupMemberSet() {
-
+    public function getGroupMemberSet()
+    {
         return $this->groupMemberSet;
-
     }
 
-    function getGroupMemberShip() {
-
+    public function getGroupMemberShip()
+    {
         return $this->groupMembership;
-
     }
 
-    function setGroupMemberSet(array $groupMemberSet) {
-
+    public function setGroupMemberSet(array $groupMemberSet)
+    {
         $this->groupMemberSet = $groupMemberSet;
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php
index 8552448f5..9ab16df74 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
@@ -8,12 +10,12 @@ use Sabre\HTTP;
 require_once 'Sabre/DAVACL/MockACLNode.php';
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class PluginAdminTest extends \PHPUnit_Framework_TestCase {
-
+class PluginAdminTest extends \PHPUnit\Framework\TestCase
+{
     public $server;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $principalBackend = new PrincipalBackend\Mock();
 
         $tree = [
@@ -27,15 +29,15 @@ class PluginAdminTest extends \PHPUnit_Framework_TestCase {
         $this->server->addPlugin($plugin);
     }
 
-    function testNoAdminAccess() {
-
+    public function testNoAdminAccess()
+    {
         $plugin = new Plugin();
         $this->server->addPlugin($plugin);
 
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'OPTIONS',
-            'HTTP_DEPTH'     => 1,
-            'REQUEST_URI'    => '/adminonly',
+            'HTTP_DEPTH' => 1,
+            'REQUEST_URI' => '/adminonly',
         ]);
 
         $response = new HTTP\ResponseMock();
@@ -46,14 +48,13 @@ class PluginAdminTest extends \PHPUnit_Framework_TestCase {
         $this->server->exec();
 
         $this->assertEquals(403, $response->status);
-
     }
 
     /**
      * @depends testNoAdminAccess
      */
-    function testAdminAccess() {
-
+    public function testAdminAccess()
+    {
         $plugin = new Plugin();
         $plugin->adminPrincipals = [
             'principals/admin',
@@ -62,8 +63,8 @@ class PluginAdminTest extends \PHPUnit_Framework_TestCase {
 
         $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'OPTIONS',
-            'HTTP_DEPTH'     => 1,
-            'REQUEST_URI'    => '/adminonly',
+            'HTTP_DEPTH' => 1,
+            'REQUEST_URI' => '/adminonly',
         ]);
 
         $response = new HTTP\ResponseMock();
@@ -74,6 +75,5 @@ class PluginAdminTest extends \PHPUnit_Framework_TestCase {
         $this->server->exec();
 
         $this->assertEquals(200, $response->status);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php
index fb42efba7..16d3e781e 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php
@@ -1,14 +1,16 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 use Sabre\HTTP;
 
-class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
-
-    function testPrincipalCollectionSet() {
-
+class PluginPropertiesTest extends \PHPUnit\Framework\TestCase
+{
+    public function testPrincipalCollectionSet()
+    {
         $plugin = new Plugin();
         $plugin->allowUnauthenticatedAccess = false;
         $plugin->setDefaultACL([
@@ -42,14 +44,11 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
             'principals2/',
         ];
 
-
         $this->assertEquals($expected, $result[200]['{DAV:}principal-collection-set']->getHrefs());
-
-
     }
 
-    function testCurrentUserPrincipal() {
-
+    public function testCurrentUserPrincipal()
+    {
         $fakeServer = new DAV\Server();
         $plugin = new DAV\Auth\Plugin(new DAV\Auth\Backend\Mock());
         $fakeServer->addPlugin($plugin);
@@ -62,7 +61,6 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         ]);
         $fakeServer->addPlugin($plugin);
 
-
         $requestedProperties = [
             '{DAV:}current-user-principal',
         ];
@@ -76,7 +74,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(Xml\Property\Principal::UNAUTHENTICATED, $result[200]['{DAV:}current-user-principal']->getType());
 
         // This will force the login
-        $fakeServer->emit('beforeMethod', [$fakeServer->httpRequest, $fakeServer->httpResponse]);
+        $fakeServer->emit('beforeMethod:PROPFIND', [$fakeServer->httpRequest, $fakeServer->httpResponse]);
 
         $result = $fakeServer->getPropertiesForPath('', $requestedProperties);
         $result = $result[0];
@@ -86,11 +84,10 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertInstanceOf('Sabre\DAVACL\Xml\Property\Principal', $result[200]['{DAV:}current-user-principal']);
         $this->assertEquals(Xml\Property\Principal::HREF, $result[200]['{DAV:}current-user-principal']->getType());
         $this->assertEquals('principals/admin/', $result[200]['{DAV:}current-user-principal']->getHref());
-
     }
 
-    function testSupportedPrivilegeSet() {
-
+    public function testSupportedPrivilegeSet()
+    {
         $plugin = new Plugin();
         $plugin->allowUnauthenticatedAccess = false;
         $plugin->setDefaultACL([
@@ -119,28 +116,27 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->xml->write('{DAV:}root', $prop);
 
         $xpaths = [
-            '/d:root'                                                                                                                 => 1,
-            '/d:root/d:supported-privilege'                                                                                           => 1,
-            '/d:root/d:supported-privilege/d:privilege'                                                                               => 1,
-            '/d:root/d:supported-privilege/d:privilege/d:all'                                                                         => 1,
-            '/d:root/d:supported-privilege/d:abstract'                                                                                => 0,
-            '/d:root/d:supported-privilege/d:supported-privilege'                                                                     => 2,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege'                                                         => 2,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:read'                                                  => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:write'                                                 => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege'                                               => 7,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege'                                   => 7,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:read-acl'                        => 1,
+            '/d:root' => 1,
+            '/d:root/d:supported-privilege' => 1,
+            '/d:root/d:supported-privilege/d:privilege' => 1,
+            '/d:root/d:supported-privilege/d:privilege/d:all' => 1,
+            '/d:root/d:supported-privilege/d:abstract' => 0,
+            '/d:root/d:supported-privilege/d:supported-privilege' => 2,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege' => 2,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:read' => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:write' => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege' => 7,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege' => 7,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:read-acl' => 1,
             '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:read-current-user-privilege-set' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-content'                   => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-properties'                => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:bind'                            => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unbind'                          => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unlock'                          => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:abstract'                                    => 0,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-content' => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-properties' => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:bind' => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unbind' => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unlock' => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:abstract' => 0,
         ];
 
-
         // reloading because php dom sucks
         $dom2 = new \DOMDocument('1.0', 'utf-8');
         $dom2->loadXML($result);
@@ -148,15 +144,12 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $dxpath = new \DOMXPath($dom2);
         $dxpath->registerNamespace('d', 'DAV:');
         foreach ($xpaths as $xpath => $count) {
-
-            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count . ' Full XML: ' . $result);
-
+            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : '.$xpath.', we could only find '.$dxpath->query($xpath)->length.' elements, while we expected '.$count.' Full XML: '.$result);
         }
-
     }
 
-    function testACL() {
-
+    public function testACL()
+    {
         $plugin = new Plugin();
         $plugin->allowUnauthenticatedAccess = false;
         $plugin->setDefaultACL([
@@ -171,12 +164,11 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
                 [
                     'principal' => 'principals/admin',
                     'privilege' => '{DAV:}read',
-                ]
+                ],
             ]),
             new DAV\SimpleCollection('principals', [
                 $principal = new MockPrincipal('admin', 'principals/admin'),
             ]),
-
         ];
 
         $server = new DAV\Server($nodes);
@@ -185,7 +177,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($authPlugin);
 
         // Force login
-        $authPlugin->beforeMethod(new HTTP\Request(), new HTTP\Response());
+        $authPlugin->beforeMethod(new HTTP\Request('GET', '/'), new HTTP\Response());
 
         $requestedProperties = [
             '{DAV:}acl',
@@ -194,14 +186,13 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->getPropertiesForPath('foo', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1, count($result[200]), 'The {DAV:}acl property did not return from the list. Full list: ' . print_r($result, true));
+        $this->assertEquals(1, count($result[200]), 'The {DAV:}acl property did not return from the list. Full list: '.print_r($result, true));
         $this->assertArrayHasKey('{DAV:}acl', $result[200]);
         $this->assertInstanceOf('Sabre\\DAVACL\\Xml\Property\\Acl', $result[200]['{DAV:}acl']);
-
     }
 
-    function testACLRestrictions() {
-
+    public function testACLRestrictions()
+    {
         $plugin = new Plugin();
         $plugin->allowUnauthenticatedAccess = false;
 
@@ -210,12 +201,11 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
                 [
                     'principal' => 'principals/admin',
                     'privilege' => '{DAV:}read',
-                ]
+                ],
             ]),
             new DAV\SimpleCollection('principals', [
                 $principal = new MockPrincipal('admin', 'principals/admin'),
             ]),
-
         ];
 
         $server = new DAV\Server($nodes);
@@ -224,7 +214,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($authPlugin);
 
         // Force login
-        $authPlugin->beforeMethod(new HTTP\Request(), new HTTP\Response());
+        $authPlugin->beforeMethod(new HTTP\Request('GET', '/'), new HTTP\Response());
 
         $requestedProperties = [
             '{DAV:}acl-restrictions',
@@ -233,18 +223,17 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->getPropertiesForPath('foo', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1, count($result[200]), 'The {DAV:}acl-restrictions property did not return from the list. Full list: ' . print_r($result, true));
+        $this->assertEquals(1, count($result[200]), 'The {DAV:}acl-restrictions property did not return from the list. Full list: '.print_r($result, true));
         $this->assertArrayHasKey('{DAV:}acl-restrictions', $result[200]);
         $this->assertInstanceOf('Sabre\\DAVACL\\Xml\\Property\\AclRestrictions', $result[200]['{DAV:}acl-restrictions']);
-
     }
 
-    function testAlternateUriSet() {
-
+    public function testAlternateUriSet()
+    {
         $tree = [
             new DAV\SimpleCollection('principals', [
                 $principal = new MockPrincipal('user', 'principals/user'),
-            ])
+            ]),
         ];
 
         $fakeServer = new DAV\Server($tree);
@@ -271,11 +260,10 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $result[200]['{DAV:}alternate-URI-set']);
 
         $this->assertEquals([], $result[200]['{DAV:}alternate-URI-set']->getHrefs());
-
     }
 
-    function testPrincipalURL() {
-
+    public function testPrincipalURL()
+    {
         $tree = [
             new DAV\SimpleCollection('principals', [
                 $principal = new MockPrincipal('user', 'principals/user'),
@@ -307,11 +295,10 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $result[200]['{DAV:}principal-URL']);
 
         $this->assertEquals('principals/user/', $result[200]['{DAV:}principal-URL']->getHref());
-
     }
 
-    function testGroupMemberSet() {
-
+    public function testGroupMemberSet()
+    {
         $tree = [
             new DAV\SimpleCollection('principals', [
                 $principal = new MockPrincipal('user', 'principals/user'),
@@ -343,11 +330,10 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $result[200]['{DAV:}group-member-set']);
 
         $this->assertEquals([], $result[200]['{DAV:}group-member-set']->getHrefs());
-
     }
 
-    function testGroupMemberShip() {
-
+    public function testGroupMemberShip()
+    {
         $tree = [
             new DAV\SimpleCollection('principals', [
                 $principal = new MockPrincipal('user', 'principals/user'),
@@ -377,11 +363,10 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $result[200]['{DAV:}group-membership']);
 
         $this->assertEquals([], $result[200]['{DAV:}group-membership']->getHrefs());
-
     }
 
-    function testGetDisplayName() {
-
+    public function testGetDisplayName()
+    {
         $tree = [
             new DAV\SimpleCollection('principals', [
                 $principal = new MockPrincipal('user', 'principals/user'),
@@ -410,6 +395,5 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue(isset($result[200]['{DAV:}displayname']));
 
         $this->assertEquals('user', $result[200]['{DAV:}displayname']);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php
index 0147e6a61..169629a03 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 
-class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
-
-    function testUpdatePropertiesPassthrough() {
-
+class PluginUpdatePropertiesTest extends \PHPUnit\Framework\TestCase
+{
+    public function testUpdatePropertiesPassthrough()
+    {
         $tree = [
             new DAV\SimpleCollection('foo'),
         ];
@@ -24,11 +26,10 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals($expected, $result);
-
     }
 
-    function testRemoveGroupMembers() {
-
+    public function testRemoveGroupMembers()
+    {
         $tree = [
             new MockPrincipal('foo', 'foo'),
         ];
@@ -42,16 +43,15 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
         ]);
 
         $expected = [
-            '{DAV:}group-member-set' => 204
+            '{DAV:}group-member-set' => 204,
         ];
 
         $this->assertEquals($expected, $result);
         $this->assertEquals([], $tree[0]->getGroupMemberSet());
-
     }
 
-    function testSetGroupMembers() {
-
+    public function testSetGroupMembers()
+    {
         $tree = [
             new MockPrincipal('foo', 'foo'),
         ];
@@ -65,19 +65,18 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
         ]);
 
         $expected = [
-            '{DAV:}group-member-set' => 200
+            '{DAV:}group-member-set' => 200,
         ];
 
         $this->assertEquals($expected, $result);
         $this->assertEquals(['bar', 'baz'], $tree[0]->getGroupMemberSet());
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testSetBadValue() {
-
+    public function testSetBadValue()
+    {
         $tree = [
             new MockPrincipal('foo', 'foo'),
         ];
@@ -89,11 +88,10 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->updateProperties('foo', [
             '{DAV:}group-member-set' => new \StdClass(),
         ]);
-
     }
 
-    function testSetBadNode() {
-
+    public function testSetBadNode()
+    {
         $tree = [
             new DAV\SimpleCollection('foo'),
         ];
@@ -111,6 +109,5 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals($expected, $result);
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php
index 9fef3018d..89f69b10a 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php
@@ -1,16 +1,17 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL\PrincipalBackend;
 
 use Sabre\DAV;
-use Sabre\HTTP;
-
-abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
+abstract class AbstractPDOTest extends \PHPUnit\Framework\TestCase
+{
     use DAV\DbTestHelperTrait;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->dropTables(['principals', 'groupmembers']);
         $this->createSchema('principals');
 
@@ -19,92 +20,85 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $pdo->query("INSERT INTO principals (uri,email,displayname) VALUES ('principals/user','user@example.org','User')");
         $pdo->query("INSERT INTO principals (uri,email,displayname) VALUES ('principals/group','group@example.org','Group')");
 
-        $pdo->query("INSERT INTO groupmembers (principal_id,member_id) VALUES (5,4)");
-
+        $pdo->query('INSERT INTO groupmembers (principal_id,member_id) VALUES (5,4)');
     }
 
-
-    function testConstruct() {
-
+    public function testConstruct()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
         $this->assertTrue($backend instanceof PDO);
-
     }
 
     /**
      * @depends testConstruct
      */
-    function testGetPrincipalsByPrefix() {
-
+    public function testGetPrincipalsByPrefix()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
         $expected = [
             [
-                'uri'                                   => 'principals/admin',
+                'uri' => 'principals/admin',
                 '{http://sabredav.org/ns}email-address' => 'admin@example.org',
-                '{DAV:}displayname'                     => 'Administrator',
+                '{DAV:}displayname' => 'Administrator',
             ],
             [
-                'uri'                                   => 'principals/user',
+                'uri' => 'principals/user',
                 '{http://sabredav.org/ns}email-address' => 'user@example.org',
-                '{DAV:}displayname'                     => 'User',
+                '{DAV:}displayname' => 'User',
             ],
             [
-                'uri'                                   => 'principals/group',
+                'uri' => 'principals/group',
                 '{http://sabredav.org/ns}email-address' => 'group@example.org',
-                '{DAV:}displayname'                     => 'Group',
+                '{DAV:}displayname' => 'Group',
             ],
         ];
 
         $this->assertEquals($expected, $backend->getPrincipalsByPrefix('principals'));
         $this->assertEquals([], $backend->getPrincipalsByPrefix('foo'));
-
     }
 
     /**
      * @depends testConstruct
      */
-    function testGetPrincipalByPath() {
-
+    public function testGetPrincipalByPath()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
         $expected = [
-            'id'                                    => 4,
-            'uri'                                   => 'principals/user',
+            'id' => 4,
+            'uri' => 'principals/user',
             '{http://sabredav.org/ns}email-address' => 'user@example.org',
-            '{DAV:}displayname'                     => 'User',
+            '{DAV:}displayname' => 'User',
         ];
 
         $this->assertEquals($expected, $backend->getPrincipalByPath('principals/user'));
         $this->assertEquals(null, $backend->getPrincipalByPath('foo'));
-
     }
 
-    function testGetGroupMemberSet() {
-
+    public function testGetGroupMemberSet()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
         $expected = ['principals/user'];
 
         $this->assertEquals($expected, $backend->getGroupMemberSet('principals/group'));
-
     }
 
-    function testGetGroupMembership() {
-
+    public function testGetGroupMembership()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
         $expected = ['principals/group'];
 
         $this->assertEquals($expected, $backend->getGroupMembership('principals/user'));
-
     }
 
-    function testSetGroupMemberSet() {
-
+    public function testSetGroupMemberSet()
+    {
         $pdo = $this->getPDO();
 
         // Start situation
@@ -118,12 +112,10 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         // Adding principals again
         $backend->setGroupMemberSet('principals/group', ['principals/user']);
         $this->assertEquals(['principals/user'], $backend->getGroupMemberSet('principals/group'));
-
-
     }
 
-    function testSearchPrincipals() {
-
+    public function testSearchPrincipals()
+    {
         $pdo = $this->getPDO();
 
         $backend = new PDO($pdo);
@@ -139,11 +131,10 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $result = $backend->searchPrincipals('mom', ['{DAV:}displayname' => 'UsEr', '{http://sabredav.org/ns}email-address' => 'USER@EXAMPLE']);
         $this->assertEquals([], $result);
-
     }
 
-    function testUpdatePrincipal() {
-
+    public function testUpdatePrincipal()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
@@ -157,22 +148,21 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($result);
 
         $this->assertEquals([
-            'id'                                    => 4,
-            'uri'                                   => 'principals/user',
-            '{DAV:}displayname'                     => 'pietje',
+            'id' => 4,
+            'uri' => 'principals/user',
+            '{DAV:}displayname' => 'pietje',
             '{http://sabredav.org/ns}email-address' => 'user@example.org',
         ], $backend->getPrincipalByPath('principals/user'));
-
     }
 
-    function testUpdatePrincipalUnknownField() {
-
+    public function testUpdatePrincipalUnknownField()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
         $propPatch = new DAV\PropPatch([
             '{DAV:}displayname' => 'pietje',
-            '{DAV:}unknown'     => 'foo',
+            '{DAV:}unknown' => 'foo',
         ]);
 
         $backend->updatePrincipal('principals/user', $propPatch);
@@ -182,36 +172,31 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals([
             '{DAV:}displayname' => 424,
-            '{DAV:}unknown'     => 403
+            '{DAV:}unknown' => 403,
         ], $propPatch->getResult());
 
         $this->assertEquals([
-            'id'                                    => '4',
-            'uri'                                   => 'principals/user',
-            '{DAV:}displayname'                     => 'User',
+            'id' => '4',
+            'uri' => 'principals/user',
+            '{DAV:}displayname' => 'User',
             '{http://sabredav.org/ns}email-address' => 'user@example.org',
         ], $backend->getPrincipalByPath('principals/user'));
-
     }
 
-    function testFindByUriUnknownScheme() {
-
+    public function testFindByUriUnknownScheme()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
         $this->assertNull($backend->findByUri('http://foo', 'principals'));
-
     }
 
-
-    function testFindByUri() {
-
+    public function testFindByUri()
+    {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
         $this->assertEquals(
             'principals/user',
             $backend->findByUri('mailto:user@example.org', 'principals')
         );
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/Mock.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/Mock.php
index 1464f4c26..551a77900 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/Mock.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/Mock.php
@@ -1,121 +1,117 @@
 <?php
 
-namespace Sabre\DAVACL\PrincipalBackend;
+declare(strict_types=1);
 
-class Mock extends AbstractBackend {
+namespace Sabre\DAVACL\PrincipalBackend;
 
+class Mock extends AbstractBackend
+{
     public $groupMembers = [];
     public $principals;
 
-    function __construct(array $principals = null) {
-
+    public function __construct(array $principals = null)
+    {
         $this->principals = $principals;
 
         if (is_null($principals)) {
-
             $this->principals = [
                 [
-                    'uri'                                   => 'principals/user1',
-                    '{DAV:}displayname'                     => 'User 1',
+                    'uri' => 'principals/user1',
+                    '{DAV:}displayname' => 'User 1',
                     '{http://sabredav.org/ns}email-address' => 'user1.sabredav@sabredav.org',
-                    '{http://sabredav.org/ns}vcard-url'     => 'addressbooks/user1/book1/vcard1.vcf',
+                    '{http://sabredav.org/ns}vcard-url' => 'addressbooks/user1/book1/vcard1.vcf',
                 ],
                 [
-                    'uri'               => 'principals/admin',
+                    'uri' => 'principals/admin',
                     '{DAV:}displayname' => 'Admin',
                 ],
                 [
-                    'uri'                                   => 'principals/user2',
-                    '{DAV:}displayname'                     => 'User 2',
+                    'uri' => 'principals/user2',
+                    '{DAV:}displayname' => 'User 2',
                     '{http://sabredav.org/ns}email-address' => 'user2.sabredav@sabredav.org',
                 ],
             ];
-
         }
-
     }
 
-    function getPrincipalsByPrefix($prefix) {
-
+    public function getPrincipalsByPrefix($prefix)
+    {
         $prefix = trim($prefix, '/');
-        if ($prefix) $prefix .= '/';
+        if ($prefix) {
+            $prefix .= '/';
+        }
         $return = [];
 
         foreach ($this->principals as $principal) {
-
-            if ($prefix && strpos($principal['uri'], $prefix) !== 0) continue;
+            if ($prefix && 0 !== strpos($principal['uri'], $prefix)) {
+                continue;
+            }
 
             $return[] = $principal;
-
         }
 
         return $return;
-
     }
 
-    function addPrincipal(array $principal) {
-
+    public function addPrincipal(array $principal)
+    {
         $this->principals[] = $principal;
-
     }
 
-    function getPrincipalByPath($path) {
-
+    public function getPrincipalByPath($path)
+    {
         foreach ($this->getPrincipalsByPrefix('principals') as $principal) {
-            if ($principal['uri'] === $path) return $principal;
+            if ($principal['uri'] === $path) {
+                return $principal;
+            }
         }
-
     }
 
-    function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof') {
-
+    public function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof')
+    {
         $matches = [];
         foreach ($this->getPrincipalsByPrefix($prefixPath) as $principal) {
-
             foreach ($searchProperties as $key => $value) {
-
                 if (!isset($principal[$key])) {
                     continue 2;
                 }
-                if (mb_stripos($principal[$key], $value, 0, 'UTF-8') === false) {
+                if (false === mb_stripos($principal[$key], $value, 0, 'UTF-8')) {
                     continue 2;
                 }
 
                 // We have a match for this searchProperty!
-                if ($test === 'allof') {
+                if ('allof' === $test) {
                     continue;
                 } else {
                     break;
                 }
-
             }
             $matches[] = $principal['uri'];
-
         }
-        return $matches;
 
+        return $matches;
     }
 
-    function getGroupMemberSet($path) {
-
+    public function getGroupMemberSet($path)
+    {
         return isset($this->groupMembers[$path]) ? $this->groupMembers[$path] : [];
-
     }
 
-    function getGroupMembership($path) {
-
+    public function getGroupMembership($path)
+    {
         $membership = [];
         foreach ($this->groupMembers as $group => $members) {
-            if (in_array($path, $members)) $membership[] = $group;
+            if (in_array($path, $members)) {
+                $membership[] = $group;
+            }
         }
-        return $membership;
 
+        return $membership;
     }
 
-    function setGroupMemberSet($path, array $members) {
-
+    public function setGroupMemberSet($path, array $members)
+    {
         $this->groupMembers[$path] = $members;
-
     }
 
     /**
@@ -130,11 +126,11 @@ class Mock extends AbstractBackend {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param string $path
+     * @param string               $path
      * @param \Sabre\DAV\PropPatch $propPatch
      */
-    function updatePrincipal($path, \Sabre\DAV\PropPatch $propPatch) {
-
+    public function updatePrincipal($path, \Sabre\DAV\PropPatch $propPatch)
+    {
         $value = null;
         foreach ($this->principals as $principalIndex => $value) {
             if ($value['uri'] === $path) {
@@ -142,27 +138,22 @@ class Mock extends AbstractBackend {
                 break;
             }
         }
-        if (!$principal) return;
-
-        $propPatch->handleRemaining(function($mutations) use ($principal, $principalIndex) {
+        if (!$principal) {
+            return;
+        }
 
+        $propPatch->handleRemaining(function ($mutations) use ($principal, $principalIndex) {
             foreach ($mutations as $prop => $value) {
-
                 if (is_null($value) && isset($principal[$prop])) {
                     unset($principal[$prop]);
                 } else {
                     $principal[$prop] = $value;
                 }
-
             }
 
             $this->principals[$principalIndex] = $principal;
 
             return true;
-
         });
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php
index 8779eb69f..54795cf4d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\DAVACL\PrincipalBackend;
+declare(strict_types=1);
 
-class PDOMySQLTest extends AbstractPDOTest {
+namespace Sabre\DAVACL\PrincipalBackend;
 
+class PDOMySQLTest extends AbstractPDOTest
+{
     public $driver = 'mysql';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php
index 48454981d..549e0bd60 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php
@@ -1,9 +1,10 @@
 <?php
 
-namespace Sabre\DAVACL\PrincipalBackend;
+declare(strict_types=1);
 
-class PDOSqliteTest extends AbstractPDOTest {
+namespace Sabre\DAVACL\PrincipalBackend;
 
+class PDOSqliteTest extends AbstractPDOTest
+{
     public $driver = 'sqlite';
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php
index bcf78821b..68aebe2ae 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php
@@ -1,24 +1,25 @@
 <?php
 
-namespace Sabre\DAVACL;
-
-class PrincipalCollectionTest extends \PHPUnit_Framework_TestCase {
+declare(strict_types=1);
 
-    function testBasic() {
+namespace Sabre\DAVACL;
 
+class PrincipalCollectionTest extends \PHPUnit\Framework\TestCase
+{
+    public function testBasic()
+    {
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
         $this->assertTrue($pc instanceof PrincipalCollection);
 
         $this->assertEquals('principals', $pc->getName());
-
     }
 
     /**
      * @depends testBasic
      */
-    function testGetChildren() {
-
+    public function testGetChildren()
+    {
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
 
@@ -28,30 +29,27 @@ class PrincipalCollectionTest extends \PHPUnit_Framework_TestCase {
         foreach ($children as $child) {
             $this->assertTrue($child instanceof IPrincipal);
         }
-
     }
 
     /**
      * @depends testBasic
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\MethodNotAllowed
      */
-    function testGetChildrenDisable() {
-
+    public function testGetChildrenDisable()
+    {
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
         $pc->disableListing = true;
 
         $children = $pc->getChildren();
-
     }
 
-    function testFindByUri() {
-
+    public function testFindByUri()
+    {
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
         $this->assertEquals('principals/user1', $pc->findByUri('mailto:user1.sabredav@sabredav.org'));
         $this->assertNull($pc->findByUri('mailto:fake.user.sabredav@sabredav.org'));
         $this->assertNull($pc->findByUri(''));
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php
index 60e156d9a..3bdcfbbbd 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
@@ -7,10 +9,10 @@ use Sabre\HTTP;
 
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
-
-    function getServer() {
-
+class PrincipalPropertySearchTest extends \PHPUnit\Framework\TestCase
+{
+    public function getServer()
+    {
         $backend = new PrincipalBackend\Mock();
 
         $dir = new DAV\SimpleCollection('root');
@@ -30,11 +32,10 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals($plugin, $fakeServer->getPlugin('acl'));
 
         return $fakeServer;
-
     }
 
-    function testDepth1() {
-
+    public function testDepth1()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-property-search xmlns:d="DAV:">
   <d:property-search>
@@ -51,8 +52,8 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '1',
-            'REQUEST_URI'    => '/principals',
+            'HTTP_DEPTH' => '1',
+            'REQUEST_URI' => '/principals',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -66,14 +67,12 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(400, $server->httpResponse->getStatus(), $server->httpResponse->getBodyAsString());
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
-
     }
 
-
-    function testUnknownSearchField() {
-
+    public function testUnknownSearchField()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-property-search xmlns:d="DAV:">
   <d:property-search>
@@ -90,8 +89,8 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/principals',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/principals',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -102,17 +101,16 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
 
         $server->exec();
 
-        $this->assertEquals(207, $server->httpResponse->getStatus(), "Full body: " . $server->httpResponse->getBodyAsString());
+        $this->assertEquals(207, $server->httpResponse->getStatus(), 'Full body: '.$server->httpResponse->getBodyAsString());
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
-            'Vary'            => ['Brief,Prefer'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Vary' => ['Brief,Prefer'],
         ], $server->httpResponse->getHeaders());
-
     }
 
-    function testCorrect() {
-
+    public function testCorrect()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-property-search xmlns:d="DAV:">
   <d:apply-to-principal-collection-set />
@@ -130,8 +128,8 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -145,41 +143,39 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
-            'Vary'            => ['Brief,Prefer'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Vary' => ['Brief,Prefer'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response'                                      => 2,
-            '/d:multistatus/d:response/d:href'                               => 2,
-            '/d:multistatus/d:response/d:propstat'                           => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop'                    => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname'      => 2,
+            '/d:multistatus/d:response' => 2,
+            '/d:multistatus/d:response/d:href' => 2,
+            '/d:multistatus/d:response/d:propstat' => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop' => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/d:getcontentlength' => 2,
-            '/d:multistatus/d:response/d:propstat/d:status'                  => 4,
+            '/d:multistatus/d:response/d:propstat/d:status' => 4,
         ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
         $xml->registerXPathNamespace('d', 'DAV:');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result).'. Full response body: '.$server->httpResponse->body);
         }
-
     }
 
-    function testAND() {
-
+    public function testAND()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-property-search xmlns:d="DAV:">
   <d:apply-to-principal-collection-set />
@@ -203,8 +199,8 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -218,40 +214,39 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
-            'Vary'            => ['Brief,Prefer'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Vary' => ['Brief,Prefer'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response'                                      => 0,
-            '/d:multistatus/d:response/d:href'                               => 0,
-            '/d:multistatus/d:response/d:propstat'                           => 0,
-            '/d:multistatus/d:response/d:propstat/d:prop'                    => 0,
-            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname'      => 0,
+            '/d:multistatus/d:response' => 0,
+            '/d:multistatus/d:response/d:href' => 0,
+            '/d:multistatus/d:response/d:propstat' => 0,
+            '/d:multistatus/d:response/d:propstat/d:prop' => 0,
+            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 0,
             '/d:multistatus/d:response/d:propstat/d:prop/d:getcontentlength' => 0,
-            '/d:multistatus/d:response/d:propstat/d:status'                  => 0,
+            '/d:multistatus/d:response/d:propstat/d:status' => 0,
         ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
         $xml->registerXPathNamespace('d', 'DAV:');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result).'. Full response body: '.$server->httpResponse->body);
         }
-
     }
-    function testOR() {
 
+    public function testOR()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-property-search xmlns:d="DAV:" test="anyof">
   <d:apply-to-principal-collection-set />
@@ -275,8 +270,8 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -290,40 +285,39 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
-            'Vary'            => ['Brief,Prefer'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Vary' => ['Brief,Prefer'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response'                                      => 2,
-            '/d:multistatus/d:response/d:href'                               => 2,
-            '/d:multistatus/d:response/d:propstat'                           => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop'                    => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname'      => 2,
+            '/d:multistatus/d:response' => 2,
+            '/d:multistatus/d:response/d:href' => 2,
+            '/d:multistatus/d:response/d:propstat' => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop' => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/d:getcontentlength' => 2,
-            '/d:multistatus/d:response/d:propstat/d:status'                  => 4,
+            '/d:multistatus/d:response/d:propstat/d:status' => 4,
         ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
         $xml->registerXPathNamespace('d', 'DAV:');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result).'. Full response body: '.$server->httpResponse->body);
         }
-
     }
-    function testWrongUri() {
 
+    public function testWrongUri()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-property-search xmlns:d="DAV:">
   <d:property-search>
@@ -340,8 +334,8 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -355,11 +349,10 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
-            'Vary'            => ['Brief,Prefer'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Vary' => ['Brief,Prefer'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:multistatus',
             '/d:multistatus/d:response' => 0,
@@ -368,30 +361,27 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $xml = simplexml_load_string($server->httpResponse->body);
         $xml->registerXPathNamespace('d', 'DAV:');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result).'. Full response body: '.$server->httpResponse->body);
         }
-
     }
 }
 
-class MockPlugin extends Plugin {
-
-    function getCurrentUserPrivilegeSet($node) {
-
+class MockPlugin extends Plugin
+{
+    public function getCurrentUserPrivilegeSet($node)
+    {
         return [
             '{DAV:}read',
             '{DAV:}write',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php
index fa1314d10..04f168f92 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
@@ -7,10 +9,10 @@ use Sabre\HTTP;
 
 require_once 'Sabre/HTTP/ResponseMock.php';
 
-class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
-
-    function getServer() {
-
+class PrincipalSearchPropertySetTest extends \PHPUnit\Framework\TestCase
+{
+    public function getServer()
+    {
         $backend = new PrincipalBackend\Mock();
 
         $dir = new DAV\SimpleCollection('root');
@@ -27,18 +29,17 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals($plugin, $fakeServer->getPlugin('acl'));
 
         return $fakeServer;
-
     }
 
-    function testDepth1() {
-
+    public function testDepth1()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-search-property-set xmlns:d="DAV:" />';
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '1',
-            'REQUEST_URI'    => '/principals',
+            'HTTP_DEPTH' => '1',
+            'REQUEST_URI' => '/principals',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -52,20 +53,19 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(400, $server->httpResponse->status);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
-
     }
 
-    function testDepthIncorrectXML() {
-
+    public function testDepthIncorrectXML()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-search-property-set xmlns:d="DAV:"><d:ohell /></d:principal-search-property-set>';
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/principals',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/principals',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -79,20 +79,19 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(400, $server->httpResponse->status, $server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
-
     }
 
-    function testCorrect() {
-
+    public function testCorrect()
+    {
         $xml = '<?xml version="1.0"?>
 <d:principal-search-property-set xmlns:d="DAV:"/>';
 
         $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
-            'HTTP_DEPTH'     => '0',
-            'REQUEST_URI'    => '/principals',
+            'HTTP_DEPTH' => '0',
+            'REQUEST_URI' => '/principals',
         ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
@@ -106,35 +105,32 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(200, $server->httpResponse->status, $server->httpResponse->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Content-Type' => ['application/xml; charset=utf-8'],
         ], $server->httpResponse->getHeaders());
 
-
         $check = [
             '/d:principal-search-property-set',
-            '/d:principal-search-property-set/d:principal-search-property'                        => 2,
-            '/d:principal-search-property-set/d:principal-search-property/d:prop'                 => 2,
-            '/d:principal-search-property-set/d:principal-search-property/d:prop/d:displayname'   => 1,
+            '/d:principal-search-property-set/d:principal-search-property' => 2,
+            '/d:principal-search-property-set/d:principal-search-property/d:prop' => 2,
+            '/d:principal-search-property-set/d:principal-search-property/d:prop/d:displayname' => 1,
             '/d:principal-search-property-set/d:principal-search-property/d:prop/s:email-address' => 1,
-            '/d:principal-search-property-set/d:principal-search-property/d:description'          => 2,
+            '/d:principal-search-property-set/d:principal-search-property/d:description' => 2,
         ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
         $xml->registerXPathNamespace('d', 'DAV:');
         $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
         foreach ($check as $v1 => $v2) {
-
             $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
-            if (!is_int($v1)) $count = $v2;
-
-            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            if (!is_int($v1)) {
+                $count = $v2;
+            }
 
+            $this->assertEquals($count, count($result), 'we expected '.$count.' appearances of '.$xpath.' . We found '.count($result).'. Full response body: '.$server->httpResponse->body);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php
index 20622ad17..a4821da5a 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php
@@ -1,58 +1,55 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP;
-
-class PrincipalTest extends \PHPUnit_Framework_TestCase {
-
-    function testConstruct() {
 
+class PrincipalTest extends \PHPUnit\Framework\TestCase
+{
+    public function testConstruct()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertTrue($principal instanceof Principal);
-
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception
+     * @expectedException \Sabre\DAV\Exception
      */
-    function testConstructNoUri() {
-
+    public function testConstructNoUri()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, []);
-
     }
 
-    function testGetName() {
-
+    public function testGetName()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertEquals('admin', $principal->getName());
-
     }
 
-    function testGetDisplayName() {
-
+    public function testGetDisplayName()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertEquals('admin', $principal->getDisplayname());
 
         $principal = new Principal($principalBackend, [
-            'uri'               => 'principals/admin',
-            '{DAV:}displayname' => 'Mr. Admin'
+            'uri' => 'principals/admin',
+            '{DAV:}displayname' => 'Mr. Admin',
         ]);
         $this->assertEquals('Mr. Admin', $principal->getDisplayname());
-
     }
 
-    function testGetProperties() {
-
+    public function testGetProperties()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, [
-            'uri'                                   => 'principals/admin',
-            '{DAV:}displayname'                     => 'Mr. Admin',
+            'uri' => 'principals/admin',
+            '{DAV:}displayname' => 'Mr. Admin',
             '{http://www.example.org/custom}custom' => 'Custom',
             '{http://sabredav.org/ns}email-address' => 'admin@example.org',
         ]);
@@ -64,15 +61,17 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
         ];
         $props = $principal->getProperties($keys);
 
-        foreach ($keys as $key) $this->assertArrayHasKey($key, $props);
+        foreach ($keys as $key) {
+            $this->assertArrayHasKey($key, $props);
+        }
 
         $this->assertEquals('Mr. Admin', $props['{DAV:}displayname']);
 
         $this->assertEquals('admin@example.org', $props['{http://sabredav.org/ns}email-address']);
     }
 
-    function testUpdateProperties() {
-
+    public function testUpdateProperties()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
 
@@ -81,26 +80,24 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
         $result = $principal->propPatch($propPatch);
         $result = $propPatch->commit();
         $this->assertTrue($result);
-
     }
 
-    function testGetPrincipalUrl() {
-
+    public function testGetPrincipalUrl()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertEquals('principals/admin', $principal->getPrincipalUrl());
-
     }
 
-    function testGetAlternateUriSet() {
-
+    public function testGetAlternateUriSet()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, [
-            'uri'                                   => 'principals/admin',
-            '{DAV:}displayname'                     => 'Mr. Admin',
+            'uri' => 'principals/admin',
+            '{DAV:}displayname' => 'Mr. Admin',
             '{http://www.example.org/custom}custom' => 'Custom',
             '{http://sabredav.org/ns}email-address' => 'admin@example.org',
-            '{DAV:}alternate-URI-set'               => [
+            '{DAV:}alternate-URI-set' => [
                 'mailto:admin+1@example.org',
                 'mailto:admin+2@example.org',
                 'mailto:admin@example.org',
@@ -114,10 +111,10 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals($expected, $principal->getAlternateUriSet());
-
     }
-    function testGetAlternateUriSetEmpty() {
 
+    public function testGetAlternateUriSetEmpty()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, [
             'uri' => 'principals/admin',
@@ -126,26 +123,24 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
         $expected = [];
 
         $this->assertEquals($expected, $principal->getAlternateUriSet());
-
     }
 
-    function testGetGroupMemberSet() {
-
+    public function testGetGroupMemberSet()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertEquals([], $principal->getGroupMemberSet());
-
     }
-    function testGetGroupMembership() {
 
+    public function testGetGroupMembership()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertEquals([], $principal->getGroupMembership());
-
     }
 
-    function testSetGroupMemberSet() {
-
+    public function testSetGroupMemberSet()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $principal->setGroupMemberSet(['principals/foo']);
@@ -153,27 +148,24 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals([
             'principals/admin' => ['principals/foo'],
         ], $principalBackend->groupMembers);
-
     }
 
-    function testGetOwner() {
-
+    public function testGetOwner()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertEquals('principals/admin', $principal->getOwner());
-
     }
 
-    function testGetGroup() {
-
+    public function testGetGroup()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertNull($principal->getGroup());
-
     }
 
-    function testGetACl() {
-
+    public function testGetACl()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertEquals([
@@ -181,28 +173,24 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
                 'privilege' => '{DAV:}all',
                 'principal' => '{DAV:}owner',
                 'protected' => true,
-            ]
+            ],
         ], $principal->getACL());
-
     }
 
     /**
      * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    function testSetACl() {
-
+    public function testSetACl()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $principal->setACL([]);
-
     }
 
-    function testGetSupportedPrivilegeSet() {
-
+    public function testGetSupportedPrivilegeSet()
+    {
         $principalBackend = new PrincipalBackend\Mock();
         $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertNull($principal->getSupportedPrivilegeSet());
-
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php
index 2de0ba6a8..a1e9ee36c 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
@@ -8,10 +10,10 @@ use Sabre\HTTP;
 require_once 'Sabre/DAVACL/MockPrincipal.php';
 require_once 'Sabre/DAVACL/MockACLNode.php';
 
-class SimplePluginTest extends \PHPUnit_Framework_TestCase {
-
-    function testValues() {
-
+class SimplePluginTest extends \PHPUnit\Framework\TestCase
+{
+    public function testValues()
+    {
         $aclPlugin = new Plugin();
         $this->assertEquals('acl', $aclPlugin->getPluginName());
         $this->assertEquals(
@@ -24,25 +26,24 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
                 '{DAV:}expand-property',
                 '{DAV:}principal-match',
                 '{DAV:}principal-property-search',
-                '{DAV:}principal-search-property-set'
+                '{DAV:}principal-search-property-set',
             ],
             $aclPlugin->getSupportedReportSet(''));
 
         $this->assertEquals(['ACL'], $aclPlugin->getMethods(''));
 
-
         $this->assertEquals(
             'acl',
             $aclPlugin->getPluginInfo()['name']
         );
     }
 
-    function testGetFlatPrivilegeSet() {
-
+    public function testGetFlatPrivilegeSet()
+    {
         $expected = [
             '{DAV:}all' => [
-                'privilege'  => '{DAV:}all',
-                'abstract'   => false,
+                'privilege' => '{DAV:}all',
+                'abstract' => false,
                 'aggregates' => [
                     '{DAV:}read',
                     '{DAV:}write',
@@ -50,8 +51,8 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
                 'concrete' => '{DAV:}all',
             ],
             '{DAV:}read' => [
-                'privilege'  => '{DAV:}read',
-                'abstract'   => false,
+                'privilege' => '{DAV:}read',
+                'abstract' => false,
                 'aggregates' => [
                     '{DAV:}read-acl',
                     '{DAV:}read-current-user-privilege-set',
@@ -59,20 +60,20 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
                 'concrete' => '{DAV:}read',
             ],
             '{DAV:}read-acl' => [
-                'privilege'  => '{DAV:}read-acl',
-                'abstract'   => false,
+                'privilege' => '{DAV:}read-acl',
+                'abstract' => false,
                 'aggregates' => [],
-                'concrete'   => '{DAV:}read-acl',
+                'concrete' => '{DAV:}read-acl',
             ],
             '{DAV:}read-current-user-privilege-set' => [
-                'privilege'  => '{DAV:}read-current-user-privilege-set',
-                'abstract'   => false,
+                'privilege' => '{DAV:}read-current-user-privilege-set',
+                'abstract' => false,
                 'aggregates' => [],
-                'concrete'   => '{DAV:}read-current-user-privilege-set',
+                'concrete' => '{DAV:}read-current-user-privilege-set',
             ],
             '{DAV:}write' => [
-                'privilege'  => '{DAV:}write',
-                'abstract'   => false,
+                'privilege' => '{DAV:}write',
+                'abstract' => false,
                 'aggregates' => [
                     '{DAV:}write-properties',
                     '{DAV:}write-content',
@@ -83,36 +84,35 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
                 'concrete' => '{DAV:}write',
             ],
             '{DAV:}write-properties' => [
-                'privilege'  => '{DAV:}write-properties',
-                'abstract'   => false,
+                'privilege' => '{DAV:}write-properties',
+                'abstract' => false,
                 'aggregates' => [],
-                'concrete'   => '{DAV:}write-properties',
+                'concrete' => '{DAV:}write-properties',
             ],
             '{DAV:}write-content' => [
-                'privilege'  => '{DAV:}write-content',
-                'abstract'   => false,
+                'privilege' => '{DAV:}write-content',
+                'abstract' => false,
                 'aggregates' => [],
-                'concrete'   => '{DAV:}write-content',
+                'concrete' => '{DAV:}write-content',
             ],
             '{DAV:}unlock' => [
-                'privilege'  => '{DAV:}unlock',
-                'abstract'   => false,
+                'privilege' => '{DAV:}unlock',
+                'abstract' => false,
                 'aggregates' => [],
-                'concrete'   => '{DAV:}unlock',
+                'concrete' => '{DAV:}unlock',
             ],
             '{DAV:}bind' => [
-                'privilege'  => '{DAV:}bind',
-                'abstract'   => false,
+                'privilege' => '{DAV:}bind',
+                'abstract' => false,
                 'aggregates' => [],
-                'concrete'   => '{DAV:}bind',
+                'concrete' => '{DAV:}bind',
             ],
             '{DAV:}unbind' => [
-                'privilege'  => '{DAV:}unbind',
-                'abstract'   => false,
+                'privilege' => '{DAV:}unbind',
+                'abstract' => false,
                 'aggregates' => [],
-                'concrete'   => '{DAV:}unbind',
+                'concrete' => '{DAV:}unbind',
             ],
-
         ];
 
         $plugin = new Plugin();
@@ -120,28 +120,24 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         $server = new DAV\Server();
         $server->addPlugin($plugin);
         $this->assertEquals($expected, $plugin->getFlatPrivilegeSet(''));
-
     }
 
-    function testCurrentUserPrincipalsNotLoggedIn() {
-
+    public function testCurrentUserPrincipalsNotLoggedIn()
+    {
         $acl = new Plugin();
         $acl->allowUnauthenticatedAccess = false;
         $server = new DAV\Server();
         $server->addPlugin($acl);
 
         $this->assertEquals([], $acl->getCurrentUserPrincipals());
-
     }
 
-    function testCurrentUserPrincipalsSimple() {
-
+    public function testCurrentUserPrincipalsSimple()
+    {
         $tree = [
-
             new DAV\SimpleCollection('principals', [
                 new MockPrincipal('admin', 'principals/admin'),
-            ])
-
+            ]),
         ];
 
         $acl = new Plugin();
@@ -153,23 +149,20 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($auth);
 
         //forcing login
-        $auth->beforeMethod(new HTTP\Request(), new HTTP\Response());
+        $auth->beforeMethod(new HTTP\Request('GET', '/'), new HTTP\Response());
 
         $this->assertEquals(['principals/admin'], $acl->getCurrentUserPrincipals());
-
     }
 
-    function testCurrentUserPrincipalsGroups() {
-
+    public function testCurrentUserPrincipalsGroups()
+    {
         $tree = [
-
             new DAV\SimpleCollection('principals', [
                 new MockPrincipal('admin', 'principals/admin', ['principals/administrators', 'principals/everyone']),
                 new MockPrincipal('administrators', 'principals/administrators', ['principals/groups'], ['principals/admin']),
                 new MockPrincipal('everyone', 'principals/everyone', [], ['principals/admin']),
                 new MockPrincipal('groups', 'principals/groups', [], ['principals/administrators']),
-            ])
-
+            ]),
         ];
 
         $acl = new Plugin();
@@ -181,7 +174,7 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($auth);
 
         //forcing login
-        $auth->beforeMethod(new HTTP\Request(), new HTTP\Response());
+        $auth->beforeMethod(new HTTP\Request('GET', '/'), new HTTP\Response());
 
         $expected = [
             'principals/admin',
@@ -194,11 +187,10 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
 
         // The second one should trigger the cache and be identical
         $this->assertEquals($expected, $acl->getCurrentUserPrincipals());
-
     }
 
-    function testGetACL() {
-
+    public function testGetACL()
+    {
         $acl = [
             [
                 'principal' => 'principals/admin',
@@ -210,7 +202,6 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
             ],
         ];
 
-
         $tree = [
             new MockACLNode('foo', $acl),
         ];
@@ -221,11 +212,10 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($aclPlugin);
 
         $this->assertEquals($acl, $aclPlugin->getACL('foo'));
-
     }
 
-    function testGetCurrentUserPrivilegeSet() {
-
+    public function testGetCurrentUserPrivilegeSet()
+    {
         $acl = [
             [
                 'principal' => 'principals/admin',
@@ -241,14 +231,12 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
             ],
         ];
 
-
         $tree = [
             new MockACLNode('foo', $acl),
 
             new DAV\SimpleCollection('principals', [
                 new MockPrincipal('admin', 'principals/admin'),
             ]),
-
         ];
 
         $server = new DAV\Server($tree);
@@ -260,7 +248,7 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         $server->addPlugin($auth);
 
         //forcing login
-        $auth->beforeMethod(new HTTP\Request(), new HTTP\Response());
+        $auth->beforeMethod(new HTTP\Request('GET', '/'), new HTTP\Response());
 
         $expected = [
             '{DAV:}write',
@@ -274,11 +262,10 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals($expected, $aclPlugin->getCurrentUserPrivilegeSet('foo'));
-
     }
 
-    function testCheckPrivileges() {
-
+    public function testCheckPrivileges()
+    {
         $acl = [
             [
                 'principal' => 'principals/admin',
@@ -294,14 +281,12 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
             ],
         ];
 
-
         $tree = [
             new MockACLNode('foo', $acl),
 
             new DAV\SimpleCollection('principals', [
                 new MockPrincipal('admin', 'principals/admin'),
             ]),
-
         ];
 
         $server = new DAV\Server($tree);
@@ -316,6 +301,5 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         //$auth->beforeMethod('GET','/');
 
         $this->assertFalse($aclPlugin->checkPrivileges('foo', ['{DAV:}read'], Plugin::R_PARENT, false));
-
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVServerTest.php b/vendor/sabre/dav/tests/Sabre/DAVServerTest.php
index 35f240d23..982090d23 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVServerTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVServerTest.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre;
 
 use Sabre\HTTP\Request;
 use Sabre\HTTP\Response;
-use Sabre\HTTP\Sapi;
 
 /**
  * This class may be used as a basis for other webdav-related unittests.
@@ -16,8 +17,8 @@ use Sabre\HTTP\Sapi;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
-
+abstract class DAVServerTest extends \PHPUnit\Framework\TestCase
+{
     protected $setupCalDAV = false;
     protected $setupCardDAV = false;
     protected $setupACL = false;
@@ -33,7 +34,7 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
     /**
      * An array with calendars. Every calendar should have
      *   - principaluri
-     *   - uri
+     *   - uri.
      */
     protected $caldavCalendars = [];
     protected $caldavCalendarObjects = [];
@@ -54,27 +55,27 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
     protected $propertyStorageBackend;
 
     /**
-     * @var Sabre\CalDAV\Plugin
+     * @var \Sabre\CalDAV\Plugin
      */
     protected $caldavPlugin;
 
     /**
-     * @var Sabre\CardDAV\Plugin
+     * @var \Sabre\CardDAV\Plugin
      */
     protected $carddavPlugin;
 
     /**
-     * @var Sabre\DAVACL\Plugin
+     * @var \Sabre\DAVACL\Plugin
      */
     protected $aclPlugin;
 
     /**
-     * @var Sabre\CalDAV\SharingPlugin
+     * @var \Sabre\CalDAV\SharingPlugin
      */
     protected $caldavSharingPlugin;
 
     /**
-     * CalDAV scheduling plugin
+     * CalDAV scheduling plugin.
      *
      * @var CalDAV\Schedule\Plugin
      */
@@ -108,14 +109,13 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
      */
     protected $autoLogin = null;
 
-    function setUp() {
-
+    public function setUp()
+    {
         $this->initializeEverything();
-
     }
 
-    function initializeEverything() {
-
+    public function initializeEverything()
+    {
         $this->setUpBackends();
         $this->setUpTree();
 
@@ -173,7 +173,6 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
             $this->aclPlugin->adminPrincipals = ['principals/admin'];
             $this->server->addPlugin($this->aclPlugin);
         }
-
     }
 
     /**
@@ -187,11 +186,12 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
      * the test.
      *
      * @param array|\Sabre\HTTP\Request $request
-     * @param int $expectedStatus
+     * @param int                       $expectedStatus
+     *
      * @return \Sabre\HTTP\Response
      */
-    function request($request, $expectedStatus = null) {
-
+    public function request($request, $expectedStatus = null)
+    {
         if (is_array($request)) {
             $request = HTTP\Request::createFromServerArray($request);
         }
@@ -203,10 +203,10 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
 
         if ($expectedStatus) {
             $responseBody = $expectedStatus !== $response->getStatus() ? $response->getBodyAsString() : '';
-            $this->assertEquals($expectedStatus, $response->getStatus(), 'Incorrect HTTP status received for request. Response body: ' . $responseBody);
+            $this->assertEquals($expectedStatus, $response->getStatus(), 'Incorrect HTTP status received for request. Response body: '.$responseBody);
         }
-        return $this->server->httpResponse;
 
+        return $this->server->httpResponse;
     }
 
     /**
@@ -215,9 +215,10 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
      *
      * @param string $userName
      */
-    function autoLogin($userName) {
+    public function autoLogin($userName)
+    {
         $authBackend = new DAV\Auth\Backend\Mock();
-        $authBackend->setPrincipal('principals/' . $userName);
+        $authBackend->setPrincipal('principals/'.$userName);
         $this->authPlugin = new DAV\Auth\Plugin($authBackend);
 
         // If the auth plugin already exists, we're removing its hooks:
@@ -227,14 +228,14 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
         $this->server->addPlugin($this->authPlugin);
 
         // This will trigger the actual login procedure
-        $this->authPlugin->beforeMethod(new Request(), new Response());
+        $this->authPlugin->beforeMethod(new Request('GET', '/'), new Response());
     }
 
     /**
      * Override this to provide your own Tree for your test-case.
      */
-    function setUpTree() {
-
+    public function setUpTree()
+    {
         if ($this->setupCalDAV) {
             $this->tree[] = new CalDAV\CalendarRoot(
                 $this->principalBackend,
@@ -258,15 +259,12 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
             );
         }
         if ($this->setupFiles) {
-
             $this->tree[] = new DAV\Mock\Collection('files');
-
         }
-
     }
 
-    function setUpBackends() {
-
+    public function setUpBackends()
+    {
         if ($this->setupCalDAVSharing && is_null($this->caldavBackend)) {
             $this->caldavBackend = new CalDAV\Backend\MockSharing($this->caldavCalendars, $this->caldavCalendarObjects);
         }
@@ -289,18 +287,14 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
         if ($this->setupLocks) {
             $this->locksBackend = new DAV\Locks\Backend\Mock();
         }
-        if ($this->setupPropertyStorage)  {
+        if ($this->setupPropertyStorage) {
             $this->propertyStorageBackend = new DAV\PropertyStorage\Backend\Mock();
         }
-
     }
 
-
-    function assertHttpStatus($expectedStatus, HTTP\Request $req) {
-
+    public function assertHttpStatus($expectedStatus, HTTP\Request $req)
+    {
         $resp = $this->request($req);
-        $this->assertEquals((int)$expectedStatus, (int)$resp->status, 'Incorrect HTTP status received: ' . $resp->body);
-
+        $this->assertEquals((int) $expectedStatus, (int) $resp->status, 'Incorrect HTTP status received: '.$resp->body);
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/HTTP/ResponseMock.php b/vendor/sabre/dav/tests/Sabre/HTTP/ResponseMock.php
index eb486bf5b..c5357928a 100644
--- a/vendor/sabre/dav/tests/Sabre/HTTP/ResponseMock.php
+++ b/vendor/sabre/dav/tests/Sabre/HTTP/ResponseMock.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
- * HTTP Response Mock object
+ * HTTP Response Mock object.
  *
  * This class exists to make the transition to sabre/http easier.
  *
@@ -11,12 +13,11 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ResponseMock extends Response {
-
+class ResponseMock extends Response
+{
     /**
      * Making these public.
      */
     public $body;
     public $status;
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/TestUtil.php b/vendor/sabre/dav/tests/Sabre/TestUtil.php
index 9df94915f..4e7ca2fc4 100644
--- a/vendor/sabre/dav/tests/Sabre/TestUtil.php
+++ b/vendor/sabre/dav/tests/Sabre/TestUtil.php
@@ -1,71 +1,66 @@
 <?php
 
-namespace Sabre;
+declare(strict_types=1);
 
-class TestUtil {
+namespace Sabre;
 
+class TestUtil
+{
     /**
      * This function deletes all the contents of the temporary directory.
-     *
-     * @return void
      */
-    static function clearTempDir() {
-
+    public static function clearTempDir()
+    {
         self::deleteTree(SABRE_TEMPDIR, false);
-
     }
 
-
-    private static function deleteTree($path, $deleteRoot = true) {
-
+    private static function deleteTree($path, $deleteRoot = true)
+    {
         foreach (scandir($path) as $node) {
-
-            if ($node == '.' || $node == '..') continue;
-            $myPath = $path . '/' . $node;
+            if ('.' == $node || '..' == $node) {
+                continue;
+            }
+            $myPath = $path.'/'.$node;
             if (is_file($myPath)) {
                 unlink($myPath);
             } else {
                 self::deleteTree($myPath);
             }
-
         }
         if ($deleteRoot) {
             rmdir($path);
         }
-
     }
 
-    static function getMySQLDB() {
-
+    public static function getMySQLDB()
+    {
         try {
             $pdo = new \PDO(SABRE_MYSQLDSN, SABRE_MYSQLUSER, SABRE_MYSQLPASS);
             $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
+
             return $pdo;
         } catch (\PDOException $e) {
             return null;
         }
-
     }
 
-    static function getSQLiteDB() {
-
-        $pdo = new \PDO('sqlite:' . SABRE_TEMPDIR . '/pdobackend');
+    public static function getSQLiteDB()
+    {
+        $pdo = new \PDO('sqlite:'.SABRE_TEMPDIR.'/pdobackend');
         $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
-        return $pdo;
 
+        return $pdo;
     }
 
-    static function getPgSqlDB() {
-
+    public static function getPgSqlDB()
+    {
         //try {
-            $pdo = new \PDO(SABRE_PGSQLDSN);
-            $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
-            return $pdo;
+        $pdo = new \PDO(SABRE_PGSQLDSN);
+        $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
+
+        return $pdo;
         //} catch (\PDOException $e) {
         //    return null;
         //}
-
     }
-
-
 }
diff --git a/vendor/sabre/dav/tests/bootstrap.php b/vendor/sabre/dav/tests/bootstrap.php
index 26eb32aa2..03e6006b9 100644
--- a/vendor/sabre/dav/tests/bootstrap.php
+++ b/vendor/sabre/dav/tests/bootstrap.php
@@ -1,38 +1,59 @@
 <?php
 
-set_include_path(__DIR__ . '/../lib/' . PATH_SEPARATOR . __DIR__ . PATH_SEPARATOR . get_include_path());
+declare(strict_types=1);
 
-$autoLoader = include __DIR__ . '/../vendor/autoload.php';
+set_include_path(__DIR__.'/../lib/'.PATH_SEPARATOR.__DIR__.PATH_SEPARATOR.get_include_path());
+
+$autoLoader = include __DIR__.'/../vendor/autoload.php';
 
 // SabreDAV tests auto loading
 $autoLoader->add('Sabre\\', __DIR__);
 // VObject tests auto loading
-$autoLoader->addPsr4('Sabre\\VObject\\', __DIR__ . '/../vendor/sabre/vobject/tests/VObject');
-$autoLoader->addPsr4('Sabre\\Xml\\', __DIR__ . '/../vendor/sabre/xml/tests/Sabre/Xml');
+$autoLoader->addPsr4('Sabre\\VObject\\', __DIR__.'/../vendor/sabre/vobject/tests/VObject');
+$autoLoader->addPsr4('Sabre\\Xml\\', __DIR__.'/../vendor/sabre/xml/tests/Sabre/Xml');
 
 date_default_timezone_set('UTC');
 
+// List of variables that can be set by the environment
+$environmentVars = [
+    'SABRE_MYSQLUSER',
+    'SABRE_MYSQLPASS',
+    'SABRE_MYSQLDSN',
+    'SABRE_PGSQLDSN',
+];
+foreach ($environmentVars as $var) {
+    if ($value = getenv($var)) {
+        define($var, $value);
+    }
+}
+
 $config = [
-    'SABRE_TEMPDIR'   => dirname(__FILE__) . '/temp/',
+    'SABRE_TEMPDIR' => dirname(__FILE__).'/temp/',
     'SABRE_HASSQLITE' => in_array('sqlite', PDO::getAvailableDrivers()),
-    'SABRE_HASMYSQL'  => in_array('mysql', PDO::getAvailableDrivers()),
-    'SABRE_HASPGSQL'  => in_array('pgsql', PDO::getAvailableDrivers()),
-    'SABRE_MYSQLDSN'  => 'mysql:host=127.0.0.1;dbname=sabredav_test',
+    'SABRE_HASMYSQL' => in_array('mysql', PDO::getAvailableDrivers()),
+    'SABRE_HASPGSQL' => in_array('pgsql', PDO::getAvailableDrivers()),
+    'SABRE_MYSQLDSN' => 'mysql:host=127.0.0.1;dbname=sabredav_test',
     'SABRE_MYSQLUSER' => 'sabredav',
     'SABRE_MYSQLPASS' => '',
-    'SABRE_PGSQLDSN'  => 'pgsql:host=localhost;dbname=sabredav_test;user=sabredav;password=sabredav',
+    'SABRE_PGSQLDSN' => 'pgsql:host=localhost;dbname=sabredav_test;user=sabredav;password=sabredav',
 ];
 
-if (file_exists(__DIR__ . '/config.user.php')) {
-    include __DIR__ . '/config.user.php';
+if (file_exists(__DIR__.'/config.user.php')) {
+    include __DIR__.'/config.user.php';
     foreach ($userConfig as $key => $value) {
         $config[$key] = $value;
     }
 }
 
 foreach ($config as $key => $value) {
-    if (!defined($key)) define($key, $value);
+    if (!defined($key)) {
+        define($key, $value);
+    }
 }
 
-if (!file_exists(SABRE_TEMPDIR)) mkdir(SABRE_TEMPDIR);
-if (file_exists('.sabredav')) unlink('.sabredav');
+if (!file_exists(SABRE_TEMPDIR)) {
+    mkdir(SABRE_TEMPDIR);
+}
+if (file_exists('.sabredav')) {
+    unlink('.sabredav');
+}
diff --git a/vendor/sabre/event/.gitattributes b/vendor/sabre/event/.gitattributes
new file mode 100644
index 000000000..0fdd4b01c
--- /dev/null
+++ b/vendor/sabre/event/.gitattributes
@@ -0,0 +1,2 @@
+/examples          export-ignore
+/tests             export-ignore
diff --git a/vendor/sabre/event/.travis.yml b/vendor/sabre/event/.travis.yml
index b6719f591..020488b79 100644
--- a/vendor/sabre/event/.travis.yml
+++ b/vendor/sabre/event/.travis.yml
@@ -1,13 +1,8 @@
 language: php
 php:
-  - 5.5
-  - 5.6
-  - 7
-  - hhvm
-
-matrix:
-  allow_failures:
-    - php: hhvm
+  - 7.0
+  - 7.1
+  - 7.2
 
 env:
   matrix:
diff --git a/vendor/sabre/event/CHANGELOG.md b/vendor/sabre/event/CHANGELOG.md
index 9d6d7cfaa..5b1fb2e68 100644
--- a/vendor/sabre/event/CHANGELOG.md
+++ b/vendor/sabre/event/CHANGELOG.md
@@ -1,5 +1,49 @@
 ChangeLog
 =========
+5.0.3 (2018-05-03)
+------------------
+
+* Dropped remaining hhvm leftovers.
+* #55: Fixed typo in WildcardEmitterTrait (@SamMousa)
+* #54: export-ignore examples & tests in distribution (@staabm)
+
+5.0.2 (2017-04-29)
+------------------
+
+* #50: Fixed Promise\all to resolve immediately for empty arrays (@MadHed)
+* #48, #49: Performance optimisations for EmitterTrait and WildcardEmitterTrait (@lunixyacht).
+
+5.0.1 (2016-10-29)
+------------------
+
+* #45: Fixed `Emitter` class to use the correct interface. (@felixfbecker).
+
+
+5.0.0 (2016-10-23)
+------------------
+
+* #42: The `coroutine` function now supports `return` in the passed generator
+  function. This allows you to more generally return a value. This is a BC
+  break as this is a feature that was only made possible with PHP 7, and
+  before the coroutine function would only ever return the last thing that
+  was yielded. If you depended on that feature, replace your last `yield` with
+  a `return`.
+
+
+4.0.0 (2016-09-19)
+------------------
+
+* sabre/event now requires PHP 7. If you need PHP 5.5 support, just keep
+  using 3.0.0.
+* PHP 7 type hints are now used everywhere. We're also using strict_types.
+* Support for a new `WildcardEmitter` which allows you to listen for events
+  using the `*` wildcard.
+* Removed deprecated functions `Promise::error` and `Promise::all`. Instead,
+  use `Promise::otherwise` and `Promise\all()`.
+* `EventEmitter`, `EventEmitterTrait` and `EventEmitterInterface` are now just
+  called `Emitter`, `EmitterTrait`, and `EmitterInterface`.
+* When rejecting Promises, it's now _required_ to use an `Exception` or
+  `Throwable`. This makes the typical case simpler and reduces special cases.
 
 3.0.0 (2015-11-05)
 ------------------
diff --git a/vendor/sabre/event/LICENSE b/vendor/sabre/event/LICENSE
index 9a495cef0..962a49267 100644
--- a/vendor/sabre/event/LICENSE
+++ b/vendor/sabre/event/LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/)
+Copyright (C) 2013-2016 fruux GmbH (https://fruux.com/)
 
 All rights reserved.
 
diff --git a/vendor/sabre/event/README.md b/vendor/sabre/event/README.md
index 364906fd4..9e2bdd042 100644
--- a/vendor/sabre/event/README.md
+++ b/vendor/sabre/event/README.md
@@ -17,7 +17,7 @@ Installation
 
 Make sure you have [composer][3] installed, and then run:
 
-    composer require sabre/event "~3.0.0"
+    composer require sabre/event "^3.0"
 
 This package requires PHP 5.5. The 2.0 branch is still maintained as well, and
 supports PHP 5.4.
@@ -27,10 +27,11 @@ Build status
 
 | branch | status |
 | ------ | ------ |
-| master | [![Build Status](https://travis-ci.org/fruux/sabre-event.svg?branch=master)](https://travis-ci.org/fruux/sabre-event) |
-| 2.0    | [![Build Status](https://travis-ci.org/fruux/sabre-event.svg?branch=2.0)](https://travis-ci.org/fruux/sabre-event) |
-| 1.0    | [![Build Status](https://travis-ci.org/fruux/sabre-event.svg?branch=1.0)](https://travis-ci.org/fruux/sabre-event) |
-| php53  | [![Build Status](https://travis-ci.org/fruux/sabre-event.svg?branch=php53)](https://travis-ci.org/fruux/sabre-event) |
+| master | [![Build Status](https://travis-ci.org/sabre-io/event.svg?branch=master)](https://travis-ci.org/sabre-io/event) |
+| 3.0    | [![Build Status](https://travis-ci.org/sabre-io/event.svg?branch=2.0)](https://travis-ci.org/sabre-io/event) |
+| 2.0    | [![Build Status](https://travis-ci.org/sabre-io/event.svg?branch=2.0)](https://travis-ci.org/sabre-io/event) |
+| 1.0    | [![Build Status](https://travis-ci.org/sabre-io/event.svg?branch=1.0)](https://travis-ci.org/sabre-io/event) |
+| php53  | [![Build Status](https://travis-ci.org/sabre-io/event.svg?branch=php53)](https://travis-ci.org/sabre-io/event) |
 
 
 Questions?
diff --git a/vendor/sabre/event/_config.yml b/vendor/sabre/event/_config.yml
new file mode 100644
index 000000000..c4192631f
--- /dev/null
+++ b/vendor/sabre/event/_config.yml
@@ -0,0 +1 @@
+theme: jekyll-theme-cayman
\ No newline at end of file
diff --git a/vendor/sabre/event/composer.json b/vendor/sabre/event/composer.json
index 9a11b01aa..d7a13c5ca 100644
--- a/vendor/sabre/event/composer.json
+++ b/vendor/sabre/event/composer.json
@@ -8,12 +8,15 @@
         "Hooks",
         "Plugin",
         "Signal",
-        "Async"
+        "Async",
+        "EventLoop",
+        "Reactor",
+        "Coroutine"
     ],
     "homepage": "http://sabre.io/event/",
     "license": "BSD-3-Clause",
     "require": {
-        "php": ">=5.5"
+        "php": ">=7.0"
     },
     "authors": [
         {
@@ -38,8 +41,8 @@
         ]
     },
     "require-dev": {
-        "sabre/cs": "~0.0.4",
-        "phpunit/phpunit" : "*"
+        "sabre/cs": "~1.0.0",
+        "phpunit/phpunit" : ">=6"
     },
     "config" : {
         "bin-dir" : "bin/"
diff --git a/vendor/sabre/event/lib/Emitter.php b/vendor/sabre/event/lib/Emitter.php
new file mode 100644
index 000000000..ab5e8c90e
--- /dev/null
+++ b/vendor/sabre/event/lib/Emitter.php
@@ -0,0 +1,18 @@
+<?php declare (strict_types=1);
+
+namespace Sabre\Event;
+
+/**
+ * Emitter object.
+ *
+ * Instantiate this class, or subclass it for easily creating event emitters.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Emitter implements EmitterInterface {
+
+    use EmitterTrait;
+
+}
diff --git a/vendor/sabre/event/lib/EventEmitterInterface.php b/vendor/sabre/event/lib/EmitterInterface.php
index 0e2be2cef..a7e4b6132 100644
--- a/vendor/sabre/event/lib/EventEmitterInterface.php
+++ b/vendor/sabre/event/lib/EmitterInterface.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event;
 
@@ -8,31 +8,25 @@ namespace Sabre\Event;
  * Anything that accepts listeners and emits events should implement this
  * interface.
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface EventEmitterInterface {
+interface EmitterInterface {
 
     /**
      * Subscribe to an event.
      *
-     * @param string $eventName
-     * @param callable $callBack
-     * @param int $priority
      * @return void
      */
-    function on($eventName, callable $callBack, $priority = 100);
+    function on(string $eventName, callable $callBack, int $priority = 100);
 
     /**
      * Subscribe to an event exactly once.
      *
-     * @param string $eventName
-     * @param callable $callBack
-     * @param int $priority
      * @return void
      */
-    function once($eventName, callable $callBack, $priority = 100);
+    function once(string $eventName, callable $callBack, int $priority = 100);
 
     /**
      * Emits an event.
@@ -54,13 +48,8 @@ interface EventEmitterInterface {
      *
      * Lastly, if there are 5 event handlers for an event. The continueCallback
      * will be called at most 4 times.
-     *
-     * @param string $eventName
-     * @param array $arguments
-     * @param callback $continueCallBack
-     * @return bool
      */
-    function emit($eventName, array $arguments = [], callable $continueCallBack = null);
+    function emit(string $eventName, array $arguments = [], callable $continueCallBack = null) : bool;
 
     /**
      * Returns the list of listeners for an event.
@@ -68,22 +57,17 @@ interface EventEmitterInterface {
      * The list is returned as an array, and the list of events are sorted by
      * their priority.
      *
-     * @param string $eventName
      * @return callable[]
      */
-    function listeners($eventName);
+    function listeners(string $eventName) : array;
 
     /**
      * Removes a specific listener from an event.
      *
      * If the listener could not be found, this method will return false. If it
      * was removed it will return true.
-     *
-     * @param string $eventName
-     * @param callable $listener
-     * @return bool
      */
-    function removeListener($eventName, callable $listener);
+    function removeListener(string $eventName, callable $listener) : bool;
 
     /**
      * Removes all listeners.
@@ -92,9 +76,8 @@ interface EventEmitterInterface {
      * removed. If it is not specified, every listener for every event is
      * removed.
      *
-     * @param string $eventName
      * @return void
      */
-    function removeAllListeners($eventName = null);
+    function removeAllListeners(string $eventName = null);
 
 }
diff --git a/vendor/sabre/event/lib/EventEmitterTrait.php b/vendor/sabre/event/lib/EmitterTrait.php
index 257629fae..dafae362f 100644
--- a/vendor/sabre/event/lib/EventEmitterTrait.php
+++ b/vendor/sabre/event/lib/EmitterTrait.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event;
 
@@ -11,28 +11,19 @@ namespace Sabre\Event;
  * Using the trait + interface allows you to add EventEmitter capabilities
  * without having to change your base-class.
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-trait EventEmitterTrait {
+trait EmitterTrait {
 
-    /**
-     * The list of listeners
-     *
-     * @var array
-     */
-    protected $listeners = [];
 
     /**
      * Subscribe to an event.
      *
-     * @param string $eventName
-     * @param callable $callBack
-     * @param int $priority
      * @return void
      */
-    function on($eventName, callable $callBack, $priority = 100) {
+    function on(string $eventName, callable $callBack, int $priority = 100) {
 
         if (!isset($this->listeners[$eventName])) {
             $this->listeners[$eventName] = [
@@ -51,18 +42,15 @@ trait EventEmitterTrait {
     /**
      * Subscribe to an event exactly once.
      *
-     * @param string $eventName
-     * @param callable $callBack
-     * @param int $priority
      * @return void
      */
-    function once($eventName, callable $callBack, $priority = 100) {
+    function once(string $eventName, callable $callBack, int $priority = 100) {
 
         $wrapper = null;
         $wrapper = function() use ($eventName, $callBack, &$wrapper) {
 
             $this->removeListener($eventName, $wrapper);
-            return call_user_func_array($callBack, func_get_args());
+            return \call_user_func_array($callBack, \func_get_args());
 
         };
 
@@ -90,19 +78,14 @@ trait EventEmitterTrait {
      *
      * Lastly, if there are 5 event handlers for an event. The continueCallback
      * will be called at most 4 times.
-     *
-     * @param string $eventName
-     * @param array $arguments
-     * @param callback $continueCallBack
-     * @return bool
      */
-    function emit($eventName, array $arguments = [], callable $continueCallBack = null) {
+    function emit(string $eventName, array $arguments = [], callable $continueCallBack = null) : bool {
 
-        if (is_null($continueCallBack)) {
+        if (\is_null($continueCallBack)) {
 
             foreach ($this->listeners($eventName) as $listener) {
 
-                $result = call_user_func_array($listener, $arguments);
+                $result = \call_user_func_array($listener, $arguments);
                 if ($result === false) {
                     return false;
                 }
@@ -111,12 +94,12 @@ trait EventEmitterTrait {
         } else {
 
             $listeners = $this->listeners($eventName);
-            $counter = count($listeners);
+            $counter = \count($listeners);
 
             foreach ($listeners as $listener) {
 
                 $counter--;
-                $result = call_user_func_array($listener, $arguments);
+                $result = \call_user_func_array($listener, $arguments);
                 if ($result === false) {
                     return false;
                 }
@@ -139,10 +122,9 @@ trait EventEmitterTrait {
      * The list is returned as an array, and the list of events are sorted by
      * their priority.
      *
-     * @param string $eventName
      * @return callable[]
      */
-    function listeners($eventName) {
+    function listeners(string $eventName) : array {
 
         if (!isset($this->listeners[$eventName])) {
             return [];
@@ -152,7 +134,7 @@ trait EventEmitterTrait {
         if (!$this->listeners[$eventName][0]) {
 
             // Sorting
-            array_multisort($this->listeners[$eventName][1], SORT_NUMERIC, $this->listeners[$eventName][2]);
+            \array_multisort($this->listeners[$eventName][1], SORT_NUMERIC, $this->listeners[$eventName][2]);
 
             // Marking the listeners as sorted
             $this->listeners[$eventName][0] = true;
@@ -167,12 +149,8 @@ trait EventEmitterTrait {
      *
      * If the listener could not be found, this method will return false. If it
      * was removed it will return true.
-     *
-     * @param string $eventName
-     * @param callable $listener
-     * @return bool
      */
-    function removeListener($eventName, callable $listener) {
+    function removeListener(string $eventName, callable $listener) : bool {
 
         if (!isset($this->listeners[$eventName])) {
             return false;
@@ -195,12 +173,11 @@ trait EventEmitterTrait {
      * removed. If it is not specified, every listener for every event is
      * removed.
      *
-     * @param string $eventName
      * @return void
      */
-    function removeAllListeners($eventName = null) {
+    function removeAllListeners(string $eventName = null) {
 
-        if (!is_null($eventName)) {
+        if (!\is_null($eventName)) {
             unset($this->listeners[$eventName]);
         } else {
             $this->listeners = [];
@@ -208,4 +185,11 @@ trait EventEmitterTrait {
 
     }
 
+    /**
+     * The list of listeners
+     *
+     * @var array
+     */
+    protected $listeners = [];
+
 }
diff --git a/vendor/sabre/event/lib/EventEmitter.php b/vendor/sabre/event/lib/EventEmitter.php
index 1bb1c3cf9..cae6ac2a6 100644
--- a/vendor/sabre/event/lib/EventEmitter.php
+++ b/vendor/sabre/event/lib/EventEmitter.php
@@ -1,18 +1,19 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event;
 
 /**
- * EventEmitter object.
+ * This is the old name for the Emitter class.
  *
- * Instantiate this class, or subclass it for easily creating event emitters.
+ * Instead of of using EventEmitter, please use Emitter. They are identical
+ * otherwise.
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class EventEmitter implements EventEmitterInterface {
+class EventEmitter implements EmitterInterface {
 
-    use EventEmitterTrait;
+    use EmitterTrait;
 
 }
diff --git a/vendor/sabre/event/lib/Loop/Loop.php b/vendor/sabre/event/lib/Loop/Loop.php
index 86ee7c8b0..301fe8920 100644
--- a/vendor/sabre/event/lib/Loop/Loop.php
+++ b/vendor/sabre/event/lib/Loop/Loop.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event\Loop;
 
@@ -11,7 +11,7 @@ namespace Sabre\Event\Loop;
  *   * setInterval for repeating functions
  *   * stream events using stream_select
  *
- * @copyright Copyright (C) 2007-2015 fruux GmbH. (https://fruux.com/)
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -20,11 +20,9 @@ class Loop {
     /**
      * Executes a function after x seconds.
      *
-     * @param callable $cb
-     * @param float $timeout timeout in seconds
      * @return void
      */
-    function setTimeout(callable $cb, $timeout) {
+    function setTimeout(callable $cb, float $timeout) {
 
         $triggerTime = microtime(true) + ($timeout);
 
@@ -63,12 +61,8 @@ class Loop {
      *
      * The value this function returns can be used to stop the interval with
      * clearInterval.
-     *
-     * @param callable $cb
-     * @param float $timeout
-     * @return array
      */
-    function setInterval(callable $cb, $timeout) {
+    function setInterval(callable $cb, float $timeout) : array {
 
         $keepGoing = true;
         $f = null;
@@ -92,12 +86,11 @@ class Loop {
     }
 
     /**
-     * Stops a running internval.
+     * Stops a running interval.
      *
-     * @param array $intervalId
      * @return void
      */
-    function clearInterval($intervalId) {
+    function clearInterval(array $intervalId) {
 
         $intervalId[1] = false;
 
@@ -106,7 +99,6 @@ class Loop {
     /**
      * Runs a function immediately at the next iteration of the loop.
      *
-     * @param callable $cb
      * @return void
      */
     function nextTick(callable $cb) {
@@ -126,7 +118,6 @@ class Loop {
      * prevent the eventloop from never stopping.
      *
      * @param resource $stream
-     * @param callable $cb
      * @return void
      */
     function addReadStream($stream, callable $cb) {
@@ -146,7 +137,6 @@ class Loop {
      * prevent the eventloop from never stopping.
      *
      * @param resource $stream
-     * @param callable $cb
      * @return void
      */
     function addWriteStream($stream, callable $cb) {
@@ -219,11 +209,8 @@ class Loop {
      *
      * This function will return true if there are _any_ events left in the
      * loop after the tick.
-     *
-     * @param bool $block
-     * @return bool
      */
-    function tick($block = false) {
+    function tick(bool $block = false) : bool {
 
         $this->runNextTicks();
         $nextTimeout = $this->runTimers();
@@ -284,7 +271,7 @@ class Loop {
      *
      * If there's no more pending timers, this function returns null.
      *
-     * @return float
+     * @return float|null
      */
     protected function runTimers() {
 
@@ -295,7 +282,7 @@ class Loop {
         // Add the last timer back to the array.
         if ($timer) {
             $this->timers[] = $timer;
-            return $timer[0] - microtime(true);
+            return max(0, $timer[0] - microtime(true));
         }
 
     }
@@ -303,7 +290,10 @@ class Loop {
     /**
      * Runs all pending stream events.
      *
-     * @param float $timeout
+     * If $timeout is 0, it will return immediately. If $timeout is null, it
+     * will wait indefinitely.
+     *
+     * @param float|null timeout
      */
     protected function runStreams($timeout) {
 
@@ -312,7 +302,7 @@ class Loop {
             $read = $this->readStreams;
             $write = $this->writeStreams;
             $except = null;
-            if (stream_select($read, $write, $except, null, $timeout)) {
+            if (stream_select($read, $write, $except, ($timeout === null) ? null : 0, $timeout ? (int)($timeout * 1000000) : 0)) {
 
                 // See PHP Bug https://bugs.php.net/bug.php?id=62452
                 // Fixed in PHP7
@@ -328,7 +318,7 @@ class Loop {
             }
 
         } elseif ($this->running && ($this->nextTick || $this->timers)) {
-            usleep($timeout !== null ? $timeout * 1000000 : 200000);
+            usleep($timeout !== null ? intval($timeout * 1000000) : 200000);
         }
 
     }
diff --git a/vendor/sabre/event/lib/Loop/functions.php b/vendor/sabre/event/lib/Loop/functions.php
index 56c5bc8c7..b5884b2b6 100644
--- a/vendor/sabre/event/lib/Loop/functions.php
+++ b/vendor/sabre/event/lib/Loop/functions.php
@@ -1,15 +1,13 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event\Loop;
 
 /**
  * Executes a function after x seconds.
  *
- * @param callable $cb
- * @param float $timeout timeout in seconds
  * @return void
  */
-function setTimeout(callable $cb, $timeout) {
+function setTimeout(callable $cb, float $timeout) {
 
     instance()->setTimeout($cb, $timeout);
 
@@ -20,24 +18,19 @@ function setTimeout(callable $cb, $timeout) {
  *
  * The value this function returns can be used to stop the interval with
  * clearInterval.
- *
- * @param callable $cb
- * @param float $timeout
- * @return array
  */
-function setInterval(callable $cb, $timeout) {
+function setInterval(callable $cb, float $timeout) : array {
 
     return instance()->setInterval($cb, $timeout);
 
 }
 
 /**
- * Stops a running internval.
+ * Stops a running interval.
  *
- * @param array $intervalId
  * @return void
  */
-function clearInterval($intervalId) {
+function clearInterval(array $intervalId) {
 
     instance()->clearInterval($intervalId);
 
@@ -46,7 +39,6 @@ function clearInterval($intervalId) {
 /**
  * Runs a function immediately at the next iteration of the loop.
  *
- * @param callable $cb
  * @return void
  */
 function nextTick(callable $cb) {
@@ -66,7 +58,6 @@ function nextTick(callable $cb) {
  * prevent the eventloop from never stopping.
  *
  * @param resource $stream
- * @param callable $cb
  * @return void
  */
 function addReadStream($stream, callable $cb) {
@@ -85,7 +76,6 @@ function addReadStream($stream, callable $cb) {
  * prevent the eventloop from never stopping.
  *
  * @param resource $stream
- * @param callable $cb
  * @return void
  */
 function addWriteStream($stream, callable $cb) {
@@ -144,11 +134,8 @@ function run() {
  *
  * This function will return true if there are _any_ events left in the
  * loop after the tick.
- *
- * @param bool $block
- * @return bool
  */
-function tick($block = false) {
+function tick(bool $block = false) : bool {
 
     return instance()->tick($block);
 
@@ -167,10 +154,8 @@ function stop() {
 
 /**
  * Retrieves or sets the global Loop object.
- *
- * @param Loop $newLoop
  */
-function instance(Loop $newLoop = null) {
+function instance(Loop $newLoop = null) : Loop {
 
     static $loop;
     if ($newLoop) {
diff --git a/vendor/sabre/event/lib/Promise.php b/vendor/sabre/event/lib/Promise.php
index 1c874c1bd..1d04bd4d4 100644
--- a/vendor/sabre/event/lib/Promise.php
+++ b/vendor/sabre/event/lib/Promise.php
@@ -1,8 +1,9 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event;
 
 use Exception;
+use Throwable;
 
 /**
  * An implementation of the Promise pattern.
@@ -16,7 +17,7 @@ use Exception;
  *
  * To get a callback when the operation has finished, use the `then` method.
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -52,8 +53,6 @@ class Promise {
      *
      * Each are callbacks that map to $this->fulfill and $this->reject.
      * Using the executor is optional.
-     *
-     * @param callable $executor
      */
     function __construct(callable $executor = null) {
 
@@ -84,12 +83,8 @@ class Promise {
      *
      * If either of the callbacks throw an exception, the returned promise will
      * be rejected and the exception will be passed back.
-     *
-     * @param callable $onFulfilled
-     * @param callable $onRejected
-     * @return Promise
      */
-    function then(callable $onFulfilled = null, callable $onRejected = null) {
+    function then(callable $onFulfilled = null, callable $onRejected = null) : Promise {
 
         // This new subPromise will be returned from this function, and will
         // be fulfilled with the result of the onFulfilled or onRejected event
@@ -122,11 +117,8 @@ class Promise {
      *
      * Its usage is identical to then(). However, the otherwise() function is
      * preferred.
-     *
-     * @param callable $onRejected
-     * @return Promise
      */
-    function otherwise(callable $onRejected) {
+    function otherwise(callable $onRejected) : Promise {
 
         return $this->then(null, $onRejected);
 
@@ -152,13 +144,9 @@ class Promise {
     /**
      * Marks this promise as rejected, and set it's rejection reason.
      *
-     * While it's possible to use any PHP value as the reason, it's highly
-     * recommended to use an Exception for this.
-     *
-     * @param mixed $reason
      * @return void
      */
-    function reject($reason = null) {
+    function reject(Throwable $reason) {
         if ($this->state !== self::PENDING) {
             throw new PromiseAlreadyResolvedException('This promise is already resolved, and you\'re not allowed to resolve a promise more than once');
         }
@@ -181,7 +169,6 @@ class Promise {
      * one. In PHP it might be useful to call this on the last promise in a
      * chain.
      *
-     * @throws Exception
      * @return mixed
      */
     function wait() {
@@ -205,15 +192,7 @@ class Promise {
         } else {
             // If we got here, it means that the asynchronous operation
             // errored. Therefore we need to throw an exception.
-            $reason = $this->value;
-            if ($reason instanceof Exception) {
-                throw $reason;
-            } elseif (is_scalar($reason)) {
-                throw new Exception($reason);
-            } else {
-                $type = is_object($reason) ? get_class($reason) : gettype($reason);
-                throw new Exception('Promise was rejected with reason of type: ' . $type);
-            }
+            throw $this->value;
         }
 
 
@@ -272,7 +251,7 @@ class Promise {
                         // immediately fulfill the chained promise.
                         $subPromise->fulfill($result);
                     }
-                } catch (Exception $e) {
+                } catch (Throwable $e) {
                     // If the event handler threw an exception, we need to make sure that
                     // the chained promise is rejected as well.
                     $subPromise->reject($e);
@@ -287,34 +266,4 @@ class Promise {
         });
     }
 
-    /**
-     * Alias for 'otherwise'.
-     *
-     * This function is now deprecated and will be removed in a future version.
-     *
-     * @param callable $onRejected
-     * @deprecated
-     * @return Promise
-     */
-    function error(callable $onRejected) {
-
-        return $this->otherwise($onRejected);
-
-    }
-
-    /**
-     * Deprecated.
-     *
-     * Please use Sabre\Event\Promise::all
-     *
-     * @param Promise[] $promises
-     * @deprecated
-     * @return Promise
-     */
-    static function all(array $promises) {
-
-        return Promise\all($promises);
-
-    }
-
 }
diff --git a/vendor/sabre/event/lib/Promise/functions.php b/vendor/sabre/event/lib/Promise/functions.php
index 3604b8aaa..275492cbc 100644
--- a/vendor/sabre/event/lib/Promise/functions.php
+++ b/vendor/sabre/event/lib/Promise/functions.php
@@ -1,14 +1,15 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event\Promise;
 
 use Sabre\Event\Promise;
+use Throwable;
 
 /**
  * This file contains a set of functions that are useful for dealing with the
  * Promise object.
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -27,12 +28,16 @@ use Sabre\Event\Promise;
  * fail with the first Promise that fails, and its reason.
  *
  * @param Promise[] $promises
- * @return Promise
  */
-function all(array $promises) {
+function all(array $promises) : Promise {
 
     return new Promise(function($success, $fail) use ($promises) {
 
+        if (empty($promises)) {
+            $success([]);
+            return;
+        }
+
         $successCount = 0;
         $completeResult = [];
 
@@ -47,7 +52,7 @@ function all(array $promises) {
                     }
                     return $result;
                 }
-            )->error(
+            )->otherwise(
                 function($reason) use ($fail) {
                     $fail($reason);
                 }
@@ -66,9 +71,8 @@ function all(array $promises) {
  * that first promise.
  *
  * @param Promise[] $promises
- * @return Promise
  */
-function race(array $promises) {
+function race(array $promises) : Promise {
 
     return new Promise(function($success, $fail) use ($promises) {
 
@@ -106,9 +110,8 @@ function race(array $promises) {
  * promise and eventually get the same state as the followed promise.
  *
  * @param mixed $value
- * @return Promise
  */
-function resolve($value) {
+function resolve($value) : Promise {
 
     if ($value instanceof Promise) {
         return $value->then();
@@ -122,11 +125,8 @@ function resolve($value) {
 
 /**
  * Returns a Promise that will reject with the given reason.
- *
- * @param mixed $reason
- * @return Promise
  */
-function reject($reason) {
+function reject(Throwable $reason) : Promise {
 
     $promise = new Promise();
     $promise->reject($reason);
diff --git a/vendor/sabre/event/lib/PromiseAlreadyResolvedException.php b/vendor/sabre/event/lib/PromiseAlreadyResolvedException.php
index 86a6c5b3f..534a3d494 100644
--- a/vendor/sabre/event/lib/PromiseAlreadyResolvedException.php
+++ b/vendor/sabre/event/lib/PromiseAlreadyResolvedException.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event;
 
@@ -6,7 +6,7 @@ namespace Sabre\Event;
  * This exception is thrown when the user tried to reject or fulfill a promise,
  * after either of these actions were already performed.
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
diff --git a/vendor/sabre/event/lib/Version.php b/vendor/sabre/event/lib/Version.php
index 5de22193f..9aee4b3ab 100644
--- a/vendor/sabre/event/lib/Version.php
+++ b/vendor/sabre/event/lib/Version.php
@@ -1,11 +1,11 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event;
 
 /**
  * This class contains the version number for this package.
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -14,6 +14,6 @@ class Version {
     /**
      * Full version number
      */
-    const VERSION = '3.0.0';
+    const VERSION = '5.0.3';
 
 }
diff --git a/vendor/sabre/event/lib/WildcardEmitter.php b/vendor/sabre/event/lib/WildcardEmitter.php
new file mode 100644
index 000000000..2ef15fe83
--- /dev/null
+++ b/vendor/sabre/event/lib/WildcardEmitter.php
@@ -0,0 +1,37 @@
+<?php declare (strict_types=1);
+
+namespace Sabre\Event;
+
+/**
+ * This class is an EventEmitter with support for wildcard event handlers.
+ *
+ * What this means is that you can emit events like this:
+ *
+ *   emit('change:firstName')
+ *
+ * and listen to this event like this:
+ *
+ *   on('change:*')
+ *
+ * A few notes:
+ * 
+ * - Wildcards only work at the end of an event name.
+ * - Currently you can only use 1 wildcard.
+ * - Using ":" as a separator is optional, but it's highly recommended to use
+ *   some kind of separator.
+ *
+ * The WilcardEmitter is a bit slower than the regular Emitter. If you code
+ * must be very high performance, it might be better to try to use the other
+ * emitter. For must usage the difference is negligible though.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class WildcardEmitter implements EmitterInterface {
+
+    use WildcardEmitterTrait;
+
+
+
+}
diff --git a/vendor/sabre/event/lib/WildcardEmitterTrait.php b/vendor/sabre/event/lib/WildcardEmitterTrait.php
new file mode 100644
index 000000000..7d8d62c26
--- /dev/null
+++ b/vendor/sabre/event/lib/WildcardEmitterTrait.php
@@ -0,0 +1,264 @@
+<?php declare (strict_types=1);
+
+namespace Sabre\Event;
+
+/**
+ * Wildcard Emitter Trait
+ *
+ * This trait provides the implementation for WildCardEmitter
+ * Refer to that class for the full documentation about this
+ * trait.
+ *
+ * Normally you can just instantiate that class, but if you want to add
+ * emitter functionality to existing classes, using the trait might be a
+ * better way to do this.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+trait WildcardEmitterTrait {
+
+    /**
+     * Subscribe to an event.
+     *
+     * @return void
+     */
+    function on(string $eventName, callable $callBack, int $priority = 100) {
+
+        // If it ends with a wildcard, we use the wildcardListeners array 
+        if ($eventName[\strlen($eventName) - 1] === '*') {
+            $eventName = \substr($eventName, 0, -1);
+            $listeners = & $this->wildcardListeners;
+        } else {
+            $listeners = & $this->listeners;
+        }
+
+        // Always fully reset the listener index. This is fairly sane for most
+        // applications, because there's a clear "event registering" and "event
+        // emitting" phase, but can be slow if there's a lot adding and removing
+        // of listeners during emitting of events.
+        $this->listenerIndex = [];
+
+        if (!isset($listeners[$eventName])) {
+            $listeners[$eventName] = [];
+        }
+        $listeners[$eventName][] = [$priority, $callBack];
+
+    }
+
+    /**
+     * Subscribe to an event exactly once.
+     *
+     * @return void
+     */
+    function once(string $eventName, callable $callBack, int $priority = 100) {
+
+        $wrapper = null;
+        $wrapper = function() use ($eventName, $callBack, &$wrapper) {
+
+            $this->removeListener($eventName, $wrapper);
+            return \call_user_func_array($callBack, \func_get_args());
+
+        };
+
+        $this->on($eventName, $wrapper, $priority);
+
+    }
+
+    /**
+     * Emits an event.
+     *
+     * This method will return true if 0 or more listeners were succesfully
+     * handled. false is returned if one of the events broke the event chain.
+     *
+     * If the continueCallBack is specified, this callback will be called every
+     * time before the next event handler is called.
+     *
+     * If the continueCallback returns false, event propagation stops. This
+     * allows you to use the eventEmitter as a means for listeners to implement
+     * functionality in your application, and break the event loop as soon as
+     * some condition is fulfilled.
+     *
+     * Note that returning false from an event subscriber breaks propagation
+     * and returns false, but if the continue-callback stops propagation, this
+     * is still considered a 'successful' operation and returns true.
+     *
+     * Lastly, if there are 5 event handlers for an event. The continueCallback
+     * will be called at most 4 times.
+     */
+    function emit(string $eventName, array $arguments = [], callable $continueCallBack = null) : bool {
+
+        if (\is_null($continueCallBack)) {
+
+            foreach ($this->listeners($eventName) as $listener) {
+
+                $result = \call_user_func_array($listener, $arguments);
+                if ($result === false) {
+                    return false;
+                }
+            }
+
+        } else {
+
+            $listeners = $this->listeners($eventName);
+            $counter = \count($listeners);
+
+            foreach ($listeners as $listener) {
+
+                $counter--;
+                $result = \call_user_func_array($listener, $arguments);
+                if ($result === false) {
+                    return false;
+                }
+
+                if ($counter > 0) {
+                    if (!$continueCallBack()) break;
+                }
+
+            }
+
+        }
+
+        return true;
+
+
+    }
+
+    /**
+     * Returns the list of listeners for an event.
+     *
+     * The list is returned as an array, and the list of events are sorted by
+     * their priority.
+     *
+     * @return callable[]
+     */
+    function listeners(string $eventName) : array {
+
+        if (!\array_key_exists($eventName, $this->listenerIndex)) {
+
+            // Create a new index.
+            $listeners = [];
+            $listenersPriority = [];
+            if (isset($this->listeners[$eventName])) foreach ($this->listeners[$eventName] as $listener) {
+
+                $listenersPriority[] = $listener[0];
+                $listeners[] = $listener[1];
+
+            }
+
+            foreach ($this->wildcardListeners as $wcEvent => $wcListeners) {
+
+                // Wildcard match
+                if (\substr($eventName, 0, \strlen($wcEvent)) === $wcEvent) {
+
+                    foreach ($wcListeners as $listener) {
+
+                        $listenersPriority[] = $listener[0];
+                        $listeners[] = $listener[1];
+
+                    }
+
+                }
+
+            }
+
+            // Sorting by priority
+            \array_multisort($listenersPriority, SORT_NUMERIC, $listeners);
+
+            // Creating index
+            $this->listenerIndex[$eventName] = $listeners;
+
+        }
+
+        return $this->listenerIndex[$eventName];
+
+    }
+
+    /**
+     * Removes a specific listener from an event.
+     *
+     * If the listener could not be found, this method will return false. If it
+     * was removed it will return true.
+     */
+    function removeListener(string $eventName, callable $listener) : bool {
+
+        // If it ends with a wildcard, we use the wildcardListeners array 
+        if ($eventName[\strlen($eventName) - 1] === '*') {
+            $eventName = \substr($eventName, 0, -1);
+            $listeners = & $this->wildcardListeners;
+        } else {
+            $listeners = & $this->listeners;
+        }
+
+        if (!isset($listeners[$eventName])) {
+            return false;
+        }
+
+        foreach ($listeners[$eventName] as $index => $check) {
+
+            if ($check[1] === $listener) {
+
+                // Remove listener
+                unset($listeners[$eventName][$index]);
+                // Reset index
+                $this->listenerIndex = [];
+                return true;
+
+            }
+
+        }
+
+        return false;
+
+    }
+
+    /**
+     * Removes all listeners.
+     *
+     * If the eventName argument is specified, all listeners for that event are
+     * removed. If it is not specified, every listener for every event is
+     * removed.
+     *
+     * @return void
+     */
+    function removeAllListeners(string $eventName = null) {
+
+        if (\is_null($eventName)) {
+            $this->listeners = [];
+            $this->wildcardListeners = [];
+
+        } else {
+
+            if ($eventName[\strlen($eventName) - 1] === '*') {
+                // Wildcard event
+                unset($this->wildcardListeners[\substr($eventName, 0, -1)]);
+            } else {
+                unset($this->listeners[$eventName]);
+            }
+
+        }
+
+        // Reset index
+        $this->listenerIndex = [];
+
+    }
+
+    /**
+     * The list of listeners
+     */
+    protected $listeners = [];
+
+    /**
+     * The list of "wildcard listeners". 
+     */
+    protected $wildcardListeners = [];
+
+    /**
+     * An index of listeners for a specific event name. This helps speeding
+     * up emitting events after all listeners have been set.
+     *
+     * If the list of listeners changes though, the index clears.
+     */
+    protected $listenerIndex = [];
+}
diff --git a/vendor/sabre/event/lib/coroutine.php b/vendor/sabre/event/lib/coroutine.php
index 19c0ba8a7..750e8ab52 100644
--- a/vendor/sabre/event/lib/coroutine.php
+++ b/vendor/sabre/event/lib/coroutine.php
@@ -1,9 +1,9 @@
-<?php
+<?php declare (strict_types=1);
 
 namespace Sabre\Event;
 
 use Generator;
-use Exception;
+use Throwable;
 
 /**
  * Turn asynchronous promise-based code into something that looks synchronous
@@ -34,17 +34,18 @@ use Exception;
  *     yield $httpClient->request('GET', '/foo');
  *     yield $httpClient->request('DELETE', /foo');
  *     yield $httpClient->request('PUT', '/foo');
- *   } catch(\Exception $reason) {
+ *   } catch(\Throwable $reason) {
  *     echo "Failed because: $reason\n";
  *   }
  *
  * });
  *
- * @copyright Copyright (C) 2013-2015 fruux GmbH. All rights reserved.
+ * @return \Sabre\Event\Promise
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-function coroutine(callable $gen) {
+function coroutine(callable $gen) : Promise {
 
     $generator = $gen();
     if (!$generator instanceof Generator) {
@@ -54,8 +55,6 @@ function coroutine(callable $gen) {
     // This is the value we're returning.
     $promise = new Promise();
 
-    $lastYieldResult = null;
-
     /**
      * So tempted to use the mythical y-combinator here, but it's not needed in
      * PHP.
@@ -68,22 +67,14 @@ function coroutine(callable $gen) {
             if ($yieldedValue instanceof Promise) {
                 $yieldedValue->then(
                     function($value) use ($generator, &$advanceGenerator, &$lastYieldResult) {
-                        $lastYieldResult = $value;
                         $generator->send($value);
                         $advanceGenerator();
                     },
-                    function($reason) use ($generator, $advanceGenerator) {
-                        if ($reason instanceof Exception) {
-                            $generator->throw($reason);
-                        } elseif (is_scalar($reason)) {
-                            $generator->throw(new Exception($reason));
-                        } else {
-                            $type = is_object($reason) ? get_class($reason) : gettype($reason);
-                            $generator->throw(new Exception('Promise was rejected with reason of type: ' . $type));
-                        }
+                    function(Throwable $reason) use ($generator, $advanceGenerator) {
+                        $generator->throw($reason);
                         $advanceGenerator();
                     }
-                )->error(function($reason) use ($promise) {
+                )->otherwise(function(Throwable $reason) use ($promise) {
                     // This error handler would be called, if something in the
                     // generator throws an exception, and it's not caught
                     // locally.
@@ -94,24 +85,38 @@ function coroutine(callable $gen) {
                 break;
             } else {
                 // If the value was not a promise, we'll just let it pass through.
-                $lastYieldResult = $yieldedValue;
                 $generator->send($yieldedValue);
             }
 
         }
 
         // If the generator is at the end, and we didn't run into an exception,
-        // we can fullfill the promise with the last thing that was yielded to
-        // us.
-        if (!$generator->valid() && $promise->state === Promise::PENDING) {
-            $promise->fulfill($lastYieldResult);
+        // We're grabbing the "return" value and fulfilling our top-level
+        // promise with its value.
+         if (!$generator->valid() && $promise->state === Promise::PENDING) {
+             $returnValue = $generator->getReturn();
+
+             // The return value is a promise.
+             if ($returnValue instanceof Promise) {
+                 $returnValue->then(function($value) use ($promise) {
+                     $promise->fulfill($value);
+                 }, function(Throwable $reason) {
+                     $promise->reject($reason);
+                 });
+             } else {
+
+                 $promise->fulfill($returnValue);
+
+             }
+
+
         }
 
     };
 
     try {
         $advanceGenerator();
-    } catch (Exception $e) {
+    } catch (Throwable $e) {
         $promise->reject($e);
     }
 
diff --git a/vendor/sabre/http/.gitignore b/vendor/sabre/http/.gitignore
index 8c97686fb..5f85ecc1b 100644
--- a/vendor/sabre/http/.gitignore
+++ b/vendor/sabre/http/.gitignore
@@ -6,10 +6,13 @@ composer.lock
 tests/cov/
 
 # Composer binaries
-bin/phpunit
-bin/phpcs
-bin/php-cs-fixer
-bin/sabre-cs-fixer
+bin/phpunit*
+bin/phpcs*
+bin/php-cs-fixer*
+bin/sabre-cs-fixer*
 
 # Vim
 .*.swp
+
+# development stuff
+.php_cs.cache
diff --git a/vendor/sabre/http/.php_cs.dist b/vendor/sabre/http/.php_cs.dist
new file mode 100644
index 000000000..8d61ee259
--- /dev/null
+++ b/vendor/sabre/http/.php_cs.dist
@@ -0,0 +1,12 @@
+<?php
+
+$config = PhpCsFixer\Config::create();
+$config->getFinder()
+    ->exclude('vendor')
+    ->in(__DIR__);
+$config->setRules([
+    '@PSR1' => true,
+    '@Symfony' =>true
+]);
+
+return $config;
\ No newline at end of file
diff --git a/vendor/sabre/http/.travis.yml b/vendor/sabre/http/.travis.yml
index 9e4964b9d..3b85d5f39 100644
--- a/vendor/sabre/http/.travis.yml
+++ b/vendor/sabre/http/.travis.yml
@@ -1,28 +1,41 @@
 language: php
+sudo: required
 php:
-  - 5.4
-  - 5.5
-  - 5.6
-  - 7
+  - 7.0
   - 7.1
-  - hhvm
+  - 7.2
+  - 7.3
+  - 7.4snapshot
+
+env:
+  global:
+    - RUN_PHPSTAN="FALSE"
+  matrix:
+    - PREFER_LOWEST="" WITH_COVERAGE="--coverage-clover=coverage.xml"
+    - PREFER_LOWEST="--prefer-lowest" $WITH_COVERAGE=""
 
 matrix:
+  include:
+    - name: 'PHPStan'
+      php: 7.2
+      env: RUN_PHPSTAN="TRUE"
   fast_finish: true
-  allow_failures:
-  - php: hhvm
 
-env:
-  matrix:
-    - PREFER_LOWEST=""
-    - PREFER_LOWEST="--prefer-lowest"
+cache:
+    directories:
+        - $HOME/.composer/cache
 
+install:
+  - if [ $RUN_PHPSTAN == "TRUE"  ]; then composer require --dev phpstan/phpstan; fi
 
 before_script:
-    - rm -f ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini
-#    - composer self-update
-    - composer update --prefer-source $PREFER_LOWEST
+  - composer update --prefer-source $PREFER_LOWEST
+  - PHP_BIN=$(phpenv which php)
+  - sudo $PHP_BIN -S localhost:80 -t $TRAVIS_BUILD_DIR/tests/www 2>/dev/null &
 
 script:
-  - ./bin/phpunit --configuration tests/phpunit.xml
-  - ./bin/sabre-cs-fixer fix . --dry-run --diff
+  - if [ $RUN_PHPSTAN == "FALSE"  ]; then ./bin/phpunit --configuration tests/phpunit.xml $WITH_COVERAGE; fi
+  - if [ $RUN_PHPSTAN == "TRUE"  ]; then php ./bin/phpstan analyse -c phpstan.neon lib; fi
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
diff --git a/vendor/sabre/http/CHANGELOG.md b/vendor/sabre/http/CHANGELOG.md
index d3dd8b2d9..a087453fa 100644
--- a/vendor/sabre/http/CHANGELOG.md
+++ b/vendor/sabre/http/CHANGELOG.md
@@ -1,11 +1,61 @@
 ChangeLog
 =========
 
-4.2.4 (2018-02-23)
-------------------
+5.0.4 (2019-10-08)
+-------------------------
+
+* #133: Fix short Content-Range download - Regression from 5.0.3 (@phil-davis)
+
+5.0.3 (2019-10-08)
+-------------------------
+
+* #119: Significantly improve file download speed by enabling mmap based stream_copy_to_stream (@vfreex) 
+
+5.0.2 (2019-09-12)
+-------------------------
+
+* #125: Fix Strict Error if Response Body Empty (@WorksDev, @phil-davis) 
 
+5.0.1 (2019-09-11)
+-------------------------
+
+* #121: fix "Trying to access array offset on value of type bool" in 7.4 (@remicollet) 
+* #115: Reduce memory footprint when parsing HTTP result (@Gasol)
+* #114: Misc code improvements (@mrcnpdlk)
+* #111, #118: Added phpstan analysis (@DeepDiver1975, @staabm)
+* #107: Tested with php 7.3 (@DeepDiver1975)
+ 
+
+5.0.0 (2018-06-04)
+-------------------------
+
+* #99: Previous CURL opts are not persisted anymore (@christiaan)
+* Final release
+
+5.0.0-alpha1 (2018-02-16)
+-------------------------
+
+* Now requires PHP 7.0+.
+* Supports sabre/event 4.x and 5.x
+* Depends on sabre/uri 2.
+* hhvm is no longer supported starting this release.
+* #65: It's now possible to supply request/response bodies using a callback
+  functions. This allows very high-speed/low-memory responses to be created.
+  (@petrkotek).
+* Strict typing is used every where this is applicable.
+* Removed `URLUtil` class. It was deprecated a long time ago, and most of
+  its functions moved to the `sabre/uri` package.
+* Removed `Util` class. Most of its functions moved to the `functions.php`
+  file.
+* #68: The `$method` and `$uri` arguments when constructing a Request object
+  are now required.
+* When `Sapi::getRequest()` is called, we default to setting the HTTP Method
+  to `CLI`.
+* The HTTP response is now initialized with HTTP code `500` instead of `null`,
+  so if it's not changed, it will be emitted as 500.
 * #69: Sending `charset="UTF-8"` on Basic authentication challenges per
   [rfc7617][rfc7617].
+* #84: Added support for `SERVER_PROTOCOL HTTP/2.0` (@jens1o)
 
 
 4.2.3 (2017-06-12)
@@ -19,6 +69,7 @@ ChangeLog
 
 * #72: Handling clients that send invalid `Content-Length` headers.
 
+
 4.2.1 (2016-01-06)
 ------------------
 
diff --git a/vendor/sabre/http/README.md b/vendor/sabre/http/README.md
index ae03a796e..8159b4d49 100644
--- a/vendor/sabre/http/README.md
+++ b/vendor/sabre/http/README.md
@@ -1,7 +1,7 @@
 sabre/http
 ==========
 
-This library provides a toolkit to make working with the HTTP protocol easier.
+This library provides a toolkit to make working with the [HTTP protocol](https://tools.ietf.org/html/rfc2616) easier.
 
 Most PHP scripts run within a HTTP request but accessing information about the
 HTTP request is cumbersome at least.
@@ -30,8 +30,9 @@ Build status
 
 | branch | status |
 | ------ | ------ |
-| master | [![Build Status](https://travis-ci.org/fruux/sabre-http.svg?branch=master)](https://travis-ci.org/fruux/sabre-http) |
-| 3.0    | [![Build Status](https://travis-ci.org/fruux/sabre-http.svg?branch=3.0)](https://travis-ci.org/fruux/sabre-http) |
+| master | [![Build Status](https://travis-ci.org/sabre-io/http.svg?branch=master)](https://travis-ci.org/sabre-io/http) |
+| 4.2    | [![Build Status](https://travis-ci.org/sabre-io/http.svg?branch=4.2)](https://travis-ci.org/sabre-io/http) |
+| 3.0    | [![Build Status](https://travis-ci.org/sabre-io/http.svg?branch=3.0)](https://travis-ci.org/sabre-io/http) |
 
 Installation
 ------------
@@ -42,7 +43,7 @@ or edit a `composer.json` file, and make sure it contains something like this:
 ```json
 {
     "require" : {
-        "sabre/http" : "~3.0.0"
+        "sabre/http" : "~5.0.0"
     }
 }
 ```
@@ -571,7 +572,7 @@ function removeHeader($name);
 /**
  * Sets the HTTP version.
  *
- * Should be 1.0 or 1.1.
+ * Should be 1.0, 1.1 or 2.0.
  *
  * @param string $version
  * @return void
@@ -716,7 +717,7 @@ function removeHeader($name);
 /**
  * Sets the HTTP version.
  *
- * Should be 1.0 or 1.1.
+ * Should be 1.0, 1.1 or 2.0.
  *
  * @param string $version
  * @return void
diff --git a/vendor/sabre/http/composer.json b/vendor/sabre/http/composer.json
index 507d5d28d..851a08730 100644
--- a/vendor/sabre/http/composer.json
+++ b/vendor/sabre/http/composer.json
@@ -5,15 +5,15 @@
     "homepage" : "https://github.com/fruux/sabre-http",
     "license" : "BSD-3-Clause",
     "require" : {
-        "php"          : ">=5.4",
+        "php"          : "^7.0",
         "ext-mbstring" : "*",
         "ext-ctype"    : "*",
-        "sabre/event"  : ">=1.0.0,<4.0.0",
-        "sabre/uri"    : "~1.0"
+        "ext-curl"     : "*",
+        "sabre/event"  : ">=4.0 <6.0",
+        "sabre/uri"    : "^2.0"
     },
     "require-dev" : {
-        "phpunit/phpunit" : "~4.3",
-        "sabre/cs" : "~0.0.1"
+        "phpunit/phpunit" : "^6.0 || ^7.0"
     },
     "suggest" : {
         "ext-curl" : " to make http requests with the Client class"
diff --git a/vendor/sabre/http/lib/Auth/AWS.php b/vendor/sabre/http/lib/Auth/AWS.php
index 5e176646a..ffda3cf15 100644
--- a/vendor/sabre/http/lib/Auth/AWS.php
+++ b/vendor/sabre/http/lib/Auth/AWS.php
@@ -1,11 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP\Auth;
 
-use Sabre\HTTP\Util;
+use Sabre\HTTP;
 
 /**
- * HTTP AWS Authentication handler
+ * HTTP AWS Authentication handler.
  *
  * Use this class to leverage amazon's AWS authentication header
  *
@@ -13,24 +15,24 @@ use Sabre\HTTP\Util;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AWS extends AbstractAuth {
-
+class AWS extends AbstractAuth
+{
     /**
-     * The signature supplied by the HTTP client
+     * The signature supplied by the HTTP client.
      *
      * @var string
      */
     private $signature = null;
 
     /**
-     * The accesskey supplied by the HTTP client
+     * The accesskey supplied by the HTTP client.
      *
      * @var string
      */
     private $accessKey = null;
 
     /**
-     * An error code, if any
+     * An error code, if any.
      *
      * This value will be filled with one of the ERR_* constants
      *
@@ -45,47 +47,45 @@ class AWS extends AbstractAuth {
     const ERR_INVALIDSIGNATURE = 5;
 
     /**
-     * Gathers all information from the headers
+     * Gathers all information from the headers.
      *
      * This method needs to be called prior to anything else.
-     *
-     * @return bool
      */
-    function init() {
-
+    public function init(): bool
+    {
         $authHeader = $this->request->getHeader('Authorization');
+
+        if (null === $authHeader) {
+            $this->errorCode = self::ERR_NOAWSHEADER;
+
+            return false;
+        }
         $authHeader = explode(' ', $authHeader);
 
-        if ($authHeader[0] != 'AWS' || !isset($authHeader[1])) {
+        if ('AWS' !== $authHeader[0] || !isset($authHeader[1])) {
             $this->errorCode = self::ERR_NOAWSHEADER;
-             return false;
+
+            return false;
         }
 
         list($this->accessKey, $this->signature) = explode(':', $authHeader[1]);
 
         return true;
-
     }
 
     /**
-     * Returns the username for the request
-     *
-     * @return string
+     * Returns the username for the request.
      */
-    function getAccessKey() {
-
+    public function getAccessKey(): string
+    {
         return $this->accessKey;
-
     }
 
     /**
-     * Validates the signature based on the secretKey
-     *
-     * @param string $secretKey
-     * @return bool
+     * Validates the signature based on the secretKey.
      */
-    function validate($secretKey) {
-
+    public function validate(string $secretKey): bool
+    {
         $contentMD5 = $this->request->getHeader('Content-MD5');
 
         if ($contentMD5) {
@@ -93,57 +93,53 @@ class AWS extends AbstractAuth {
             $body = $this->request->getBody();
             $this->request->setBody($body);
 
-            if ($contentMD5 != base64_encode(md5($body, true))) {
+            if ($contentMD5 !== base64_encode(md5((string) $body, true))) {
                 // content-md5 header did not match md5 signature of body
                 $this->errorCode = self::ERR_MD5CHECKSUMWRONG;
+
                 return false;
             }
-
         }
 
-        if (!$requestDate = $this->request->getHeader('x-amz-date'))
+        if (!$requestDate = $this->request->getHeader('x-amz-date')) {
             $requestDate = $this->request->getHeader('Date');
+        }
 
-        if (!$this->validateRFC2616Date($requestDate))
+        if (!$this->validateRFC2616Date((string) $requestDate)) {
             return false;
+        }
 
         $amzHeaders = $this->getAmzHeaders();
 
         $signature = base64_encode(
             $this->hmacsha1($secretKey,
-                $this->request->getMethod() . "\n" .
-                $contentMD5 . "\n" .
-                $this->request->getHeader('Content-type') . "\n" .
-                $requestDate . "\n" .
-                $amzHeaders .
+                $this->request->getMethod()."\n".
+                $contentMD5."\n".
+                $this->request->getHeader('Content-type')."\n".
+                $requestDate."\n".
+                $amzHeaders.
                 $this->request->getUrl()
             )
         );
 
-        if ($this->signature != $signature) {
-
+        if ($this->signature !== $signature) {
             $this->errorCode = self::ERR_INVALIDSIGNATURE;
-            return false;
 
+            return false;
         }
 
         return true;
-
     }
 
-
     /**
-     * Returns an HTTP 401 header, forcing login
+     * Returns an HTTP 401 header, forcing login.
      *
      * This should be called when username and password are incorrect, or not supplied at all
-     *
-     * @return void
      */
-    function requireLogin() {
-
+    public function requireLogin()
+    {
         $this->response->addHeader('WWW-Authenticate', 'AWS');
         $this->response->setStatus(401);
-
     }
 
     /**
@@ -154,17 +150,15 @@ class AWS extends AbstractAuth {
      *
      * This function also makes sure the Date header is within 15 minutes of the operating
      * system date, to prevent replay attacks.
-     *
-     * @param string $dateHeader
-     * @return bool
      */
-    protected function validateRFC2616Date($dateHeader) {
-
-        $date = Util::parseHTTPDate($dateHeader);
+    protected function validateRFC2616Date(string $dateHeader): bool
+    {
+        $date = HTTP\parseDate($dateHeader);
 
         // Unknown format
         if (!$date) {
             $this->errorCode = self::ERR_INVALIDDATEFORMAT;
+
             return false;
         }
 
@@ -174,47 +168,40 @@ class AWS extends AbstractAuth {
         // We allow 15 minutes around the current date/time
         if ($date > $max || $date < $min) {
             $this->errorCode = self::ERR_REQUESTTIMESKEWED;
+
             return false;
         }
 
-        return $date;
-
+        return true;
     }
 
     /**
-     * Returns a list of AMZ headers
-     *
-     * @return string
+     * Returns a list of AMZ headers.
      */
-    protected function getAmzHeaders() {
-
+    protected function getAmzHeaders(): string
+    {
         $amzHeaders = [];
         $headers = $this->request->getHeaders();
         foreach ($headers as $headerName => $headerValue) {
-            if (strpos(strtolower($headerName), 'x-amz-') === 0) {
-                $amzHeaders[strtolower($headerName)] = str_replace(["\r\n"], [' '], $headerValue[0]) . "\n";
+            if (0 === strpos(strtolower($headerName), 'x-amz-')) {
+                $amzHeaders[strtolower($headerName)] = str_replace(["\r\n"], [' '], $headerValue[0])."\n";
             }
         }
         ksort($amzHeaders);
 
         $headerStr = '';
         foreach ($amzHeaders as $h => $v) {
-            $headerStr .= $h . ':' . $v;
+            $headerStr .= $h.':'.$v;
         }
 
         return $headerStr;
-
     }
 
     /**
-     * Generates an HMAC-SHA1 signature
-     *
-     * @param string $key
-     * @param string $message
-     * @return string
+     * Generates an HMAC-SHA1 signature.
      */
-    private function hmacsha1($key, $message) {
-
+    private function hmacsha1(string $key, string $message): string
+    {
         if (function_exists('hash_hmac')) {
             return hash_hmac('sha1', $message, $key, true);
         }
@@ -226,9 +213,8 @@ class AWS extends AbstractAuth {
         $key = str_pad($key, $blocksize, chr(0x00));
         $ipad = str_repeat(chr(0x36), $blocksize);
         $opad = str_repeat(chr(0x5c), $blocksize);
-        $hmac = pack('H*', sha1(($key ^ $opad) . pack('H*', sha1(($key ^ $ipad) . $message))));
-        return $hmac;
+        $hmac = pack('H*', sha1(($key ^ $opad).pack('H*', sha1(($key ^ $ipad).$message))));
 
+        return $hmac;
     }
-
 }
diff --git a/vendor/sabre/http/lib/Auth/AbstractAuth.php b/vendor/sabre/http/lib/Auth/AbstractAuth.php
index ae45b3ee2..ada6bf0f0 100644
--- a/vendor/sabre/http/lib/Auth/AbstractAuth.php
+++ b/vendor/sabre/http/lib/Auth/AbstractAuth.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP\Auth;
 
 use Sabre\HTTP\RequestInterface;
@@ -14,60 +16,50 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class AbstractAuth {
-
+abstract class AbstractAuth
+{
     /**
-     * Authentication realm
+     * Authentication realm.
      *
      * @var string
      */
     protected $realm;
 
     /**
-     * Request object
+     * Request object.
      *
      * @var RequestInterface
      */
     protected $request;
 
     /**
-     * Response object
+     * Response object.
      *
      * @var ResponseInterface
      */
     protected $response;
 
     /**
-     * Creates the object
-     *
-     * @param string $realm
-     * @return void
+     * Creates the object.
      */
-    function __construct($realm = 'SabreTooth', RequestInterface $request, ResponseInterface $response) {
-
+    public function __construct(string $realm = 'SabreTooth', RequestInterface $request, ResponseInterface $response)
+    {
         $this->realm = $realm;
         $this->request = $request;
         $this->response = $response;
-
     }
 
     /**
      * This method sends the needed HTTP header and statuscode (401) to force
      * the user to login.
-     *
-     * @return void
      */
-    abstract function requireLogin();
+    abstract public function requireLogin();
 
     /**
-     * Returns the HTTP realm
-     *
-     * @return string
+     * Returns the HTTP realm.
      */
-    function getRealm() {
-
+    public function getRealm(): string
+    {
         return $this->realm;
-
     }
-
 }
diff --git a/vendor/sabre/http/lib/Auth/Basic.php b/vendor/sabre/http/lib/Auth/Basic.php
index c263e3f9b..d04b4a811 100644
--- a/vendor/sabre/http/lib/Auth/Basic.php
+++ b/vendor/sabre/http/lib/Auth/Basic.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP\Auth;
 
 /**
@@ -15,25 +17,25 @@ namespace Sabre\HTTP\Auth;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Basic extends AbstractAuth {
-
+class Basic extends AbstractAuth
+{
     /**
      * This method returns a numeric array with a username and password as the
      * only elements.
      *
      * If no credentials were found, this method returns null.
      *
-     * @return null|array
+     * @return array|null
      */
-    function getCredentials() {
-
+    public function getCredentials()
+    {
         $auth = $this->request->getHeader('Authorization');
 
         if (!$auth) {
             return null;
         }
 
-        if (strtolower(substr($auth, 0, 6)) !== 'basic ') {
+        if ('basic ' !== strtolower(substr($auth, 0, 6))) {
             return null;
         }
 
@@ -44,20 +46,15 @@ class Basic extends AbstractAuth {
         }
 
         return $credentials;
-
     }
 
     /**
      * This method sends the needed HTTP header and statuscode (401) to force
      * the user to login.
-     *
-     * @return void
      */
-    function requireLogin() {
-
-        $this->response->addHeader('WWW-Authenticate', 'Basic realm="' . $this->realm . '", charset="UTF-8"');
+    public function requireLogin()
+    {
+        $this->response->addHeader('WWW-Authenticate', 'Basic realm="'.$this->realm.'", charset="UTF-8"');
         $this->response->setStatus(401);
-
     }
-
 }
diff --git a/vendor/sabre/http/lib/Auth/Bearer.php b/vendor/sabre/http/lib/Auth/Bearer.php
index eefdf11ee..988bb29d2 100644
--- a/vendor/sabre/http/lib/Auth/Bearer.php
+++ b/vendor/sabre/http/lib/Auth/Bearer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP\Auth;
 
 /**
@@ -15,42 +17,37 @@ namespace Sabre\HTTP\Auth;
  * @author François Kooman (fkooman@tuxed.net)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Bearer extends AbstractAuth {
-
+class Bearer extends AbstractAuth
+{
     /**
      * This method returns a string with an access token.
      *
      * If no token was found, this method returns null.
      *
-     * @return null|string
+     * @return string|null
      */
-    function getToken() {
-
+    public function getToken()
+    {
         $auth = $this->request->getHeader('Authorization');
 
         if (!$auth) {
             return null;
         }
 
-        if (strtolower(substr($auth, 0, 7)) !== 'bearer ') {
+        if ('bearer ' !== strtolower(substr($auth, 0, 7))) {
             return null;
         }
 
         return substr($auth, 7);
-
     }
 
     /**
      * This method sends the needed HTTP header and statuscode (401) to force
      * authentication.
-     *
-     * @return void
      */
-    function requireLogin() {
-
-        $this->response->addHeader('WWW-Authenticate', 'Bearer realm="' . $this->realm . '"');
+    public function requireLogin()
+    {
+        $this->response->addHeader('WWW-Authenticate', 'Bearer realm="'.$this->realm.'"');
         $this->response->setStatus(401);
-
     }
-
 }
diff --git a/vendor/sabre/http/lib/Auth/Digest.php b/vendor/sabre/http/lib/Auth/Digest.php
index 4b3f0746f..dd35a0b74 100644
--- a/vendor/sabre/http/lib/Auth/Digest.php
+++ b/vendor/sabre/http/lib/Auth/Digest.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP\Auth;
 
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 /**
- * HTTP Digest Authentication handler
+ * HTTP Digest Authentication handler.
  *
  * Use this class for easy http digest authentication.
  * Instructions:
@@ -27,10 +29,10 @@ use Sabre\HTTP\ResponseInterface;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Digest extends AbstractAuth {
-
+class Digest extends AbstractAuth
+{
     /**
-     * These constants are used in setQOP();
+     * These constants are used in setQOP();.
      */
     const QOP_AUTH = 1;
     const QOP_AUTHINT = 2;
@@ -42,28 +44,24 @@ class Digest extends AbstractAuth {
     protected $qop = self::QOP_AUTH;
 
     /**
-     * Initializes the object
+     * Initializes the object.
      */
-    function __construct($realm = 'SabreTooth', RequestInterface $request, ResponseInterface $response) {
-
+    public function __construct(string $realm = 'SabreTooth', RequestInterface $request, ResponseInterface $response)
+    {
         $this->nonce = uniqid();
         $this->opaque = md5($realm);
         parent::__construct($realm, $request, $response);
-
     }
 
     /**
-     * Gathers all information from the headers
+     * Gathers all information from the headers.
      *
      * This method needs to be called prior to anything else.
-     *
-     * @return void
      */
-    function init() {
-
+    public function init()
+    {
         $digest = $this->getDigest();
-        $this->digestParts = $this->parseDigest($digest);
-
+        $this->digestParts = $this->parseDigest((string) $digest);
     }
 
     /**
@@ -78,115 +76,101 @@ class Digest extends AbstractAuth {
      * QOP_AUTHINT ensures integrity of the request body, but this is not
      * supported by most HTTP clients. QOP_AUTHINT also requires the entire
      * request body to be md5'ed, which can put strains on CPU and memory.
-     *
-     * @param int $qop
-     * @return void
      */
-    function setQOP($qop) {
-
+    public function setQOP(int $qop)
+    {
         $this->qop = $qop;
-
     }
 
     /**
      * Validates the user.
      *
      * The A1 parameter should be md5($username . ':' . $realm . ':' . $password);
-     *
-     * @param string $A1
-     * @return bool
      */
-    function validateA1($A1) {
-
+    public function validateA1(string $A1): bool
+    {
         $this->A1 = $A1;
-        return $this->validate();
 
+        return $this->validate();
     }
 
     /**
      * Validates authentication through a password. The actual password must be provided here.
      * It is strongly recommended not store the password in plain-text and use validateA1 instead.
-     *
-     * @param string $password
-     * @return bool
      */
-    function validatePassword($password) {
+    public function validatePassword(string $password): bool
+    {
+        $this->A1 = md5($this->digestParts['username'].':'.$this->realm.':'.$password);
 
-        $this->A1 = md5($this->digestParts['username'] . ':' . $this->realm . ':' . $password);
         return $this->validate();
-
     }
 
     /**
-     * Returns the username for the request
+     * Returns the username for the request.
+     * Returns null if there were none.
      *
-     * @return string
+     * @return string|null
      */
-    function getUsername() {
-
-        return $this->digestParts['username'];
-
+    public function getUsername()
+    {
+        return $this->digestParts['username'] ?? null;
     }
 
     /**
-     * Validates the digest challenge
-     *
-     * @return bool
+     * Validates the digest challenge.
      */
-    protected function validate() {
+    protected function validate(): bool
+    {
+        if (!is_array($this->digestParts)) {
+            return false;
+        }
 
-        $A2 = $this->request->getMethod() . ':' . $this->digestParts['uri'];
+        $A2 = $this->request->getMethod().':'.$this->digestParts['uri'];
 
-        if ($this->digestParts['qop'] == 'auth-int') {
+        if ('auth-int' === $this->digestParts['qop']) {
             // Making sure we support this qop value
-            if (!($this->qop & self::QOP_AUTHINT)) return false;
+            if (!($this->qop & self::QOP_AUTHINT)) {
+                return false;
+            }
             // We need to add an md5 of the entire request body to the A2 part of the hash
             $body = $this->request->getBody($asString = true);
             $this->request->setBody($body);
-            $A2 .= ':' . md5($body);
-        } else {
-
-            // We need to make sure we support this qop value
-            if (!($this->qop & self::QOP_AUTH)) return false;
+            $A2 .= ':'.md5($body);
+        } elseif (!($this->qop & self::QOP_AUTH)) {
+            return false;
         }
 
         $A2 = md5($A2);
 
         $validResponse = md5("{$this->A1}:{$this->digestParts['nonce']}:{$this->digestParts['nc']}:{$this->digestParts['cnonce']}:{$this->digestParts['qop']}:{$A2}");
 
-        return $this->digestParts['response'] == $validResponse;
-
-
+        return $this->digestParts['response'] === $validResponse;
     }
 
     /**
-     * Returns an HTTP 401 header, forcing login
+     * Returns an HTTP 401 header, forcing login.
      *
      * This should be called when username and password are incorrect, or not supplied at all
-     *
-     * @return void
      */
-    function requireLogin() {
-
+    public function requireLogin()
+    {
         $qop = '';
         switch ($this->qop) {
-            case self::QOP_AUTH    :
+            case self::QOP_AUTH:
                 $qop = 'auth';
                 break;
-            case self::QOP_AUTHINT :
+            case self::QOP_AUTHINT:
                 $qop = 'auth-int';
                 break;
-            case self::QOP_AUTH | self::QOP_AUTHINT :
+            case self::QOP_AUTH | self::QOP_AUTHINT:
                 $qop = 'auth,auth-int';
                 break;
         }
 
-        $this->response->addHeader('WWW-Authenticate', 'Digest realm="' . $this->realm . '",qop="' . $qop . '",nonce="' . $this->nonce . '",opaque="' . $this->opaque . '"');
+        $this->response->addHeader('WWW-Authenticate', 'Digest realm="'.$this->realm.'",qop="'.$qop.'",nonce="'.$this->nonce.'",opaque="'.$this->opaque.'"');
         $this->response->setStatus(401);
-
     }
 
-
     /**
      * This method returns the full digest string.
      *
@@ -196,23 +180,20 @@ class Digest extends AbstractAuth {
      *
      * @return mixed
      */
-    function getDigest() {
-
+    public function getDigest()
+    {
         return $this->request->getHeader('Authorization');
-
     }
 
-
     /**
      * Parses the different pieces of the digest string into an array.
      *
      * This method returns false if an incomplete digest was supplied
      *
-     * @param string $digest
-     * @return mixed
+     * @return bool|array
      */
-    protected function parseDigest($digest) {
-
+    protected function parseDigest(string $digest)
+    {
         // protect against missing data
         $needed_parts = ['nonce' => 1, 'nc' => 1, 'cnonce' => 1, 'qop' => 1, 'username' => 1, 'uri' => 1, 'response' => 1];
         $data = [];
@@ -220,12 +201,10 @@ class Digest extends AbstractAuth {
         preg_match_all('@(\w+)=(?:(?:")([^"]+)"|([^\s,$]+))@', $digest, $matches, PREG_SET_ORDER);
 
         foreach ($matches as $m) {
-            $data[$m[1]] = $m[2] ? $m[2] : $m[3];
+            $data[$m[1]] = $m[2] ?: $m[3];
             unset($needed_parts[$m[1]]);
         }
 
         return $needed_parts ? false : $data;
-
     }
-
 }
diff --git a/vendor/sabre/http/lib/Client.php b/vendor/sabre/http/lib/Client.php
index 0810c4a25..48862e7da 100644
--- a/vendor/sabre/http/lib/Client.php
+++ b/vendor/sabre/http/lib/Client.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 use Sabre\Event\EventEmitter;
@@ -41,10 +43,10 @@ use Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Client extends EventEmitter {
-
+class Client extends EventEmitter
+{
     /**
-     * List of curl settings
+     * List of curl settings.
      *
      * @var array
      */
@@ -64,53 +66,61 @@ class Client extends EventEmitter {
      */
     protected $maxRedirects = 5;
 
+    protected $headerLinesMap = [];
+
     /**
      * Initializes the client.
-     *
-     * @return void
      */
-    function __construct() {
+    public function __construct()
+    {
+        // See https://github.com/sabre-io/http/pull/115#discussion_r241292068
+        // Preserve compatibility for sub-classes that implements their own method `parseCurlResult`
+        $separatedHeaders = __CLASS__ === get_class($this);
 
         $this->curlSettings = [
             CURLOPT_RETURNTRANSFER => true,
-            CURLOPT_HEADER         => true,
-            CURLOPT_NOBODY         => false,
-            CURLOPT_USERAGENT      => 'sabre-http/' . Version::VERSION . ' (http://sabre.io/)',
+            CURLOPT_NOBODY => false,
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
         ];
+        if ($separatedHeaders) {
+            $this->curlSettings[CURLOPT_HEADERFUNCTION] = [$this, 'receiveCurlHeader'];
+        } else {
+            $this->curlSettings[CURLOPT_HEADER] = true;
+        }
+    }
+
+    protected function receiveCurlHeader($curlHandle, $headerLine)
+    {
+        $this->headerLinesMap[(int) $curlHandle][] = $headerLine;
 
+        return strlen($headerLine);
     }
 
     /**
      * Sends a request to a HTTP server, and returns a response.
-     *
-     * @param RequestInterface $request
-     * @return ResponseInterface
      */
-    function send(RequestInterface $request) {
-
+    public function send(RequestInterface $request): ResponseInterface
+    {
         $this->emit('beforeRequest', [$request]);
 
         $retryCount = 0;
         $redirects = 0;
 
         do {
-
             $doRedirect = false;
             $retry = false;
 
             try {
-
                 $response = $this->doRequest($request);
 
-                $code = (int)$response->getStatus();
+                $code = $response->getStatus();
 
                 // We are doing in-PHP redirects, because curl's
                 // FOLLOW_LOCATION throws errors when PHP is configured with
                 // open_basedir.
                 //
                 // https://github.com/fruux/sabre-http/issues/12
-                if (in_array($code, [301, 302, 307, 308]) && $redirects < $this->maxRedirects) {
-
+                if ($redirects < $this->maxRedirects && in_array($code, [301, 302, 307, 308])) {
                     $oldLocation = $request->getUrl();
 
                     // Creating a new instance of the request object.
@@ -123,20 +133,15 @@ class Client extends EventEmitter {
                     ));
 
                     $doRedirect = true;
-                    $redirects++;
-
+                    ++$redirects;
                 }
 
                 // This was a HTTP error
                 if ($code >= 400) {
-
                     $this->emit('error', [$request, $response, &$retry, $retryCount]);
-                    $this->emit('error:' . $code, [$request, $response, &$retry, $retryCount]);
-
+                    $this->emit('error:'.$code, [$request, $response, &$retry, $retryCount]);
                 }
-
             } catch (ClientException $e) {
-
                 $this->emit('exception', [$request, $e, &$retry, $retryCount]);
 
                 // If retry was still set to false, it means no event handler
@@ -145,13 +150,11 @@ class Client extends EventEmitter {
                 if (!$retry) {
                     throw $e;
                 }
-
             }
 
             if ($retry) {
-                $retryCount++;
+                ++$retryCount;
             }
-
         } while ($retry || $doRedirect);
 
         $this->emit('afterRequest', [$request, $response]);
@@ -161,7 +164,6 @@ class Client extends EventEmitter {
         }
 
         return $response;
-
     }
 
     /**
@@ -172,32 +174,23 @@ class Client extends EventEmitter {
      *
      * After calling sendAsync, you must therefore occasionally call the poll()
      * method, or wait().
-     *
-     * @param RequestInterface $request
-     * @param callable $success
-     * @param callable $error
-     * @return void
      */
-    function sendAsync(RequestInterface $request, callable $success = null, callable $error = null) {
-
+    public function sendAsync(RequestInterface $request, callable $success = null, callable $error = null)
+    {
         $this->emit('beforeRequest', [$request]);
         $this->sendAsyncInternal($request, $success, $error);
         $this->poll();
-
     }
 
-
     /**
      * This method checks if any http requests have gotten results, and if so,
      * call the appropriate success or error handlers.
      *
      * This method will return true if there are still requests waiting to
      * return, and false if all the work is done.
-     *
-     * @return bool
      */
-    function poll() {
-
+    public function poll(): bool
+    {
         // nothing to do?
         if (!$this->curlMultiMap) {
             return false;
@@ -208,10 +201,10 @@ class Client extends EventEmitter {
                 $this->curlMultiHandle,
                 $stillRunning
             );
-        } while ($r === CURLM_CALL_MULTI_PERFORM);
+        } while (CURLM_CALL_MULTI_PERFORM === $r);
 
+        $messagesInQueue = 0;
         do {
-
             messageQueue:
 
             $status = curl_multi_info_read(
@@ -219,26 +212,25 @@ class Client extends EventEmitter {
                 $messagesInQueue
             );
 
-            if ($status && $status['msg'] === CURLMSG_DONE) {
-
-                $resourceId = intval($status['handle']);
+            if ($status && CURLMSG_DONE === $status['msg']) {
+                $resourceId = (int) $status['handle'];
                 list(
                     $request,
                     $successCallback,
                     $errorCallback,
-                    $retryCount,
-                ) = $this->curlMultiMap[$resourceId];
+                    $retryCount) = $this->curlMultiMap[$resourceId];
                 unset($this->curlMultiMap[$resourceId]);
-                $curlResult = $this->parseCurlResult(curl_multi_getcontent($status['handle']), $status['handle']);
-                $retry = false;
 
-                if ($curlResult['status'] === self::STATUS_CURLERROR) {
+                $curlHandle = $status['handle'];
+                $curlResult = $this->parseResponse(curl_multi_getcontent($curlHandle), $curlHandle);
+                $retry = false;
 
+                if (self::STATUS_CURLERROR === $curlResult['status']) {
                     $e = new ClientException($curlResult['curl_errmsg'], $curlResult['curl_errno']);
                     $this->emit('exception', [$request, $e, &$retry, $retryCount]);
 
                     if ($retry) {
-                        $retryCount++;
+                        ++$retryCount;
                         $this->sendAsyncInternal($request, $successCallback, $errorCallback, $retryCount);
                         goto messageQueue;
                     }
@@ -248,18 +240,14 @@ class Client extends EventEmitter {
                     if ($errorCallback) {
                         $errorCallback($curlResult);
                     }
-
-                } elseif ($curlResult['status'] === self::STATUS_HTTPERROR) {
-
+                } elseif (self::STATUS_HTTPERROR === $curlResult['status']) {
                     $this->emit('error', [$request, $curlResult['response'], &$retry, $retryCount]);
-                    $this->emit('error:' . $curlResult['http_code'], [$request, $curlResult['response'], &$retry, $retryCount]);
+                    $this->emit('error:'.$curlResult['http_code'], [$request, $curlResult['response'], &$retry, $retryCount]);
 
                     if ($retry) {
-
-                        $retryCount++;
+                        ++$retryCount;
                         $this->sendAsyncInternal($request, $successCallback, $errorCallback, $retryCount);
                         goto messageQueue;
-
                     }
 
                     $curlResult['request'] = $request;
@@ -267,37 +255,29 @@ class Client extends EventEmitter {
                     if ($errorCallback) {
                         $errorCallback($curlResult);
                     }
-
                 } else {
-
                     $this->emit('afterRequest', [$request, $curlResult['response']]);
 
                     if ($successCallback) {
                         $successCallback($curlResult['response']);
                     }
-
                 }
             }
-
         } while ($messagesInQueue > 0);
 
         return count($this->curlMultiMap) > 0;
-
     }
 
     /**
      * Processes every HTTP request in the queue, and waits till they are all
      * completed.
-     *
-     * @return void
      */
-    function wait() {
-
+    public function wait()
+    {
         do {
             curl_multi_select($this->curlMultiHandle);
             $stillRunning = $this->poll();
         } while ($stillRunning);
-
     }
 
     /**
@@ -309,14 +289,10 @@ class Client extends EventEmitter {
      *
      * This only works for the send() method. Throwing exceptions for
      * sendAsync() is not supported.
-     *
-     * @param bool $throwExceptions
-     * @return void
      */
-    function setThrowExceptions($throwExceptions) {
-
+    public function setThrowExceptions(bool $throwExceptions)
+    {
         $this->throwExceptions = $throwExceptions;
-
     }
 
     /**
@@ -324,40 +300,34 @@ class Client extends EventEmitter {
      *
      * These settings will be included in every HTTP request.
      *
-     * @param int $name
      * @param mixed $value
-     * @return void
      */
-    function addCurlSetting($name, $value) {
-
+    public function addCurlSetting(int $name, $value)
+    {
         $this->curlSettings[$name] = $value;
-
     }
 
     /**
      * This method is responsible for performing a single request.
-     *
-     * @param RequestInterface $request
-     * @return ResponseInterface
      */
-    protected function doRequest(RequestInterface $request) {
-
+    protected function doRequest(RequestInterface $request): ResponseInterface
+    {
         $settings = $this->createCurlSettingsArray($request);
 
         if (!$this->curlHandle) {
             $this->curlHandle = curl_init();
+        } else {
+            curl_reset($this->curlHandle);
         }
 
         curl_setopt_array($this->curlHandle, $settings);
         $response = $this->curlExec($this->curlHandle);
-        $response = $this->parseCurlResult($response, $this->curlHandle);
-
-        if ($response['status'] === self::STATUS_CURLERROR) {
+        $response = $this->parseResponse($response, $this->curlHandle);
+        if (self::STATUS_CURLERROR === $response['status']) {
             throw new ClientException($response['curl_errmsg'], $response['curl_errno']);
         }
 
         return $response['response'];
-
     }
 
     /**
@@ -389,28 +359,21 @@ class Client extends EventEmitter {
 
     /**
      * Turns a RequestInterface object into an array with settings that can be
-     * fed to curl_setopt
-     *
-     * @param RequestInterface $request
-     * @return array
+     * fed to curl_setopt.
      */
-    protected function createCurlSettingsArray(RequestInterface $request) {
-
+    protected function createCurlSettingsArray(RequestInterface $request): array
+    {
         $settings = $this->curlSettings;
 
         switch ($request->getMethod()) {
-            case 'HEAD' :
+            case 'HEAD':
                 $settings[CURLOPT_NOBODY] = true;
                 $settings[CURLOPT_CUSTOMREQUEST] = 'HEAD';
-                $settings[CURLOPT_POSTFIELDS] = '';
-                $settings[CURLOPT_PUT] = false;
                 break;
-            case 'GET' :
+            case 'GET':
                 $settings[CURLOPT_CUSTOMREQUEST] = 'GET';
-                $settings[CURLOPT_POSTFIELDS] = '';
-                $settings[CURLOPT_PUT] = false;
                 break;
-            default :
+            default:
                 $body = $request->getBody();
                 if (is_resource($body)) {
                     // This needs to be set to PUT, regardless of the actual
@@ -422,20 +385,17 @@ class Client extends EventEmitter {
                     // For security we cast this to a string. If somehow an array could
                     // be passed here, it would be possible for an attacker to use @ to
                     // post local files.
-                    $settings[CURLOPT_POSTFIELDS] = (string)$body;
+                    $settings[CURLOPT_POSTFIELDS] = (string) $body;
                 }
                 $settings[CURLOPT_CUSTOMREQUEST] = $request->getMethod();
                 break;
-
         }
 
         $nHeaders = [];
         foreach ($request->getHeaders() as $key => $values) {
-
             foreach ($values as $value) {
-                $nHeaders[] = $key . ': ' . $value;
+                $nHeaders[] = $key.': '.$value;
             }
-
         }
         $settings[CURLOPT_HTTPHEADER] = $nHeaders;
         $settings[CURLOPT_URL] = $request->getUrl();
@@ -449,13 +409,32 @@ class Client extends EventEmitter {
         }
 
         return $settings;
-
     }
 
     const STATUS_SUCCESS = 0;
     const STATUS_CURLERROR = 1;
     const STATUS_HTTPERROR = 2;
 
+    private function parseResponse(string $response, $curlHandle): array
+    {
+        $settings = $this->curlSettings;
+        $separatedHeaders = isset($settings[CURLOPT_HEADERFUNCTION]) && (bool) $settings[CURLOPT_HEADERFUNCTION];
+
+        if ($separatedHeaders) {
+            $resourceId = (int) $curlHandle;
+            if (isset($this->headerLinesMap[$resourceId])) {
+                $headers = $this->headerLinesMap[$resourceId];
+            } else {
+                $headers = [];
+            }
+            $response = $this->parseCurlResponse($headers, $response, $curlHandle);
+        } else {
+            $response = $this->parseCurlResult($response, $curlHandle);
+        }
+
+        return $response;
+    }
+
     /**
      * Parses the result of a curl call in a format that's a bit more
      * convenient to work with.
@@ -471,12 +450,67 @@ class Client extends EventEmitter {
      *   * http_code - HTTP status code, as an int. Only set if Only set if
      *                 status is STATUS_SUCCESS, or STATUS_HTTPERROR
      *
-     * @param string $response
+     * @param array    $headerLines
+     * @param string   $body
      * @param resource $curlHandle
-     * @return Response
      */
-    protected function parseCurlResult($response, $curlHandle) {
+    protected function parseCurlResponse(array $headerLines, string $body, $curlHandle): array
+    {
+        list(
+            $curlInfo,
+            $curlErrNo,
+            $curlErrMsg
+        ) = $this->curlStuff($curlHandle);
 
+        if ($curlErrNo) {
+            return [
+                'status' => self::STATUS_CURLERROR,
+                'curl_errno' => $curlErrNo,
+                'curl_errmsg' => $curlErrMsg,
+            ];
+        }
+
+        $response = new Response();
+        $response->setStatus($curlInfo['http_code']);
+        $response->setBody($body);
+
+        foreach ($headerLines as $header) {
+            $parts = explode(':', $header, 2);
+            if (2 === count($parts)) {
+                $response->addHeader(trim($parts[0]), trim($parts[1]));
+            }
+        }
+
+        $httpCode = $response->getStatus();
+
+        return [
+            'status' => $httpCode >= 400 ? self::STATUS_HTTPERROR : self::STATUS_SUCCESS,
+            'response' => $response,
+            'http_code' => $httpCode,
+        ];
+    }
+
+    /**
+     * Parses the result of a curl call in a format that's a bit more
+     * convenient to work with.
+     *
+     * The method returns an array with the following elements:
+     *   * status - one of the 3 STATUS constants.
+     *   * curl_errno - A curl error number. Only set if status is
+     *                  STATUS_CURLERROR.
+     *   * curl_errmsg - A current error message. Only set if status is
+     *                   STATUS_CURLERROR.
+     *   * response - Response object. Only set if status is STATUS_SUCCESS, or
+     *                STATUS_HTTPERROR.
+     *   * http_code - HTTP status code, as an int. Only set if Only set if
+     *                 status is STATUS_SUCCESS, or STATUS_HTTPERROR
+     *
+     * @deprecated Use parseCurlResponse instead
+     *
+     * @param resource $curlHandle
+     */
+    protected function parseCurlResult(string $response, $curlHandle): array
+    {
         list(
             $curlInfo,
             $curlErrNo,
@@ -485,8 +519,8 @@ class Client extends EventEmitter {
 
         if ($curlErrNo) {
             return [
-                'status'      => self::STATUS_CURLERROR,
-                'curl_errno'  => $curlErrNo,
+                'status' => self::STATUS_CURLERROR,
+                'curl_errno' => $curlErrNo,
                 'curl_errmsg' => $curlErrMsg,
             ];
         }
@@ -495,7 +529,7 @@ class Client extends EventEmitter {
         // In the case of 204 No Content, strlen($response) == $curlInfo['header_size].
         // This will cause substr($response, $curlInfo['header_size']) return FALSE instead of NULL
         // An exception will be thrown when calling getBodyAsString then
-        $responseBody = substr($response, $curlInfo['header_size']) ?: null;
+        $responseBody = substr($response, $curlInfo['header_size']) ?: '';
 
         unset($response);
 
@@ -510,26 +544,7 @@ class Client extends EventEmitter {
         // Splitting headers
         $headerBlob = explode("\r\n", $headerBlob);
 
-        $response = new Response();
-        $response->setStatus($curlInfo['http_code']);
-
-        foreach ($headerBlob as $header) {
-            $parts = explode(':', $header, 2);
-            if (count($parts) == 2) {
-                $response->addHeader(trim($parts[0]), trim($parts[1]));
-            }
-        }
-
-        $response->setBody($responseBody);
-
-        $httpCode = intval($response->getStatus());
-
-        return [
-            'status'    => $httpCode >= 400 ? self::STATUS_HTTPERROR : self::STATUS_SUCCESS,
-            'response'  => $response,
-            'http_code' => $httpCode,
-        ];
-
+        return $this->parseCurlResponse($headerBlob, $responseBody, $curlHandle);
     }
 
     /**
@@ -537,14 +552,9 @@ class Client extends EventEmitter {
      *
      * We keep this in a separate method, so we can call it without triggering
      * the beforeRequest event and don't do the poll().
-     *
-     * @param RequestInterface $request
-     * @param callable $success
-     * @param callable $error
-     * @param int $retryCount
      */
-    protected function sendAsyncInternal(RequestInterface $request, callable $success, callable $error, $retryCount = 0) {
-
+    protected function sendAsyncInternal(RequestInterface $request, callable $success, callable $error, int $retryCount = 0)
+    {
         if (!$this->curlMultiHandle) {
             $this->curlMultiHandle = curl_multi_init();
         }
@@ -554,29 +564,36 @@ class Client extends EventEmitter {
             $this->createCurlSettingsArray($request)
         );
         curl_multi_add_handle($this->curlMultiHandle, $curl);
-        $this->curlMultiMap[intval($curl)] = [
+
+        $resourceId = (int) $curl;
+        $this->headerLinesMap[$resourceId] = [];
+        $this->curlMultiMap[$resourceId] = [
             $request,
             $success,
             $error,
-            $retryCount
+            $retryCount,
         ];
-
     }
 
     // @codeCoverageIgnoreStart
 
     /**
-     * Calls curl_exec
+     * Calls curl_exec.
      *
      * This method exists so it can easily be overridden and mocked.
      *
      * @param resource $curlHandle
-     * @return string
      */
-    protected function curlExec($curlHandle) {
+    protected function curlExec($curlHandle): string
+    {
+        $this->headerLinesMap[(int) $curlHandle] = [];
 
-        return curl_exec($curlHandle);
+        $result = curl_exec($curlHandle);
+        if (false === $result) {
+            $result = '';
+        }
 
+        return $result;
     }
 
     /**
@@ -585,17 +602,15 @@ class Client extends EventEmitter {
      * This method exists so it can easily be overridden and mocked.
      *
      * @param resource $curlHandle
-     * @return array
      */
-    protected function curlStuff($curlHandle) {
-
+    protected function curlStuff($curlHandle): array
+    {
         return [
             curl_getinfo($curlHandle),
             curl_errno($curlHandle),
             curl_error($curlHandle),
         ];
-
     }
-    // @codeCoverageIgnoreEnd
 
+    // @codeCoverageIgnoreEnd
 }
diff --git a/vendor/sabre/http/lib/ClientException.php b/vendor/sabre/http/lib/ClientException.php
index 69631f44e..2ca4a28e0 100644
--- a/vendor/sabre/http/lib/ClientException.php
+++ b/vendor/sabre/http/lib/ClientException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -10,6 +12,6 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ClientException extends \Exception {
-
+class ClientException extends \Exception
+{
 }
diff --git a/vendor/sabre/http/lib/ClientHttpException.php b/vendor/sabre/http/lib/ClientHttpException.php
index 2923ef3b5..116ca1f79 100644
--- a/vendor/sabre/http/lib/ClientHttpException.php
+++ b/vendor/sabre/http/lib/ClientHttpException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -12,47 +14,37 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ClientHttpException extends \Exception implements HttpException {
-
+class ClientHttpException extends \Exception implements HttpException
+{
     /**
-     * Response object
+     * Response object.
      *
      * @var ResponseInterface
      */
     protected $response;
 
     /**
-     * Constructor
-     *
-     * @param ResponseInterface $response
+     * Constructor.
      */
-    function __construct(ResponseInterface $response) {
-
+    public function __construct(ResponseInterface $response)
+    {
         $this->response = $response;
         parent::__construct($response->getStatusText(), $response->getStatus());
-
     }
 
     /**
      * The http status code for the error.
-     *
-     * @return int
      */
-    function getHttpStatus() {
-
+    public function getHttpStatus(): int
+    {
         return $this->response->getStatus();
-
     }
 
     /**
      * Returns the full response object.
-     *
-     * @return ResponseInterface
      */
-    function getResponse() {
-
+    public function getResponse(): ResponseInterface
+    {
         return $this->response;
-
     }
-
 }
diff --git a/vendor/sabre/http/lib/HttpException.php b/vendor/sabre/http/lib/HttpException.php
index 1303dec97..80b3ae665 100644
--- a/vendor/sabre/http/lib/HttpException.php
+++ b/vendor/sabre/http/lib/HttpException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -15,8 +17,8 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface HttpException {
-
+interface HttpException
+{
     /**
      * The http status code for the error.
      *
@@ -25,6 +27,5 @@ interface HttpException {
      *
      * @return string|null
      */
-    function getHttpStatus();
-
+    public function getHttpStatus();
 }
diff --git a/vendor/sabre/http/lib/Message.php b/vendor/sabre/http/lib/Message.php
index 45bd18398..fc34f8d7f 100644
--- a/vendor/sabre/http/lib/Message.php
+++ b/vendor/sabre/http/lib/Message.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -11,26 +13,26 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Message implements MessageInterface {
-
+abstract class Message implements MessageInterface
+{
     /**
-     * Request body
+     * Request body.
      *
-     * This should be a stream resource
+     * This should be a stream resource, string or a callback writing the body to php://output
      *
-     * @var resource
+     * @var resource|string|callable
      */
     protected $body;
 
     /**
-     * Contains the list of HTTP headers
+     * Contains the list of HTTP headers.
      *
      * @var array
      */
     protected $headers = [];
 
     /**
-     * HTTP message version (1.0 or 1.1)
+     * HTTP message version (1.0, 1.1 or 2.0).
      *
      * @var string
      */
@@ -44,17 +46,21 @@ abstract class Message implements MessageInterface {
      *
      * @return resource
      */
-    function getBodyAsStream() {
-
+    public function getBodyAsStream()
+    {
         $body = $this->getBody();
-        if (is_string($body) || is_null($body)) {
+        if (is_callable($this->body)) {
+            $body = $this->getBodyAsString();
+        }
+        if (is_string($body) || null === $body) {
             $stream = fopen('php://temp', 'r+');
-            fwrite($stream, $body);
+            fwrite($stream, (string) $body);
             rewind($stream);
+
             return $stream;
         }
-        return $body;
 
+        return $body;
     }
 
     /**
@@ -62,77 +68,76 @@ abstract class Message implements MessageInterface {
      *
      * Note that because the underlying data may be based on a stream, this
      * method could only work correctly the first time.
-     *
-     * @return string
      */
-    function getBodyAsString() {
-
+    public function getBodyAsString(): string
+    {
         $body = $this->getBody();
         if (is_string($body)) {
             return $body;
         }
-        if (is_null($body)) {
+        if (null === $body) {
             return '';
         }
+        if (is_callable($body)) {
+            ob_start();
+            $body();
+
+            return ob_get_clean();
+        }
+        /**
+         * @var string|int|null
+         */
         $contentLength = $this->getHeader('Content-Length');
         if (is_int($contentLength) || ctype_digit($contentLength)) {
-            return stream_get_contents($body, $contentLength);
-        } else {
-            return stream_get_contents($body);
+            return stream_get_contents($body, (int) $contentLength);
         }
+
+        return stream_get_contents($body);
     }
 
     /**
      * Returns the message body, as it's internal representation.
      *
-     * This could be either a string or a stream.
+     * This could be either a string, a stream or a callback writing the body to php://output.
      *
-     * @return resource|string
+     * @return resource|string|callable
      */
-    function getBody() {
-
+    public function getBody()
+    {
         return $this->body;
-
     }
 
     /**
-     * Replaces the body resource with a new stream or string.
+     * Replaces the body resource with a new stream, string or a callback writing the body to php://output.
      *
-     * @param resource|string $body
+     * @param resource|string|callable $body
      */
-    function setBody($body) {
-
+    public function setBody($body)
+    {
         $this->body = $body;
-
     }
 
     /**
      * Returns all the HTTP headers as an array.
      *
      * Every header is returned as an array, with one or more values.
-     *
-     * @return array
      */
-    function getHeaders() {
-
+    public function getHeaders(): array
+    {
         $result = [];
         foreach ($this->headers as $headerInfo) {
             $result[$headerInfo[0]] = $headerInfo[1];
         }
-        return $result;
 
+        return $result;
     }
 
     /**
      * Will return true or false, depending on if a HTTP header exists.
-     *
-     * @param string $name
-     * @return bool
      */
-    function hasHeader($name) {
-
+    public function hasHeader(string $name): bool
+    {
         return isset($this->headers[strtolower($name)]);
-
     }
 
     /**
@@ -148,18 +153,17 @@ abstract class Message implements MessageInterface {
      * `Set-Cookie` cannot be logically combined with a comma. In those cases
      * you *should* use getHeaderAsArray().
      *
-     * @param string $name
      * @return string|null
      */
-    function getHeader($name) {
-
+    public function getHeader(string $name)
+    {
         $name = strtolower($name);
 
         if (isset($this->headers[$name])) {
             return implode(',', $this->headers[$name][1]);
         }
-        return null;
 
+        return null;
     }
 
     /**
@@ -170,11 +174,10 @@ abstract class Message implements MessageInterface {
      *
      * If the header did not exists, this method will return an empty array.
      *
-     * @param string $name
      * @return string[]
      */
-    function getHeaderAsArray($name) {
-
+    public function getHeaderAsArray(string $name): array
+    {
         $name = strtolower($name);
 
         if (isset($this->headers[$name])) {
@@ -182,7 +185,6 @@ abstract class Message implements MessageInterface {
         }
 
         return [];
-
     }
 
     /**
@@ -192,14 +194,11 @@ abstract class Message implements MessageInterface {
      *
      * If the header already existed, it will be overwritten.
      *
-     * @param string $name
      * @param string|string[] $value
-     * @return void
      */
-    function setHeader($name, $value) {
-
-        $this->headers[strtolower($name)] = [$name, (array)$value];
-
+    public function setHeader(string $name, $value)
+    {
+        $this->headers[strtolower($name)] = [$name, (array) $value];
     }
 
     /**
@@ -209,16 +208,12 @@ abstract class Message implements MessageInterface {
      * should be specified as either a string or an array.
      *
      * Any header that already existed will be overwritten.
-     *
-     * @param array $headers
-     * @return void
      */
-    function setHeaders(array $headers) {
-
+    public function setHeaders(array $headers)
+    {
         foreach ($headers as $name => $value) {
             $this->setHeader($name, $value);
         }
-
     }
 
     /**
@@ -228,77 +223,62 @@ abstract class Message implements MessageInterface {
      * another value. Individual values can be retrieved with
      * getHeadersAsArray.
      *
-     * @param string $name
-     * @param string $value
-     * @return void
+     * @param string|string[] $value
      */
-    function addHeader($name, $value) {
-
+    public function addHeader(string $name, $value)
+    {
         $lName = strtolower($name);
         if (isset($this->headers[$lName])) {
             $this->headers[$lName][1] = array_merge(
                 $this->headers[$lName][1],
-                (array)$value
+                (array) $value
             );
         } else {
             $this->headers[$lName] = [
                 $name,
-                (array)$value
+                (array) $value,
             ];
         }
-
     }
 
     /**
      * Adds a new set of HTTP headers.
      *
      * Any existing headers will not be overwritten.
-     *
-     * @param array $headers
-     * @return void
      */
-    function addHeaders(array $headers) {
-
+    public function addHeaders(array $headers)
+    {
         foreach ($headers as $name => $value) {
             $this->addHeader($name, $value);
         }
-
     }
 
-
     /**
      * Removes a HTTP header.
      *
      * The specified header name must be treated as case-insensitive.
      * This method should return true if the header was successfully deleted,
      * and false if the header did not exist.
-     *
-     * @param string $name
-     * @return bool
      */
-    function removeHeader($name) {
-
+    public function removeHeader(string $name): bool
+    {
         $name = strtolower($name);
         if (!isset($this->headers[$name])) {
             return false;
         }
         unset($this->headers[$name]);
-        return true;
 
+        return true;
     }
 
     /**
      * Sets the HTTP version.
      *
-     * Should be 1.0 or 1.1.
-     *
-     * @param string $version
-     * @return void
+     * Should be 1.0, 1.1 or 2.0.
      */
-    function setHttpVersion($version) {
-
+    public function setHttpVersion(string $version)
+    {
         $this->httpVersion = $version;
-
     }
 
     /**
@@ -306,9 +286,8 @@ abstract class Message implements MessageInterface {
      *
      * @return string
      */
-    function getHttpVersion() {
-
+    public function getHttpVersion(): string
+    {
         return $this->httpVersion;
-
     }
 }
diff --git a/vendor/sabre/http/lib/MessageDecoratorTrait.php b/vendor/sabre/http/lib/MessageDecoratorTrait.php
index 1cb32da22..d5504ac78 100644
--- a/vendor/sabre/http/lib/MessageDecoratorTrait.php
+++ b/vendor/sabre/http/lib/MessageDecoratorTrait.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -13,8 +15,8 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-trait MessageDecoratorTrait {
-
+trait MessageDecoratorTrait
+{
     /**
      * The inner request object.
      *
@@ -32,10 +34,9 @@ trait MessageDecoratorTrait {
      *
      * @return resource
      */
-    function getBodyAsStream() {
-
+    public function getBodyAsStream()
+    {
         return $this->inner->getBodyAsStream();
-
     }
 
     /**
@@ -43,13 +44,10 @@ trait MessageDecoratorTrait {
      *
      * Note that because the underlying data may be based on a stream, this
      * method could only work correctly the first time.
-     *
-     * @return string
      */
-    function getBodyAsString() {
-
+    public function getBodyAsString(): string
+    {
         return $this->inner->getBodyAsString();
-
     }
 
     /**
@@ -59,47 +57,37 @@ trait MessageDecoratorTrait {
      *
      * @return resource|string
      */
-    function getBody() {
-
+    public function getBody()
+    {
         return $this->inner->getBody();
-
     }
 
     /**
      * Updates the body resource with a new stream.
      *
-     * @param resource $body
-     * @return void
+     * @param resource|string|callable $body
      */
-    function setBody($body) {
-
+    public function setBody($body)
+    {
         $this->inner->setBody($body);
-
     }
 
     /**
      * Returns all the HTTP headers as an array.
      *
      * Every header is returned as an array, with one or more values.
-     *
-     * @return array
      */
-    function getHeaders() {
-
+    public function getHeaders(): array
+    {
         return $this->inner->getHeaders();
-
     }
 
     /**
      * Will return true or false, depending on if a HTTP header exists.
-     *
-     * @param string $name
-     * @return bool
      */
-    function hasHeader($name) {
-
+    public function hasHeader(string $name): bool
+    {
         return $this->inner->hasHeader($name);
-
     }
 
     /**
@@ -115,13 +103,11 @@ trait MessageDecoratorTrait {
      * `Set-Cookie` cannot be logically combined with a comma. In those cases
      * you *should* use getHeaderAsArray().
      *
-     * @param string $name
      * @return string|null
      */
-    function getHeader($name) {
-
+    public function getHeader(string $name)
+    {
         return $this->inner->getHeader($name);
-
     }
 
     /**
@@ -131,14 +117,10 @@ trait MessageDecoratorTrait {
      * item will appear in the array.
      *
      * If the header did not exists, this method will return an empty array.
-     *
-     * @param string $name
-     * @return string[]
      */
-    function getHeaderAsArray($name) {
-
+    public function getHeaderAsArray(string $name): array
+    {
         return $this->inner->getHeaderAsArray($name);
-
     }
 
     /**
@@ -148,14 +130,11 @@ trait MessageDecoratorTrait {
      *
      * If the header already existed, it will be overwritten.
      *
-     * @param string $name
      * @param string|string[] $value
-     * @return void
      */
-    function setHeader($name, $value) {
-
+    public function setHeader(string $name, $value)
+    {
         $this->inner->setHeader($name, $value);
-
     }
 
     /**
@@ -165,14 +144,10 @@ trait MessageDecoratorTrait {
      * should be specified as either a string or an array.
      *
      * Any header that already existed will be overwritten.
-     *
-     * @param array $headers
-     * @return void
      */
-    function setHeaders(array $headers) {
-
+    public function setHeaders(array $headers)
+    {
         $this->inner->setHeaders($headers);
-
     }
 
     /**
@@ -182,31 +157,23 @@ trait MessageDecoratorTrait {
      * another value. Individual values can be retrieved with
      * getHeadersAsArray.
      *
-     * @param string $name
-     * @param string $value
-     * @return void
+     * @param string|string[] $value
      */
-    function addHeader($name, $value) {
-
+    public function addHeader(string $name, $value)
+    {
         $this->inner->addHeader($name, $value);
-
     }
 
     /**
      * Adds a new set of HTTP headers.
      *
      * Any existing headers will not be overwritten.
-     *
-     * @param array $headers
-     * @return void
      */
-    function addHeaders(array $headers) {
-
+    public function addHeaders(array $headers)
+    {
         $this->inner->addHeaders($headers);
-
     }
 
-
     /**
      * Removes a HTTP header.
      *
@@ -214,38 +181,28 @@ trait MessageDecoratorTrait {
      * This method should return true if the header was successfully deleted,
      * and false if the header did not exist.
      *
-     * @param string $name
      * @return bool
      */
-    function removeHeader($name) {
-
+    public function removeHeader(string $name): bool
+    {
         return $this->inner->removeHeader($name);
-
     }
 
     /**
      * Sets the HTTP version.
      *
-     * Should be 1.0 or 1.1.
-     *
-     * @param string $version
-     * @return void
+     * Should be 1.0, 1.1 or 2.0.
      */
-    function setHttpVersion($version) {
-
+    public function setHttpVersion(string $version)
+    {
         $this->inner->setHttpVersion($version);
-
     }
 
     /**
      * Returns the HTTP version.
-     *
-     * @return string
      */
-    function getHttpVersion() {
-
+    public function getHttpVersion(): string
+    {
         return $this->inner->getHttpVersion();
-
     }
-
 }
diff --git a/vendor/sabre/http/lib/MessageInterface.php b/vendor/sabre/http/lib/MessageInterface.php
index df55beb2f..8070845d9 100644
--- a/vendor/sabre/http/lib/MessageInterface.php
+++ b/vendor/sabre/http/lib/MessageInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -10,8 +12,8 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface MessageInterface {
-
+interface MessageInterface
+{
     /**
      * Returns the body as a readable stream resource.
      *
@@ -20,7 +22,7 @@ interface MessageInterface {
      *
      * @return resource
      */
-    function getBodyAsStream();
+    public function getBodyAsStream();
 
     /**
      * Returns the body as a string.
@@ -30,41 +32,35 @@ interface MessageInterface {
      *
      * @return string
      */
-    function getBodyAsString();
+    public function getBodyAsString(): string;
 
     /**
      * Returns the message body, as it's internal representation.
      *
-     * This could be either a string or a stream.
+     * This could be either a string, a stream or a callback writing the body to php://output
      *
-     * @return resource|string
+     * @return resource|string|callable
      */
-    function getBody();
+    public function getBody();
 
     /**
      * Updates the body resource with a new stream.
      *
-     * @param resource|string $body
-     * @return void
+     * @param resource|string|callable $body
      */
-    function setBody($body);
+    public function setBody($body);
 
     /**
      * Returns all the HTTP headers as an array.
      *
      * Every header is returned as an array, with one or more values.
-     *
-     * @return array
      */
-    function getHeaders();
+    public function getHeaders(): array;
 
     /**
      * Will return true or false, depending on if a HTTP header exists.
-     *
-     * @param string $name
-     * @return bool
      */
-    function hasHeader($name);
+    public function hasHeader(string $name): bool;
 
     /**
      * Returns a specific HTTP header, based on it's name.
@@ -79,10 +75,9 @@ interface MessageInterface {
      * `Set-Cookie` cannot be logically combined with a comma. In those cases
      * you *should* use getHeaderAsArray().
      *
-     * @param string $name
      * @return string|null
      */
-    function getHeader($name);
+    public function getHeader(string $name);
 
     /**
      * Returns a HTTP header as an array.
@@ -92,10 +87,9 @@ interface MessageInterface {
      *
      * If the header did not exists, this method will return an empty array.
      *
-     * @param string $name
      * @return string[]
      */
-    function getHeaderAsArray($name);
+    public function getHeaderAsArray(string $name): array;
 
     /**
      * Updates a HTTP header.
@@ -104,11 +98,9 @@ interface MessageInterface {
      *
      * If the header already existed, it will be overwritten.
      *
-     * @param string $name
      * @param string|string[] $value
-     * @return void
      */
-    function setHeader($name, $value);
+    public function setHeader(string $name, $value);
 
     /**
      * Sets a new set of HTTP headers.
@@ -117,11 +109,8 @@ interface MessageInterface {
      * should be specified as either a string or an array.
      *
      * Any header that already existed will be overwritten.
-     *
-     * @param array $headers
-     * @return void
      */
-    function setHeaders(array $headers);
+    public function setHeaders(array $headers);
 
     /**
      * Adds a HTTP header.
@@ -130,21 +119,16 @@ interface MessageInterface {
      * another value. Individual values can be retrieved with
      * getHeadersAsArray.
      *
-     * @param string $name
-     * @param string $value
-     * @return void
+     * @param string|string[] $value
      */
-    function addHeader($name, $value);
+    public function addHeader(string $name, $value);
 
     /**
      * Adds a new set of HTTP headers.
      *
      * Any existing headers will not be overwritten.
-     *
-     * @param array $headers
-     * @return void
      */
-    function addHeaders(array $headers);
+    public function addHeaders(array $headers);
 
     /**
      * Removes a HTTP header.
@@ -152,27 +136,18 @@ interface MessageInterface {
      * The specified header name must be treated as case-insenstive.
      * This method should return true if the header was successfully deleted,
      * and false if the header did not exist.
-     *
-     * @param string $name
-     * @return bool
      */
-    function removeHeader($name);
+    public function removeHeader(string $name): bool;
 
     /**
      * Sets the HTTP version.
      *
-     * Should be 1.0 or 1.1.
-     *
-     * @param string $version
-     * @return void
+     * Should be 1.0, 1.1 or 2.0.
      */
-    function setHttpVersion($version);
+    public function setHttpVersion(string $version);
 
     /**
      * Returns the HTTP version.
-     *
-     * @return string
      */
-    function getHttpVersion();
-
+    public function getHttpVersion(): string;
 }
diff --git a/vendor/sabre/http/lib/Request.php b/vendor/sabre/http/lib/Request.php
index dfa3d5b48..496629a5b 100644
--- a/vendor/sabre/http/lib/Request.php
+++ b/vendor/sabre/http/lib/Request.php
@@ -1,8 +1,10 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
-use InvalidArgumentException;
+use LogicException;
 use Sabre\Uri;
 
 /**
@@ -15,132 +17,111 @@ use Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Request extends Message implements RequestInterface {
-
+class Request extends Message implements RequestInterface
+{
     /**
-     * HTTP Method
+     * HTTP Method.
      *
      * @var string
      */
     protected $method;
 
     /**
-     * Request Url
+     * Request Url.
      *
      * @var string
      */
     protected $url;
 
     /**
-     * Creates the request object
+     * Creates the request object.
      *
-     * @param string $method
-     * @param string $url
-     * @param array $headers
-     * @param resource $body
+     * @param resource|callable|string $body
      */
-    function __construct($method = null, $url = null, array $headers = null, $body = null) {
-
-        if (is_array($method)) {
-            throw new InvalidArgumentException('The first argument for this constructor should be a string or null, not an array. Did you upgrade from sabre/http 1.0 to 2.0?');
-        }
-        if (!is_null($method))      $this->setMethod($method);
-        if (!is_null($url))         $this->setUrl($url);
-        if (!is_null($headers))     $this->setHeaders($headers);
-        if (!is_null($body))        $this->setBody($body);
-
+    public function __construct(string $method, string $url, array $headers = [], $body = null)
+    {
+        $this->setMethod($method);
+        $this->setUrl($url);
+        $this->setHeaders($headers);
+        $this->setBody($body);
     }
 
     /**
-     * Returns the current HTTP method
-     *
-     * @return string
+     * Returns the current HTTP method.
      */
-    function getMethod() {
-
+    public function getMethod(): string
+    {
         return $this->method;
-
     }
 
     /**
-     * Sets the HTTP method
-     *
-     * @param string $method
-     * @return void
+     * Sets the HTTP method.
      */
-    function setMethod($method) {
-
+    public function setMethod(string $method)
+    {
         $this->method = $method;
-
     }
 
     /**
      * Returns the request url.
-     *
-     * @return string
      */
-    function getUrl() {
-
+    public function getUrl(): string
+    {
         return $this->url;
-
     }
 
     /**
      * Sets the request url.
-     *
-     * @param string $url
-     * @return void
      */
-    function setUrl($url) {
-
+    public function setUrl(string $url)
+    {
         $this->url = $url;
-
     }
 
     /**
      * Returns the list of query parameters.
      *
      * This is equivalent to PHP's $_GET superglobal.
-     *
-     * @return array
      */
-    function getQueryParameters() {
-
+    public function getQueryParameters(): array
+    {
         $url = $this->getUrl();
-        if (($index = strpos($url, '?')) === false) {
+        if (false === ($index = strpos($url, '?'))) {
             return [];
-        } else {
-            parse_str(substr($url, $index + 1), $queryParams);
-            return $queryParams;
         }
 
+        parse_str(substr($url, $index + 1), $queryParams);
+
+        return $queryParams;
     }
 
+    protected $absoluteUrl;
+
     /**
      * Sets the absolute url.
-     *
-     * @param string $url
-     * @return void
      */
-    function setAbsoluteUrl($url) {
-
+    public function setAbsoluteUrl(string $url)
+    {
         $this->absoluteUrl = $url;
-
     }
 
     /**
      * Returns the absolute url.
-     *
-     * @return string
      */
-    function getAbsoluteUrl() {
+    public function getAbsoluteUrl(): string
+    {
+        if (!$this->absoluteUrl) {
+            // Guessing we're a http endpoint.
+            $this->absoluteUrl = 'http://'.
+                ($this->getHeader('Host') ?? 'localhost').
+                $this->getUrl();
+        }
 
         return $this->absoluteUrl;
-
     }
 
     /**
-     * Base url
+     * Base url.
      *
      * @var string
      */
@@ -150,25 +131,18 @@ class Request extends Message implements RequestInterface {
      * Sets a base url.
      *
      * This url is used for relative path calculations.
-     *
-     * @param string $url
-     * @return void
      */
-    function setBaseUrl($url) {
-
+    public function setBaseUrl(string $url)
+    {
         $this->baseUrl = $url;
-
     }
 
     /**
      * Returns the current base url.
-     *
-     * @return string
      */
-    function getBaseUrl() {
-
+    public function getBaseUrl(): string
+    {
         return $this->baseUrl;
-
     }
 
     /**
@@ -185,33 +159,29 @@ class Request extends Message implements RequestInterface {
      * ISO-8859-1, it will convert it to UTF-8.
      *
      * If the path is outside of the base url, a LogicException will be thrown.
-     *
-     * @return string
      */
-    function getPath() {
-
+    public function getPath(): string
+    {
         // Removing duplicated slashes.
         $uri = str_replace('//', '/', $this->getUrl());
 
         $uri = Uri\normalize($uri);
         $baseUri = Uri\normalize($this->getBaseUrl());
 
-        if (strpos($uri, $baseUri) === 0) {
-
+        if (0 === strpos($uri, $baseUri)) {
             // We're not interested in the query part (everything after the ?).
             list($uri) = explode('?', $uri);
-            return trim(URLUtil::decodePath(substr($uri, strlen($baseUri))), '/');
 
+            return trim(decodePath(substr($uri, strlen($baseUri))), '/');
         }
-        // A special case, if the baseUri was accessed without a trailing
-        // slash, we'll accept it as well.
-        elseif ($uri . '/' === $baseUri) {
 
+        if ($uri.'/' === $baseUri) {
             return '';
-
         }
+        // A special case, if the baseUri was accessed without a trailing
+        // slash, we'll accept it as well.
 
-        throw new \LogicException('Requested uri (' . $this->getUrl() . ') is out of base uri (' . $this->getBaseUrl() . ')');
+        throw new \LogicException('Requested uri ('.$this->getUrl().') is out of base uri ('.$this->getBaseUrl().')');
     }
 
     /**
@@ -228,27 +198,20 @@ class Request extends Message implements RequestInterface {
      *
      * This would not have been needed, if POST data was accessible as
      * php://input, but unfortunately we need to special case it.
-     *
-     * @param array $postData
-     * @return void
      */
-    function setPostData(array $postData) {
-
+    public function setPostData(array $postData)
+    {
         $this->postData = $postData;
-
     }
 
     /**
      * Returns the POST data.
      *
      * This is equivalent to PHP's $_POST superglobal.
-     *
-     * @return array
      */
-    function getPostData() {
-
+    public function getPostData(): array
+    {
         return $this->postData;
-
     }
 
     /**
@@ -263,54 +226,42 @@ class Request extends Message implements RequestInterface {
      *
      * If the value does not exist in the array, null is returned.
      *
-     * @param string $valueName
      * @return string|null
      */
-    function getRawServerValue($valueName) {
-
-        if (isset($this->rawServerData[$valueName])) {
-            return $this->rawServerData[$valueName];
-        }
-
+    public function getRawServerValue(string $valueName)
+    {
+        return $this->rawServerData[$valueName] ?? null;
     }
 
     /**
      * Sets the _SERVER array.
-     *
-     * @param array $data
-     * @return void
      */
-    function setRawServerData(array $data) {
-
+    public function setRawServerData(array $data)
+    {
         $this->rawServerData = $data;
-
     }
 
     /**
      * Serializes the request object as a string.
      *
      * This is useful for debugging purposes.
-     *
-     * @return string
      */
-    function __toString() {
-
-        $out = $this->getMethod() . ' ' . $this->getUrl() . ' HTTP/' . $this->getHTTPVersion() . "\r\n";
+    public function __toString(): string
+    {
+        $out = $this->getMethod().' '.$this->getUrl().' HTTP/'.$this->getHttpVersion()."\r\n";
 
         foreach ($this->getHeaders() as $key => $value) {
             foreach ($value as $v) {
-                if ($key === 'Authorization') {
+                if ('Authorization' === $key) {
                     list($v) = explode(' ', $v, 2);
                     $v .= ' REDACTED';
                 }
-                $out .= $key . ": " . $v . "\r\n";
+                $out .= $key.': '.$v."\r\n";
             }
         }
         $out .= "\r\n";
         $out .= $this->getBodyAsString();
 
         return $out;
-
     }
-
 }
diff --git a/vendor/sabre/http/lib/RequestDecorator.php b/vendor/sabre/http/lib/RequestDecorator.php
index 7ee3f6fc8..0ad24925f 100644
--- a/vendor/sabre/http/lib/RequestDecorator.php
+++ b/vendor/sabre/http/lib/RequestDecorator.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
- * Request Decorator
+ * Request Decorator.
  *
  * This helper class allows you to easily create decorators for the Request
  * object.
@@ -12,99 +14,72 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class RequestDecorator implements RequestInterface {
-
+class RequestDecorator implements RequestInterface
+{
     use MessageDecoratorTrait;
 
     /**
      * Constructor.
-     *
-     * @param RequestInterface $inner
      */
-    function __construct(RequestInterface $inner) {
-
+    public function __construct(RequestInterface $inner)
+    {
         $this->inner = $inner;
-
     }
 
     /**
-     * Returns the current HTTP method
-     *
-     * @return string
+     * Returns the current HTTP method.
      */
-    function getMethod() {
-
+    public function getMethod(): string
+    {
         return $this->inner->getMethod();
-
     }
 
     /**
-     * Sets the HTTP method
-     *
-     * @param string $method
-     * @return void
+     * Sets the HTTP method.
      */
-    function setMethod($method) {
-
+    public function setMethod(string $method)
+    {
         $this->inner->setMethod($method);
-
     }
 
     /**
      * Returns the request url.
-     *
-     * @return string
      */
-    function getUrl() {
-
+    public function getUrl(): string
+    {
         return $this->inner->getUrl();
-
     }
 
     /**
      * Sets the request url.
-     *
-     * @param string $url
-     * @return void
      */
-    function setUrl($url) {
-
+    public function setUrl(string $url)
+    {
         $this->inner->setUrl($url);
-
     }
 
     /**
      * Returns the absolute url.
-     *
-     * @return string
      */
-    function getAbsoluteUrl() {
-
+    public function getAbsoluteUrl(): string
+    {
         return $this->inner->getAbsoluteUrl();
-
     }
 
     /**
      * Sets the absolute url.
-     *
-     * @param string $url
-     * @return void
      */
-    function setAbsoluteUrl($url) {
-
+    public function setAbsoluteUrl(string $url)
+    {
         $this->inner->setAbsoluteUrl($url);
-
     }
 
     /**
      * Returns the current base url.
-     *
-     * @return string
      */
-    function getBaseUrl() {
-
+    public function getBaseUrl(): string
+    {
         return $this->inner->getBaseUrl();
-
     }
 
     /**
@@ -113,14 +88,10 @@ class RequestDecorator implements RequestInterface {
      * This url is used for relative path calculations.
      *
      * The base url should default to /
-     *
-     * @param string $url
-     * @return void
      */
-    function setBaseUrl($url) {
-
+    public function setBaseUrl(string $url)
+    {
         $this->inner->setBaseUrl($url);
-
     }
 
     /**
@@ -137,39 +108,30 @@ class RequestDecorator implements RequestInterface {
      * ISO-8859-1, it will convert it to UTF-8.
      *
      * If the path is outside of the base url, a LogicException will be thrown.
-     *
-     * @return string
      */
-    function getPath() {
-
+    public function getPath(): string
+    {
         return $this->inner->getPath();
-
     }
 
     /**
      * Returns the list of query parameters.
      *
      * This is equivalent to PHP's $_GET superglobal.
-     *
-     * @return array
      */
-    function getQueryParameters() {
-
+    public function getQueryParameters(): array
+    {
         return $this->inner->getQueryParameters();
-
     }
 
     /**
      * Returns the POST data.
      *
      * This is equivalent to PHP's $_POST superglobal.
-     *
-     * @return array
      */
-    function getPostData() {
-
+    public function getPostData(): array
+    {
         return $this->inner->getPostData();
-
     }
 
     /**
@@ -179,53 +141,39 @@ class RequestDecorator implements RequestInterface {
      *
      * This would not have been needed, if POST data was accessible as
      * php://input, but unfortunately we need to special case it.
-     *
-     * @param array $postData
-     * @return void
      */
-    function setPostData(array $postData) {
-
+    public function setPostData(array $postData)
+    {
         $this->inner->setPostData($postData);
-
     }
 
-
     /**
      * Returns an item from the _SERVER array.
      *
      * If the value does not exist in the array, null is returned.
      *
-     * @param string $valueName
      * @return string|null
      */
-    function getRawServerValue($valueName) {
-
+    public function getRawServerValue(string $valueName)
+    {
         return $this->inner->getRawServerValue($valueName);
-
     }
 
     /**
      * Sets the _SERVER array.
-     *
-     * @param array $data
-     * @return void
      */
-    function setRawServerData(array $data) {
-
+    public function setRawServerData(array $data)
+    {
         $this->inner->setRawServerData($data);
-
     }
 
     /**
      * Serializes the request object as a string.
      *
      * This is useful for debugging purposes.
-     *
-     * @return string
      */
-    function __toString() {
-
+    public function __toString(): string
+    {
         return $this->inner->__toString();
-
     }
 }
diff --git a/vendor/sabre/http/lib/RequestInterface.php b/vendor/sabre/http/lib/RequestInterface.php
index 63d9cbb51..83fa85bdc 100644
--- a/vendor/sabre/http/lib/RequestInterface.php
+++ b/vendor/sabre/http/lib/RequestInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -9,59 +11,42 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface RequestInterface extends MessageInterface {
-
+interface RequestInterface extends MessageInterface
+{
     /**
-     * Returns the current HTTP method
-     *
-     * @return string
+     * Returns the current HTTP method.
      */
-    function getMethod();
+    public function getMethod(): string;
 
     /**
-     * Sets the HTTP method
-     *
-     * @param string $method
-     * @return void
+     * Sets the HTTP method.
      */
-    function setMethod($method);
+    public function setMethod(string $method);
 
     /**
      * Returns the request url.
-     *
-     * @return string
      */
-    function getUrl();
+    public function getUrl(): string;
 
     /**
      * Sets the request url.
-     *
-     * @param string $url
-     * @return void
      */
-    function setUrl($url);
+    public function setUrl(string $url);
 
     /**
      * Returns the absolute url.
-     *
-     * @return string
      */
-    function getAbsoluteUrl();
+    public function getAbsoluteUrl(): string;
 
     /**
      * Sets the absolute url.
-     *
-     * @param string $url
-     * @return void
      */
-    function setAbsoluteUrl($url);
+    public function setAbsoluteUrl(string $url);
 
     /**
      * Returns the current base url.
-     *
-     * @return string
      */
-    function getBaseUrl();
+    public function getBaseUrl(): string;
 
     /**
      * Sets a base url.
@@ -69,11 +54,8 @@ interface RequestInterface extends MessageInterface {
      * This url is used for relative path calculations.
      *
      * The base url should default to /
-     *
-     * @param string $url
-     * @return void
      */
-    function setBaseUrl($url);
+    public function setBaseUrl(string $url);
 
     /**
      * Returns the relative path.
@@ -89,28 +71,22 @@ interface RequestInterface extends MessageInterface {
      * ISO-8859-1, it will convert it to UTF-8.
      *
      * If the path is outside of the base url, a LogicException will be thrown.
-     *
-     * @return string
      */
-    function getPath();
+    public function getPath(): string;
 
     /**
      * Returns the list of query parameters.
      *
      * This is equivalent to PHP's $_GET superglobal.
-     *
-     * @return array
      */
-    function getQueryParameters();
+    public function getQueryParameters(): array;
 
     /**
      * Returns the POST data.
      *
      * This is equivalent to PHP's $_POST superglobal.
-     *
-     * @return array
      */
-    function getPostData();
+    public function getPostData(): array;
 
     /**
      * Sets the post data.
@@ -119,29 +95,20 @@ interface RequestInterface extends MessageInterface {
      *
      * This would not have been needed, if POST data was accessible as
      * php://input, but unfortunately we need to special case it.
-     *
-     * @param array $postData
-     * @return void
      */
-    function setPostData(array $postData);
+    public function setPostData(array $postData);
 
     /**
      * Returns an item from the _SERVER array.
      *
      * If the value does not exist in the array, null is returned.
      *
-     * @param string $valueName
      * @return string|null
      */
-    function getRawServerValue($valueName);
+    public function getRawServerValue(string $valueName);
 
     /**
      * Sets the _SERVER array.
-     *
-     * @param array $data
-     * @return void
      */
-    function setRawServerData(array $data);
-
-
+    public function setRawServerData(array $data);
 }
diff --git a/vendor/sabre/http/lib/Response.php b/vendor/sabre/http/lib/Response.php
index 01920d8d9..64dfbc0b2 100644
--- a/vendor/sabre/http/lib/Response.php
+++ b/vendor/sabre/http/lib/Response.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -9,14 +11,14 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Response extends Message implements ResponseInterface {
-
+class Response extends Message implements ResponseInterface
+{
     /**
      * This is the list of currently registered HTTP status codes.
      *
      * @var array
      */
-    static $statusCodes = [
+    public static $statusCodes = [
         100 => 'Continue',
         101 => 'Switching Protocols',
         102 => 'Processing',
@@ -81,57 +83,55 @@ class Response extends Message implements ResponseInterface {
     ];
 
     /**
-     * HTTP status code
+     * HTTP status code.
      *
      * @var int
      */
     protected $status;
 
     /**
-     * HTTP status text
+     * HTTP status text.
      *
      * @var string
      */
     protected $statusText;
 
     /**
-     * Creates the response object
+     * Creates the response object.
      *
      * @param string|int $status
-     * @param array $headers
-     * @param resource $body
+     * @param array      $headers
+     * @param resource   $body
      */
-    function __construct($status = null, array $headers = null, $body = null) {
-
-        if (!is_null($status)) $this->setStatus($status);
-        if (!is_null($headers)) $this->setHeaders($headers);
-        if (!is_null($body)) $this->setBody($body);
-
+    public function __construct($status = 500, array $headers = null, $body = null)
+    {
+        if (null !== $status) {
+            $this->setStatus($status);
+        }
+        if (null !== $headers) {
+            $this->setHeaders($headers);
+        }
+        if (null !== $body) {
+            $this->setBody($body);
+        }
     }
 
-
     /**
      * Returns the current HTTP status code.
-     *
-     * @return int
      */
-    function getStatus() {
-
+    public function getStatus(): int
+    {
         return $this->status;
-
     }
 
     /**
      * Returns the human-readable status string.
      *
      * In the case of a 200, this may for example be 'OK'.
-     *
-     * @return string
      */
-    function getStatusText() {
-
+    public function getStatusText(): string
+    {
         return $this->statusText;
-
     }
 
     /**
@@ -144,21 +144,20 @@ class Response extends Message implements ResponseInterface {
      * added.
      *
      * @param string|int $status
+     *
      * @throws \InvalidArgumentException
-     * @return void
      */
-    function setStatus($status) {
-
+    public function setStatus($status)
+    {
         if (ctype_digit($status) || is_int($status)) {
-
             $statusCode = $status;
-            $statusText = isset(self::$statusCodes[$status]) ? self::$statusCodes[$status] : 'Unknown';
-
+            $statusText = self::$statusCodes[$status] ?? 'Unknown';
         } else {
             list(
                 $statusCode,
                 $statusText
             ) = explode(' ', $status, 2);
+            $statusCode = (int) $statusCode;
         }
         if ($statusCode < 100 || $statusCode > 999) {
             throw new \InvalidArgumentException('The HTTP status code must be exactly 3 digits');
@@ -166,28 +165,24 @@ class Response extends Message implements ResponseInterface {
 
         $this->status = $statusCode;
         $this->statusText = $statusText;
-
     }
 
     /**
      * Serializes the response object as a string.
      *
      * This is useful for debugging purposes.
-     *
-     * @return string
      */
-    function __toString() {
-
-        $str = 'HTTP/' . $this->httpVersion . ' ' . $this->getStatus() . ' ' . $this->getStatusText() . "\r\n";
+    public function __toString(): string
+    {
+        $str = 'HTTP/'.$this->httpVersion.' '.$this->getStatus().' '.$this->getStatusText()."\r\n";
         foreach ($this->getHeaders() as $key => $value) {
             foreach ($value as $v) {
-                $str .= $key . ": " . $v . "\r\n";
+                $str .= $key.': '.$v."\r\n";
             }
         }
         $str .= "\r\n";
         $str .= $this->getBodyAsString();
-        return $str;
 
+        return $str;
     }
-
 }
diff --git a/vendor/sabre/http/lib/ResponseDecorator.php b/vendor/sabre/http/lib/ResponseDecorator.php
index db3a67507..289dba5cc 100644
--- a/vendor/sabre/http/lib/ResponseDecorator.php
+++ b/vendor/sabre/http/lib/ResponseDecorator.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
- * Response Decorator
+ * Response Decorator.
  *
  * This helper class allows you to easily create decorators for the Response
  * object.
@@ -12,45 +14,36 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ResponseDecorator implements ResponseInterface {
-
+class ResponseDecorator implements ResponseInterface
+{
     use MessageDecoratorTrait;
 
     /**
      * Constructor.
-     *
-     * @param ResponseInterface $inner
      */
-    function __construct(ResponseInterface $inner) {
-
+    public function __construct(ResponseInterface $inner)
+    {
         $this->inner = $inner;
-
     }
 
     /**
      * Returns the current HTTP status code.
-     *
-     * @return int
      */
-    function getStatus() {
-
+    public function getStatus(): int
+    {
         return $this->inner->getStatus();
-
     }
 
-
     /**
      * Returns the human-readable status string.
      *
      * In the case of a 200, this may for example be 'OK'.
-     *
-     * @return string
      */
-    function getStatusText() {
-
+    public function getStatusText(): string
+    {
         return $this->inner->getStatusText();
-
     }
+
     /**
      * Sets the HTTP status code.
      *
@@ -61,12 +54,10 @@ class ResponseDecorator implements ResponseInterface {
      * added.
      *
      * @param string|int $status
-     * @return void
      */
-    function setStatus($status) {
-
+    public function setStatus($status)
+    {
         $this->inner->setStatus($status);
-
     }
 
     /**
@@ -76,9 +67,8 @@ class ResponseDecorator implements ResponseInterface {
      *
      * @return string
      */
-    function __toString() {
-
+    public function __toString(): string
+    {
         return $this->inner->__toString();
-
     }
 }
diff --git a/vendor/sabre/http/lib/ResponseInterface.php b/vendor/sabre/http/lib/ResponseInterface.php
index 411cdc06c..9bd93f179 100644
--- a/vendor/sabre/http/lib/ResponseInterface.php
+++ b/vendor/sabre/http/lib/ResponseInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
@@ -9,23 +11,19 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ResponseInterface extends MessageInterface {
-
+interface ResponseInterface extends MessageInterface
+{
     /**
      * Returns the current HTTP status code.
-     *
-     * @return int
      */
-    function getStatus();
+    public function getStatus(): int;
 
     /**
      * Returns the human-readable status string.
      *
      * In the case of a 200, this may for example be 'OK'.
-     *
-     * @return string
      */
-    function getStatusText();
+    public function getStatusText(): string;
 
     /**
      * Sets the HTTP status code.
@@ -37,9 +35,8 @@ interface ResponseInterface extends MessageInterface {
      * added.
      *
      * @param string|int $status
+     *
      * @throws \InvalidArgumentException
-     * @return void
      */
-    function setStatus($status);
-
+    public function setStatus($status);
 }
diff --git a/vendor/sabre/http/lib/Sapi.php b/vendor/sabre/http/lib/Sapi.php
index 054380e73..80254f3f3 100644
--- a/vendor/sabre/http/lib/Sapi.php
+++ b/vendor/sabre/http/lib/Sapi.php
@@ -1,9 +1,13 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
+use InvalidArgumentException;
+
 /**
- * PHP SAPI
+ * PHP SAPI.
  *
  * This object is responsible for:
  * 1. Constructing a Request object based on the current HTTP request sent to
@@ -28,56 +32,85 @@ namespace Sabre\HTTP;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Sapi {
-
+class Sapi
+{
     /**
      * This static method will create a new Request object, based on the
      * current PHP request.
-     *
-     * @return Request
      */
-    static function getRequest() {
+    public static function getRequest(): Request
+    {
+        $serverArr = $_SERVER;
+
+        if ('cli' === PHP_SAPI) {
+            // If we're running off the CLI, we're going to set some default
+            // settings.
+            $serverArr['REQUEST_URI'] = $_SERVER['REQUEST_URI'] ?? '/';
+            $serverArr['REQUEST_METHOD'] = $_SERVER['REQUEST_METHOD'] ?? 'CLI';
+        }
 
-        $r = self::createFromServerArray($_SERVER);
+        $r = self::createFromServerArray($serverArr);
         $r->setBody(fopen('php://input', 'r'));
         $r->setPostData($_POST);
-        return $r;
 
+        return $r;
     }
 
     /**
      * Sends the HTTP response back to a HTTP client.
      *
      * This calls php's header() function and streams the body to php://output.
-     *
-     * @param ResponseInterface $response
-     * @return void
      */
-    static function sendResponse(ResponseInterface $response) {
-
-        header('HTTP/' . $response->getHttpVersion() . ' ' . $response->getStatus() . ' ' . $response->getStatusText());
+    public static function sendResponse(ResponseInterface $response)
+    {
+        header('HTTP/'.$response->getHttpVersion().' '.$response->getStatus().' '.$response->getStatusText());
         foreach ($response->getHeaders() as $key => $value) {
-
             foreach ($value as $k => $v) {
-                if ($k === 0) {
-                    header($key . ': ' . $v);
+                if (0 === $k) {
+                    header($key.': '.$v);
                 } else {
-                    header($key . ': ' . $v, false);
+                    header($key.': '.$v, false);
                 }
             }
-
         }
 
         $body = $response->getBody();
-        if (is_null($body)) return;
+        if (null === $body) {
+            return;
+        }
+
+        if (is_callable($body)) {
+            $body();
+
+            return;
+        }
 
         $contentLength = $response->getHeader('Content-Length');
-        if ($contentLength !== null) {
+        if (null !== $contentLength) {
             $output = fopen('php://output', 'wb');
-            if (is_resource($body) && get_resource_type($body) == 'stream') {
-                if (PHP_INT_SIZE !== 4){
+            if (is_resource($body) && 'stream' == get_resource_type($body)) {
+                if (PHP_INT_SIZE > 4) {
                     // use the dedicated function on 64 Bit systems
-                    stream_copy_to_stream($body, $output, $contentLength);
+                    // a workaround to make PHP more possible to use mmap based copy, see https://github.com/sabre-io/http/pull/119
+                    $left = (int) $contentLength;
+                    // copy with 4MiB chunks
+                    $chunk_size = 4 * 1024 * 1024;
+                    stream_set_chunk_size($output, $chunk_size);
+                    // If this is a partial response, flush the beginning bytes until the first position that is a multiple of the page size.
+                    $contentRange = $response->getHeader('Content-Range');
+                    // Matching "Content-Range: bytes 1234-5678/7890"
+                    if (null !== $contentRange && preg_match('/^bytes\s([0-9]*)-([0-9]*)\//i', $contentRange, $matches) && '' !== $matches[1]) {
+                        // 4kB should be the default page size on most architectures
+                        $pageSize = 4096;
+                        $offset = (int) $matches[1];
+                        $delta = ($offset % $pageSize) > 0 ? ($pageSize - $offset % $pageSize) : 0;
+                        if ($delta > 0) {
+                            $left -= stream_copy_to_stream($body, $output, min($delta, $left));
+                        }
+                    }
+                    while ($left > 0) {
+                        $left -= stream_copy_to_stream($body, $output, min($left, $chunk_size));
+                    }
                 } else {
                     // workaround for 32 Bit systems to avoid stream_copy_to_stream
                     while (!feof($body)) {
@@ -85,7 +118,7 @@ class Sapi {
                     }
                 }
             } else {
-                fwrite($output, $body, $contentLength);
+                fwrite($output, $body, (int) $contentLength);
             }
         } else {
             file_put_contents('php://output', $body);
@@ -94,18 +127,16 @@ class Sapi {
         if (is_resource($body)) {
             fclose($body);
         }
-
     }
 
     /**
      * This static method will create a new Request object, based on a PHP
      * $_SERVER array.
      *
-     * @param array $serverArray
-     * @return Request
+     * REQUEST_URI and REQUEST_METHOD are required.
      */
-    static function createFromServerArray(array $serverArray) {
-
+    public static function createFromServerArray(array $serverArray): Request
+    {
         $headers = [];
         $method = null;
         $url = null;
@@ -115,61 +146,61 @@ class Sapi {
         $hostName = 'localhost';
 
         foreach ($serverArray as $key => $value) {
-
             switch ($key) {
-
-                case 'SERVER_PROTOCOL' :
-                    if ($value === 'HTTP/1.0') {
+                case 'SERVER_PROTOCOL':
+                    if ('HTTP/1.0' === $value) {
                         $httpVersion = '1.0';
+                    } elseif ('HTTP/2.0' === $value) {
+                        $httpVersion = '2.0';
                     }
                     break;
-                case 'REQUEST_METHOD' :
+                case 'REQUEST_METHOD':
                     $method = $value;
                     break;
-                case 'REQUEST_URI' :
+                case 'REQUEST_URI':
                     $url = $value;
                     break;
 
                 // These sometimes show up without a HTTP_ prefix
-                case 'CONTENT_TYPE' :
+                case 'CONTENT_TYPE':
                     $headers['Content-Type'] = $value;
                     break;
-                case 'CONTENT_LENGTH' :
+                case 'CONTENT_LENGTH':
                     $headers['Content-Length'] = $value;
                     break;
 
                 // mod_php on apache will put credentials in these variables.
                 // (fast)cgi does not usually do this, however.
-                case 'PHP_AUTH_USER' :
+                case 'PHP_AUTH_USER':
                     if (isset($serverArray['PHP_AUTH_PW'])) {
-                        $headers['Authorization'] = 'Basic ' . base64_encode($value . ':' . $serverArray['PHP_AUTH_PW']);
+                        $headers['Authorization'] = 'Basic '.base64_encode($value.':'.$serverArray['PHP_AUTH_PW']);
                     }
                     break;
 
                 // Similarly, mod_php may also screw around with digest auth.
-                case 'PHP_AUTH_DIGEST' :
-                    $headers['Authorization'] = 'Digest ' . $value;
+                case 'PHP_AUTH_DIGEST':
+                    $headers['Authorization'] = 'Digest '.$value;
                     break;
 
                 // Apache may prefix the HTTP_AUTHORIZATION header with
                 // REDIRECT_, if mod_rewrite was used.
-                case 'REDIRECT_HTTP_AUTHORIZATION' :
+                case 'REDIRECT_HTTP_AUTHORIZATION':
                     $headers['Authorization'] = $value;
                     break;
 
-                case 'HTTP_HOST' :
+                case 'HTTP_HOST':
                     $hostName = $value;
                     $headers['Host'] = $value;
                     break;
 
-                case 'HTTPS' :
-                    if (!empty($value) && $value !== 'off') {
+                case 'HTTPS':
+                    if (!empty($value) && 'off' !== $value) {
                         $protocol = 'https';
                     }
                     break;
 
-                default :
-                    if (substr($key, 0, 5) === 'HTTP_') {
+                default:
+                    if ('HTTP_' === substr($key, 0, 5)) {
                         // It's a HTTP header
 
                         // Normalizing it to be prettier
@@ -182,21 +213,23 @@ class Sapi {
                         // Turning spaces into dashes.
                         $header = str_replace(' ', '-', $header);
                         $headers[$header] = $value;
-
                     }
                     break;
-
-
             }
+        }
 
+        if (null === $url) {
+            throw new InvalidArgumentException('The _SERVER array must have a REQUEST_URI key');
         }
 
+        if (null === $method) {
+            throw new InvalidArgumentException('The _SERVER array must have a REQUEST_METHOD key');
+        }
         $r = new Request($method, $url, $headers);
         $r->setHttpVersion($httpVersion);
         $r->setRawServerData($serverArray);
-        $r->setAbsoluteUrl($protocol . '://' . $hostName . $url);
-        return $r;
+        $r->setAbsoluteUrl($protocol.'://'.$hostName.$url);
 
+        return $r;
     }
-
 }
diff --git a/vendor/sabre/http/lib/URLUtil.php b/vendor/sabre/http/lib/URLUtil.php
deleted file mode 100644
index 85c0e1150..000000000
--- a/vendor/sabre/http/lib/URLUtil.php
+++ /dev/null
@@ -1,103 +0,0 @@
-<?php
-
-namespace Sabre\HTTP;
-
-use Sabre\URI;
-
-/**
- * URL utility class
- *
- * Note: this class is deprecated. All its functionality moved to functions.php
- * or sabre\uri.
- *
- * @deprecated
- * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class URLUtil {
-
-    /**
-     * Encodes the path of a url.
-     *
-     * slashes (/) are treated as path-separators.
-     *
-     * @deprecated use \Sabre\HTTP\encodePath()
-     * @param string $path
-     * @return string
-     */
-    static function encodePath($path) {
-
-        return encodePath($path);
-
-    }
-
-    /**
-     * Encodes a 1 segment of a path
-     *
-     * Slashes are considered part of the name, and are encoded as %2f
-     *
-     * @deprecated use \Sabre\HTTP\encodePathSegment()
-     * @param string $pathSegment
-     * @return string
-     */
-    static function encodePathSegment($pathSegment) {
-
-        return encodePathSegment($pathSegment);
-
-    }
-
-    /**
-     * Decodes a url-encoded path
-     *
-     * @deprecated use \Sabre\HTTP\decodePath
-     * @param string $path
-     * @return string
-     */
-    static function decodePath($path) {
-
-        return decodePath($path);
-
-    }
-
-    /**
-     * Decodes a url-encoded path segment
-     *
-     * @deprecated use \Sabre\HTTP\decodePathSegment()
-     * @param string $path
-     * @return string
-     */
-    static function decodePathSegment($path) {
-
-        return decodePathSegment($path);
-
-    }
-
-    /**
-     * Returns the 'dirname' and 'basename' for a path.
-     *
-     * @deprecated Use Sabre\Uri\split().
-     * @param string $path
-     * @return array
-     */
-    static function splitPath($path) {
-
-        return Uri\split($path);
-
-    }
-
-    /**
-     * Resolves relative urls, like a browser would.
-     *
-     * @deprecated Use Sabre\Uri\resolve().
-     * @param string $basePath
-     * @param string $newPath
-     * @return string
-     */
-    static function resolve($basePath, $newPath) {
-
-        return Uri\resolve($basePath, $newPath);
-
-    }
-
-}
diff --git a/vendor/sabre/http/lib/Util.php b/vendor/sabre/http/lib/Util.php
deleted file mode 100644
index e3f13a645..000000000
--- a/vendor/sabre/http/lib/Util.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-
-namespace Sabre\HTTP;
-
-/**
- * HTTP utility methods
- *
- * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
- * @author Evert Pot (http://evertpot.com/)
- * @author Paul Voegler
- * @deprecated All these functions moved to functions.php
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Util {
-
-    /**
-     * Content negotiation
-     *
-     * @deprecated Use \Sabre\HTTP\negotiateContentType
-     * @param string|null $acceptHeaderValue
-     * @param array $availableOptions
-     * @return string|null
-     */
-    static function negotiateContentType($acceptHeaderValue, array $availableOptions) {
-
-        return negotiateContentType($acceptHeaderValue, $availableOptions);
-
-    }
-
-    /**
-     * Deprecated! Use negotiateContentType.
-     *
-     * @deprecated Use \Sabre\HTTP\NegotiateContentType
-     * @param string|null $acceptHeaderValue
-     * @param array $availableOptions
-     * @return string|null
-     */
-    static function negotiate($acceptHeaderValue, array $availableOptions) {
-
-        return negotiateContentType($acceptHeaderValue, $availableOptions);
-
-    }
-
-    /**
-     * Parses a RFC2616-compatible date string
-     *
-     * This method returns false if the date is invalid
-     *
-     * @deprecated Use parseDate
-     * @param string $dateHeader
-     * @return bool|DateTime
-     */
-    static function parseHTTPDate($dateHeader) {
-
-        return parseDate($dateHeader);
-
-    }
-
-    /**
-     * Transforms a DateTime object to HTTP's most common date format.
-     *
-     * We're serializing it as the RFC 1123 date, which, for HTTP must be
-     * specified as GMT.
-     *
-     * @deprecated Use toDate
-     * @param \DateTime $dateTime
-     * @return string
-     */
-    static function toHTTPDate(\DateTime $dateTime) {
-
-        return toDate($dateTime);
-
-    }
-}
diff --git a/vendor/sabre/http/lib/Version.php b/vendor/sabre/http/lib/Version.php
index c40532ae8..20a401773 100644
--- a/vendor/sabre/http/lib/Version.php
+++ b/vendor/sabre/http/lib/Version.php
@@ -1,19 +1,20 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 /**
- * This class contains the version number for the HTTP package
+ * This class contains the version number for the HTTP package.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Version {
-
+class Version
+{
     /**
-     * Full version number
+     * Full version number.
      */
-    const VERSION = '4.2.4';
-
+    const VERSION = '5.0.4';
 }
diff --git a/vendor/sabre/http/lib/functions.php b/vendor/sabre/http/lib/functions.php
index d94119623..197a9e661 100644
--- a/vendor/sabre/http/lib/functions.php
+++ b/vendor/sabre/http/lib/functions.php
@@ -1,8 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\HTTP;
 
 use DateTime;
+use InvalidArgumentException;
 
 /**
  * A collection of useful helpers for parsing or generating various HTTP
@@ -27,61 +30,64 @@ use DateTime;
  *   http://tools.ietf.org/html/rfc7231#section-7.1.1.1
  *
  * @param string $dateString
+ *
  * @return bool|DateTime
  */
-function parseDate($dateString) {
-
+function parseDate(string $dateString)
+{
     // Only the format is checked, valid ranges are checked by strtotime below
     $month = '(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)';
     $weekday = '(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)';
     $wkday = '(Mon|Tue|Wed|Thu|Fri|Sat|Sun)';
     $time = '([0-1]\d|2[0-3])(\:[0-5]\d){2}';
-    $date3 = $month . ' ([12]\d|3[01]| [1-9])';
-    $date2 = '(0[1-9]|[12]\d|3[01])\-' . $month . '\-\d{2}';
+    $date3 = $month.' ([12]\d|3[01]| [1-9])';
+    $date2 = '(0[1-9]|[12]\d|3[01])\-'.$month.'\-\d{2}';
     // 4-digit year cannot begin with 0 - unix timestamp begins in 1970
-    $date1 = '(0[1-9]|[12]\d|3[01]) ' . $month . ' [1-9]\d{3}';
+    $date1 = '(0[1-9]|[12]\d|3[01]) '.$month.' [1-9]\d{3}';
 
     // ANSI C's asctime() format
     // 4-digit year cannot begin with 0 - unix timestamp begins in 1970
-    $asctime_date = $wkday . ' ' . $date3 . ' ' . $time . ' [1-9]\d{3}';
+    $asctime_date = $wkday.' '.$date3.' '.$time.' [1-9]\d{3}';
     // RFC 850, obsoleted by RFC 1036
-    $rfc850_date = $weekday . ', ' . $date2 . ' ' . $time . ' GMT';
+    $rfc850_date = $weekday.', '.$date2.' '.$time.' GMT';
     // RFC 822, updated by RFC 1123
-    $rfc1123_date = $wkday . ', ' . $date1 . ' ' . $time . ' GMT';
+    $rfc1123_date = $wkday.', '.$date1.' '.$time.' GMT';
     // allowed date formats by RFC 2616
     $HTTP_date = "($rfc1123_date|$rfc850_date|$asctime_date)";
 
     // allow for space around the string and strip it
     $dateString = trim($dateString, ' ');
-    if (!preg_match('/^' . $HTTP_date . '$/', $dateString))
+    if (!preg_match('/^'.$HTTP_date.'$/', $dateString)) {
         return false;
+    }
 
     // append implicit GMT timezone to ANSI C time format
-    if (strpos($dateString, ' GMT') === false)
+    if (false === strpos($dateString, ' GMT')) {
         $dateString .= ' GMT';
+    }
 
     try {
         return new DateTime($dateString, new \DateTimeZone('UTC'));
     } catch (\Exception $e) {
         return false;
     }
-
 }
 
 /**
- * Transforms a DateTime object to a valid HTTP/1.1 Date header value
+ * Transforms a DateTime object to a valid HTTP/1.1 Date header value.
  *
  * @param DateTime $dateTime
+ *
  * @return string
  */
-function toDate(DateTime $dateTime) {
-
+function toDate(DateTime $dateTime): string
+{
     // We need to clone it, as we don't want to affect the existing
     // DateTime.
     $dateTime = clone $dateTime;
     $dateTime->setTimezone(new \DateTimeZone('GMT'));
-    return $dateTime->format('D, d M Y H:i:s \G\M\T');
 
+    return $dateTime->format('D, d M Y H:i:s \G\M\T');
 }
 
 /**
@@ -101,11 +107,12 @@ function toDate(DateTime $dateTime) {
  * implying that no accept header was sent.
  *
  * @param string|null $acceptHeaderValue
- * @param array $availableOptions
+ * @param array       $availableOptions
+ *
  * @return string|null
  */
-function negotiateContentType($acceptHeaderValue, array $availableOptions) {
-
+function negotiateContentType($acceptHeaderValue, array $availableOptions)
+{
     if (!$acceptHeaderValue) {
         // Grabbing the first in the list.
         return reset($availableOptions);
@@ -130,9 +137,10 @@ function negotiateContentType($acceptHeaderValue, array $availableOptions) {
     $lastChoice = null;
 
     foreach ($proposals as $proposal) {
-
         // Ignoring broken values.
-        if (is_null($proposal)) continue;
+        if (null === $proposal) {
+            continue;
+        }
 
         // If the quality is lower we don't have to bother comparing.
         if ($proposal['quality'] < $lastQuality) {
@@ -140,12 +148,11 @@ function negotiateContentType($acceptHeaderValue, array $availableOptions) {
         }
 
         foreach ($options as $optionIndex => $option) {
-
-            if ($proposal['type'] !== '*' && $proposal['type'] !== $option['type']) {
+            if ('*' !== $proposal['type'] && $proposal['type'] !== $option['type']) {
                 // no match on type.
                 continue;
             }
-            if ($proposal['subType'] !== '*' && $proposal['subType'] !== $option['subType']) {
+            if ('*' !== $proposal['subType'] && $proposal['subType'] !== $option['subType']) {
                 // no match on subtype.
                 continue;
             }
@@ -165,31 +172,25 @@ function negotiateContentType($acceptHeaderValue, array $availableOptions) {
             // subtype. We need to calculate a score for how specific the
             // match was.
             $specificity =
-                ($proposal['type'] !== '*' ? 20 : 0) +
-                ($proposal['subType'] !== '*' ? 10 : 0) +
+                ('*' !== $proposal['type'] ? 20 : 0) +
+                ('*' !== $proposal['subType'] ? 10 : 0) +
                 count($option['parameters']);
 
-
             // Does this entry win?
             if (
                 ($proposal['quality'] > $lastQuality) ||
                 ($proposal['quality'] === $lastQuality && $specificity > $lastSpecificity) ||
                 ($proposal['quality'] === $lastQuality && $specificity === $lastSpecificity && $optionIndex < $lastOptionIndex)
             ) {
-
                 $lastQuality = $proposal['quality'];
                 $lastSpecificity = $specificity;
                 $lastOptionIndex = $optionIndex;
                 $lastChoice = $availableOptions[$optionIndex];
-
             }
-
         }
-
     }
 
     return $lastChoice;
-
 }
 
 /**
@@ -217,10 +218,11 @@ function negotiateContentType($acceptHeaderValue, array $availableOptions) {
  * uses them.
  *
  * @param string|string[] $input
+ *
  * @return array
  */
-function parsePrefer($input) {
-
+function parsePrefer($input): array
+{
     $token = '[!#$%&\'*+\-.^_`~A-Za-z0-9]+';
 
     // Work in progress
@@ -241,7 +243,6 @@ REGEX;
 
     $output = [];
     foreach (getHeaderValues($input) as $value) {
-
         if (!preg_match($regex, $value, $matches)) {
             // Ignore
             continue;
@@ -249,22 +250,22 @@ REGEX;
 
         // Mapping old values to their new counterparts
         switch ($matches['name']) {
-            case 'return-asynch' :
+            case 'return-asynch':
                 $output['respond-async'] = true;
                 break;
-            case 'return-representation' :
+            case 'return-representation':
                 $output['return'] = 'representation';
                 break;
-            case 'return-minimal' :
+            case 'return-minimal':
                 $output['return'] = 'minimal';
                 break;
-            case 'strict' :
+            case 'strict':
                 $output['handling'] = 'strict';
                 break;
-            case 'lenient' :
+            case 'lenient':
                 $output['handling'] = 'lenient';
                 break;
-            default :
+            default:
                 if (isset($matches['value'])) {
                     $value = trim($matches['value'], '"');
                 } else {
@@ -273,11 +274,9 @@ REGEX;
                 $output[strtolower($matches['name'])] = empty($value) ? true : $value;
                 break;
         }
-
     }
 
     return $output;
-
 }
 
 /**
@@ -296,25 +295,26 @@ REGEX;
  *
  * @param string|string[] $values
  * @param string|string[] $values2
- * @return string[]
  */
-function getHeaderValues($values, $values2 = null) {
-
-    $values = (array)$values;
+function getHeaderValues($values, $values2 = null): array
+{
+    $values = (array) $values;
     if ($values2) {
-        $values = array_merge($values, (array)$values2);
+        $values = array_merge($values, (array) $values2);
     }
+
+    $result = array();
     foreach ($values as $l1) {
         foreach (explode(',', $l1) as $l2) {
             $result[] = trim($l2);
         }
     }
-    return $result;
 
+    return $result;
 }
 
 /**
- * Parses a mime-type and splits it into:
+ * Parses a mime-type and splits it into:.
  *
  * 1. type
  * 2. subtype
@@ -322,10 +322,11 @@ function getHeaderValues($values, $values2 = null) {
  * 4. parameters
  *
  * @param string $str
+ *
  * @return array
  */
-function parseMimeType($str) {
-
+function parseMimeType(string $str): array
+{
     $parameters = [];
     // If no q= parameter appears, then quality = 1.
     $quality = 1;
@@ -333,17 +334,22 @@ function parseMimeType($str) {
     $parts = explode(';', $str);
 
     // The first part is the mime-type.
-    $mimeType = array_shift($parts);
+    $mimeType = trim(array_shift($parts));
+
+    if ('*' === $mimeType) {
+        $mimeType = '*/*';
+    }
 
-    $mimeType = explode('/', trim($mimeType));
-    if (count($mimeType) !== 2) {
+    $mimeType = explode('/', $mimeType);
+    if (2 !== count($mimeType)) {
         // Illegal value
-        return null;
+        var_dump($mimeType);
+        die();
+        throw new InvalidArgumentException('Not a valid mime-type: '.$str);
     }
     list($type, $subType) = $mimeType;
 
     foreach ($parts as $part) {
-
         $part = trim($part);
         if (strpos($part, '=')) {
             list($partName, $partValue) =
@@ -357,89 +363,66 @@ function parseMimeType($str) {
         // the parameter list. Anything after the q= counts as an
         // 'accept extension' and could introduce new semantics in
         // content-negotation.
-        if ($partName !== 'q') {
+        if ('q' !== $partName) {
             $parameters[$partName] = $part;
         } else {
-            $quality = (float)$partValue;
+            $quality = (float) $partValue;
             break; // Stop parsing parts
         }
-
     }
 
     return [
-        'type'       => $type,
-        'subType'    => $subType,
-        'quality'    => $quality,
+        'type' => $type,
+        'subType' => $subType,
+        'quality' => $quality,
         'parameters' => $parameters,
     ];
-
 }
 
 /**
  * Encodes the path of a url.
  *
  * slashes (/) are treated as path-separators.
- *
- * @param string $path
- * @return string
  */
-function encodePath($path) {
-
-    return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\)\/:@])/', function($match) {
-
-        return '%' . sprintf('%02x', ord($match[0]));
-
+function encodePath(string $path): string
+{
+    return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\)\/:@])/', function ($match) {
+        return '%'.sprintf('%02x', ord($match[0]));
     }, $path);
-
 }
 
 /**
- * Encodes a 1 segment of a path
+ * Encodes a 1 segment of a path.
  *
  * Slashes are considered part of the name, and are encoded as %2f
- *
- * @param string $pathSegment
- * @return string
  */
-function encodePathSegment($pathSegment) {
-
-    return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\):@])/', function($match) {
-
-        return '%' . sprintf('%02x', ord($match[0]));
-
+function encodePathSegment(string $pathSegment): string
+{
+    return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\):@])/', function ($match) {
+        return '%'.sprintf('%02x', ord($match[0]));
     }, $pathSegment);
 }
 
 /**
- * Decodes a url-encoded path
- *
- * @param string $path
- * @return string
+ * Decodes a url-encoded path.
  */
-function decodePath($path) {
-
+function decodePath(string $path): string
+{
     return decodePathSegment($path);
-
 }
 
 /**
- * Decodes a url-encoded path segment
- *
- * @param string $path
- * @return string
+ * Decodes a url-encoded path segment.
  */
-function decodePathSegment($path) {
-
+function decodePathSegment(string $path): string
+{
     $path = rawurldecode($path);
     $encoding = mb_detect_encoding($path, ['UTF-8', 'ISO-8859-1']);
 
     switch ($encoding) {
-
-        case 'ISO-8859-1' :
+        case 'ISO-8859-1':
             $path = utf8_encode($path);
-
     }
 
     return $path;
-
 }
diff --git a/vendor/sabre/http/phpstan.neon b/vendor/sabre/http/phpstan.neon
new file mode 100644
index 000000000..241663a72
--- /dev/null
+++ b/vendor/sabre/http/phpstan.neon
@@ -0,0 +1,3 @@
+parameters:
+  level: 1
+  bootstrap: %currentWorkingDirectory%/vendor/autoload.php
diff --git a/vendor/sabre/uri/.gitattributes b/vendor/sabre/uri/.gitattributes
new file mode 100644
index 000000000..d1618f3a1
--- /dev/null
+++ b/vendor/sabre/uri/.gitattributes
@@ -0,0 +1,4 @@
+/tests          export-ignore
+/.travis.yml    export-ignore
+/CHANGELOG.md   export-ignore
+/README.md      export-ignore
diff --git a/vendor/sabre/uri/.gitignore b/vendor/sabre/uri/.gitignore
index 19d1affd4..b6fc3f896 100644
--- a/vendor/sabre/uri/.gitignore
+++ b/vendor/sabre/uri/.gitignore
@@ -6,8 +6,10 @@ composer.lock
 tests/cov/
 
 # Composer binaries
-bin/phpunit
-bin/phpcs
+bin
 
 # Vim
 .*.swp
+
+# development stuff
+.php_cs.cache
diff --git a/vendor/sabre/uri/.php_cs.dist b/vendor/sabre/uri/.php_cs.dist
new file mode 100644
index 000000000..8d61ee259
--- /dev/null
+++ b/vendor/sabre/uri/.php_cs.dist
@@ -0,0 +1,12 @@
+<?php
+
+$config = PhpCsFixer\Config::create();
+$config->getFinder()
+    ->exclude('vendor')
+    ->in(__DIR__);
+$config->setRules([
+    '@PSR1' => true,
+    '@Symfony' =>true
+]);
+
+return $config;
\ No newline at end of file
diff --git a/vendor/sabre/uri/.travis.yml b/vendor/sabre/uri/.travis.yml
deleted file mode 100644
index 75c8270df..000000000
--- a/vendor/sabre/uri/.travis.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-language: php
-php:
-  - 5.4
-  - 5.5
-  - 5.6
-  - 7
-  - 7.1
-
-script:
-  - ./bin/phpunit --configuration tests/phpunit.xml.dist
-  - ./bin/sabre-cs-fixer fix lib/ --dry-run --diff
-
-before_script: composer install --dev
-
diff --git a/vendor/sabre/uri/CHANGELOG.md b/vendor/sabre/uri/CHANGELOG.md
deleted file mode 100644
index 92aaa7507..000000000
--- a/vendor/sabre/uri/CHANGELOG.md
+++ /dev/null
@@ -1,57 +0,0 @@
-ChangeLog
-=========
-
-1.2.1 (2017-02-20)
-------------------
-
-* #16: Correctly parse urls that are only a fragment `#`.
-
-
-1.2.0 (2016-12-06)
-------------------
-
-* Now throwing `InvalidUriException` if a uri passed to the `parse` function
-  is invalid or could not be parsed.
-* #11: Fix support for URIs that start with a triple slash. PHP's `parse_uri()`
-  doesn't support them, so we now have a pure-php fallback in case it fails.
-* #9: Fix support for relative URI's that have a non-uri encoded colon `:` in
-  them.
-
-
-1.1.1 (2016-10-27)
-------------------
-
-* #10: Correctly support file:// URIs in the build() method. (@yuloh)
-
-
-1.1.0 (2016-03-07)
-------------------
-
-* #6: PHP's `parse_url()` corrupts strings if they contain certain
-  non ascii-characters such as Chinese or Hebrew. sabre/uri's `parse()`
-  function now percent-encodes these characters beforehand.
-
-
-1.0.1 (2015-04-28)
-------------------
-
-* #4: Using php-cs-fixer to automatically enforce conding standards.
-* #5: Resolving to and building `mailto:` urls were not correctly handled.
-
-
-1.0.0 (2015-01-27)
-------------------
-
-* Added a `normalize` function.
-* Added a `buildUri` function.
-* Fixed a bug in the `resolve` when only a new fragment is specified.
-
-San José, CalConnect XXXII release!
-
-0.0.1 (2014-11-17)
-------------------
-
-* First version!
-* Source was lifted from sabre/http package.
-* Provides a `resolve` and a `split` function.
-* Requires PHP 5.4.8 and up.
diff --git a/vendor/sabre/uri/LICENSE b/vendor/sabre/uri/LICENSE
index 087996be7..ae2c99290 100644
--- a/vendor/sabre/uri/LICENSE
+++ b/vendor/sabre/uri/LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 2014-2017 fruux GmbH (https://fruux.com/)
+Copyright (C) 2014-2019 fruux GmbH (https://fruux.com/)
 
 All rights reserved.
 
diff --git a/vendor/sabre/uri/README.md b/vendor/sabre/uri/README.md
deleted file mode 100644
index aa21bfe06..000000000
--- a/vendor/sabre/uri/README.md
+++ /dev/null
@@ -1,47 +0,0 @@
-sabre/uri
-=========
-
-sabre/uri is a lightweight library that provides several functions for working
-with URIs, staying true to the rules of [RFC3986][2].
-
-Partially inspired by [Node.js URL library][3], and created to solve real
-problems in PHP applications. 100% unitested and many tests are based on
-examples from RFC3986.
-
-The library provides the following functions:
-
-1. `resolve` to resolve relative urls.
-2. `normalize` to aid in comparing urls.
-3. `parse`, which works like PHP's [parse_url][6].
-4. `build` to do the exact opposite of `parse`.
-5. `split` to easily get the 'dirname' and 'basename' of a URL without all the
-   problems those two functions have.
-
-
-Further reading
----------------
-
-* [Installation][7]
-* [Usage][8]
-
-
-Questions?
-----------
-
-Head over to the [sabre/dav mailinglist][4], or you can also just open a ticket
-on [GitHub][5].
-
-
-Made at fruux
--------------
-
-This library is being developed by [fruux](https://fruux.com/). Drop us a line for commercial services or enterprise support.
-
-[1]: http://sabre.io/uri/
-[2]: https://tools.ietf.org/html/rfc3986/
-[3]: http://nodejs.org/api/url.html
-[4]: http://groups.google.com/group/sabredav-discuss
-[5]: https://github.com/fruux/sabre-uri/issues/
-[6]: http://php.net/manual/en/function.parse-url.php
-[7]: http://sabre.io/uri/install/
-[8]: http://sabre.io/uri/usage/
diff --git a/vendor/sabre/uri/composer.json b/vendor/sabre/uri/composer.json
index 49d69e723..30f382937 100644
--- a/vendor/sabre/uri/composer.json
+++ b/vendor/sabre/uri/composer.json
@@ -9,7 +9,7 @@
     "homepage": "http://sabre.io/uri/",
     "license": "BSD-3-Clause",
     "require": {
-        "php": ">=5.4.7"
+        "php": ">=7"
     },
     "authors": [
         {
@@ -31,9 +31,13 @@
             "Sabre\\Uri\\" : "lib/"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Sabre\\Uri\\": "tests/"
+        }
+    },
     "require-dev": {
-        "sabre/cs": "~1.0.0",
-        "phpunit/phpunit" : ">=4.0,<6.0"
+        "phpunit/phpunit" : "^6"
     },
     "config" : {
         "bin-dir" : "bin/"
diff --git a/vendor/sabre/uri/lib/InvalidUriException.php b/vendor/sabre/uri/lib/InvalidUriException.php
index 0385fd462..7f37ca54e 100644
--- a/vendor/sabre/uri/lib/InvalidUriException.php
+++ b/vendor/sabre/uri/lib/InvalidUriException.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Uri;
 
 /**
- * Invalid Uri
+ * Invalid Uri.
  *
  * This is thrown when an attempt was made to use Sabre\Uri parse a uri that
  * it could not.
@@ -12,6 +14,6 @@ namespace Sabre\Uri;
  * @author Evert Pot (https://evertpot.com/)
  * @license http://sabre.io/license/
  */
-class InvalidUriException extends \Exception {
-
+class InvalidUriException extends \Exception
+{
 }
diff --git a/vendor/sabre/uri/lib/Version.php b/vendor/sabre/uri/lib/Version.php
index fa544538b..ad6c89867 100644
--- a/vendor/sabre/uri/lib/Version.php
+++ b/vendor/sabre/uri/lib/Version.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Uri;
 
 /**
@@ -9,11 +11,10 @@ namespace Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/
  */
-class Version {
-
+class Version
+{
     /**
-     * Full version number
+     * Full version number.
      */
-    const VERSION = '1.2.1';
-
+    const VERSION = '2.1.3';
 }
diff --git a/vendor/sabre/uri/lib/functions.php b/vendor/sabre/uri/lib/functions.php
index 39b4a6f08..161e684d7 100644
--- a/vendor/sabre/uri/lib/functions.php
+++ b/vendor/sabre/uri/lib/functions.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Uri;
 
 /**
@@ -18,30 +20,32 @@ namespace Sabre\Uri;
  *
  * @param string $basePath
  * @param string $newPath
+ *
  * @return string
+ *
+ * @throws InvalidUriException
  */
-function resolve($basePath, $newPath) {
-
-    $base = parse($basePath);
+function resolve(string $basePath, string $newPath): string
+{
     $delta = parse($newPath);
 
-    $pick = function($part) use ($base, $delta) {
+    // If the new path defines a scheme, it's absolute and we can just return
+    // that.
+    if ($delta['scheme']) {
+        return build($delta);
+    }
 
+    $base = parse($basePath);
+    $pick = function ($part) use ($base, $delta) {
         if ($delta[$part]) {
             return $delta[$part];
         } elseif ($base[$part]) {
             return $base[$part];
         }
-        return null;
 
+        return null;
     };
 
-    // If the new path defines a scheme, it's absolute and we can just return
-    // that.
-    if ($delta['scheme']) {
-        return build($delta);
-    }
-
     $newParts = [];
 
     $newParts['scheme'] = $pick('scheme');
@@ -49,17 +53,18 @@ function resolve($basePath, $newPath) {
     $newParts['port'] = $pick('port');
 
     $path = '';
-    if ($delta['path']) {
+    if (is_string($delta['path']) and strlen($delta['path']) > 0) {
         // If the path starts with a slash
-        if ($delta['path'][0] === '/') {
+        if ('/' === $delta['path'][0]) {
             $path = $delta['path'];
         } else {
             // Removing last component from base path.
             $path = $base['path'];
-            if (strpos($path, '/') !== false) {
-                $path = substr($path, 0, strrpos($path, '/'));
+            $length = strrpos((string) $path, '/');
+            if (false !== $length) {
+                $path = substr($path, 0, $length);
             }
-            $path .= '/' . $delta['path'];
+            $path .= '/'.$delta['path'];
         }
     } else {
         $path = $base['path'] ?: '/';
@@ -68,15 +73,14 @@ function resolve($basePath, $newPath) {
     $pathParts = explode('/', $path);
     $newPathParts = [];
     foreach ($pathParts as $pathPart) {
-
         switch ($pathPart) {
             //case '' :
-            case '.' :
+            case '.':
                 break;
-            case '..' :
+            case '..':
                 array_pop($newPathParts);
                 break;
-            default :
+            default:
                 $newPathParts[] = $pathPart;
                 break;
         }
@@ -95,8 +99,8 @@ function resolve($basePath, $newPath) {
     if ($delta['fragment']) {
         $newParts['fragment'] = $delta['fragment'];
     }
-    return build($newParts);
 
+    return build($newParts);
 }
 
 /**
@@ -109,10 +113,13 @@ function resolve($basePath, $newPath) {
  * It will also change a %3a into a %3A.
  *
  * @param string $uri
+ *
  * @return string
+ *
+ * @throws InvalidUriException
  */
-function normalize($uri) {
-
+function normalize(string $uri): string
+{
     $parts = parse($uri);
 
     if (!empty($parts['path'])) {
@@ -123,23 +130,23 @@ function normalize($uri) {
                 case '.':
                     // skip
                     break;
-                case '..' :
+                case '..':
                     // One level up in the hierarchy
                     array_pop($newPathParts);
                     break;
-                default :
+                default:
                     // Ensuring that everything is correctly percent-encoded.
                     $newPathParts[] = rawurlencode(rawurldecode($pathPart));
                     break;
             }
         }
-        $parts['path'] = '/' . implode('/', $newPathParts);
+        $parts['path'] = '/'.implode('/', $newPathParts);
     }
 
     if ($parts['scheme']) {
         $parts['scheme'] = strtolower($parts['scheme']);
         $defaultPorts = [
-            'http'  => '80',
+            'http' => '80',
             'https' => '443',
         ];
 
@@ -149,8 +156,8 @@ function normalize($uri) {
         }
         // A few HTTP specific rules.
         switch ($parts['scheme']) {
-            case 'http' :
-            case 'https' :
+            case 'http':
+            case 'https':
                 if (empty($parts['path'])) {
                     // An empty path is equivalent to / in http.
                     $parts['path'] = '/';
@@ -159,10 +166,11 @@ function normalize($uri) {
         }
     }
 
-    if ($parts['host']) $parts['host'] = strtolower($parts['host']);
+    if ($parts['host']) {
+        $parts['host'] = strtolower($parts['host']);
+    }
 
     return build($parts);
-
 }
 
 /**
@@ -176,10 +184,13 @@ function normalize($uri) {
  * percent-encoded strings. PHP's parse_url corrupts these characters on OS X.
  *
  * @param string $uri
+ *
  * @return array
+ *
+ * @throws InvalidUriException
  */
-function parse($uri) {
-
+function parse(string $uri): array
+{
     // Normally a URI must be ASCII, however. However, often it's not and
     // parse_url might corrupt these strings.
     //
@@ -187,7 +198,7 @@ function parse($uri) {
     // uriencode them first.
     $uri = preg_replace_callback(
         '/[^[:ascii:]]/u',
-        function($matches) {
+        function ($matches) {
             return rawurlencode($matches[0]);
         },
         $uri
@@ -200,15 +211,14 @@ function parse($uri) {
 
     return
          $result + [
-            'scheme'   => null,
-            'host'     => null,
-            'path'     => null,
-            'port'     => null,
-            'user'     => null,
-            'query'    => null,
+            'scheme' => null,
+            'host' => null,
+            'path' => null,
+            'port' => null,
+            'user' => null,
+            'query' => null,
             'fragment' => null,
         ];
-
 }
 
 /**
@@ -216,46 +226,44 @@ function parse($uri) {
  * it to generate a new uri.
  *
  * @param array $parts
+ *
  * @return string
  */
-function build(array $parts) {
-
+function build(array $parts): string
+{
     $uri = '';
 
     $authority = '';
     if (!empty($parts['host'])) {
         $authority = $parts['host'];
         if (!empty($parts['user'])) {
-            $authority = $parts['user'] . '@' . $authority;
+            $authority = $parts['user'].'@'.$authority;
         }
         if (!empty($parts['port'])) {
-            $authority = $authority . ':' . $parts['port'];
+            $authority = $authority.':'.$parts['port'];
         }
     }
 
     if (!empty($parts['scheme'])) {
         // If there's a scheme, there's also a host.
-        $uri = $parts['scheme'] . ':';
-
+        $uri = $parts['scheme'].':';
     }
-    if ($authority || (!empty($parts['scheme']) && $parts['scheme'] === 'file')) {
+    if ($authority || (!empty($parts['scheme']) && 'file' === $parts['scheme'])) {
         // No scheme, but there is a host.
-        $uri .= '//' . $authority;
-
+        $uri .= '//'.$authority;
     }
 
     if (!empty($parts['path'])) {
         $uri .= $parts['path'];
     }
     if (!empty($parts['query'])) {
-        $uri .= '?' . $parts['query'];
+        $uri .= '?'.$parts['query'];
     }
     if (!empty($parts['fragment'])) {
-        $uri .= '#' . $parts['fragment'];
+        $uri .= '#'.$parts['fragment'];
     }
 
     return $uri;
-
 }
 
 /**
@@ -274,16 +282,17 @@ function build(array $parts) {
  * the end of the string is stripped off.
  *
  * @param string $path
+ *
  * @return array
  */
-function split($path) {
-
+function split(string $path): array
+{
     $matches = [];
     if (preg_match('/^(?:(?:(.*)(?:\/+))?([^\/]+))(?:\/?)$/u', $path, $matches)) {
         return [$matches[1], $matches[2]];
     }
-    return [null,null];
 
+    return [null, null];
 }
 
 /**
@@ -297,10 +306,13 @@ function split($path) {
  * crude and probably slow, so the original parse_url is usually preferred.
  *
  * @param string $uri
+ *
  * @return array
+ *
+ * @throws InvalidUriException
  */
-function _parse_fallback($uri) {
-
+function _parse_fallback(string $uri): array
+{
     // Normally a URI must be ASCII, however. However, often it's not and
     // parse_url might corrupt these strings.
     //
@@ -308,45 +320,43 @@ function _parse_fallback($uri) {
     // uriencode them first.
     $uri = preg_replace_callback(
         '/[^[:ascii:]]/u',
-        function($matches) {
+        function ($matches) {
             return rawurlencode($matches[0]);
         },
         $uri
     );
 
     $result = [
-        'scheme'   => null,
-        'host'     => null,
-        'port'     => null,
-        'user'     => null,
-        'path'     => null,
+        'scheme' => null,
+        'host' => null,
+        'port' => null,
+        'user' => null,
+        'path' => null,
         'fragment' => null,
-        'query'    => null,
+        'query' => null,
     ];
 
     if (preg_match('% ^([A-Za-z][A-Za-z0-9+-\.]+): %x', $uri, $matches)) {
-
         $result['scheme'] = $matches[1];
         // Take what's left.
         $uri = substr($uri, strlen($result['scheme']) + 1);
-
     }
 
     // Taking off a fragment part
-    if (strpos($uri, '#') !== false) {
+    if (false !== strpos($uri, '#')) {
         list($uri, $result['fragment']) = explode('#', $uri, 2);
     }
     // Taking off the query part
-    if (strpos($uri, '?') !== false) {
+    if (false !== strpos($uri, '?')) {
         list($uri, $result['query']) = explode('?', $uri, 2);
     }
 
-    if (substr($uri, 0, 3) === '///') {
-      // The triple slash uris are a bit unusual, but we have special handling
-      // for them.
-      $result['path'] = substr($uri, 2);
-      $result['host'] = '';
-    } elseif (substr($uri, 0, 2) === '//') {
+    if ('///' === substr($uri, 0, 3)) {
+        // The triple slash uris are a bit unusual, but we have special handling
+        // for them.
+        $result['path'] = substr($uri, 2);
+        $result['host'] = '';
+    } elseif ('//' === substr($uri, 0, 2)) {
         // Uris that have an authority part.
         $regex = '
           %^
@@ -360,11 +370,21 @@ function _parse_fallback($uri) {
         if (!preg_match($regex, $uri, $matches)) {
             throw new InvalidUriException('Invalid, or could not parse URI');
         }
-        if ($matches['host']) $result['host'] = $matches['host'];
-        if ($matches['port']) $result['port'] = (int)$matches['port'];
-        if (isset($matches['path'])) $result['path'] = $matches['path'];
-        if ($matches['user']) $result['user'] = $matches['user'];
-        if ($matches['pass']) $result['pass'] = $matches['pass'];
+        if ($matches['host']) {
+            $result['host'] = $matches['host'];
+        }
+        if (isset($matches['port'])) {
+            $result['port'] = (int) $matches['port'];
+        }
+        if (isset($matches['path'])) {
+            $result['path'] = $matches['path'];
+        }
+        if ($matches['user']) {
+            $result['user'] = $matches['user'];
+        }
+        if ($matches['pass']) {
+            $result['pass'] = $matches['pass'];
+        }
     } else {
         $result['path'] = $uri;
     }
diff --git a/vendor/sabre/uri/phpstan.neon b/vendor/sabre/uri/phpstan.neon
new file mode 100644
index 000000000..341d02818
--- /dev/null
+++ b/vendor/sabre/uri/phpstan.neon
@@ -0,0 +1,3 @@
+parameters:
+  level: 7
+  bootstrap: %currentWorkingDirectory%/vendor/autoload.php
diff --git a/vendor/sabre/xml/.gitignore b/vendor/sabre/xml/.gitignore
index accb586c7..51fc188bf 100644
--- a/vendor/sabre/xml/.gitignore
+++ b/vendor/sabre/xml/.gitignore
@@ -2,6 +2,7 @@ vendor
 composer.lock
 tests/cov
 .*.swp
+.php_cs.cache
 
 # Composer binaries
 bin/phpunit
diff --git a/vendor/sabre/xml/.php_cs.dist b/vendor/sabre/xml/.php_cs.dist
new file mode 100644
index 000000000..8d61ee259
--- /dev/null
+++ b/vendor/sabre/xml/.php_cs.dist
@@ -0,0 +1,12 @@
+<?php
+
+$config = PhpCsFixer\Config::create();
+$config->getFinder()
+    ->exclude('vendor')
+    ->in(__DIR__);
+$config->setRules([
+    '@PSR1' => true,
+    '@Symfony' =>true
+]);
+
+return $config;
\ No newline at end of file
diff --git a/vendor/sabre/xml/.travis.yml b/vendor/sabre/xml/.travis.yml
index 96396564e..49a0c9a22 100644
--- a/vendor/sabre/xml/.travis.yml
+++ b/vendor/sabre/xml/.travis.yml
@@ -1,26 +1,31 @@
 language: php
+sudo: required
+dist: xenial
 php:
-  - 5.5
-  - 5.6
   - 7.0
   - 7.1
+  - 7.2
+  - 7.3snapshot
+
+addons:
+  apt:
+    packages:
+    # required for php7.3
+    - libzip4
 
 matrix:
   fast_finish: true
 
-sudo: false
-
 cache:
   directories:
     - $HOME/.composer/cache
 
-before_install:
-  - phpenv config-rm xdebug.ini; true
-
 install:
   - composer install
 
 script:
-  - ./bin/phpunit --configuration tests/phpunit.xml.dist
-  - ./bin/sabre-cs-fixer fix . --dry-run --diff
+  - ./bin/phpunit --configuration tests/phpunit.xml.dist  --coverage-clover=coverage.xml
+
+after_success:
+- bash <(curl -s https://codecov.io/bash)
 
diff --git a/vendor/sabre/xml/CHANGELOG.md b/vendor/sabre/xml/CHANGELOG.md
index faeba20e5..1ad830124 100644
--- a/vendor/sabre/xml/CHANGELOG.md
+++ b/vendor/sabre/xml/CHANGELOG.md
@@ -1,11 +1,38 @@
 ChangeLog
 =========
 
-1.5.1 (2019-01-09)
+2.1.3 (2019-08-14)
+------------------
+
+* #166: Throw exception when empty inputs found
+
+2.1.2 (2019-01-09)
 ------------------
 
 * #161: Prevent infinite loop on empty xml elements
 
+2.1.1 (2018-10-09)
+------------------
+
+* #149: Properly detect xml parse errors in `parseCurrentElement()` edge-cases
+
+
+2.1.0 (2018-02-08)
+------------------
+
+* #112: Added a `mixedContent` deserializer function, which might be useful
+  if you're parsing HTML-like documents with elements that contain both text
+  and other elements as siblings. (@staabm).
+
+
+2.0.0 (2016-11-15)
+------------------
+
+* Now requires PHP 7.
+* Uses typehints everywhere.
+* Fixed some minor strict typing-related issues.
+* Removed workaround for PHP bug [64230](https://bugs.php.net/bug.php?id=64230).
+
 
 1.5.0 (2016-10-09)
 ------------------
diff --git a/vendor/sabre/xml/README.md b/vendor/sabre/xml/README.md
index e6fc4db5f..55af24fc6 100644
--- a/vendor/sabre/xml/README.md
+++ b/vendor/sabre/xml/README.md
@@ -1,7 +1,7 @@
 sabre/xml
 =========
 
-[![Build Status](https://secure.travis-ci.org/fruux/sabre-xml.svg?branch=master)](http://travis-ci.org/fruux/sabre-xml)
+[![Build Status](https://secure.travis-ci.org/sabre-io/xml.svg?branch=master)](http://travis-ci.org/sabre-io/xml)
 
 The sabre/xml library is a specialized XML reader and writer.
 
diff --git a/vendor/sabre/xml/composer.json b/vendor/sabre/xml/composer.json
index 1b5760393..c782dbc5e 100644
--- a/vendor/sabre/xml/composer.json
+++ b/vendor/sabre/xml/composer.json
@@ -5,7 +5,7 @@
     "homepage" : "https://sabre.io/xml/",
     "license" : "BSD-3-Clause",
     "require" : {
-        "php" : ">=5.5.5",
+        "php" : ">=7.0",
         "ext-xmlwriter" : "*",
         "ext-xmlreader" : "*",
         "ext-dom" : "*",
@@ -44,8 +44,7 @@
         }
     },
     "require-dev": {
-        "sabre/cs": "~1.0.0",
-        "phpunit/phpunit" : "~4.8|~5.7"
+        "phpunit/phpunit" : "^6"
     },
     "config" : {
         "bin-dir" : "bin/"
diff --git a/vendor/sabre/xml/lib/ContextStackTrait.php b/vendor/sabre/xml/lib/ContextStackTrait.php
index ee3a3baca..bc770ffad 100644
--- a/vendor/sabre/xml/lib/ContextStackTrait.php
+++ b/vendor/sabre/xml/lib/ContextStackTrait.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 /**
- * Context Stack
+ * Context Stack.
  *
  * The Context maintains information about a document during either reading or
  * writing.
@@ -19,8 +21,8 @@ namespace Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-trait ContextStackTrait {
-
+trait ContextStackTrait
+{
     /**
      * This is the element map. It contains a list of XML elements (in clark
      * notation) as keys and PHP class names as values.
@@ -90,34 +92,27 @@ trait ContextStackTrait {
      * This allows you to safely modify the elementMap, contextUri or
      * namespaceMap. After you're done, you can restore the old data again
      * with popContext.
-     *
-     * @return null
      */
-    function pushContext() {
-
+    public function pushContext()
+    {
         $this->contextStack[] = [
             $this->elementMap,
             $this->contextUri,
             $this->namespaceMap,
-            $this->classMap
+            $this->classMap,
         ];
-
     }
 
     /**
      * Restore the previous "context".
-     *
-     * @return null
      */
-    function popContext() {
-
+    public function popContext()
+    {
         list(
             $this->elementMap,
             $this->contextUri,
             $this->namespaceMap,
             $this->classMap
         ) = array_pop($this->contextStack);
-
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Deserializer/functions.php b/vendor/sabre/xml/lib/Deserializer/functions.php
index 07038d99a..0eff4b7e0 100644
--- a/vendor/sabre/xml/lib/Deserializer/functions.php
+++ b/vendor/sabre/xml/lib/Deserializer/functions.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Deserializer;
 
 use Sabre\Xml\Reader;
@@ -52,17 +54,13 @@ use Sabre\Xml\Reader;
  *
  * Attributes will be removed from the top-level elements. If elements with
  * the same name appear twice in the list, only the last one will be kept.
- *
- *
- * @param Reader $reader
- * @param string $namespace
- * @return array
  */
-function keyValue(Reader $reader, $namespace = null) {
-
+function keyValue(Reader $reader, string $namespace = null): array
+{
     // If there's no children, we don't do anything.
     if ($reader->isEmptyElement) {
         $reader->next();
+
         return [];
     }
 
@@ -81,9 +79,8 @@ function keyValue(Reader $reader, $namespace = null) {
     $values = [];
 
     do {
-
-        if ($reader->nodeType === Reader::ELEMENT) {
-            if ($namespace !== null && $reader->namespaceURI === $namespace) {
+        if (Reader::ELEMENT === $reader->nodeType) {
+            if (null !== $namespace && $reader->namespaceURI === $namespace) {
                 $values[$reader->localName] = $reader->parseCurrentElement()['value'];
             } else {
                 $clark = $reader->getClark();
@@ -94,12 +91,11 @@ function keyValue(Reader $reader, $namespace = null) {
                 break;
             }
         }
-    } while ($reader->nodeType !== Reader::END_ELEMENT);
+    } while (Reader::END_ELEMENT !== $reader->nodeType);
 
     $reader->read();
 
     return $values;
-
 }
 
 /**
@@ -146,15 +142,14 @@ function keyValue(Reader $reader, $namespace = null) {
  *   "elem5",
  * ];
  *
- * @param Reader $reader
- * @param string $namespace
  * @return string[]
  */
-function enum(Reader $reader, $namespace = null) {
-
+function enum(Reader $reader, string $namespace = null): array
+{
     // If there's no children, we don't do anything.
     if ($reader->isEmptyElement) {
         $reader->next();
+
         return [];
     }
     if (!$reader->read()) {
@@ -172,8 +167,7 @@ function enum(Reader $reader, $namespace = null) {
 
     $values = [];
     do {
-
-        if ($reader->nodeType !== Reader::ELEMENT) {
+        if (Reader::ELEMENT !== $reader->nodeType) {
             continue;
         }
         if (!is_null($namespace) && $namespace === $reader->namespaceURI) {
@@ -181,12 +175,11 @@ function enum(Reader $reader, $namespace = null) {
         } else {
             $values[] = $reader->getClark();
         }
-
     } while ($reader->depth >= $currentDepth && $reader->next());
 
     $reader->next();
-    return $values;
 
+    return $values;
 }
 
 /**
@@ -196,16 +189,14 @@ function enum(Reader $reader, $namespace = null) {
  * This is primarily used by the mapValueObject function from the Service
  * class, but it can also easily be used for more specific situations.
  *
- * @param Reader $reader
- * @param string $className
- * @param string $namespace
  * @return object
  */
-function valueObject(Reader $reader, $className, $namespace) {
-
+function valueObject(Reader $reader, string $className, string $namespace)
+{
     $valueObject = new $className();
     if ($reader->isEmptyElement) {
         $reader->next();
+
         return $valueObject;
     }
 
@@ -213,9 +204,7 @@ function valueObject(Reader $reader, $className, $namespace) {
 
     $reader->read();
     do {
-
-        if ($reader->nodeType === Reader::ELEMENT && $reader->namespaceURI == $namespace) {
-
+        if (Reader::ELEMENT === $reader->nodeType && $reader->namespaceURI == $namespace) {
             if (property_exists($valueObject, $reader->localName)) {
                 if (is_array($defaultProperties[$reader->localName])) {
                     $valueObject->{$reader->localName}[] = $reader->parseCurrentElement()['value'];
@@ -231,16 +220,16 @@ function valueObject(Reader $reader, $className, $namespace) {
                 break;
             }
         }
-    } while ($reader->nodeType !== Reader::END_ELEMENT);
+    } while (Reader::END_ELEMENT !== $reader->nodeType);
 
     $reader->read();
-    return $valueObject;
 
+    return $valueObject;
 }
 
 /**
  * This deserializer helps you deserialize xml structures that look like
- * this:
+ * this:.
  *
  * <collection>
  *    <item>...</item>
@@ -248,7 +237,7 @@ function valueObject(Reader $reader, $className, $namespace) {
  *    <item>...</item>
  * </collection>
  *
- * Many XML documents use  patterns like that, and this deserializer
+ * Many XML documents use patterns like that, and this deserializer
  * allow you to get all the 'items' as an array.
  *
  * In that previous example, you would register the deserializer as such:
@@ -259,25 +248,71 @@ function valueObject(Reader $reader, $className, $namespace) {
  *
  * The repeatingElements deserializer simply returns everything as an array.
  *
- * @param Reader $reader
- * @param string $childElementName Element name in clark-notation
- * @return array
+ * $childElementName must either be a a clark-notation element name, or if no
+ * namespace is used, the bare element name.
  */
-function repeatingElements(Reader $reader, $childElementName) {
-
-    if ($childElementName[0] !== '{') {
-        $childElementName = '{}' . $childElementName;
+function repeatingElements(Reader $reader, string $childElementName): array
+{
+    if ('{' !== $childElementName[0]) {
+        $childElementName = '{}'.$childElementName;
     }
     $result = [];
 
     foreach ($reader->parseGetElements() as $element) {
-
         if ($element['name'] === $childElementName) {
             $result[] = $element['value'];
         }
-
     }
 
     return $result;
+}
+
+/**
+ * This deserializer helps you to deserialize structures which contain mixed content like this:.
+ *
+ * <p>some text <extref>and a inline tag</extref>and even more text</p>
+ *
+ * The above example will return
+ *
+ * [
+ *     'some text',
+ *     [
+ *         'name'       => '{}extref',
+ *         'value'      => 'and a inline tag',
+ *         'attributes' => []
+ *     ],
+ *     'and even more text'
+ * ]
+ *
+ * In strict XML documents you wont find this kind of markup but in html this is a quite common pattern.
+ */
+function mixedContent(Reader $reader): array
+{
+    // If there's no children, we don't do anything.
+    if ($reader->isEmptyElement) {
+        $reader->next();
+
+        return [];
+    }
+
+    $previousDepth = $reader->depth;
+
+    $content = [];
+    $reader->read();
+    while (true) {
+        if (Reader::ELEMENT == $reader->nodeType) {
+            $content[] = $reader->parseCurrentElement();
+        } elseif ($reader->depth >= $previousDepth && in_array($reader->nodeType, [Reader::TEXT, Reader::CDATA, Reader::WHITESPACE])) {
+            $content[] = $reader->value;
+            $reader->read();
+        } elseif (Reader::END_ELEMENT == $reader->nodeType) {
+            // Ensuring we are moving the cursor after the end element.
+            $reader->read();
+            break;
+        } else {
+            $reader->read();
+        }
+    }
 
+    return $content;
 }
diff --git a/vendor/sabre/xml/lib/Element.php b/vendor/sabre/xml/lib/Element.php
index dd89c5888..559eb54ea 100644
--- a/vendor/sabre/xml/lib/Element.php
+++ b/vendor/sabre/xml/lib/Element.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 /**
@@ -15,6 +17,6 @@ namespace Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface Element extends XmlSerializable, XmlDeserializable {
-
+interface Element extends XmlSerializable, XmlDeserializable
+{
 }
diff --git a/vendor/sabre/xml/lib/Element/Base.php b/vendor/sabre/xml/lib/Element/Base.php
index f59ba49a0..a1ce7ea5a 100644
--- a/vendor/sabre/xml/lib/Element/Base.php
+++ b/vendor/sabre/xml/lib/Element/Base.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Element;
 
 use Sabre\Xml;
@@ -15,8 +17,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Base implements Xml\Element {
-
+class Base implements Xml\Element
+{
     /**
      * PHP value to serialize.
      *
@@ -25,14 +27,11 @@ class Base implements Xml\Element {
     protected $value;
 
     /**
-     * Constructor
-     *
-     * @param mixed $value
+     * Constructor.
      */
-    function __construct($value = null) {
-
+    public function __construct($value = null)
+    {
         $this->value = $value;
-
     }
 
     /**
@@ -50,14 +49,10 @@ class Base implements Xml\Element {
      * This allows serializers to be re-used for different element names.
      *
      * If you are opening new elements, you must also close them again.
-     *
-     * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         $writer->write($this->value);
-
     }
 
     /**
@@ -78,14 +73,12 @@ class Base implements Xml\Element {
      * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
      * the next element.
      *
-     * @param Xml\Reader $reader
      * @return mixed
      */
-    static function xmlDeserialize(Xml\Reader $reader) {
-
+    public static function xmlDeserialize(Xml\Reader $reader)
+    {
         $subTree = $reader->parseInnerTree();
-        return $subTree;
 
+        return $subTree;
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Element/Cdata.php b/vendor/sabre/xml/lib/Element/Cdata.php
index 5f42c4c6e..61d3213ff 100644
--- a/vendor/sabre/xml/lib/Element/Cdata.php
+++ b/vendor/sabre/xml/lib/Element/Cdata.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Element;
 
 use Sabre\Xml;
@@ -27,11 +29,9 @@ class Cdata implements Xml\XmlSerializable
     protected $value;
 
     /**
-     * Constructor
-     *
-     * @param string $value
+     * Constructor.
      */
-    function __construct($value)
+    public function __construct(string $value)
     {
         $this->value = $value;
     }
@@ -51,14 +51,9 @@ class Cdata implements Xml\XmlSerializable
      * This allows serializers to be re-used for different element names.
      *
      * If you are opening new elements, you must also close them again.
-     *
-     * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         $writer->writeCData($this->value);
-
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Element/Elements.php b/vendor/sabre/xml/lib/Element/Elements.php
index 9eefd1bf8..e51179833 100644
--- a/vendor/sabre/xml/lib/Element/Elements.php
+++ b/vendor/sabre/xml/lib/Element/Elements.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Element;
 
 use Sabre\Xml;
@@ -8,7 +10,7 @@ use Sabre\Xml\Serializer;
 
 /**
  * 'Elements' is a simple list of elements, without values or attributes.
- * For example, Elements will parse:
+ * For example, Elements will parse:.
  *
  * <?xml version="1.0"?>
  * <s:root xmlns:s="http://sabredav.org/ns">
@@ -33,24 +35,21 @@ use Sabre\Xml\Serializer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Elements implements Xml\Element {
-
+class Elements implements Xml\Element
+{
     /**
-     * Value to serialize
+     * Value to serialize.
      *
      * @var array
      */
     protected $value;
 
     /**
-     * Constructor
-     *
-     * @param array $value
+     * Constructor.
      */
-    function __construct(array $value = []) {
-
+    public function __construct(array $value = [])
+    {
         $this->value = $value;
-
     }
 
     /**
@@ -68,14 +67,10 @@ class Elements implements Xml\Element {
      * This allows serializers to be re-used for different element names.
      *
      * If you are opening new elements, you must also close them again.
-     *
-     * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         Serializer\enum($writer, $this->value);
-
     }
 
     /**
@@ -96,13 +91,10 @@ class Elements implements Xml\Element {
      * $reader->parseSubTree() will parse the entire sub-tree, and advance to
      * the next element.
      *
-     * @param Xml\Reader $reader
      * @return mixed
      */
-    static function xmlDeserialize(Xml\Reader $reader) {
-
+    public static function xmlDeserialize(Xml\Reader $reader)
+    {
         return Deserializer\enum($reader);
-
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Element/KeyValue.php b/vendor/sabre/xml/lib/Element/KeyValue.php
index 7ce53bf4c..dacee000a 100644
--- a/vendor/sabre/xml/lib/Element/KeyValue.php
+++ b/vendor/sabre/xml/lib/Element/KeyValue.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Element;
 
 use Sabre\Xml;
@@ -33,24 +35,21 @@ use Sabre\Xml\Deserializer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class KeyValue implements Xml\Element {
-
+class KeyValue implements Xml\Element
+{
     /**
-     * Value to serialize
+     * Value to serialize.
      *
      * @var array
      */
     protected $value;
 
     /**
-     * Constructor
-     *
-     * @param array $value
+     * Constructor.
      */
-    function __construct(array $value = []) {
-
+    public function __construct(array $value = [])
+    {
         $this->value = $value;
-
     }
 
     /**
@@ -68,14 +67,10 @@ class KeyValue implements Xml\Element {
      * This allows serializers to be re-used for different element names.
      *
      * If you are opening new elements, you must also close them again.
-     *
-     * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         $writer->write($this->value);
-
     }
 
     /**
@@ -96,13 +91,10 @@ class KeyValue implements Xml\Element {
      * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
      * the next element.
      *
-     * @param Xml\Reader $reader
      * @return mixed
      */
-    static function xmlDeserialize(Xml\Reader $reader) {
-
+    public static function xmlDeserialize(Xml\Reader $reader)
+    {
         return Deserializer\keyValue($reader);
-
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Element/Uri.php b/vendor/sabre/xml/lib/Element/Uri.php
index 8f45c0027..898a26457 100644
--- a/vendor/sabre/xml/lib/Element/Uri.php
+++ b/vendor/sabre/xml/lib/Element/Uri.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Element;
 
 use Sabre\Xml;
@@ -20,8 +22,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Uri implements Xml\Element {
-
+class Uri implements Xml\Element
+{
     /**
      * Uri element value.
      *
@@ -30,11 +32,11 @@ class Uri implements Xml\Element {
     protected $value;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param string $value
      */
-    function __construct($value)
+    public function __construct($value)
     {
         $this->value = $value;
     }
@@ -54,19 +56,15 @@ class Uri implements Xml\Element {
      * This allows serializers to be re-used for different element names.
      *
      * If you are opening new elements, you must also close them again.
-     *
-     * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         $writer->text(
             \Sabre\Uri\resolve(
                 $writer->contextUri,
                 $this->value
             )
         );
-
     }
 
     /**
@@ -87,18 +85,15 @@ class Uri implements Xml\Element {
      * $reader->parseSubTree() will parse the entire sub-tree, and advance to
      * the next element.
      *
-     * @param Xml\Reader $reader
      * @return mixed
      */
-    static function xmlDeserialize(Xml\Reader $reader) {
-
+    public static function xmlDeserialize(Xml\Reader $reader)
+    {
         return new self(
             \Sabre\Uri\resolve(
                 $reader->contextUri,
                 $reader->readText()
             )
         );
-
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Element/XmlFragment.php b/vendor/sabre/xml/lib/Element/XmlFragment.php
index 642241ca4..413e0f106 100644
--- a/vendor/sabre/xml/lib/Element/XmlFragment.php
+++ b/vendor/sabre/xml/lib/Element/XmlFragment.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Element;
 
 use Sabre\Xml\Element;
@@ -20,20 +22,29 @@ use Sabre\Xml\Writer;
  * 3. It will have all the relevant xmlns attributes.
  * 4. It may not have a root element.
  */
-class XmlFragment implements Element {
-
+class XmlFragment implements Element
+{
+    /**
+     * The inner XML value.
+     *
+     * @var string
+     */
     protected $xml;
 
-    function __construct($xml) {
-
+    /**
+     * Constructor.
+     */
+    public function __construct(string $xml)
+    {
         $this->xml = $xml;
-
     }
 
-    function getXml() {
-
+    /**
+     * Returns the inner XML document.
+     */
+    public function getXml(): string
+    {
         return $this->xml;
-
     }
 
     /**
@@ -51,12 +62,9 @@ class XmlFragment implements Element {
      * This allows serializers to be re-used for different element names.
      *
      * If you are opening new elements, you must also close them again.
-     *
-     * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         $reader = new Reader();
 
         // Wrapping the xml in a container, so root-less values can still be
@@ -69,28 +77,26 @@ XML;
         $reader->xml($xml);
 
         while ($reader->read()) {
-
             if ($reader->depth < 1) {
                 // Skipping the root node.
                 continue;
             }
 
             switch ($reader->nodeType) {
-
-                case Reader::ELEMENT :
+                case Reader::ELEMENT:
                     $writer->startElement(
                         $reader->getClark()
                     );
                     $empty = $reader->isEmptyElement;
                     while ($reader->moveToNextAttribute()) {
                         switch ($reader->namespaceURI) {
-                            case '' :
+                            case '':
                                 $writer->writeAttribute($reader->localName, $reader->value);
                                 break;
-                            case 'http://www.w3.org/2000/xmlns/' :
+                            case 'http://www.w3.org/2000/xmlns/':
                                 // Skip namespace declarations
                                 break;
-                            default :
+                            default:
                                 $writer->writeAttribute($reader->getClark(), $reader->value);
                                 break;
                         }
@@ -99,20 +105,17 @@ XML;
                         $writer->endElement();
                     }
                     break;
-                case Reader::CDATA :
-                case Reader::TEXT :
+                case Reader::CDATA:
+                case Reader::TEXT:
                     $writer->text(
                         $reader->value
                     );
                     break;
-                case Reader::END_ELEMENT :
+                case Reader::END_ELEMENT:
                     $writer->endElement();
                     break;
-
             }
-
         }
-
     }
 
     /**
@@ -133,15 +136,13 @@ XML;
      * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
      * the next element.
      *
-     * @param Reader $reader
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = new self($reader->readInnerXml());
         $reader->next();
-        return $result;
 
+        return $result;
     }
-
 }
diff --git a/vendor/sabre/xml/lib/LibXMLException.php b/vendor/sabre/xml/lib/LibXMLException.php
index f0190eb51..4701c304a 100644
--- a/vendor/sabre/xml/lib/LibXMLException.php
+++ b/vendor/sabre/xml/lib/LibXMLException.php
@@ -1,9 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
-use
-    LibXMLError;
+use LibXMLError;
+use Throwable;
 
 /**
  * This exception is thrown when the Readers runs into a parsing error.
@@ -14,12 +16,12 @@ use
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class LibXMLException extends ParseException {
-
+class LibXMLException extends ParseException
+{
     /**
      * The error list.
      *
-     * @var LibXMLError[]
+     * @var []LibXMLError
      */
     protected $errors;
 
@@ -28,26 +30,21 @@ class LibXMLException extends ParseException {
      *
      * You should pass a list of LibXMLError objects in its constructor.
      *
-     * @param LibXMLError[] $errors
-     * @param int $code
-     * @param Exception $previousException
+     * @param []LibXMLError $errors
+     * @param int           $code
+     * @param Throwable     $previousException
      */
-    function __construct(array $errors, $code = null, Exception $previousException = null) {
-
+    public function __construct(array $errors, int $code = 0, Throwable $previousException = null)
+    {
         $this->errors = $errors;
-        parent::__construct($errors[0]->message . ' on line ' . $errors[0]->line . ', column ' . $errors[0]->column, $code, $previousException);
-
+        parent::__construct($errors[0]->message.' on line '.$errors[0]->line.', column '.$errors[0]->column, $code, $previousException);
     }
 
     /**
-     * Returns the LibXML errors
-     *
-     * @return void
+     * Returns the LibXML errors.
      */
-    function getErrors() {
-
+    public function getErrors(): array
+    {
         return $this->errors;
-
     }
-
 }
diff --git a/vendor/sabre/xml/lib/ParseException.php b/vendor/sabre/xml/lib/ParseException.php
index 3a6883b2f..e237b8732 100644
--- a/vendor/sabre/xml/lib/ParseException.php
+++ b/vendor/sabre/xml/lib/ParseException.php
@@ -1,9 +1,10 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
-use
-    Exception;
+use Exception;
 
 /**
  * This is a base exception for any exception related to parsing xml files.
@@ -12,6 +13,6 @@ use
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ParseException extends Exception {
-
+class ParseException extends Exception
+{
 }
diff --git a/vendor/sabre/xml/lib/Reader.php b/vendor/sabre/xml/lib/Reader.php
index 92e5dba96..37e0c86dd 100644
--- a/vendor/sabre/xml/lib/Reader.php
+++ b/vendor/sabre/xml/lib/Reader.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 use XMLReader;
@@ -17,8 +19,8 @@ use XMLReader;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Reader extends XMLReader {
-
+class Reader extends XMLReader
+{
     use ContextStackTrait;
 
     /**
@@ -31,14 +33,13 @@ class Reader extends XMLReader {
      *
      * @return string|null
      */
-    function getClark() {
-
-        if (! $this->localName) {
+    public function getClark()
+    {
+        if (!$this->localName) {
             return null;
         }
 
-        return '{' . $this->namespaceURI . '}' . $this->localName;
-
+        return '{'.$this->namespaceURI.'}'.$this->localName;
     }
 
     /**
@@ -51,31 +52,30 @@ class Reader extends XMLReader {
      *
      * This function will also disable the standard libxml error handler (which
      * usually just results in PHP errors), and throw exceptions instead.
-     *
-     * @return array
      */
-    function parse() {
-
+    public function parse(): array
+    {
         $previousEntityState = libxml_disable_entity_loader(true);
         $previousSetting = libxml_use_internal_errors(true);
 
         try {
-
-            // Really sorry about the silence operator, seems like I have no
-            // choice. See:
-            //
-            // https://bugs.php.net/bug.php?id=64230
-            while ($this->nodeType !== self::ELEMENT && @$this->read()) {
-                // noop
+            while (self::ELEMENT !== $this->nodeType) {
+                if (!$this->read()) {
+                    $errors = libxml_get_errors();
+                    libxml_clear_errors();
+                    if ($errors) {
+                        throw new LibXMLException($errors);
+                    }
+                }
             }
             $result = $this->parseCurrentElement();
 
+            // last line of defense in case errors did occur above
             $errors = libxml_get_errors();
             libxml_clear_errors();
             if ($errors) {
                 throw new LibXMLException($errors);
             }
-
         } finally {
             libxml_use_internal_errors($previousSetting);
             libxml_disable_entity_loader($previousEntityState);
@@ -84,8 +84,6 @@ class Reader extends XMLReader {
         return $result;
     }
 
-
-
     /**
      * parseGetElements parses everything in the current sub-tree,
      * and returns a an array of elements.
@@ -98,18 +96,15 @@ class Reader extends XMLReader {
      *
      * If the $elementMap argument is specified, the existing elementMap will
      * be overridden while parsing the tree, and restored after this process.
-     *
-     * @param array $elementMap
-     * @return array
      */
-    function parseGetElements(array $elementMap = null) {
-
+    public function parseGetElements(array $elementMap = null): array
+    {
         $result = $this->parseInnerTree($elementMap);
         if (!is_array($result)) {
             return [];
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -123,17 +118,17 @@ class Reader extends XMLReader {
      * If the $elementMap argument is specified, the existing elementMap will
      * be overridden while parsing the tree, and restored after this process.
      *
-     * @param array $elementMap
      * @return array|string
      */
-    function parseInnerTree(array $elementMap = null) {
-
+    public function parseInnerTree(array $elementMap = null)
+    {
         $text = null;
         $elements = [];
 
-        if ($this->nodeType === self::ELEMENT && $this->isEmptyElement) {
+        if (self::ELEMENT === $this->nodeType && $this->isEmptyElement) {
             // Easy!
             $this->next();
+
             return null;
         }
 
@@ -143,12 +138,7 @@ class Reader extends XMLReader {
         }
 
         try {
-
-            // Really sorry about the silence operator, seems like I have no
-            // choice. See:
-            //
-            // https://bugs.php.net/bug.php?id=64230
-            if (!@$this->read()) {
+            if (!$this->read()) {
                 $errors = libxml_get_errors();
                 libxml_clear_errors();
                 if ($errors) {
@@ -158,9 +148,7 @@ class Reader extends XMLReader {
             }
 
             while (true) {
-
                 if (!$this->isValid()) {
-
                     $errors = libxml_get_errors();
 
                     if ($errors) {
@@ -170,46 +158,40 @@ class Reader extends XMLReader {
                 }
 
                 switch ($this->nodeType) {
-                    case self::ELEMENT :
+                    case self::ELEMENT:
                         $elements[] = $this->parseCurrentElement();
                         break;
-                    case self::TEXT :
-                    case self::CDATA :
+                    case self::TEXT:
+                    case self::CDATA:
                         $text .= $this->value;
                         $this->read();
                         break;
-                    case self::END_ELEMENT :
+                    case self::END_ELEMENT:
                         // Ensuring we are moving the cursor after the end element.
                         $this->read();
                         break 2;
-                    case self::NONE :
+                    case self::NONE:
                         throw new ParseException('We hit the end of the document prematurely. This likely means that some parser "eats" too many elements. Do not attempt to continue parsing.');
-                    default :
+                    default:
                         // Advance to the next element
                         $this->read();
                         break;
                 }
-
             }
-
         } finally {
-
             if (!is_null($elementMap)) {
                 $this->popContext();
             }
-
         }
-        return ($elements ? $elements : $text);
 
+        return $elements ? $elements : $text;
     }
 
     /**
      * Reads all text below the current element, and returns this as a string.
-     *
-     * @return string
      */
-    function readText() {
-
+    public function readText(): string
+    {
         $result = '';
         $previousDepth = $this->depth;
 
@@ -218,8 +200,8 @@ class Reader extends XMLReader {
                 $result .= $this->value;
             }
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -229,11 +211,9 @@ class Reader extends XMLReader {
      *   * name - A clark-notation XML element name.
      *   * value - The parsed value.
      *   * attributes - A key-value list of attributes.
-     *
-     * @return array
      */
-    function parseCurrentElement() {
-
+    public function parseCurrentElement(): array
+    {
         $name = $this->getClark();
 
         $attributes = [];
@@ -248,13 +228,12 @@ class Reader extends XMLReader {
         );
 
         return [
-            'name'       => $name,
-            'value'      => $value,
+            'name' => $name,
+            'value' => $value,
             'attributes' => $attributes,
         ];
     }
 
-
     /**
      * Grabs all the attributes from the current element, and returns them as a
      * key-value array.
@@ -262,24 +241,20 @@ class Reader extends XMLReader {
      * If the attributes are part of the same namespace, they will simply be
      * short keys. If they are defined on a different namespace, the attribute
      * name will be retured in clark-notation.
-     *
-     * @return array
      */
-    function parseAttributes() {
-
+    public function parseAttributes(): array
+    {
         $attributes = [];
 
         while ($this->moveToNextAttribute()) {
             if ($this->namespaceURI) {
-
                 // Ignoring 'xmlns', it doesn't make any sense.
-                if ($this->namespaceURI === 'http://www.w3.org/2000/xmlns/') {
+                if ('http://www.w3.org/2000/xmlns/' === $this->namespaceURI) {
                     continue;
                 }
 
                 $name = $this->getClark();
                 $attributes[$name] = $this->value;
-
             } else {
                 $attributes[$this->localName] = $this->value;
             }
@@ -287,21 +262,16 @@ class Reader extends XMLReader {
         $this->moveToElement();
 
         return $attributes;
-
     }
 
     /**
      * Returns the function that should be used to parse the element identified
      * by it's clark-notation name.
-     *
-     * @param string $name
-     * @return callable
      */
-    function getDeserializerForElementName($name) {
-
-
+    public function getDeserializerForElementName(string $name): callable
+    {
         if (!array_key_exists($name, $this->elementMap)) {
-            if (substr($name, 0, 2) == '{}' && array_key_exists(substr($name, 2), $this->elementMap)) {
+            if ('{}' == substr($name, 0, 2) && array_key_exists(substr($name, 2), $this->elementMap)) {
                 $name = substr($name, 2);
             } else {
                 return ['Sabre\\Xml\\Element\\Base', 'xmlDeserialize'];
@@ -318,13 +288,11 @@ class Reader extends XMLReader {
         }
 
         $type = gettype($deserializer);
-        if ($type === 'string') {
-            $type .= ' (' . $deserializer . ')';
-        } elseif ($type === 'object') {
-            $type .= ' (' . get_class($deserializer) . ')';
+        if ('string' === $type) {
+            $type .= ' ('.$deserializer.')';
+        } elseif ('object' === $type) {
+            $type .= ' ('.get_class($deserializer).')';
         }
-        throw new \LogicException('Could not use this type as a deserializer: ' . $type . ' for element: ' . $name);
-
+        throw new \LogicException('Could not use this type as a deserializer: '.$type.' for element: '.$name);
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Serializer/functions.php b/vendor/sabre/xml/lib/Serializer/functions.php
index 21448017d..3694d9791 100644
--- a/vendor/sabre/xml/lib/Serializer/functions.php
+++ b/vendor/sabre/xml/lib/Serializer/functions.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml\Serializer;
 
 use InvalidArgumentException;
@@ -34,12 +36,10 @@ use Sabre\Xml\XmlSerializable;
  * <s:elem4>content</s:elem4>
  * <s:elem5 attr="val" />
  *
- * @param Writer $writer
  * @param string[] $values
- * @return void
  */
-function enum(Writer $writer, array $values) {
-
+function enum(Writer $writer, array $values)
+{
     foreach ($values as $value) {
         $writer->writeElement($value);
     }
@@ -54,29 +54,26 @@ function enum(Writer $writer, array $values) {
  * Values that are set to null or an empty array are not serialized. To
  * serialize empty properties, you must specify them as an empty string.
  *
- * @param Writer $writer
  * @param object $valueObject
- * @param string $namespace
  */
-function valueObject(Writer $writer, $valueObject, $namespace) {
+function valueObject(Writer $writer, $valueObject, string $namespace)
+{
     foreach (get_object_vars($valueObject) as $key => $val) {
         if (is_array($val)) {
             // If $val is an array, it has a special meaning. We need to
             // generate one child element for each item in $val
             foreach ($val as $child) {
-                $writer->writeElement('{' . $namespace . '}' . $key, $child);
+                $writer->writeElement('{'.$namespace.'}'.$key, $child);
             }
-
-        } elseif ($val !== null) {
-            $writer->writeElement('{' . $namespace . '}' . $key, $val);
+        } elseif (null !== $val) {
+            $writer->writeElement('{'.$namespace.'}'.$key, $val);
         }
     }
 }
 
-
 /**
  * This serializer helps you serialize xml structures that look like
- * this:
+ * this:.
  *
  * <collection>
  *    <item>...</item>
@@ -88,18 +85,12 @@ function valueObject(Writer $writer, $valueObject, $namespace) {
  * and this could be called like this:
  *
  * repeatingElements($writer, $items, '{}item');
- *
- * @param Writer $writer
- * @param array $items A list of items sabre/xml can serialize.
- * @param string $childElementName Element name in clark-notation
- * @return void
  */
-function repeatingElements(Writer $writer, array $items, $childElementName) {
-
+function repeatingElements(Writer $writer, array $items, string $childElementName)
+{
     foreach ($items as $item) {
         $writer->writeElement($childElementName, $item);
     }
-
 }
 
 /**
@@ -157,38 +148,25 @@ function repeatingElements(Writer $writer, array $items, $childElementName) {
  *
  * You can even mix the two array syntaxes.
  *
- * @param Writer $writer
  * @param string|int|float|bool|array|object
- * @return void
  */
-function standardSerializer(Writer $writer, $value) {
-
+function standardSerializer(Writer $writer, $value)
+{
     if (is_scalar($value)) {
-
         // String, integer, float, boolean
-        $writer->text($value);
-
+        $writer->text((string) $value);
     } elseif ($value instanceof XmlSerializable) {
-
         // XmlSerializable classes or Element classes.
         $value->xmlSerialize($writer);
-
     } elseif (is_object($value) && isset($writer->classMap[get_class($value)])) {
-
         // It's an object which class appears in the classmap.
         $writer->classMap[get_class($value)]($writer, $value);
-
     } elseif (is_callable($value)) {
-
         // A callback
         $value($writer);
-
     } elseif (is_null($value)) {
-
         // nothing!
-
     } elseif (is_array($value) && array_key_exists('name', $value)) {
-
         // if the array had a 'name' element, we assume that this array
         // describes a 'name' and optionally 'attributes' and 'value'.
 
@@ -200,19 +178,13 @@ function standardSerializer(Writer $writer, $value) {
         $writer->writeAttributes($attributes);
         $writer->write($value);
         $writer->endElement();
-
     } elseif (is_array($value)) {
-
         foreach ($value as $name => $item) {
-
             if (is_int($name)) {
-
                 // This item has a numeric index. We just loop through the
                 // array and throw it back in the writer.
                 standardSerializer($writer, $item);
-
             } elseif (is_string($name) && is_array($item) && isset($item['attributes'])) {
-
                 // The key is used for a name, but $item has 'attributes' and
                 // possibly 'value'
                 $writer->startElement($name);
@@ -221,29 +193,18 @@ function standardSerializer(Writer $writer, $value) {
                     $writer->write($item['value']);
                 }
                 $writer->endElement();
-
             } elseif (is_string($name)) {
-
                 // This was a plain key-value array.
                 $writer->startElement($name);
                 $writer->write($item);
                 $writer->endElement();
-
             } else {
-
-                throw new InvalidArgumentException('The writer does not know how to serialize arrays with keys of type: ' . gettype($name));
-
+                throw new InvalidArgumentException('The writer does not know how to serialize arrays with keys of type: '.gettype($name));
             }
         }
-
     } elseif (is_object($value)) {
-
-        throw new InvalidArgumentException('The writer cannot serialize objects of class: ' . get_class($value));
-
+        throw new InvalidArgumentException('The writer cannot serialize objects of class: '.get_class($value));
     } else {
-
-        throw new InvalidArgumentException('The writer cannot serialize values of type: ' . gettype($value));
-
+        throw new InvalidArgumentException('The writer cannot serialize values of type: '.gettype($value));
     }
-
 }
diff --git a/vendor/sabre/xml/lib/Service.php b/vendor/sabre/xml/lib/Service.php
index acea94ea9..882b2dc2c 100644
--- a/vendor/sabre/xml/lib/Service.php
+++ b/vendor/sabre/xml/lib/Service.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 /**
@@ -13,8 +15,8 @@ namespace Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Service {
-
+class Service
+{
     /**
      * This is the element map. It contains a list of XML elements (in clark
      * notation) as keys and PHP class names as values.
@@ -59,30 +61,26 @@ class Service {
     public $classMap = [];
 
     /**
-     * Returns a fresh XML Reader
-     *
-     * @return Reader
+     * Returns a fresh XML Reader.
      */
-    function getReader() {
-
+    public function getReader(): Reader
+    {
         $r = new Reader();
         $r->elementMap = $this->elementMap;
-        return $r;
 
+        return $r;
     }
 
     /**
-     * Returns a fresh xml writer
-     *
-     * @return Writer
+     * Returns a fresh xml writer.
      */
-    function getWriter() {
-
+    public function getWriter(): Writer
+    {
         $w = new Writer();
         $w->namespaceMap = $this->namespaceMap;
         $w->classMap = $this->classMap;
-        return $w;
 
+        return $w;
     }
 
     /**
@@ -99,17 +97,22 @@ class Service {
      * with the root element name of the document.
      *
      * @param string|resource $input
-     * @param string|null $contextUri
-     * @param string|null $rootElementName
+     *
      * @throws ParseException
+     *
      * @return array|object|string
      */
-    function parse($input, $contextUri = null, &$rootElementName = null) {
-
+    public function parse($input, string $contextUri = null, string &$rootElementName = null)
+    {
         if (is_resource($input)) {
             // Unfortunately the XMLReader doesn't support streams. When it
             // does, we can optimize this.
             $input = stream_get_contents($input);
+
+            // If input is an empty string, then its safe to throw exception
+            if ('' === $input) {
+                throw new ParseException('The input element to parse is empty. Do not attempt to parse');
+            }
         }
         $r = $this->getReader();
         $r->contextUri = $contextUri;
@@ -117,8 +120,8 @@ class Service {
 
         $result = $r->parse();
         $rootElementName = $result['name'];
-        return $result['value'];
 
+        return $result['value'];
     }
 
     /**
@@ -137,33 +140,42 @@ class Service {
      *
      * @param string|string[] $rootElementName
      * @param string|resource $input
-     * @param string|null $contextUri
+     * @param string|null     $contextUri
+     *
      * @throws ParseException
+     *
      * @return array|object|string
      */
-    function expect($rootElementName, $input, $contextUri = null) {
-
+    public function expect($rootElementName, $input, string $contextUri = null)
+    {
         if (is_resource($input)) {
             // Unfortunately the XMLReader doesn't support streams. When it
             // does, we can optimize this.
             $input = stream_get_contents($input);
+
+            // If input is empty string, then its safe to throw exception
+            if ('' === $input) {
+                throw new ParseException('The input element to parse is empty. Do not attempt to parse');
+            }
         }
         $r = $this->getReader();
         $r->contextUri = $contextUri;
         $r->xml($input);
 
-        $rootElementName = (array)$rootElementName;
+        $rootElementName = (array) $rootElementName;
 
         foreach ($rootElementName as &$rEl) {
-            if ($rEl[0] !== '{') $rEl = '{}' . $rEl;
+            if ('{' !== $rEl[0]) {
+                $rEl = '{}'.$rEl;
+            }
         }
 
         $result = $r->parse();
         if (!in_array($result['name'], $rootElementName, true)) {
-            throw new ParseException('Expected ' . implode(' or ', (array)$rootElementName) . ' but received ' . $result['name'] . ' as the root element');
+            throw new ParseException('Expected '.implode(' or ', (array) $rootElementName).' but received '.$result['name'].' as the root element');
         }
-        return $result['value'];
 
+        return $result['value'];
     }
 
     /**
@@ -180,20 +192,20 @@ class Service {
      * This allows an implementor to easily create URI's relative to the root
      * of the domain.
      *
-     * @param string $rootElementName
      * @param string|array|XmlSerializable $value
-     * @param string|null $contextUri
+     *
+     * @return string
      */
-    function write($rootElementName, $value, $contextUri = null) {
-
+    public function write(string $rootElementName, $value, string $contextUri = null)
+    {
         $w = $this->getWriter();
         $w->openMemory();
         $w->contextUri = $contextUri;
         $w->setIndent(true);
         $w->startDocument();
         $w->writeElement($rootElementName, $value);
-        return $w->outputMemory();
 
+        return $w->outputMemory();
     }
 
     /**
@@ -219,18 +231,15 @@ class Service {
      * These can easily be mapped by calling:
      *
      * $service->mapValueObject('{http://example.org}author', 'Author');
-     *
-     * @param string $elementName
-     * @param object $className
-     * @return void
      */
-    function mapValueObject($elementName, $className) {
+    public function mapValueObject(string $elementName, string $className)
+    {
         list($namespace) = self::parseClarkNotation($elementName);
 
-        $this->elementMap[$elementName] = function(Reader $reader) use ($className, $namespace) {
+        $this->elementMap[$elementName] = function (Reader $reader) use ($className, $namespace) {
             return \Sabre\Xml\Deserializer\valueObject($reader, $className, $namespace);
         };
-        $this->classMap[$className] = function(Writer $writer, $valueObject) use ($namespace) {
+        $this->classMap[$className] = function (Writer $writer, $valueObject) use ($namespace) {
             return \Sabre\Xml\Serializer\valueObject($writer, $valueObject, $namespace);
         };
         $this->valueObjectMap[$className] = $elementName;
@@ -246,20 +255,20 @@ class Service {
      * mapValueObject().
      *
      * @param object $object
-     * @param string $contextUri
-     * @return void
+     *
+     * @throws \InvalidArgumentException
      */
-    function writeValueObject($object, $contextUri = null) {
-
+    public function writeValueObject($object, string $contextUri = null)
+    {
         if (!isset($this->valueObjectMap[get_class($object)])) {
-            throw new \InvalidArgumentException('"' . get_class($object) . '" is not a registered value object class. Register your class with mapValueObject.');
+            throw new \InvalidArgumentException('"'.get_class($object).'" is not a registered value object class. Register your class with mapValueObject.');
         }
+
         return $this->write(
             $this->valueObjectMap[get_class($object)],
             $object,
             $contextUri
         );
-
     }
 
     /**
@@ -268,22 +277,20 @@ class Service {
      *
      * If the string was invalid, it will throw an InvalidArgumentException.
      *
-     * @param string $str
-     * @throws InvalidArgumentException
-     * @return array
+     * @throws \InvalidArgumentException
      */
-    static function parseClarkNotation($str) {
+    public static function parseClarkNotation(string $str): array
+    {
         static $cache = [];
 
         if (!isset($cache[$str])) {
-
             if (!preg_match('/^{([^}]*)}(.*)$/', $str, $matches)) {
-                throw new \InvalidArgumentException('\'' . $str . '\' is not a valid clark-notation formatted string');
+                throw new \InvalidArgumentException('\''.$str.'\' is not a valid clark-notation formatted string');
             }
 
             $cache[$str] = [
                 $matches[1],
-                $matches[2]
+                $matches[2],
             ];
         }
 
@@ -294,5 +301,4 @@ class Service {
      * A list of classes and which XML elements they map to.
      */
     protected $valueObjectMap = [];
-
 }
diff --git a/vendor/sabre/xml/lib/Version.php b/vendor/sabre/xml/lib/Version.php
index 7edb40d67..65706ec42 100644
--- a/vendor/sabre/xml/lib/Version.php
+++ b/vendor/sabre/xml/lib/Version.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 /**
@@ -9,11 +11,10 @@ namespace Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/
  */
-class Version {
-
+class Version
+{
     /**
-     * Full version number
+     * Full version number.
      */
-    const VERSION = '1.5.0';
-
+    const VERSION = '2.1.1';
 }
diff --git a/vendor/sabre/xml/lib/Writer.php b/vendor/sabre/xml/lib/Writer.php
index 09d4cb321..f5957bbce 100644
--- a/vendor/sabre/xml/lib/Writer.php
+++ b/vendor/sabre/xml/lib/Writer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 use XMLWriter;
@@ -28,8 +30,8 @@ use XMLWriter;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Writer extends XMLWriter {
-
+class Writer extends XMLWriter
+{
     use ContextStackTrait;
 
     /**
@@ -93,12 +95,10 @@ class Writer extends XMLWriter {
      * ]
      *
      * @param mixed $value
-     * @return void
      */
-    function write($value) {
-
+    public function write($value)
+    {
         Serializer\standardSerializer($this, $value);
-
     }
 
     /**
@@ -115,52 +115,48 @@ class Writer extends XMLWriter {
      *
      *     <entry xmlns="http://w3.org/2005/Atom">
      *
+     * Note: this function doesn't have the string typehint, because PHP's
+     * XMLWriter::startElement doesn't either.
+     *
      * @param string $name
-     * @return bool
      */
-    function startElement($name) {
-
-        if ($name[0] === '{') {
-
+    public function startElement($name): bool
+    {
+        if ('{' === $name[0]) {
             list($namespace, $localName) =
                 Service::parseClarkNotation($name);
 
             if (array_key_exists($namespace, $this->namespaceMap)) {
                 $result = $this->startElementNS(
-                    $this->namespaceMap[$namespace] === '' ? null : $this->namespaceMap[$namespace],
+                    '' === $this->namespaceMap[$namespace] ? null : $this->namespaceMap[$namespace],
                     $localName,
                     null
                 );
             } else {
-
                 // An empty namespace means it's the global namespace. This is
                 // allowed, but it mustn't get a prefix.
-                if ($namespace === "" || $namespace === null) {
+                if ('' === $namespace || null === $namespace) {
                     $result = $this->startElement($localName);
                     $this->writeAttribute('xmlns', '');
                 } else {
                     if (!isset($this->adhocNamespaces[$namespace])) {
-                        $this->adhocNamespaces[$namespace] = 'x' . (count($this->adhocNamespaces) + 1);
+                        $this->adhocNamespaces[$namespace] = 'x'.(count($this->adhocNamespaces) + 1);
                     }
                     $result = $this->startElementNS($this->adhocNamespaces[$namespace], $localName, $namespace);
                 }
             }
-
         } else {
             $result = parent::startElement($name);
         }
 
         if (!$this->namespacesWritten) {
-
             foreach ($this->namespaceMap as $namespace => $prefix) {
-                $this->writeAttribute(($prefix ? 'xmlns:' . $prefix : 'xmlns'), $namespace);
+                $this->writeAttribute(($prefix ? 'xmlns:'.$prefix : 'xmlns'), $namespace);
             }
             $this->namespacesWritten = true;
-
         }
 
         return $result;
-
     }
 
     /**
@@ -182,18 +178,22 @@ class Writer extends XMLWriter {
      *    becomes:
      *    <author xmlns="http://www.w3.org/2005" /><name>Evert Pot</name></author>
      *
-     * @param string $name
-     * @param string $content
+     * Note: this function doesn't have the string typehint, because PHP's
+     * XMLWriter::startElement doesn't either.
+     *
+     * @param array|string|object|null $content
+     *
      * @return bool
      */
-    function writeElement($name, $content = null) {
-
+    public function writeElement($name, $content = null): bool
+    {
         $this->startElement($name);
         if (!is_null($content)) {
             $this->write($content);
         }
         $this->endElement();
 
+        return true;
     }
 
     /**
@@ -204,16 +204,12 @@ class Writer extends XMLWriter {
      * The key is an attribute name. If the key is a 'localName', the current
      * xml namespace is assumed. If it's a 'clark notation key', this namespace
      * will be used instead.
-     *
-     * @param array $attributes
-     * @return void
      */
-    function writeAttributes(array $attributes) {
-
+    public function writeAttributes(array $attributes)
+    {
         foreach ($attributes as $name => $value) {
             $this->writeAttribute($name, $value);
         }
-
     }
 
     /**
@@ -223,44 +219,41 @@ class Writer extends XMLWriter {
      *
      * Returns true when successful.
      *
+     * Note: this function doesn't have typehints, because for some reason
+     * PHP's XMLWriter::writeAttribute doesn't either.
+     *
      * @param string $name
      * @param string $value
-     * @return bool
      */
-    function writeAttribute($name, $value) {
-
-        if ($name[0] === '{') {
-
-            list(
-                $namespace,
-                $localName
-            ) = Service::parseClarkNotation($name);
-
-            if (array_key_exists($namespace, $this->namespaceMap)) {
-                // It's an attribute with a namespace we know
-                $this->writeAttribute(
-                    $this->namespaceMap[$namespace] . ':' . $localName,
-                    $value
-                );
-            } else {
-
-                // We don't know the namespace, we must add it in-line
-                if (!isset($this->adhocNamespaces[$namespace])) {
-                    $this->adhocNamespaces[$namespace] = 'x' . (count($this->adhocNamespaces) + 1);
-                }
-                $this->writeAttributeNS(
-                    $this->adhocNamespaces[$namespace],
-                    $localName,
-                    $namespace,
-                    $value
-                );
+    public function writeAttribute($name, $value): bool
+    {
+        if ('{' !== $name[0]) {
+            return parent::writeAttribute($name, $value);
+        }
 
-            }
+        list(
+            $namespace,
+            $localName
+        ) = Service::parseClarkNotation($name);
+
+        if (array_key_exists($namespace, $this->namespaceMap)) {
+            // It's an attribute with a namespace we know
+            return $this->writeAttribute(
+                $this->namespaceMap[$namespace].':'.$localName,
+                $value
+            );
+        }
 
-        } else {
-            return parent::writeAttribute($name, $value);
+        // We don't know the namespace, we must add it in-line
+        if (!isset($this->adhocNamespaces[$namespace])) {
+            $this->adhocNamespaces[$namespace] = 'x'.(count($this->adhocNamespaces) + 1);
         }
 
+        return $this->writeAttributeNS(
+            $this->adhocNamespaces[$namespace],
+            $localName,
+            $namespace,
+            $value
+        );
     }
-
 }
diff --git a/vendor/sabre/xml/lib/XmlDeserializable.php b/vendor/sabre/xml/lib/XmlDeserializable.php
index fa857e82c..83f33db1e 100644
--- a/vendor/sabre/xml/lib/XmlDeserializable.php
+++ b/vendor/sabre/xml/lib/XmlDeserializable.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 /**
@@ -10,8 +12,8 @@ namespace Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface XmlDeserializable {
-
+interface XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -30,9 +32,7 @@ interface XmlDeserializable {
      * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
      * the next element.
      *
-     * @param Reader $reader
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader);
-
+    public static function xmlDeserialize(Reader $reader);
 }
diff --git a/vendor/sabre/xml/lib/XmlSerializable.php b/vendor/sabre/xml/lib/XmlSerializable.php
index 3e2c528b9..b22f8d5e8 100644
--- a/vendor/sabre/xml/lib/XmlSerializable.php
+++ b/vendor/sabre/xml/lib/XmlSerializable.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\Xml;
 
 /**
@@ -10,8 +12,8 @@ namespace Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface XmlSerializable {
-
+interface XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -27,10 +29,6 @@ interface XmlSerializable {
      * This allows serializers to be re-used for different element names.
      *
      * If you are opening new elements, you must also close them again.
-     *
-     * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer);
-
+    public function xmlSerialize(Writer $writer);
 }