update composer libs

91 files changed, 2854 insertions, 3743 deletions

diff --git a/vendor/sabre/vobject/.gitignore b/vendor/sabre/vobject/.gitignore
index 95935f798..f08b31359 100644
--- a/vendor/sabre/vobject/.gitignore
+++ b/vendor/sabre/vobject/.gitignore
@@ -16,6 +16,7 @@ bin/hoa
 
 # Development stuff
 testdata/
+.php_cs.cache
 
 # OS X
 .DS_Store
diff --git a/vendor/sabre/vobject/.travis.yml b/vendor/sabre/vobject/.travis.yml
index 531ad5be4..2619562ab 100644
--- a/vendor/sabre/vobject/.travis.yml
+++ b/vendor/sabre/vobject/.travis.yml
@@ -1,20 +1,39 @@
 language: php
+sudo: required
 php:
   - 5.5
   - 5.6
   - 7.0
   - 7.1
   - 7.2
+  - 7.3
 
-sudo: false
+env:
+  global:
+    - RUN_PHPSTAN="FALSE"
 
-script:
-  - ./bin/phpunit --configuration tests/phpunit.xml
-  - ./bin/sabre-cs-fixer fix . --dry-run --diff
+matrix:
+  include:
+    - name: 'PHPStan'
+      php: 7.2
+      env: RUN_PHPSTAN="TRUE"
+  fast_finish: true
+  allow_failures:
+    - php: 5.5
+
+install:
+  - if [ $RUN_PHPSTAN == "TRUE"  ]; then wget https://github.com/phpstan/phpstan/releases/download/0.10.3/phpstan.phar; fi
 
 before_script:
   - composer install
 
+script:
+  - if [ $RUN_PHPSTAN == "FALSE"  ]; then ./bin/phpunit --configuration tests/phpunit.xml --coverage-clover=coverage.xml; 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:
     - $HOME/.composer/cache
diff --git a/vendor/sabre/vobject/CHANGELOG.md b/vendor/sabre/vobject/CHANGELOG.md
index 6cfec988e..7a2c935fb 100644
--- a/vendor/sabre/vobject/CHANGELOG.md
+++ b/vendor/sabre/vobject/CHANGELOG.md
@@ -1,6 +1,19 @@
 ChangeLog
 =========
 
+4.2.0 (2019-02-19)
+------------------
+
+* #432: DTSTAMP must be specified in UTC
+* #435: ORGANIZER e-mail address are case-insensitive
+* #441: Repairing BASE64 encoded vCard version 3
+
+4.2.0-alpha1 (2018-09-26)
+-------------------------
+
+* #412: Broker: add timezone to CANCEL messages
+* #424: Support php7.3
+
 4.1.6 (2018-04-20)
 ------------------
 
@@ -29,7 +42,7 @@ ChangeLog
 
 * #363: Repair script and de-duplicate properties that are only allowed once,
   but appear more than once. (@ddolcimascolo).
-* #377: Addes Pacific Time (US & Canada) as exchange timezone
+* #377: Added Pacific Time (US & Canada) as exchange timezone
 * #384: Added fallback for VCards without `FN`
 
 
diff --git a/vendor/sabre/vobject/bin/bench.php b/vendor/sabre/vobject/bin/bench.php
index 807b40777..0a2736fa6 100644
--- a/vendor/sabre/vobject/bin/bench.php
+++ b/vendor/sabre/vobject/bin/bench.php
@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-include __DIR__ . '/../vendor/autoload.php';
+include __DIR__.'/../vendor/autoload.php';
 
 $data = stream_get_contents(STDIN);
 
@@ -9,4 +9,4 @@ $start = microtime(true);
 
 $lol = Sabre\VObject\Reader::read($data);
 
-echo "time: " . (microtime(true) - $start) . "\n";
+echo 'time: '.(microtime(true) - $start)."\n";
diff --git a/vendor/sabre/vobject/bin/bench_freebusygenerator.php b/vendor/sabre/vobject/bin/bench_freebusygenerator.php
index 2c51b2a32..1299c14fb 100644
--- a/vendor/sabre/vobject/bin/bench_freebusygenerator.php
+++ b/vendor/sabre/vobject/bin/bench_freebusygenerator.php
@@ -1,16 +1,16 @@
 <?php
 
-include __DIR__ . '/../vendor/autoload.php';
+include __DIR__.'/../vendor/autoload.php';
 
 if ($argc < 2) {
-    echo "sabre/vobject ", Sabre\VObject\Version::VERSION, " freebusy benchmark\n";
+    echo 'sabre/vobject ', Sabre\VObject\Version::VERSION, " freebusy benchmark\n";
     echo "\n";
     echo "This script can be used to measure the speed of generating a\n";
     echo "free-busy report based on a calendar.\n";
     echo "\n";
     echo "The process will be repeated 100 times to get accurate stats\n";
     echo "\n";
-    echo "Usage: " . $argv[0] . " inputfile.ics\n";
+    echo 'Usage: '.$argv[0]." inputfile.ics\n";
     die();
 }
 
@@ -30,33 +30,24 @@ $timeZone = new \DateTimeZone('America/Toronto');
 
 $bench->fb->start();
 
-for ($i = 0; $i < $repeat; $i++) {
-
+for ($i = 0; $i < $repeat; ++$i) {
     $fb = new Sabre\VObject\FreeBusyGenerator($start, $end, $vcal, $timeZone);
     $results = $fb->getResult();
-
 }
 $bench->fb->stop();
 
-
-
 echo $bench,"\n";
 
-function formatMemory($input) {
-
+function formatMemory($input)
+{
     if (strlen($input) > 6) {
-
-        return round($input / (1024 * 1024)) . 'M';
-
+        return round($input / (1024 * 1024)).'M';
     } elseif (strlen($input) > 3) {
-
-        return round($input / 1024) . 'K';
-
+        return round($input / 1024).'K';
     }
-
 }
 
 unset($input, $splitter);
 
-echo "peak memory usage: " . formatMemory(memory_get_peak_usage()), "\n";
-echo "current memory usage: " . formatMemory(memory_get_usage()), "\n";
+echo 'peak memory usage: '.formatMemory(memory_get_peak_usage()), "\n";
+echo 'current memory usage: '.formatMemory(memory_get_usage()), "\n";
diff --git a/vendor/sabre/vobject/bin/bench_manipulatevcard.php b/vendor/sabre/vobject/bin/bench_manipulatevcard.php
index adc198e9b..f229091db 100644
--- a/vendor/sabre/vobject/bin/bench_manipulatevcard.php
+++ b/vendor/sabre/vobject/bin/bench_manipulatevcard.php
@@ -1,15 +1,15 @@
 <?php
 
-include __DIR__ . '/../vendor/autoload.php';
+include __DIR__.'/../vendor/autoload.php';
 
 if ($argc < 2) {
-    echo "sabre/vobject ", Sabre\VObject\Version::VERSION, " manipulation benchmark\n";
+    echo 'sabre/vobject ', Sabre\VObject\Version::VERSION, " manipulation benchmark\n";
     echo "\n";
     echo "This script can be used to measure the speed of opening a large amount of\n";
     echo "vcards, making a few alterations and serializing them again.\n";
-    echo "system.";
+    echo 'system.';
     echo "\n";
-    echo "Usage: " . $argv[0] . " inputfile.vcf\n";
+    echo 'Usage: '.$argv[0]." inputfile.vcf\n";
     die();
 }
 
@@ -22,18 +22,21 @@ $splitter = new Sabre\VObject\Splitter\VCard($input);
 $bench = new Hoa\Bench\Bench();
 
 while (true) {
-
     $bench->parse->start();
     $vcard = $splitter->getNext();
     $bench->parse->pause();
 
-    if (!$vcard) break;
+    if (!$vcard) {
+        break;
+    }
 
     $bench->manipulate->start();
     $vcard->{'X-FOO'} = 'Random new value!';
     $emails = [];
-    if (isset($vcard->EMAIL)) foreach ($vcard->EMAIL as $email) {
-        $emails[] = (string)$email;
+    if (isset($vcard->EMAIL)) {
+        foreach ($vcard->EMAIL as $email) {
+            $emails[] = (string) $email;
+        }
     }
     $bench->manipulate->pause();
 
@@ -42,28 +45,20 @@ while (true) {
     $bench->serialize->pause();
 
     $vcard->destroy();
-
 }
 
-
-
 echo $bench,"\n";
 
-function formatMemory($input) {
-
+function formatMemory($input)
+{
     if (strlen($input) > 6) {
-
-        return round($input / (1024 * 1024)) . 'M';
-
+        return round($input / (1024 * 1024)).'M';
     } elseif (strlen($input) > 3) {
-
-        return round($input / 1024) . 'K';
-
+        return round($input / 1024).'K';
     }
-
 }
 
 unset($input, $splitter);
 
-echo "peak memory usage: " . formatMemory(memory_get_peak_usage()), "\n";
-echo "current memory usage: " . formatMemory(memory_get_usage()), "\n";
+echo 'peak memory usage: '.formatMemory(memory_get_peak_usage()), "\n";
+echo 'current memory usage: '.formatMemory(memory_get_usage()), "\n";
diff --git a/vendor/sabre/vobject/bin/fetch_windows_zones.php b/vendor/sabre/vobject/bin/fetch_windows_zones.php
index 3f2a00f7a..9c4e51abd 100644
--- a/vendor/sabre/vobject/bin/fetch_windows_zones.php
+++ b/vendor/sabre/vobject/bin/fetch_windows_zones.php
@@ -2,9 +2,9 @@
 <?php
 
 $windowsZonesUrl = 'http://unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml';
-$outputFile = __DIR__ . '/../lib/timezonedata/windowszones.php';
+$outputFile = __DIR__.'/../lib/timezonedata/windowszones.php';
 
-echo "Fetching timezone map from: " . $windowsZonesUrl, "\n";
+echo 'Fetching timezone map from: '.$windowsZonesUrl, "\n";
 
 $data = file_get_contents($windowsZonesUrl);
 
@@ -13,16 +13,14 @@ $xml = simplexml_load_string($data);
 $map = [];
 
 foreach ($xml->xpath('//mapZone') as $mapZone) {
-
-    $from = (string)$mapZone['other'];
-    $to = (string)$mapZone['type'];
+    $from = (string) $mapZone['other'];
+    $to = (string) $mapZone['type'];
 
     list($to) = explode(' ', $to, 2);
 
     if (!isset($map[$from])) {
         $map[$from] = $to;
     }
-
 }
 
 ksort($map);
@@ -33,19 +31,19 @@ fwrite($f, "<?php\n\n");
 fwrite($f, "/**\n");
 fwrite($f, " * Automatically generated timezone file\n");
 fwrite($f, " *\n");
-fwrite($f, " * Last update: " . date(DATE_W3C) . "\n");
-fwrite($f, " * Source: " . $windowsZonesUrl . "\n");
+fwrite($f, ' * Last update: '.date(DATE_W3C)."\n");
+fwrite($f, ' * Source: '.$windowsZonesUrl."\n");
 fwrite($f, " *\n");
 fwrite($f, " * @copyright Copyright (C) fruux GmbH (https://fruux.com/).\n");
 fwrite($f, " * @license http://sabre.io/license/ Modified BSD License\n");
 fwrite($f, " */\n");
 fwrite($f, "\n");
-fwrite($f, "return ");
-fwrite($f, var_export($map, true) . ';');
+fwrite($f, 'return ');
+fwrite($f, var_export($map, true).';');
 fclose($f);
 
 echo "Formatting\n";
 
-exec(__DIR__ . '/sabre-cs-fixer fix ' . escapeshellarg($outputFile));
+exec(__DIR__.'/sabre-cs-fixer fix '.escapeshellarg($outputFile));
 
 echo "Done\n";
diff --git a/vendor/sabre/vobject/bin/generateicalendardata.php b/vendor/sabre/vobject/bin/generateicalendardata.php
index a2df3c63a..62b6107c5 100644
--- a/vendor/sabre/vobject/bin/generateicalendardata.php
+++ b/vendor/sabre/vobject/bin/generateicalendardata.php
@@ -23,54 +23,53 @@ HI
 
 $events = 100;
 
-if (isset($argv[1])) $events = (int)$argv[1];
+if (isset($argv[1])) {
+    $events = (int) $argv[1];
+}
 
-include __DIR__ . '/../vendor/autoload.php';
+include __DIR__.'/../vendor/autoload.php';
 
-fwrite(STDERR, "Generating " . $events . " events\n");
+fwrite(STDERR, 'Generating '.$events." events\n");
 
-$currentDate = new DateTime('-' . round($events / 2) . ' days');
+$currentDate = new DateTime('-'.round($events / 2).' days');
 
 $calendar = new VObject\Component\VCalendar();
 
 $ii = 0;
 
 while ($ii < $events) {
-
-    $ii++;
+    ++$ii;
 
     $event = $calendar->add('VEVENT');
     $event->DTSTART = 'bla';
-    $event->SUMMARY = 'Event #' . $ii;
+    $event->SUMMARY = 'Event #'.$ii;
     $event->UID = md5(microtime(true));
 
     $doctorRandom = mt_rand(1, 1000);
 
     switch ($doctorRandom) {
         // All-day event
-        case 1 :
+        case 1:
             $event->DTEND = 'bla';
             $dtStart = clone $currentDate;
             $dtEnd = clone $currentDate;
-            $dtEnd->modify('+' . mt_rand(1, 3) . ' days');
+            $dtEnd->modify('+'.mt_rand(1, 3).' days');
             $event->DTSTART->setDateTime($dtStart);
             $event->DTSTART['VALUE'] = 'DATE';
             $event->DTEND->setDateTime($dtEnd);
             break;
-        case 2 :
-            $event->RRULE = 'FREQ=DAILY;COUNT=' . mt_rand(1, 10);
-            // No break intentional
-        default :
+        case 2:
+            $event->RRULE = 'FREQ=DAILY;COUNT='.mt_rand(1, 10);
+            // no break intentional
+        default:
             $dtStart = clone $currentDate;
             $dtStart->setTime(mt_rand(1, 23), mt_rand(0, 59), mt_rand(0, 59));
             $event->DTSTART->setDateTime($dtStart);
-            $event->DURATION = 'PT' . mt_rand(1, 3) . 'H';
+            $event->DURATION = 'PT'.mt_rand(1, 3).'H';
             break;
-
     }
-    
-    $currentDate->modify('+ ' . mt_rand(0, 3) . ' days');
 
+    $currentDate->modify('+ '.mt_rand(0, 3).' days');
 }
 fwrite(STDERR, "Validating\n");
 
diff --git a/vendor/sabre/vobject/bin/mergeduplicates.php b/vendor/sabre/vobject/bin/mergeduplicates.php
index 076524d36..e6cde73dd 100644
--- a/vendor/sabre/vobject/bin/mergeduplicates.php
+++ b/vendor/sabre/vobject/bin/mergeduplicates.php
@@ -6,8 +6,8 @@ namespace Sabre\VObject;
 // This sucks.. we have to try to find the composer autoloader. But chances
 // are, we can't find it this way. So we'll do our bestest
 $paths = [
-    __DIR__ . '/../vendor/autoload.php',  // In case vobject is cloned directly
-    __DIR__ . '/../../../autoload.php',   // In case vobject is a composer dependency.
+    __DIR__.'/../vendor/autoload.php',  // In case vobject is cloned directly
+    __DIR__.'/../../../autoload.php',   // In case vobject is a composer dependency.
 ];
 
 foreach ($paths as $path) {
@@ -22,14 +22,12 @@ if (!class_exists('Sabre\\VObject\\Version')) {
     die(1);
 }
 
-echo "sabre/vobject ", Version::VERSION, " duplicate contact merge tool\n";
+echo 'sabre/vobject ', Version::VERSION, " duplicate contact merge tool\n";
 
 if ($argc < 3) {
-
     echo "\n";
-    echo "Usage: ", $argv[0], " input.vcf output.vcf [debug.log]\n";
+    echo 'Usage: ', $argv[0], " input.vcf output.vcf [debug.log]\n";
     die(1);
-
 }
 
 $input = fopen($argv[1], 'r');
@@ -42,83 +40,72 @@ $splitter = new Splitter\VCard($input);
 // but not in others, we don't consider them for the sake of finding
 // differences.
 $ignoredProperties = [
-    "PRODID",
-    "VERSION",
-    "REV",
-    "UID",
-    "X-ABLABEL",
+    'PRODID',
+    'VERSION',
+    'REV',
+    'UID',
+    'X-ABLABEL',
 ];
 
-
 $collectedNames = [];
 
 $stats = [
-    "Total vcards"       => 0,
-    "No FN property"     => 0,
-    "Ignored duplicates" => 0,
-    "Merged values"      => 0,
-    "Error"              => 0,
-    "Unique cards"       => 0,
-    "Total written"      => 0,
+    'Total vcards' => 0,
+    'No FN property' => 0,
+    'Ignored duplicates' => 0,
+    'Merged values' => 0,
+    'Error' => 0,
+    'Unique cards' => 0,
+    'Total written' => 0,
 ];
 
-function writeStats() {
-
+function writeStats()
+{
     global $stats;
     foreach ($stats as $name => $value) {
-        echo str_pad($name, 23, " ", STR_PAD_RIGHT), str_pad($value, 6, " ", STR_PAD_LEFT), "\n";
+        echo str_pad($name, 23, ' ', STR_PAD_RIGHT), str_pad($value, 6, ' ', STR_PAD_LEFT), "\n";
     }
     // Moving cursor back a few lines.
-    echo "\033[" . count($stats) . "A";
-
+    echo "\033[".count($stats).'A';
 }
 
-function write($vcard) {
-
+function write($vcard)
+{
     global $stats, $output;
 
-    $stats["Total written"]++;
-    fwrite($output, $vcard->serialize() . "\n");
-
+    ++$stats['Total written'];
+    fwrite($output, $vcard->serialize()."\n");
 }
 
 while ($vcard = $splitter->getNext()) {
-
-    $stats["Total vcards"]++;
+    ++$stats['Total vcards'];
     writeStats();
 
-    $fn = isset($vcard->FN) ? (string)$vcard->FN : null;
+    $fn = isset($vcard->FN) ? (string) $vcard->FN : null;
 
     if (empty($fn)) {
-
         // Immediately write this vcard, we don't compare it.
-        $stats["No FN property"]++;
-        $stats['Unique cards']++;
+        ++$stats['No FN property'];
+        ++$stats['Unique cards'];
         write($vcard);
         $vcard->destroy();
         continue;
-
     }
 
     if (!isset($collectedNames[$fn])) {
-
         $collectedNames[$fn] = $vcard;
-        $stats['Unique cards']++;
+        ++$stats['Unique cards'];
         continue;
-
     } else {
-
         // Starting comparison for all properties. We only check if properties
         // in the current vcard exactly appear in the earlier vcard as well.
         foreach ($vcard->children() as $newProp) {
-
             if (in_array($newProp->name, $ignoredProperties)) {
                 // We don't care about properties such as UID and REV.
                 continue;
             }
             $ok = false;
             foreach ($collectedNames[$fn]->select($newProp->name) as $compareProp) {
-
                 if ($compareProp->serialize() === $newProp->serialize()) {
                     $ok = true;
                     break;
@@ -126,14 +113,11 @@ while ($vcard = $splitter->getNext()) {
             }
 
             if (!$ok) {
-
-                if ($newProp->name === 'EMAIL' || $newProp->name === 'TEL') {
-
+                if ('EMAIL' === $newProp->name || 'TEL' === $newProp->name) {
                     // We're going to make another attempt to find this
                     // property, this time just by value. If we find it, we
                     // consider it a success.
                     foreach ($collectedNames[$fn]->select($newProp->name) as $compareProp) {
-
                         if ($compareProp->getValue() === $newProp->getValue()) {
                             $ok = true;
                             break;
@@ -141,44 +125,36 @@ while ($vcard = $splitter->getNext()) {
                     }
 
                     if (!$ok) {
-
                         // Merging the new value in the old vcard.
                         $collectedNames[$fn]->add(clone $newProp);
                         $ok = true;
-                        $stats['Merged values']++;
-
+                        ++$stats['Merged values'];
                     }
-
                 }
-
             }
 
             if (!$ok) {
-
                 // echo $newProp->serialize() . " does not appear in earlier vcard!\n";
-                $stats['Error']++;
-                if ($debug) fwrite($debug, "Missing '" . $newProp->name . "' property in duplicate. Earlier vcard:\n" . $collectedNames[$fn]->serialize() . "\n\nLater:\n" . $vcard->serialize() . "\n\n");
-                
+                ++$stats['Error'];
+                if ($debug) {
+                    fwrite($debug, "Missing '".$newProp->name."' property in duplicate. Earlier vcard:\n".$collectedNames[$fn]->serialize()."\n\nLater:\n".$vcard->serialize()."\n\n");
+                }
+
                 $vcard->destroy();
                 continue 2;
             }
-
         }
-
     }
 
     $vcard->destroy();
-    $stats['Ignored duplicates']++;
-
+    ++$stats['Ignored duplicates'];
 }
 
 foreach ($collectedNames as $vcard) {
-
     // Overwriting any old PRODID
-    $vcard->PRODID = '-//Sabre//Sabre VObject ' . Version::VERSION . '//EN';
+    $vcard->PRODID = '-//Sabre//Sabre VObject '.Version::VERSION.'//EN';
     write($vcard);
     writeStats();
-
 }
 
 echo str_repeat("\n", count($stats)), "\nDone.\n";
diff --git a/vendor/sabre/vobject/bin/rrulebench.php b/vendor/sabre/vobject/bin/rrulebench.php
index af26b4765..583da574c 100644
--- a/vendor/sabre/vobject/bin/rrulebench.php
+++ b/vendor/sabre/vobject/bin/rrulebench.php
@@ -1,14 +1,14 @@
 <?php
 
-include __DIR__ . '/../vendor/autoload.php';
+include __DIR__.'/../vendor/autoload.php';
 
 if ($argc < 4) {
-    echo "sabre/vobject ", Sabre\VObject\Version::VERSION, " RRULE benchmark\n";
+    echo 'sabre/vobject ', Sabre\VObject\Version::VERSION, " RRULE benchmark\n";
     echo "\n";
     echo "This script can be used to measure the speed of the 'recurrence expansion'\n";
-    echo "system.";
+    echo 'system.';
     echo "\n";
-    echo "Usage: " . $argv[0] . " inputfile.ics startdate enddate\n";
+    echo 'Usage: '.$argv[0]." inputfile.ics startdate enddate\n";
     die();
 }
 
diff --git a/vendor/sabre/vobject/composer.json b/vendor/sabre/vobject/composer.json
index 2407cabb1..ad026879e 100644
--- a/vendor/sabre/vobject/composer.json
+++ b/vendor/sabre/vobject/composer.json
@@ -37,9 +37,7 @@
         "sabre/xml"    : ">=1.5 <3.0"
     },
     "require-dev" : {
-        "phpunit/phpunit" : "> 4.8.35, <6.0.0",
-        "sabre/cs"        : "^1.0.0"
-
+        "phpunit/phpunit" : "> 4.8.35, <6.0.0"
     },
     "suggest" : {
         "hoa/bench"       : "If you would like to run the benchmark scripts"
diff --git a/vendor/sabre/vobject/lib/BirthdayCalendarGenerator.php b/vendor/sabre/vobject/lib/BirthdayCalendarGenerator.php
index 553912249..fade50e16 100644
--- a/vendor/sabre/vobject/lib/BirthdayCalendarGenerator.php
+++ b/vendor/sabre/vobject/lib/BirthdayCalendarGenerator.php
@@ -11,8 +11,8 @@ use Sabre\VObject\Component\VCalendar;
  * @author Dominik Tobschall (http://tobschall.de/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class BirthdayCalendarGenerator {
-
+class BirthdayCalendarGenerator
+{
     /**
      * Input objects.
      *
@@ -41,12 +41,11 @@ class BirthdayCalendarGenerator {
      *
      * @param mixed $objects
      */
-    function __construct($objects = null) {
-
+    public function __construct($objects = null)
+    {
         if ($objects) {
             $this->setObjects($objects);
         }
-
     }
 
     /**
@@ -56,52 +55,38 @@ class BirthdayCalendarGenerator {
      * It's also possible to supply an array of strings or objects.
      *
      * @param mixed $objects
-     *
-     * @return void
      */
-    function setObjects($objects) {
-
+    public function setObjects($objects)
+    {
         if (!is_array($objects)) {
             $objects = [$objects];
         }
 
         $this->objects = [];
         foreach ($objects as $object) {
-
             if (is_string($object)) {
-
                 $vObj = Reader::read($object);
                 if (!$vObj instanceof Component\VCard) {
                     throw new \InvalidArgumentException('String could not be parsed as \\Sabre\\VObject\\Component\\VCard by setObjects');
                 }
 
                 $this->objects[] = $vObj;
-
             } elseif ($object instanceof Component\VCard) {
-
                 $this->objects[] = $object;
-
             } else {
-
                 throw new \InvalidArgumentException('You can only pass strings or \\Sabre\\VObject\\Component\\VCard arguments to setObjects');
-
             }
-
         }
-
     }
 
     /**
-     * Sets the output format for the SUMMARY
+     * Sets the output format for the SUMMARY.
      *
      * @param string $format
-     *
-     * @return void
      */
-    function setFormat($format) {
-
+    public function setFormat($format)
+    {
         $this->format = $format;
-
     }
 
     /**
@@ -109,12 +94,11 @@ class BirthdayCalendarGenerator {
      *
      * @return Component/VCalendar
      */
-    function getResult() {
-
+    public function getResult()
+    {
         $calendar = new VCalendar();
 
         foreach ($this->objects as $object) {
-
             // Skip if there is no BDAY property.
             if (!$object->select('BDAY')) {
                 continue;
@@ -152,7 +136,7 @@ class BirthdayCalendarGenerator {
             $unknownYear = false;
 
             if (!$dateParts['year']) {
-                $object->BDAY = self::DEFAULT_YEAR . '-' . $dateParts['month'] . '-' . $dateParts['date'];
+                $object->BDAY = self::DEFAULT_YEAR.'-'.$dateParts['month'].'-'.$dateParts['date'];
 
                 $unknownYear = true;
             }
@@ -161,8 +145,8 @@ class BirthdayCalendarGenerator {
             $event = $calendar->add('VEVENT', [
                 'SUMMARY' => sprintf($this->format, $object->FN->getValue()),
                 'DTSTART' => new \DateTime($object->BDAY->getValue()),
-                'RRULE'   => 'FREQ=YEARLY',
-                'TRANSP'  => 'TRANSPARENT',
+                'RRULE' => 'FREQ=YEARLY',
+                'TRANSP' => 'TRANSPARENT',
             ]);
 
             // add VALUE=date
@@ -172,20 +156,17 @@ class BirthdayCalendarGenerator {
             if ($unknownYear) {
                 $event->add('X-SABRE-BDAY', 'BDAY', [
                     'X-SABRE-VCARD-UID' => $object->UID->getValue(),
-                    'X-SABRE-VCARD-FN'  => $object->FN->getValue(),
+                    'X-SABRE-VCARD-FN' => $object->FN->getValue(),
                     'X-SABRE-OMIT-YEAR' => self::DEFAULT_YEAR,
                 ]);
             } else {
                 $event->add('X-SABRE-BDAY', 'BDAY', [
                     'X-SABRE-VCARD-UID' => $object->UID->getValue(),
-                    'X-SABRE-VCARD-FN'  => $object->FN->getValue(),
+                    'X-SABRE-VCARD-FN' => $object->FN->getValue(),
                 ]);
             }
-
         }
 
         return $calendar;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Cli.php b/vendor/sabre/vobject/lib/Cli.php
index df7ac22f3..70b5e8d6e 100644
--- a/vendor/sabre/vobject/lib/Cli.php
+++ b/vendor/sabre/vobject/lib/Cli.php
@@ -12,8 +12,8 @@ use
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Cli {
-
+class Cli
+{
     /**
      * No output.
      *
@@ -96,8 +96,8 @@ class Cli {
      *
      * @return int
      */
-    function main(array $argv) {
-
+    public function main(array $argv)
+    {
         // @codeCoverageIgnoreStart
         // We cannot easily test this, so we'll skip it. Pretty basic anyway.
 
@@ -113,103 +113,96 @@ class Cli {
 
         // @codeCoverageIgnoreEnd
 
-
         try {
-
             list($options, $positional) = $this->parseArguments($argv);
 
             if (isset($options['q'])) {
                 $this->quiet = true;
             }
-            $this->log($this->colorize('green', "sabre/vobject ") . $this->colorize('yellow', Version::VERSION));
+            $this->log($this->colorize('green', 'sabre/vobject ').$this->colorize('yellow', Version::VERSION));
 
             foreach ($options as $name => $value) {
-
                 switch ($name) {
-
-                    case 'q' :
+                    case 'q':
                         // Already handled earlier.
                         break;
-                    case 'h' :
-                    case 'help' :
+                    case 'h':
+                    case 'help':
                         $this->showHelp();
+
                         return 0;
                         break;
-                    case 'format' :
+                    case 'format':
                         switch ($value) {
-
                             // jcard/jcal documents
-                            case 'jcard' :
-                            case 'jcal' :
+                            case 'jcard':
+                            case 'jcal':
 
                             // specific document versions
-                            case 'vcard21' :
-                            case 'vcard30' :
-                            case 'vcard40' :
-                            case 'icalendar20' :
+                            case 'vcard21':
+                            case 'vcard30':
+                            case 'vcard40':
+                            case 'icalendar20':
 
                             // specific formats
-                            case 'json' :
-                            case 'mimedir' :
+                            case 'json':
+                            case 'mimedir':
 
                             // icalendar/vcad
-                            case 'icalendar' :
-                            case 'vcard' :
+                            case 'icalendar':
+                            case 'vcard':
                                 $this->format = $value;
                                 break;
 
-                            default :
-                                throw new InvalidArgumentException('Unknown format: ' . $value);
-
+                            default:
+                                throw new InvalidArgumentException('Unknown format: '.$value);
                         }
                         break;
-                    case 'pretty' :
+                    case 'pretty':
                         if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
                             $this->pretty = true;
                         }
                         break;
-                    case 'forgiving' :
+                    case 'forgiving':
                         $this->forgiving = true;
                         break;
-                    case 'inputformat' :
+                    case 'inputformat':
                         switch ($value) {
                             // json formats
-                            case 'jcard' :
-                            case 'jcal' :
-                            case 'json' :
+                            case 'jcard':
+                            case 'jcal':
+                            case 'json':
                                 $this->inputFormat = 'json';
                                 break;
 
                             // mimedir formats
-                            case 'mimedir' :
-                            case 'icalendar' :
-                            case 'vcard' :
-                            case 'vcard21' :
-                            case 'vcard30' :
-                            case 'vcard40' :
-                            case 'icalendar20' :
+                            case 'mimedir':
+                            case 'icalendar':
+                            case 'vcard':
+                            case 'vcard21':
+                            case 'vcard30':
+                            case 'vcard40':
+                            case 'icalendar20':
 
                                 $this->inputFormat = 'mimedir';
                                 break;
 
-                            default :
-                                throw new InvalidArgumentException('Unknown format: ' . $value);
-
+                            default:
+                                throw new InvalidArgumentException('Unknown format: '.$value);
                         }
                         break;
-                    default :
-                        throw new InvalidArgumentException('Unknown option: ' . $name);
-
+                    default:
+                        throw new InvalidArgumentException('Unknown option: '.$name);
                 }
-
             }
 
-            if (count($positional) === 0) {
+            if (0 === count($positional)) {
                 $this->showHelp();
+
                 return 1;
             }
 
-            if (count($positional) === 1) {
+            if (1 === count($positional)) {
                 throw new InvalidArgumentException('Inputfile is a required argument');
             }
 
@@ -218,12 +211,12 @@ class Cli {
             }
 
             if (!in_array($positional[0], ['validate', 'repair', 'convert', 'color'])) {
-                throw new InvalidArgumentException('Uknown command: ' . $positional[0]);
+                throw new InvalidArgumentException('Uknown command: '.$positional[0]);
             }
-
         } catch (InvalidArgumentException $e) {
             $this->showHelp();
-            $this->log('Error: ' . $e->getMessage(), 'red');
+            $this->log('Error: '.$e->getMessage(), 'red');
+
             return 1;
         }
 
@@ -232,76 +225,71 @@ class Cli {
         $this->inputPath = $positional[1];
         $this->outputPath = isset($positional[2]) ? $positional[2] : '-';
 
-        if ($this->outputPath !== '-') {
+        if ('-' !== $this->outputPath) {
             $this->stdout = fopen($this->outputPath, 'w');
         }
 
         if (!$this->inputFormat) {
-            if (substr($this->inputPath, -5) === '.json') {
+            if ('.json' === substr($this->inputPath, -5)) {
                 $this->inputFormat = 'json';
             } else {
                 $this->inputFormat = 'mimedir';
             }
         }
         if (!$this->format) {
-            if (substr($this->outputPath, -5) === '.json') {
+            if ('.json' === substr($this->outputPath, -5)) {
                 $this->format = 'json';
             } else {
                 $this->format = 'mimedir';
             }
         }
 
-
         $realCode = 0;
 
         try {
-
             while ($input = $this->readInput()) {
-
                 $returnCode = $this->$command($input);
-                if ($returnCode !== 0) $realCode = $returnCode;
-
+                if (0 !== $returnCode) {
+                    $realCode = $returnCode;
+                }
             }
-
         } catch (EofException $e) {
             // end of file
         } catch (\Exception $e) {
-            $this->log('Error: ' . $e->getMessage(), 'red');
+            $this->log('Error: '.$e->getMessage(), 'red');
+
             return 2;
         }
 
         return $realCode;
-
     }
 
     /**
      * Shows the help message.
-     *
-     * @return void
      */
-    protected function showHelp() {
-
+    protected function showHelp()
+    {
         $this->log('Usage:', 'yellow');
-        $this->log("  vobject [options] command [arguments]");
+        $this->log('  vobject [options] command [arguments]');
         $this->log('');
         $this->log('Options:', 'yellow');
-        $this->log($this->colorize('green', '  -q            ') . "Don't output anything.");
-        $this->log($this->colorize('green', '  -help -h      ') . "Display this help message.");
-        $this->log($this->colorize('green', '  --format      ') . "Convert to a specific format. Must be one of: vcard, vcard21,");
-        $this->log($this->colorize('green', '  --forgiving   ') . "Makes the parser less strict.");
-        $this->log("                vcard30, vcard40, icalendar20, jcal, jcard, json, mimedir.");
-        $this->log($this->colorize('green', '  --inputformat ') . "If the input format cannot be guessed from the extension, it");
-        $this->log("                must be specified here.");
+        $this->log($this->colorize('green', '  -q            ')."Don't output anything.");
+        $this->log($this->colorize('green', '  -help -h      ').'Display this help message.');
+        $this->log($this->colorize('green', '  --format      ').'Convert to a specific format. Must be one of: vcard, vcard21,');
+        $this->log($this->colorize('green', '  --forgiving   ').'Makes the parser less strict.');
+        $this->log('                vcard30, vcard40, icalendar20, jcal, jcard, json, mimedir.');
+        $this->log($this->colorize('green', '  --inputformat ').'If the input format cannot be guessed from the extension, it');
+        $this->log('                must be specified here.');
         // Only PHP 5.4 and up
         if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
-            $this->log($this->colorize('green', '  --pretty      ') . "json pretty-print.");
+            $this->log($this->colorize('green', '  --pretty      ').'json pretty-print.');
         }
         $this->log('');
         $this->log('Commands:', 'yellow');
-        $this->log($this->colorize('green', '  validate') . ' source_file              Validates a file for correctness.');
-        $this->log($this->colorize('green', '  repair') . ' source_file [output_file]  Repairs a file.');
-        $this->log($this->colorize('green', '  convert') . ' source_file [output_file] Converts a file.');
-        $this->log($this->colorize('green', '  color') . ' source_file                 Colorize a file, useful for debbugging.');
+        $this->log($this->colorize('green', '  validate').' source_file              Validates a file for correctness.');
+        $this->log($this->colorize('green', '  repair').' source_file [output_file]  Repairs a file.');
+        $this->log($this->colorize('green', '  convert').' source_file [output_file] Converts a file.');
+        $this->log($this->colorize('green', '  color').' source_file                 Colorize a file, useful for debbugging.');
         $this->log(
         <<<HELP
 
@@ -319,7 +307,6 @@ HELP
         $this->log('   vobject color calendar.ics');
         $this->log('');
         $this->log('https://github.com/fruux/sabre-vobject', 'purple');
-
     }
 
     /**
@@ -329,24 +316,23 @@ HELP
      *
      * @return int
      */
-    protected function validate(Component $vObj) {
-
+    protected function validate(Component $vObj)
+    {
         $returnCode = 0;
 
         switch ($vObj->name) {
-            case 'VCALENDAR' :
-                $this->log("iCalendar: " . (string)$vObj->VERSION);
+            case 'VCALENDAR':
+                $this->log('iCalendar: '.(string) $vObj->VERSION);
                 break;
-            case 'VCARD' :
-                $this->log("vCard: " . (string)$vObj->VERSION);
+            case 'VCARD':
+                $this->log('vCard: '.(string) $vObj->VERSION);
                 break;
         }
 
         $warnings = $vObj->validate();
         if (!count($warnings)) {
-            $this->log("  No warnings!");
+            $this->log('  No warnings!');
         } else {
-
             $levels = [
                 1 => 'REPAIRED',
                 2 => 'WARNING',
@@ -354,19 +340,15 @@ HELP
             ];
             $returnCode = 2;
             foreach ($warnings as $warn) {
-
                 $extra = '';
                 if ($warn['node'] instanceof Property) {
-                    $extra = ' (property: "' . $warn['node']->name . '")';
+                    $extra = ' (property: "'.$warn['node']->name.'")';
                 }
-                $this->log("  [" . $levels[$warn['level']] . '] ' . $warn['message'] . $extra);
-
+                $this->log('  ['.$levels[$warn['level']].'] '.$warn['message'].$extra);
             }
-
         }
 
         return $returnCode;
-
     }
 
     /**
@@ -376,24 +358,23 @@ HELP
      *
      * @return int
      */
-    protected function repair(Component $vObj) {
-
+    protected function repair(Component $vObj)
+    {
         $returnCode = 0;
 
         switch ($vObj->name) {
-            case 'VCALENDAR' :
-                $this->log("iCalendar: " . (string)$vObj->VERSION);
+            case 'VCALENDAR':
+                $this->log('iCalendar: '.(string) $vObj->VERSION);
                 break;
-            case 'VCARD' :
-                $this->log("vCard: " . (string)$vObj->VERSION);
+            case 'VCARD':
+                $this->log('vCard: '.(string) $vObj->VERSION);
                 break;
         }
 
         $warnings = $vObj->validate(Node::REPAIR);
         if (!count($warnings)) {
-            $this->log("  No warnings!");
+            $this->log('  No warnings!');
         } else {
-
             $levels = [
                 1 => 'REPAIRED',
                 2 => 'WARNING',
@@ -401,20 +382,16 @@ HELP
             ];
             $returnCode = 2;
             foreach ($warnings as $warn) {
-
                 $extra = '';
                 if ($warn['node'] instanceof Property) {
-                    $extra = ' (property: "' . $warn['node']->name . '")';
+                    $extra = ' (property: "'.$warn['node']->name.'")';
                 }
-                $this->log("  [" . $levels[$warn['level']] . '] ' . $warn['message'] . $extra);
-
+                $this->log('  ['.$levels[$warn['level']].'] '.$warn['message'].$extra);
             }
-
         }
         fwrite($this->stdout, $vObj->serialize());
 
         return $returnCode;
-
     }
 
     /**
@@ -424,47 +401,46 @@ HELP
      *
      * @return int
      */
-    protected function convert($vObj) {
-
+    protected function convert($vObj)
+    {
         $json = false;
         $convertVersion = null;
         $forceInput = null;
 
         switch ($this->format) {
-            case 'json' :
+            case 'json':
                 $json = true;
-                if ($vObj->name === 'VCARD') {
+                if ('VCARD' === $vObj->name) {
                     $convertVersion = Document::VCARD40;
                 }
                 break;
-            case 'jcard' :
+            case 'jcard':
                 $json = true;
                 $forceInput = 'VCARD';
                 $convertVersion = Document::VCARD40;
                 break;
-            case 'jcal' :
+            case 'jcal':
                 $json = true;
                 $forceInput = 'VCALENDAR';
                 break;
-            case 'mimedir' :
-            case 'icalendar' :
-            case 'icalendar20' :
-            case 'vcard' :
+            case 'mimedir':
+            case 'icalendar':
+            case 'icalendar20':
+            case 'vcard':
                 break;
-            case 'vcard21' :
+            case 'vcard21':
                 $convertVersion = Document::VCARD21;
                 break;
-            case 'vcard30' :
+            case 'vcard30':
                 $convertVersion = Document::VCARD30;
                 break;
-            case 'vcard40' :
+            case 'vcard40':
                 $convertVersion = Document::VCARD40;
                 break;
-
         }
 
         if ($forceInput && $vObj->name !== $forceInput) {
-            throw new \Exception('You cannot convert a ' . strtolower($vObj->name) . ' to ' . $this->format);
+            throw new \Exception('You cannot convert a '.strtolower($vObj->name).' to '.$this->format);
         }
         if ($convertVersion) {
             $vObj = $vObj->convert($convertVersion);
@@ -480,7 +456,6 @@ HELP
         }
 
         return 0;
-
     }
 
     /**
@@ -490,10 +465,9 @@ HELP
      *
      * @return int
      */
-    protected function color($vObj) {
-
+    protected function color($vObj)
+    {
         fwrite($this->stdout, $this->serializeComponent($vObj));
-
     }
 
     /**
@@ -503,19 +477,19 @@ HELP
      *
      * @return string
      */
-    protected function colorize($color, $str, $resetTo = 'default') {
-
+    protected function colorize($color, $str, $resetTo = 'default')
+    {
         $colors = [
-            'cyan'    => '1;36',
-            'red'     => '1;31',
-            'yellow'  => '1;33',
-            'blue'    => '0;34',
-            'green'   => '0;32',
+            'cyan' => '1;36',
+            'red' => '1;31',
+            'yellow' => '1;33',
+            'blue' => '0;34',
+            'green' => '0;32',
             'default' => '0',
-            'purple'  => '0;35',
+            'purple' => '0;35',
         ];
-        return "\033[" . $colors[$color] . 'm' . $str . "\033[" . $colors[$resetTo] . "m";
 
+        return "\033[".$colors[$color].'m'.$str."\033[".$colors[$resetTo].'m';
     }
 
     /**
@@ -523,20 +497,17 @@ HELP
      *
      * @param string $color
      * @param string $str
-     *
-     * @return void
      */
-    protected function cWrite($color, $str) {
-
+    protected function cWrite($color, $str)
+    {
         fwrite($this->stdout, $this->colorize($color, $str));
-
     }
 
-    protected function serializeComponent(Component $vObj) {
-
+    protected function serializeComponent(Component $vObj)
+    {
         $this->cWrite('cyan', 'BEGIN');
         $this->cWrite('red', ':');
-        $this->cWrite('yellow', $vObj->name . "\n");
+        $this->cWrite('yellow', $vObj->name."\n");
 
         /**
          * Gives a component a 'score' for sorting purposes.
@@ -548,52 +519,51 @@ HELP
          * space to accomodate elements. The $key is added to the $score to
          * preserve the original relative order of elements.
          *
-         * @param int $key
+         * @param int   $key
          * @param array $array
          *
          * @return int
          */
-        $sortScore = function($key, $array) {
-
+        $sortScore = function ($key, $array) {
             if ($array[$key] instanceof Component) {
-
                 // We want to encode VTIMEZONE first, this is a personal
                 // preference.
-                if ($array[$key]->name === 'VTIMEZONE') {
+                if ('VTIMEZONE' === $array[$key]->name) {
                     $score = 300000000;
+
                     return $score + $key;
                 } else {
                     $score = 400000000;
+
                     return $score + $key;
                 }
             } else {
                 // Properties get encoded first
                 // VCARD version 4.0 wants the VERSION property to appear first
                 if ($array[$key] instanceof Property) {
-                    if ($array[$key]->name === 'VERSION') {
+                    if ('VERSION' === $array[$key]->name) {
                         $score = 100000000;
+
                         return $score + $key;
                     } else {
                         // All other properties
                         $score = 200000000;
+
                         return $score + $key;
                     }
                 }
             }
-
         };
 
         $children = $vObj->children();
         $tmp = $children;
         uksort(
             $children,
-            function($a, $b) use ($sortScore, $tmp) {
-
+            function ($a, $b) use ($sortScore, $tmp) {
                 $sA = $sortScore($a, $tmp);
                 $sB = $sortScore($b, $tmp);
 
                 return $sA - $sB;
-
             }
         );
 
@@ -607,19 +577,16 @@ HELP
 
         $this->cWrite('cyan', 'END');
         $this->cWrite('red', ':');
-        $this->cWrite('yellow', $vObj->name . "\n");
-
+        $this->cWrite('yellow', $vObj->name."\n");
     }
 
     /**
      * Colorizes a property.
      *
      * @param Property $property
-     *
-     * @return void
      */
-    protected function serializeProperty(Property $property) {
-
+    protected function serializeProperty(Property $property)
+    {
         if ($property->group) {
             $this->cWrite('default', $property->group);
             $this->cWrite('red', '.');
@@ -628,19 +595,14 @@ HELP
         $this->cWrite('yellow', $property->name);
 
         foreach ($property->parameters as $param) {
-
             $this->cWrite('red', ';');
             $this->cWrite('blue', $param->serialize());
-
         }
         $this->cWrite('red', ':');
 
         if ($property instanceof Property\Binary) {
-
-            $this->cWrite('default', 'embedded binary stripped. (' . strlen($property->getValue()) . ' bytes)');
-
+            $this->cWrite('default', 'embedded binary stripped. ('.strlen($property->getValue()).' bytes)');
         } else {
-
             $parts = $property->getParts();
             $first1 = true;
             // Looping through property values
@@ -652,7 +614,7 @@ HELP
                 }
                 $first2 = true;
                 // Looping through property sub-values
-                foreach ((array)$part as $subPart) {
+                foreach ((array) $part as $subPart) {
                     if ($first2) {
                         $first2 = false;
                     } else {
@@ -664,42 +626,39 @@ HELP
                         $subPart,
                         [
                             '\\' => $this->colorize('purple', '\\\\', 'green'),
-                            ';'  => $this->colorize('purple', '\;', 'green'),
-                            ','  => $this->colorize('purple', '\,', 'green'),
+                            ';' => $this->colorize('purple', '\;', 'green'),
+                            ',' => $this->colorize('purple', '\,', 'green'),
                             "\n" => $this->colorize('purple', "\\n\n\t", 'green'),
-                            "\r" => "",
+                            "\r" => '',
                         ]
                     );
 
                     $this->cWrite('green', $subPart);
                 }
             }
-
         }
-        $this->cWrite("default", "\n");
-
+        $this->cWrite('default', "\n");
     }
 
     /**
      * Parses the list of arguments.
      *
      * @param array $argv
-     *
-     * @return void
      */
-    protected function parseArguments(array $argv) {
-
+    protected function parseArguments(array $argv)
+    {
         $positional = [];
         $options = [];
 
-        for ($ii = 0; $ii < count($argv); $ii++) {
-
+        for ($ii = 0; $ii < count($argv); ++$ii) {
             // Skipping the first argument.
-            if ($ii === 0) continue;
+            if (0 === $ii) {
+                continue;
+            }
 
             $v = $argv[$ii];
 
-            if (substr($v, 0, 2) === '--') {
+            if ('--' === substr($v, 0, 2)) {
                 // This is a long-form option.
                 $optionName = substr($v, 2);
                 $optionValue = true;
@@ -707,22 +666,17 @@ HELP
                     list($optionName, $optionValue) = explode('=', $optionName);
                 }
                 $options[$optionName] = $optionValue;
-            } elseif (substr($v, 0, 1) === '-' && strlen($v) > 1) {
+            } elseif ('-' === substr($v, 0, 1) && strlen($v) > 1) {
                 // This is a short-form option.
                 foreach (str_split(substr($v, 1)) as $option) {
                     $options[$option] = true;
                 }
-
             } else {
-
                 $positional[] = $v;
-
             }
-
         }
 
         return [$options, $positional];
-
     }
 
     protected $parser;
@@ -732,14 +686,14 @@ HELP
      *
      * @return Component
      */
-    protected function readInput() {
-
+    protected function readInput()
+    {
         if (!$this->parser) {
-            if ($this->inputPath !== '-') {
+            if ('-' !== $this->inputPath) {
                 $this->stdin = fopen($this->inputPath, 'r');
             }
 
-            if ($this->inputFormat === 'mimedir') {
+            if ('mimedir' === $this->inputFormat) {
                 $this->parser = new Parser\MimeDir($this->stdin, ($this->forgiving ? Reader::OPTION_FORGIVING : 0));
             } else {
                 $this->parser = new Parser\Json($this->stdin, ($this->forgiving ? Reader::OPTION_FORGIVING : 0));
@@ -747,25 +701,20 @@ HELP
         }
 
         return $this->parser->parse();
-
     }
 
     /**
      * Sends a message to STDERR.
      *
      * @param string $msg
-     *
-     * @return void
      */
-    protected function log($msg, $color = 'default') {
-
+    protected function log($msg, $color = 'default')
+    {
         if (!$this->quiet) {
-            if ($color !== 'default') {
+            if ('default' !== $color) {
                 $msg = $this->colorize($color, $msg);
             }
-            fwrite($this->stderr, $msg . "\n");
+            fwrite($this->stderr, $msg."\n");
         }
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Component.php b/vendor/sabre/vobject/lib/Component.php
index ac87a10ec..a33b7d577 100644
--- a/vendor/sabre/vobject/lib/Component.php
+++ b/vendor/sabre/vobject/lib/Component.php
@@ -14,8 +14,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Component extends Node {
-
+class Component extends Node
+{
     /**
      * Component name.
      *
@@ -44,14 +44,12 @@ class Component extends Node {
      * ensure that this does not happen, set $defaults to false.
      *
      * @param Document $root
-     * @param string $name such as VCALENDAR, VEVENT.
-     * @param array $children
-     * @param bool $defaults
-     *
-     * @return void
+     * @param string   $name     such as VCALENDAR, VEVENT
+     * @param array    $children
+     * @param bool     $defaults
      */
-    function __construct(Document $root, $name, array $children = [], $defaults = true) {
-
+    public function __construct(Document $root, $name, array $children = [], $defaults = true)
+    {
         $this->name = strtoupper($name);
         $this->root = $root;
 
@@ -84,13 +82,11 @@ class Component extends Node {
                     // Component or Property
                     $this->add($child);
                 } else {
-
                     // Property key=>value
                     $this->add($k, $child);
                 }
             }
         }
-
     }
 
     /**
@@ -106,8 +102,8 @@ class Component extends Node {
      *
      * @return Node
      */
-    function add() {
-
+    public function add()
+    {
         $arguments = func_get_args();
 
         if ($arguments[0] instanceof Node) {
@@ -116,15 +112,10 @@ class Component extends Node {
             }
             $arguments[0]->parent = $this;
             $newNode = $arguments[0];
-
         } elseif (is_string($arguments[0])) {
-
             $newNode = call_user_func_array([$this->root, 'create'], $arguments);
-
         } else {
-
             throw new \InvalidArgumentException('The first argument must either be a \\Sabre\\VObject\\Node or a string');
-
         }
 
         $name = $newNode->name;
@@ -133,8 +124,8 @@ class Component extends Node {
         } else {
             $this->children[$name] = [$newNode];
         }
-        return $newNode;
 
+        return $newNode;
     }
 
     /**
@@ -146,36 +137,34 @@ class Component extends Node {
      * exact item will be removed.
      *
      * @param string|Property|Component $item
-     * @return void
      */
-    function remove($item) {
-
+    public function remove($item)
+    {
         if (is_string($item)) {
             // If there's no dot in the name, it's an exact property name and
             // we can just wipe out all those properties.
             //
-            if (strpos($item, '.') === false) {
+            if (false === strpos($item, '.')) {
                 unset($this->children[strtoupper($item)]);
+
                 return;
             }
             // If there was a dot, we need to ask select() to help us out and
             // then we just call remove recursively.
             foreach ($this->select($item) as $child) {
-
                 $this->remove($child);
-
             }
         } else {
             foreach ($this->select($item->name) as $k => $child) {
                 if ($child === $item) {
                     unset($this->children[$item->name][$k]);
+
                     return;
                 }
             }
         }
 
         throw new \InvalidArgumentException('The item you passed to remove() was not a child of this component');
-
     }
 
     /**
@@ -184,14 +173,14 @@ class Component extends Node {
      *
      * @return array
      */
-    function children() {
-
+    public function children()
+    {
         $result = [];
         foreach ($this->children as $childGroup) {
             $result = array_merge($result, $childGroup);
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -200,8 +189,8 @@ class Component extends Node {
      *
      * @return array
      */
-    function getComponents() {
-
+    public function getComponents()
+    {
         $result = [];
 
         foreach ($this->children as $childGroup) {
@@ -211,8 +200,8 @@ class Component extends Node {
                 }
             }
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -226,19 +215,21 @@ class Component extends Node {
      * has not been assigned a group, specify ".EMAIL".
      *
      * @param string $name
+     *
      * @return array
      */
-    function select($name) {
-
+    public function select($name)
+    {
         $group = null;
         $name = strtoupper($name);
-        if (strpos($name, '.') !== false) {
+        if (false !== strpos($name, '.')) {
             list($group, $name) = explode('.', $name, 2);
         }
-        if ($name === '') $name = null;
+        if ('' === $name) {
+            $name = null;
+        }
 
         if (!is_null($name)) {
-
             $result = isset($this->children[$name]) ? $this->children[$name] : [];
 
             if (is_null($group)) {
@@ -248,32 +239,25 @@ class Component extends Node {
                 // more.
                 return array_filter(
                     $result,
-                    function($child) use ($group) {
-
+                    function ($child) use ($group) {
                         return $child instanceof Property && strtoupper($child->group) === $group;
-
                     }
                 );
             }
-
         }
 
         // If we got to this point, it means there was no 'name' specified for
         // searching, implying that this is a group-only search.
         $result = [];
         foreach ($this->children as $childGroup) {
-
             foreach ($childGroup as $child) {
-
                 if ($child instanceof Property && strtoupper($child->group) === $group) {
                     $result[] = $child;
                 }
-
             }
-
         }
-        return $result;
 
+        return $result;
     }
 
     /**
@@ -281,9 +265,9 @@ class Component extends Node {
      *
      * @return string
      */
-    function serialize() {
-
-        $str = "BEGIN:" . $this->name . "\r\n";
+    public function serialize()
+    {
+        $str = 'BEGIN:'.$this->name."\r\n";
 
         /**
          * Gives a component a 'score' for sorting purposes.
@@ -295,60 +279,60 @@ class Component extends Node {
          * space to accomodate elements. The $key is added to the $score to
          * preserve the original relative order of elements.
          *
-         * @param int $key
+         * @param int   $key
          * @param array $array
          *
          * @return int
          */
-        $sortScore = function($key, $array) {
-
+        $sortScore = function ($key, $array) {
             if ($array[$key] instanceof Component) {
-
                 // We want to encode VTIMEZONE first, this is a personal
                 // preference.
-                if ($array[$key]->name === 'VTIMEZONE') {
+                if ('VTIMEZONE' === $array[$key]->name) {
                     $score = 300000000;
+
                     return $score + $key;
                 } else {
                     $score = 400000000;
+
                     return $score + $key;
                 }
             } else {
                 // Properties get encoded first
                 // VCARD version 4.0 wants the VERSION property to appear first
                 if ($array[$key] instanceof Property) {
-                    if ($array[$key]->name === 'VERSION') {
+                    if ('VERSION' === $array[$key]->name) {
                         $score = 100000000;
+
                         return $score + $key;
                     } else {
                         // All other properties
                         $score = 200000000;
+
                         return $score + $key;
                     }
                 }
             }
-
         };
 
         $children = $this->children();
         $tmp = $children;
         uksort(
             $children,
-            function($a, $b) use ($sortScore, $tmp) {
-
+            function ($a, $b) use ($sortScore, $tmp) {
                 $sA = $sortScore($a, $tmp);
                 $sB = $sortScore($b, $tmp);
 
                 return $sA - $sB;
-
             }
         );
 
-        foreach ($children as $child) $str .= $child->serialize();
-        $str .= "END:" . $this->name . "\r\n";
+        foreach ($children as $child) {
+            $str .= $child->serialize();
+        }
+        $str .= 'END:'.$this->name."\r\n";
 
         return $str;
-
     }
 
     /**
@@ -357,8 +341,8 @@ class Component extends Node {
      *
      * @return array
      */
-    function jsonSerialize() {
-
+    public function jsonSerialize()
+    {
         $components = [];
         $properties = [];
 
@@ -375,21 +359,18 @@ class Component extends Node {
         return [
             strtolower($this->name),
             $properties,
-            $components
+            $components,
         ];
-
     }
 
     /**
      * This method serializes the data into XML. This is used to create xCard or
      * xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         $components = [];
         $properties = [];
 
@@ -406,7 +387,6 @@ class Component extends Node {
         $writer->startElement(strtolower($this->name));
 
         if (!empty($properties)) {
-
             $writer->startElement('properties');
 
             foreach ($properties as $property) {
@@ -414,11 +394,9 @@ class Component extends Node {
             }
 
             $writer->endElement();
-
         }
 
         if (!empty($components)) {
-
             $writer->startElement('components');
 
             foreach ($components as $component) {
@@ -429,7 +407,6 @@ class Component extends Node {
         }
 
         $writer->endElement();
-
     }
 
     /**
@@ -437,10 +414,9 @@ class Component extends Node {
      *
      * @return array
      */
-    protected function getDefaults() {
-
+    protected function getDefaults()
+    {
         return [];
-
     }
 
     /* Magic property accessors {{{ */
@@ -459,24 +435,22 @@ class Component extends Node {
      *
      * @return Property
      */
-    function __get($name) {
-
-        if ($name === 'children') {
-
+    public function __get($name)
+    {
+        if ('children' === $name) {
             throw new \RuntimeException('Starting sabre/vobject 4.0 the children property is now protected. You should use the children() method instead');
-
         }
 
         $matches = $this->select($name);
-        if (count($matches) === 0) {
+        if (0 === count($matches)) {
             return;
         } else {
             $firstMatch = current($matches);
-            /** @var $firstMatch Property */
+            /* @var $firstMatch Property */
             $firstMatch->setIterator(new ElementList(array_values($matches)));
+
             return $firstMatch;
         }
-
     }
 
     /**
@@ -486,11 +460,11 @@ class Component extends Node {
      *
      * @return bool
      */
-    function __isset($name) {
-
+    public function __isset($name)
+    {
         $matches = $this->select($name);
-        return count($matches) > 0;
 
+        return count($matches) > 0;
     }
 
     /**
@@ -503,12 +477,10 @@ class Component extends Node {
      * a new item with the same name, always use the add() method.
      *
      * @param string $name
-     * @param mixed $value
-     *
-     * @return void
+     * @param mixed  $value
      */
-    function __set($name, $value) {
-
+    public function __set($name, $value)
+    {
         $name = strtoupper($name);
         $this->remove($name);
         if ($value instanceof self || $value instanceof Property) {
@@ -523,13 +495,10 @@ class Component extends Node {
      * specified name.
      *
      * @param string $name
-     *
-     * @return void
      */
-    function __unset($name) {
-
+    public function __unset($name)
+    {
         $this->remove($name);
-
     }
 
     /* }}} */
@@ -537,11 +506,9 @@ class Component extends Node {
     /**
      * This method is automatically called when the object is cloned.
      * Specifically, this will ensure all child elements are also cloned.
-     *
-     * @return void
      */
-    function __clone() {
-
+    public function __clone()
+    {
         foreach ($this->children as $childName => $childGroup) {
             foreach ($childGroup as $key => $child) {
                 $clonedChild = clone $child;
@@ -550,7 +517,6 @@ class Component extends Node {
                 $this->children[$childName][$key] = $clonedChild;
             }
         }
-
     }
 
     /**
@@ -574,10 +540,9 @@ class Component extends Node {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [];
-
     }
 
     /**
@@ -604,8 +569,8 @@ class Component extends Node {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $rules = $this->getValidationRules();
         $defaults = $this->getDefaults();
 
@@ -618,49 +583,48 @@ class Component extends Node {
             if (!isset($propertyCounters[$name])) {
                 $propertyCounters[$name] = 1;
             } else {
-                $propertyCounters[$name]++;
+                ++$propertyCounters[$name];
             }
             $messages = array_merge($messages, $child->validate($options));
         }
 
         foreach ($rules as $propName => $rule) {
-
             switch ($rule) {
-                case '0' :
+                case '0':
                     if (isset($propertyCounters[$propName])) {
                         $messages[] = [
-                            'level'   => 3,
-                            'message' => $propName . ' MUST NOT appear in a ' . $this->name . ' component',
-                            'node'    => $this,
+                            'level' => 3,
+                            'message' => $propName.' MUST NOT appear in a '.$this->name.' component',
+                            'node' => $this,
                         ];
                     }
                     break;
-                case '1' :
-                    if (!isset($propertyCounters[$propName]) || $propertyCounters[$propName] !== 1) {
+                case '1':
+                    if (!isset($propertyCounters[$propName]) || 1 !== $propertyCounters[$propName]) {
                         $repaired = false;
                         if ($options & self::REPAIR && isset($defaults[$propName])) {
                             $this->add($propName, $defaults[$propName]);
                             $repaired = true;
                         }
                         $messages[] = [
-                            'level'   => $repaired ? 1 : 3,
-                            'message' => $propName . ' MUST appear exactly once in a ' . $this->name . ' component',
-                            'node'    => $this,
+                            'level' => $repaired ? 1 : 3,
+                            'message' => $propName.' MUST appear exactly once in a '.$this->name.' component',
+                            'node' => $this,
                         ];
                     }
                     break;
-                case '+' :
+                case '+':
                     if (!isset($propertyCounters[$propName]) || $propertyCounters[$propName] < 1) {
                         $messages[] = [
-                            'level'   => 3,
-                            'message' => $propName . ' MUST appear at least once in a ' . $this->name . ' component',
-                            'node'    => $this,
+                            'level' => 3,
+                            'message' => $propName.' MUST appear at least once in a '.$this->name.' component',
+                            'node' => $this,
                         ];
                     }
                     break;
-                case '*' :
+                case '*':
                     break;
-                case '?' :
+                case '?':
                     if (isset($propertyCounters[$propName]) && $propertyCounters[$propName] > 1) {
                         $level = 3;
 
@@ -669,7 +633,7 @@ class Component extends Node {
                         if ($options & self::REPAIR) {
                             $properties = array_unique($this->select($propName), SORT_REGULAR);
 
-                            if (count($properties) === 1) {
+                            if (1 === count($properties)) {
                                 $this->remove($propName);
                                 $this->add($properties[0]);
 
@@ -678,18 +642,16 @@ class Component extends Node {
                         }
 
                         $messages[] = [
-                            'level'   => $level,
-                            'message' => $propName . ' MUST NOT appear more than once in a ' . $this->name . ' component',
-                            'node'    => $this,
+                            'level' => $level,
+                            'message' => $propName.' MUST NOT appear more than once in a '.$this->name.' component',
+                            'node' => $this,
                         ];
                     }
                     break;
-
             }
-
         }
-        return $messages;
 
+        return $messages;
     }
 
     /**
@@ -697,11 +659,9 @@ class Component extends Node {
      *
      * It's intended to remove all circular references, so PHP can easily clean
      * it up.
-     *
-     * @return void
      */
-    function destroy() {
-
+    public function destroy()
+    {
         parent::destroy();
         foreach ($this->children as $childGroup) {
             foreach ($childGroup as $child) {
@@ -709,7 +669,5 @@ class Component extends Node {
             }
         }
         $this->children = [];
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Component/Available.php b/vendor/sabre/vobject/lib/Component/Available.php
index b3aaf08af..5510b9e0a 100644
--- a/vendor/sabre/vobject/lib/Component/Available.php
+++ b/vendor/sabre/vobject/lib/Component/Available.php
@@ -14,8 +14,8 @@ use Sabre\VObject;
  * @author Ivan Enderlin
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Available extends VObject\Component {
-
+class Available extends VObject\Component
+{
     /**
      * Returns the 'effective start' and 'effective end' of this VAVAILABILITY
      * component.
@@ -28,8 +28,8 @@ class Available extends VObject\Component {
      *
      * @return array
      */
-    function getEffectiveStartEnd() {
-
+    public function getEffectiveStartEnd()
+    {
         $effectiveStart = $this->DTSTART->getDateTime();
         if (isset($this->DTEND)) {
             $effectiveEnd = $this->DTEND->getDateTime();
@@ -38,7 +38,6 @@ class Available extends VObject\Component {
         }
 
         return [$effectiveStart, $effectiveEnd];
-
     }
 
     /**
@@ -56,32 +55,31 @@ class Available extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'UID'     => 1,
+            'UID' => 1,
             'DTSTART' => 1,
             'DTSTAMP' => 1,
 
-            'DTEND'    => '?',
+            'DTEND' => '?',
             'DURATION' => '?',
 
-            'CREATED'       => '?',
-            'DESCRIPTION'   => '?',
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
             'LAST-MODIFIED' => '?',
             'RECURRENCE-ID' => '?',
-            'RRULE'         => '?',
-            'SUMMARY'       => '?',
+            'RRULE' => '?',
+            'SUMMARY' => '?',
 
             'CATEGORIES' => '*',
-            'COMMENT'    => '*',
-            'CONTACT'    => '*',
-            'EXDATE'     => '*',
-            'RDATE'      => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+            'EXDATE' => '*',
+            'RDATE' => '*',
 
             'AVAILABLE' => '*',
         ];
-
     }
 
     /**
@@ -108,19 +106,18 @@ class Available extends VObject\Component {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $result = parent::validate($options);
 
         if (isset($this->DTEND) && isset($this->DURATION)) {
             $result[] = [
-                'level'   => 3,
+                'level' => 3,
                 'message' => 'DTEND and DURATION cannot both be present',
-                'node'    => $this
+                'node' => $this,
             ];
         }
 
         return $result;
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Component/VAlarm.php b/vendor/sabre/vobject/lib/Component/VAlarm.php
index faa8a5e74..bd00eb600 100644
--- a/vendor/sabre/vobject/lib/Component/VAlarm.php
+++ b/vendor/sabre/vobject/lib/Component/VAlarm.php
@@ -16,8 +16,8 @@ use Sabre\VObject\InvalidDataException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VAlarm extends VObject\Component {
-
+class VAlarm extends VObject\Component
+{
     /**
      * Returns a DateTime object when this alarm is going to trigger.
      *
@@ -25,17 +25,16 @@ class VAlarm extends VObject\Component {
      *
      * @return DateTimeImmutable
      */
-    function getEffectiveTriggerTime() {
-
+    public function getEffectiveTriggerTime()
+    {
         $trigger = $this->TRIGGER;
-        if (!isset($trigger['VALUE']) || strtoupper($trigger['VALUE']) === 'DURATION') {
+        if (!isset($trigger['VALUE']) || 'DURATION' === strtoupper($trigger['VALUE'])) {
             $triggerDuration = VObject\DateTimeParser::parseDuration($this->TRIGGER);
-            $related = (isset($trigger['RELATED']) && strtoupper($trigger['RELATED']) == 'END') ? 'END' : 'START';
+            $related = (isset($trigger['RELATED']) && 'END' == strtoupper($trigger['RELATED'])) ? 'END' : 'START';
 
             $parentComponent = $this->parent;
-            if ($related === 'START') {
-
-                if ($parentComponent->name === 'VTODO') {
+            if ('START' === $related) {
+                if ('VTODO' === $parentComponent->name) {
                     $propName = 'DUE';
                 } else {
                     $propName = 'DTSTART';
@@ -44,9 +43,9 @@ class VAlarm extends VObject\Component {
                 $effectiveTrigger = $parentComponent->$propName->getDateTime();
                 $effectiveTrigger = $effectiveTrigger->add($triggerDuration);
             } else {
-                if ($parentComponent->name === 'VTODO') {
+                if ('VTODO' === $parentComponent->name) {
                     $endProp = 'DUE';
-                } elseif ($parentComponent->name === 'VEVENT') {
+                } elseif ('VEVENT' === $parentComponent->name) {
                     $endProp = 'DTEND';
                 } else {
                     throw new InvalidDataException('time-range filters on VALARM components are only supported when they are a child of VTODO or VEVENT');
@@ -68,8 +67,8 @@ class VAlarm extends VObject\Component {
         } else {
             $effectiveTrigger = $trigger->getDateTime();
         }
-        return $effectiveTrigger;
 
+        return $effectiveTrigger;
     }
 
     /**
@@ -84,30 +83,29 @@ class VAlarm extends VObject\Component {
      *
      * @return bool
      */
-    function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end) {
-
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
         $effectiveTrigger = $this->getEffectiveTriggerTime();
 
         if (isset($this->DURATION)) {
             $duration = VObject\DateTimeParser::parseDuration($this->DURATION);
-            $repeat = (string)$this->REPEAT;
+            $repeat = (string) $this->REPEAT;
             if (!$repeat) {
                 $repeat = 1;
             }
 
-            $period = new \DatePeriod($effectiveTrigger, $duration, (int)$repeat);
+            $period = new \DatePeriod($effectiveTrigger, $duration, (int) $repeat);
 
             foreach ($period as $occurrence) {
-
                 if ($start <= $occurrence && $end > $occurrence) {
                     return true;
                 }
             }
+
             return false;
         } else {
-            return ($start <= $effectiveTrigger && $end > $effectiveTrigger);
+            return $start <= $effectiveTrigger && $end > $effectiveTrigger;
         }
-
     }
 
     /**
@@ -125,18 +123,16 @@ class VAlarm extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'ACTION'  => 1,
+            'ACTION' => 1,
             'TRIGGER' => 1,
 
             'DURATION' => '?',
-            'REPEAT'   => '?',
+            'REPEAT' => '?',
 
             'ATTACH' => '?',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Component/VAvailability.php b/vendor/sabre/vobject/lib/Component/VAvailability.php
index 66b3310c5..6f3e7f13c 100644
--- a/vendor/sabre/vobject/lib/Component/VAvailability.php
+++ b/vendor/sabre/vobject/lib/Component/VAvailability.php
@@ -15,8 +15,8 @@ use Sabre\VObject;
  * @author Ivan Enderlin
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VAvailability extends VObject\Component {
-
+class VAvailability extends VObject\Component
+{
     /**
      * Returns true or false depending on if the event falls in the specified
      * time-range. This is used for filtering purposes.
@@ -31,14 +31,14 @@ class VAvailability extends VObject\Component {
      *
      * @return bool
      */
-    function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end) {
-
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
         list($effectiveStart, $effectiveEnd) = $this->getEffectiveStartEnd();
-        return (
+
+        return
             (is_null($effectiveStart) || $start < $effectiveEnd) &&
             (is_null($effectiveEnd) || $end > $effectiveStart)
-        );
-
+        ;
     }
 
     /**
@@ -53,8 +53,8 @@ class VAvailability extends VObject\Component {
      *
      * @return array
      */
-    function getEffectiveStartEnd() {
-
+    public function getEffectiveStartEnd()
+    {
         $effectiveStart = null;
         $effectiveEnd = null;
 
@@ -68,10 +68,8 @@ class VAvailability extends VObject\Component {
         }
 
         return [$effectiveStart, $effectiveEnd];
-
     }
 
-
     /**
      * A simple list of validation rules.
      *
@@ -87,31 +85,30 @@ class VAvailability extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'UID'     => 1,
+            'UID' => 1,
             'DTSTAMP' => 1,
 
-            'BUSYTYPE'      => '?',
-            'CLASS'         => '?',
-            'CREATED'       => '?',
-            'DESCRIPTION'   => '?',
-            'DTSTART'       => '?',
+            'BUSYTYPE' => '?',
+            'CLASS' => '?',
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
+            'DTSTART' => '?',
             'LAST-MODIFIED' => '?',
-            'ORGANIZER'     => '?',
-            'PRIORITY'      => '?',
-            'SEQUENCE'      => '?',
-            'SUMMARY'       => '?',
-            'URL'           => '?',
-            'DTEND'         => '?',
-            'DURATION'      => '?',
+            'ORGANIZER' => '?',
+            'PRIORITY' => '?',
+            'SEQUENCE' => '?',
+            'SUMMARY' => '?',
+            'URL' => '?',
+            'DTEND' => '?',
+            'DURATION' => '?',
 
             'CATEGORIES' => '*',
-            'COMMENT'    => '*',
-            'CONTACT'    => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
         ];
-
     }
 
     /**
@@ -138,19 +135,18 @@ class VAvailability extends VObject\Component {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $result = parent::validate($options);
 
         if (isset($this->DTEND) && isset($this->DURATION)) {
             $result[] = [
-                'level'   => 3,
+                'level' => 3,
                 'message' => 'DTEND and DURATION cannot both be present',
-                'node'    => $this
+                'node' => $this,
             ];
         }
 
         return $result;
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Component/VCalendar.php b/vendor/sabre/vobject/lib/Component/VCalendar.php
index 1b3137d38..4687a092b 100644
--- a/vendor/sabre/vobject/lib/Component/VCalendar.php
+++ b/vendor/sabre/vobject/lib/Component/VCalendar.php
@@ -20,8 +20,8 @@ use Sabre\VObject\Recur\NoInstancesException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VCalendar extends VObject\Document {
-
+class VCalendar extends VObject\Document
+{
     /**
      * The default name for this component.
      *
@@ -29,23 +29,23 @@ class VCalendar extends VObject\Document {
      *
      * @var string
      */
-    static $defaultName = 'VCALENDAR';
+    public static $defaultName = 'VCALENDAR';
 
     /**
      * This is a list of components, and which classes they should map to.
      *
      * @var array
      */
-    static $componentMap = [
-        'VCALENDAR'     => 'Sabre\\VObject\\Component\\VCalendar',
-        'VALARM'        => 'Sabre\\VObject\\Component\\VAlarm',
-        'VEVENT'        => 'Sabre\\VObject\\Component\\VEvent',
-        'VFREEBUSY'     => 'Sabre\\VObject\\Component\\VFreeBusy',
+    public static $componentMap = [
+        'VCALENDAR' => 'Sabre\\VObject\\Component\\VCalendar',
+        'VALARM' => 'Sabre\\VObject\\Component\\VAlarm',
+        'VEVENT' => 'Sabre\\VObject\\Component\\VEvent',
+        'VFREEBUSY' => 'Sabre\\VObject\\Component\\VFreeBusy',
         'VAVAILABILITY' => 'Sabre\\VObject\\Component\\VAvailability',
-        'AVAILABLE'     => 'Sabre\\VObject\\Component\\Available',
-        'VJOURNAL'      => 'Sabre\\VObject\\Component\\VJournal',
-        'VTIMEZONE'     => 'Sabre\\VObject\\Component\\VTimeZone',
-        'VTODO'         => 'Sabre\\VObject\\Component\\VTodo',
+        'AVAILABLE' => 'Sabre\\VObject\\Component\\Available',
+        'VJOURNAL' => 'Sabre\\VObject\\Component\\VJournal',
+        'VTIMEZONE' => 'Sabre\\VObject\\Component\\VTimeZone',
+        'VTODO' => 'Sabre\\VObject\\Component\\VTodo',
     ];
 
     /**
@@ -53,22 +53,22 @@ class VCalendar extends VObject\Document {
      *
      * @var array
      */
-    static $valueMap = [
-        'BINARY'      => 'Sabre\\VObject\\Property\\Binary',
-        'BOOLEAN'     => 'Sabre\\VObject\\Property\\Boolean',
+    public static $valueMap = [
+        'BINARY' => 'Sabre\\VObject\\Property\\Binary',
+        'BOOLEAN' => 'Sabre\\VObject\\Property\\Boolean',
         'CAL-ADDRESS' => 'Sabre\\VObject\\Property\\ICalendar\\CalAddress',
-        'DATE'        => 'Sabre\\VObject\\Property\\ICalendar\\Date',
-        'DATE-TIME'   => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'DURATION'    => 'Sabre\\VObject\\Property\\ICalendar\\Duration',
-        'FLOAT'       => 'Sabre\\VObject\\Property\\FloatValue',
-        'INTEGER'     => 'Sabre\\VObject\\Property\\IntegerValue',
-        'PERIOD'      => 'Sabre\\VObject\\Property\\ICalendar\\Period',
-        'RECUR'       => 'Sabre\\VObject\\Property\\ICalendar\\Recur',
-        'TEXT'        => 'Sabre\\VObject\\Property\\Text',
-        'TIME'        => 'Sabre\\VObject\\Property\\Time',
-        'UNKNOWN'     => 'Sabre\\VObject\\Property\\Unknown', // jCard / jCal-only.
-        'URI'         => 'Sabre\\VObject\\Property\\Uri',
-        'UTC-OFFSET'  => 'Sabre\\VObject\\Property\\UtcOffset',
+        'DATE' => 'Sabre\\VObject\\Property\\ICalendar\\Date',
+        'DATE-TIME' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'DURATION' => 'Sabre\\VObject\\Property\\ICalendar\\Duration',
+        'FLOAT' => 'Sabre\\VObject\\Property\\FloatValue',
+        'INTEGER' => 'Sabre\\VObject\\Property\\IntegerValue',
+        'PERIOD' => 'Sabre\\VObject\\Property\\ICalendar\\Period',
+        'RECUR' => 'Sabre\\VObject\\Property\\ICalendar\\Recur',
+        'TEXT' => 'Sabre\\VObject\\Property\\Text',
+        'TIME' => 'Sabre\\VObject\\Property\\Time',
+        'UNKNOWN' => 'Sabre\\VObject\\Property\\Unknown', // jCard / jCal-only.
+        'URI' => 'Sabre\\VObject\\Property\\Uri',
+        'UTC-OFFSET' => 'Sabre\\VObject\\Property\\UtcOffset',
     ];
 
     /**
@@ -76,81 +76,80 @@ class VCalendar extends VObject\Document {
      *
      * @var array
      */
-    static $propertyMap = [
+    public static $propertyMap = [
         // Calendar properties
         'CALSCALE' => 'Sabre\\VObject\\Property\\FlatText',
-        'METHOD'   => 'Sabre\\VObject\\Property\\FlatText',
-        'PRODID'   => 'Sabre\\VObject\\Property\\FlatText',
-        'VERSION'  => 'Sabre\\VObject\\Property\\FlatText',
+        'METHOD' => 'Sabre\\VObject\\Property\\FlatText',
+        'PRODID' => 'Sabre\\VObject\\Property\\FlatText',
+        'VERSION' => 'Sabre\\VObject\\Property\\FlatText',
 
         // Component properties
-        'ATTACH'           => 'Sabre\\VObject\\Property\\Uri',
-        'CATEGORIES'       => 'Sabre\\VObject\\Property\\Text',
-        'CLASS'            => 'Sabre\\VObject\\Property\\FlatText',
-        'COMMENT'          => 'Sabre\\VObject\\Property\\FlatText',
-        'DESCRIPTION'      => 'Sabre\\VObject\\Property\\FlatText',
-        'GEO'              => 'Sabre\\VObject\\Property\\FloatValue',
-        'LOCATION'         => 'Sabre\\VObject\\Property\\FlatText',
+        'ATTACH' => 'Sabre\\VObject\\Property\\Uri',
+        'CATEGORIES' => 'Sabre\\VObject\\Property\\Text',
+        'CLASS' => 'Sabre\\VObject\\Property\\FlatText',
+        'COMMENT' => 'Sabre\\VObject\\Property\\FlatText',
+        'DESCRIPTION' => 'Sabre\\VObject\\Property\\FlatText',
+        'GEO' => 'Sabre\\VObject\\Property\\FloatValue',
+        'LOCATION' => 'Sabre\\VObject\\Property\\FlatText',
         'PERCENT-COMPLETE' => 'Sabre\\VObject\\Property\\IntegerValue',
-        'PRIORITY'         => 'Sabre\\VObject\\Property\\IntegerValue',
-        'RESOURCES'        => 'Sabre\\VObject\\Property\\Text',
-        'STATUS'           => 'Sabre\\VObject\\Property\\FlatText',
-        'SUMMARY'          => 'Sabre\\VObject\\Property\\FlatText',
+        'PRIORITY' => 'Sabre\\VObject\\Property\\IntegerValue',
+        'RESOURCES' => 'Sabre\\VObject\\Property\\Text',
+        'STATUS' => 'Sabre\\VObject\\Property\\FlatText',
+        'SUMMARY' => 'Sabre\\VObject\\Property\\FlatText',
 
         // Date and Time Component Properties
         'COMPLETED' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'DTEND'     => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'DUE'       => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'DTSTART'   => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'DURATION'  => 'Sabre\\VObject\\Property\\ICalendar\\Duration',
-        'FREEBUSY'  => 'Sabre\\VObject\\Property\\ICalendar\\Period',
-        'TRANSP'    => 'Sabre\\VObject\\Property\\FlatText',
+        'DTEND' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'DUE' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'DTSTART' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'DURATION' => 'Sabre\\VObject\\Property\\ICalendar\\Duration',
+        'FREEBUSY' => 'Sabre\\VObject\\Property\\ICalendar\\Period',
+        'TRANSP' => 'Sabre\\VObject\\Property\\FlatText',
 
         // Time Zone Component Properties
-        'TZID'         => 'Sabre\\VObject\\Property\\FlatText',
-        'TZNAME'       => 'Sabre\\VObject\\Property\\FlatText',
+        'TZID' => 'Sabre\\VObject\\Property\\FlatText',
+        'TZNAME' => 'Sabre\\VObject\\Property\\FlatText',
         'TZOFFSETFROM' => 'Sabre\\VObject\\Property\\UtcOffset',
-        'TZOFFSETTO'   => 'Sabre\\VObject\\Property\\UtcOffset',
-        'TZURL'        => 'Sabre\\VObject\\Property\\Uri',
+        'TZOFFSETTO' => 'Sabre\\VObject\\Property\\UtcOffset',
+        'TZURL' => 'Sabre\\VObject\\Property\\Uri',
 
         // Relationship Component Properties
-        'ATTENDEE'      => 'Sabre\\VObject\\Property\\ICalendar\\CalAddress',
-        'CONTACT'       => 'Sabre\\VObject\\Property\\FlatText',
-        'ORGANIZER'     => 'Sabre\\VObject\\Property\\ICalendar\\CalAddress',
+        'ATTENDEE' => 'Sabre\\VObject\\Property\\ICalendar\\CalAddress',
+        'CONTACT' => 'Sabre\\VObject\\Property\\FlatText',
+        'ORGANIZER' => 'Sabre\\VObject\\Property\\ICalendar\\CalAddress',
         'RECURRENCE-ID' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'RELATED-TO'    => 'Sabre\\VObject\\Property\\FlatText',
-        'URL'           => 'Sabre\\VObject\\Property\\Uri',
-        'UID'           => 'Sabre\\VObject\\Property\\FlatText',
+        'RELATED-TO' => 'Sabre\\VObject\\Property\\FlatText',
+        'URL' => 'Sabre\\VObject\\Property\\Uri',
+        'UID' => 'Sabre\\VObject\\Property\\FlatText',
 
         // Recurrence Component Properties
         'EXDATE' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'RDATE'  => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'RRULE'  => 'Sabre\\VObject\\Property\\ICalendar\\Recur',
+        'RDATE' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'RRULE' => 'Sabre\\VObject\\Property\\ICalendar\\Recur',
         'EXRULE' => 'Sabre\\VObject\\Property\\ICalendar\\Recur', // Deprecated since rfc5545
 
         // Alarm Component Properties
-        'ACTION'  => 'Sabre\\VObject\\Property\\FlatText',
-        'REPEAT'  => 'Sabre\\VObject\\Property\\IntegerValue',
+        'ACTION' => 'Sabre\\VObject\\Property\\FlatText',
+        'REPEAT' => 'Sabre\\VObject\\Property\\IntegerValue',
         'TRIGGER' => 'Sabre\\VObject\\Property\\ICalendar\\Duration',
 
         // Change Management Component Properties
-        'CREATED'       => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'DTSTAMP'       => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'CREATED' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'DTSTAMP' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
         'LAST-MODIFIED' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'SEQUENCE'      => 'Sabre\\VObject\\Property\\IntegerValue',
+        'SEQUENCE' => 'Sabre\\VObject\\Property\\IntegerValue',
 
         // Request Status
         'REQUEST-STATUS' => 'Sabre\\VObject\\Property\\Text',
 
         // Additions from draft-daboo-valarm-extensions-04
-        'ALARM-AGENT'   => 'Sabre\\VObject\\Property\\Text',
-        'ACKNOWLEDGED'  => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
-        'PROXIMITY'     => 'Sabre\\VObject\\Property\\Text',
+        'ALARM-AGENT' => 'Sabre\\VObject\\Property\\Text',
+        'ACKNOWLEDGED' => 'Sabre\\VObject\\Property\\ICalendar\\DateTime',
+        'PROXIMITY' => 'Sabre\\VObject\\Property\\Text',
         'DEFAULT-ALARM' => 'Sabre\\VObject\\Property\\Boolean',
 
         // Additions from draft-daboo-calendar-availability-05
         'BUSYTYPE' => 'Sabre\\VObject\\Property\\Text',
-
     ];
 
     /**
@@ -158,10 +157,9 @@ class VCalendar extends VObject\Document {
      *
      * @return int
      */
-    function getDocumentType() {
-
+    public function getDocumentType()
+    {
         return self::ICALENDAR20;
-
     }
 
     /**
@@ -175,21 +173,20 @@ class VCalendar extends VObject\Document {
      *
      * @return VObject\Component[]
      */
-    function getBaseComponents($componentName = null) {
-
-        $isBaseComponent = function($component) {
-
+    public function getBaseComponents($componentName = null)
+    {
+        $isBaseComponent = function ($component) {
             if (!$component instanceof VObject\Component) {
                 return false;
             }
-            if ($component->name === 'VTIMEZONE') {
+            if ('VTIMEZONE' === $component->name) {
                 return false;
             }
             if (isset($component->{'RECURRENCE-ID'})) {
                 return false;
             }
-            return true;
 
+            return true;
         };
 
         if ($componentName) {
@@ -202,9 +199,7 @@ class VCalendar extends VObject\Document {
 
         $components = [];
         foreach ($this->children as $childGroup) {
-
             foreach ($childGroup as $child) {
-
                 if (!$child instanceof Component) {
                     // If one child is not a component, they all are so we skip
                     // the entire group.
@@ -213,12 +208,10 @@ class VCalendar extends VObject\Document {
                 if ($isBaseComponent($child)) {
                     $components[] = $child;
                 }
-
             }
-
         }
-        return $components;
 
+        return $components;
     }
 
     /**
@@ -231,21 +224,20 @@ class VCalendar extends VObject\Document {
      *
      * @return VObject\Component|null
      */
-    function getBaseComponent($componentName = null) {
-
-        $isBaseComponent = function($component) {
-
+    public function getBaseComponent($componentName = null)
+    {
+        $isBaseComponent = function ($component) {
             if (!$component instanceof VObject\Component) {
                 return false;
             }
-            if ($component->name === 'VTIMEZONE') {
+            if ('VTIMEZONE' === $component->name) {
                 return false;
             }
             if (isset($component->{'RECURRENCE-ID'})) {
                 return false;
             }
-            return true;
 
+            return true;
         };
 
         if ($componentName) {
@@ -254,6 +246,7 @@ class VCalendar extends VObject\Document {
                     return $child;
                 }
             }
+
             return null;
         }
 
@@ -264,10 +257,9 @@ class VCalendar extends VObject\Document {
                     return $child;
                 }
             }
-
         }
-        return null;
 
+        return null;
     }
 
     /**
@@ -277,7 +269,7 @@ class VCalendar extends VObject\Document {
      * If this calendar object, has events with recurrence rules, this method
      * can be used to expand the event into multiple sub-events.
      *
-     * Each event will be stripped from it's recurrence information, and only
+     * Each event will be stripped from its recurrence information, and only
      * the instances of the event in the specified timerange will be left
      * alone.
      *
@@ -286,12 +278,13 @@ class VCalendar extends VObject\Document {
      *
      * @param DateTimeInterface $start
      * @param DateTimeInterface $end
-     * @param DateTimeZone $timeZone reference timezone for floating dates and
-     *                     times.
+     * @param DateTimeZone      $timeZone reference timezone for floating dates and
+     *                                    times
+     *
      * @return VCalendar
      */
-    function expand(DateTimeInterface $start, DateTimeInterface $end, DateTimeZone $timeZone = null) {
-
+    public function expand(DateTimeInterface $start, DateTimeInterface $end, DateTimeZone $timeZone = null)
+    {
         $newChildren = [];
         $recurringEvents = [];
 
@@ -299,11 +292,9 @@ class VCalendar extends VObject\Document {
             $timeZone = new DateTimeZone('UTC');
         }
 
-        $stripTimezones = function(Component $component) use ($timeZone, &$stripTimezones) {
-
+        $stripTimezones = function (Component $component) use ($timeZone, &$stripTimezones) {
             foreach ($component->children() as $componentChild) {
                 if ($componentChild instanceof Property\ICalendar\DateTime && $componentChild->hasTime()) {
-
                     $dt = $componentChild->getDateTimes($timeZone);
                     // We only need to update the first timezone, because
                     // setDateTimes will match all other timezones to the
@@ -313,25 +304,22 @@ class VCalendar extends VObject\Document {
                 } elseif ($componentChild instanceof Component) {
                     $stripTimezones($componentChild);
                 }
-
             }
-            return $component;
 
+            return $component;
         };
 
         foreach ($this->children() as $child) {
-
-            if ($child instanceof Property && $child->name !== 'PRODID') {
+            if ($child instanceof Property && 'PRODID' !== $child->name) {
                 // We explictly want to ignore PRODID, because we want to
                 // overwrite it with our own.
                 $newChildren[] = clone $child;
-            } elseif ($child instanceof Component && $child->name !== 'VTIMEZONE') {
-
+            } elseif ($child instanceof Component && 'VTIMEZONE' !== $child->name) {
                 // We're also stripping all VTIMEZONE objects because we're
                 // converting everything to UTC.
-                if ($child->name === 'VEVENT' && (isset($child->{'RECURRENCE-ID'}) || isset($child->RRULE) || isset($child->RDATE))) {
+                if ('VEVENT' === $child->name && (isset($child->{'RECURRENCE-ID'}) || isset($child->RRULE) || isset($child->RDATE))) {
                     // Handle these a bit later.
-                    $uid = (string)$child->UID;
+                    $uid = (string) $child->UID;
                     if (!$uid) {
                         throw new InvalidDataException('Every VEVENT object must have a UID property');
                     }
@@ -340,19 +328,15 @@ class VCalendar extends VObject\Document {
                     } else {
                         $recurringEvents[$uid] = [clone $child];
                     }
-                } elseif ($child->name === 'VEVENT' && $child->isInTimeRange($start, $end)) {
+                } elseif ('VEVENT' === $child->name && $child->isInTimeRange($start, $end)) {
                     $newChildren[] = $stripTimezones(clone $child);
                 }
-
             }
-
         }
 
         foreach ($recurringEvents as $events) {
-
             try {
                 $it = new EventIterator($events, $timeZone);
-
             } catch (NoInstancesException $e) {
                 // This event is recurring, but it doesn't have a single
                 // instance. We are skipping this event from the output
@@ -362,20 +346,14 @@ class VCalendar extends VObject\Document {
             $it->fastForward($start);
 
             while ($it->valid() && $it->getDTStart() < $end) {
-
                 if ($it->getDTEnd() > $start) {
-
                     $newChildren[] = $stripTimezones($it->getEventObject());
-
                 }
                 $it->next();
-
             }
-
         }
 
         return new self($newChildren);
-
     }
 
     /**
@@ -383,14 +361,13 @@ class VCalendar extends VObject\Document {
      *
      * @return array
      */
-    protected function getDefaults() {
-
+    protected function getDefaults()
+    {
         return [
-            'VERSION'  => '2.0',
-            'PRODID'   => '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN',
+            'VERSION' => '2.0',
+            'PRODID' => '-//Sabre//Sabre VObject '.VObject\Version::VERSION.'//EN',
             'CALSCALE' => 'GREGORIAN',
         ];
-
     }
 
     /**
@@ -408,16 +385,15 @@ class VCalendar extends VObject\Document {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'PRODID'  => 1,
+            'PRODID' => 1,
             'VERSION' => 1,
 
             'CALSCALE' => '?',
-            'METHOD'   => '?',
+            'METHOD' => '?',
         ];
-
     }
 
     /**
@@ -444,19 +420,18 @@ class VCalendar extends VObject\Document {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $warnings = parent::validate($options);
 
         if ($ver = $this->VERSION) {
-            if ((string)$ver !== '2.0') {
+            if ('2.0' !== (string) $ver) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'Only iCalendar version 2.0 as defined in rfc5545 is supported.',
-                    'node'    => $this,
+                    'node' => $this,
                 ];
             }
-
         }
 
         $uidList = [];
@@ -465,77 +440,75 @@ class VCalendar extends VObject\Document {
 
         foreach ($this->children() as $child) {
             if ($child instanceof Component) {
-                $componentsFound++;
+                ++$componentsFound;
 
                 if (!in_array($child->name, ['VEVENT', 'VTODO', 'VJOURNAL'])) {
                     continue;
                 }
                 $componentTypes[] = $child->name;
 
-                $uid = (string)$child->UID;
+                $uid = (string) $child->UID;
                 $isMaster = isset($child->{'RECURRENCE-ID'}) ? 0 : 1;
                 if (isset($uidList[$uid])) {
-                    $uidList[$uid]['count']++;
+                    ++$uidList[$uid]['count'];
                     if ($isMaster && $uidList[$uid]['hasMaster']) {
                         $warnings[] = [
-                            'level'   => 3,
-                            'message' => 'More than one master object was found for the object with UID ' . $uid,
-                            'node'    => $this,
+                            'level' => 3,
+                            'message' => 'More than one master object was found for the object with UID '.$uid,
+                            'node' => $this,
                         ];
                     }
                     $uidList[$uid]['hasMaster'] += $isMaster;
                 } else {
                     $uidList[$uid] = [
-                        'count'     => 1,
+                        'count' => 1,
                         'hasMaster' => $isMaster,
                     ];
                 }
-
             }
         }
 
-        if ($componentsFound === 0) {
+        if (0 === $componentsFound) {
             $warnings[] = [
-                'level'   => 3,
+                'level' => 3,
                 'message' => 'An iCalendar object must have at least 1 component.',
-                'node'    => $this,
+                'node' => $this,
             ];
         }
 
         if ($options & self::PROFILE_CALDAV) {
             if (count($uidList) > 1) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'A calendar object on a CalDAV server may only have components with the same UID.',
-                    'node'    => $this,
+                    'node' => $this,
                 ];
             }
-            if (count($componentTypes) === 0) {
+            if (0 === count($componentTypes)) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'A calendar object on a CalDAV server must have at least 1 component (VTODO, VEVENT, VJOURNAL).',
-                    'node'    => $this,
+                    'node' => $this,
                 ];
             }
             if (count(array_unique($componentTypes)) > 1) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'A calendar object on a CalDAV server may only have 1 type of component (VEVENT, VTODO or VJOURNAL).',
-                    'node'    => $this,
+                    'node' => $this,
                 ];
             }
 
             if (isset($this->METHOD)) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'A calendar object on a CalDAV server MUST NOT have a METHOD property.',
-                    'node'    => $this,
+                    'node' => $this,
                 ];
             }
         }
 
         return $warnings;
-
     }
 
     /**
@@ -543,19 +516,15 @@ class VCalendar extends VObject\Document {
      *
      * @return array
      */
-    function getByUID($uid) {
-
-        return array_filter($this->getComponents(), function($item) use ($uid) {
-
+    public function getByUID($uid)
+    {
+        return array_filter($this->getComponents(), function ($item) use ($uid) {
             if (!$itemUid = $item->select('UID')) {
                 return false;
             }
             $itemUid = current($itemUid)->getValue();
-            return $uid === $itemUid;
 
+            return $uid === $itemUid;
         });
-
     }
-
-
 }
diff --git a/vendor/sabre/vobject/lib/Component/VCard.php b/vendor/sabre/vobject/lib/Component/VCard.php
index bca623d5e..860e45ffa 100644
--- a/vendor/sabre/vobject/lib/Component/VCard.php
+++ b/vendor/sabre/vobject/lib/Component/VCard.php
@@ -15,8 +15,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VCard extends VObject\Document {
-
+class VCard extends VObject\Document
+{
     /**
      * The default name for this component.
      *
@@ -24,7 +24,7 @@ class VCard extends VObject\Document {
      *
      * @var string
      */
-    static $defaultName = 'VCARD';
+    public static $defaultName = 'VCARD';
 
     /**
      * Caching the version number.
@@ -38,7 +38,7 @@ class VCard extends VObject\Document {
      *
      * @var array
      */
-    static $componentMap = [
+    public static $componentMap = [
         'VCARD' => 'Sabre\\VObject\\Component\\VCard',
     ];
 
@@ -47,23 +47,23 @@ class VCard extends VObject\Document {
      *
      * @var array
      */
-    static $valueMap = [
-        'BINARY'           => 'Sabre\\VObject\\Property\\Binary',
-        'BOOLEAN'          => 'Sabre\\VObject\\Property\\Boolean',
-        'CONTENT-ID'       => 'Sabre\\VObject\\Property\\FlatText',   // vCard 2.1 only
-        'DATE'             => 'Sabre\\VObject\\Property\\VCard\\Date',
-        'DATE-TIME'        => 'Sabre\\VObject\\Property\\VCard\\DateTime',
+    public static $valueMap = [
+        'BINARY' => 'Sabre\\VObject\\Property\\Binary',
+        'BOOLEAN' => 'Sabre\\VObject\\Property\\Boolean',
+        'CONTENT-ID' => 'Sabre\\VObject\\Property\\FlatText',   // vCard 2.1 only
+        'DATE' => 'Sabre\\VObject\\Property\\VCard\\Date',
+        'DATE-TIME' => 'Sabre\\VObject\\Property\\VCard\\DateTime',
         'DATE-AND-OR-TIME' => 'Sabre\\VObject\\Property\\VCard\\DateAndOrTime', // vCard only
-        'FLOAT'            => 'Sabre\\VObject\\Property\\FloatValue',
-        'INTEGER'          => 'Sabre\\VObject\\Property\\IntegerValue',
-        'LANGUAGE-TAG'     => 'Sabre\\VObject\\Property\\VCard\\LanguageTag',
-        'TIMESTAMP'        => 'Sabre\\VObject\\Property\\VCard\\TimeStamp',
-        'TEXT'             => 'Sabre\\VObject\\Property\\Text',
-        'TIME'             => 'Sabre\\VObject\\Property\\Time',
-        'UNKNOWN'          => 'Sabre\\VObject\\Property\\Unknown', // jCard / jCal-only.
-        'URI'              => 'Sabre\\VObject\\Property\\Uri',
-        'URL'              => 'Sabre\\VObject\\Property\\Uri', // vCard 2.1 only
-        'UTC-OFFSET'       => 'Sabre\\VObject\\Property\\UtcOffset',
+        'FLOAT' => 'Sabre\\VObject\\Property\\FloatValue',
+        'INTEGER' => 'Sabre\\VObject\\Property\\IntegerValue',
+        'LANGUAGE-TAG' => 'Sabre\\VObject\\Property\\VCard\\LanguageTag',
+        'TIMESTAMP' => 'Sabre\\VObject\\Property\\VCard\\TimeStamp',
+        'TEXT' => 'Sabre\\VObject\\Property\\Text',
+        'TIME' => 'Sabre\\VObject\\Property\\Time',
+        'UNKNOWN' => 'Sabre\\VObject\\Property\\Unknown', // jCard / jCal-only.
+        'URI' => 'Sabre\\VObject\\Property\\Uri',
+        'URL' => 'Sabre\\VObject\\Property\\Uri', // vCard 2.1 only
+        'UTC-OFFSET' => 'Sabre\\VObject\\Property\\UtcOffset',
     ];
 
     /**
@@ -71,72 +71,70 @@ class VCard extends VObject\Document {
      *
      * @var array
      */
-    static $propertyMap = [
-
+    public static $propertyMap = [
         // vCard 2.1 properties and up
-        'N'      => 'Sabre\\VObject\\Property\\Text',
-        'FN'     => 'Sabre\\VObject\\Property\\FlatText',
-        'PHOTO'  => 'Sabre\\VObject\\Property\\Binary',
-        'BDAY'   => 'Sabre\\VObject\\Property\\VCard\\DateAndOrTime',
-        'ADR'    => 'Sabre\\VObject\\Property\\Text',
-        'LABEL'  => 'Sabre\\VObject\\Property\\FlatText', // Removed in vCard 4.0
-        'TEL'    => 'Sabre\\VObject\\Property\\FlatText',
-        'EMAIL'  => 'Sabre\\VObject\\Property\\FlatText',
+        'N' => 'Sabre\\VObject\\Property\\Text',
+        'FN' => 'Sabre\\VObject\\Property\\FlatText',
+        'PHOTO' => 'Sabre\\VObject\\Property\\Binary',
+        'BDAY' => 'Sabre\\VObject\\Property\\VCard\\DateAndOrTime',
+        'ADR' => 'Sabre\\VObject\\Property\\Text',
+        'LABEL' => 'Sabre\\VObject\\Property\\FlatText', // Removed in vCard 4.0
+        'TEL' => 'Sabre\\VObject\\Property\\FlatText',
+        'EMAIL' => 'Sabre\\VObject\\Property\\FlatText',
         'MAILER' => 'Sabre\\VObject\\Property\\FlatText', // Removed in vCard 4.0
-        'GEO'    => 'Sabre\\VObject\\Property\\FlatText',
-        'TITLE'  => 'Sabre\\VObject\\Property\\FlatText',
-        'ROLE'   => 'Sabre\\VObject\\Property\\FlatText',
-        'LOGO'   => 'Sabre\\VObject\\Property\\Binary',
+        'GEO' => 'Sabre\\VObject\\Property\\FlatText',
+        'TITLE' => 'Sabre\\VObject\\Property\\FlatText',
+        'ROLE' => 'Sabre\\VObject\\Property\\FlatText',
+        'LOGO' => 'Sabre\\VObject\\Property\\Binary',
         // 'AGENT'   => 'Sabre\\VObject\\Property\\',      // Todo: is an embedded vCard. Probably rare, so
                                  // not supported at the moment
-        'ORG'     => 'Sabre\\VObject\\Property\\Text',
-        'NOTE'    => 'Sabre\\VObject\\Property\\FlatText',
-        'REV'     => 'Sabre\\VObject\\Property\\VCard\\TimeStamp',
-        'SOUND'   => 'Sabre\\VObject\\Property\\FlatText',
-        'URL'     => 'Sabre\\VObject\\Property\\Uri',
-        'UID'     => 'Sabre\\VObject\\Property\\FlatText',
+        'ORG' => 'Sabre\\VObject\\Property\\Text',
+        'NOTE' => 'Sabre\\VObject\\Property\\FlatText',
+        'REV' => 'Sabre\\VObject\\Property\\VCard\\TimeStamp',
+        'SOUND' => 'Sabre\\VObject\\Property\\FlatText',
+        'URL' => 'Sabre\\VObject\\Property\\Uri',
+        'UID' => 'Sabre\\VObject\\Property\\FlatText',
         'VERSION' => 'Sabre\\VObject\\Property\\FlatText',
-        'KEY'     => 'Sabre\\VObject\\Property\\FlatText',
-        'TZ'      => 'Sabre\\VObject\\Property\\Text',
+        'KEY' => 'Sabre\\VObject\\Property\\FlatText',
+        'TZ' => 'Sabre\\VObject\\Property\\Text',
 
         // vCard 3.0 properties
-        'CATEGORIES'  => 'Sabre\\VObject\\Property\\Text',
+        'CATEGORIES' => 'Sabre\\VObject\\Property\\Text',
         'SORT-STRING' => 'Sabre\\VObject\\Property\\FlatText',
-        'PRODID'      => 'Sabre\\VObject\\Property\\FlatText',
-        'NICKNAME'    => 'Sabre\\VObject\\Property\\Text',
-        'CLASS'       => 'Sabre\\VObject\\Property\\FlatText', // Removed in vCard 4.0
+        'PRODID' => 'Sabre\\VObject\\Property\\FlatText',
+        'NICKNAME' => 'Sabre\\VObject\\Property\\Text',
+        'CLASS' => 'Sabre\\VObject\\Property\\FlatText', // Removed in vCard 4.0
 
         // rfc2739 properties
-        'FBURL'     => 'Sabre\\VObject\\Property\\Uri',
-        'CAPURI'    => 'Sabre\\VObject\\Property\\Uri',
-        'CALURI'    => 'Sabre\\VObject\\Property\\Uri',
+        'FBURL' => 'Sabre\\VObject\\Property\\Uri',
+        'CAPURI' => 'Sabre\\VObject\\Property\\Uri',
+        'CALURI' => 'Sabre\\VObject\\Property\\Uri',
         'CALADRURI' => 'Sabre\\VObject\\Property\\Uri',
 
         // rfc4770 properties
         'IMPP' => 'Sabre\\VObject\\Property\\Uri',
 
         // vCard 4.0 properties
-        'SOURCE'       => 'Sabre\\VObject\\Property\\Uri',
-        'XML'          => 'Sabre\\VObject\\Property\\FlatText',
-        'ANNIVERSARY'  => 'Sabre\\VObject\\Property\\VCard\\DateAndOrTime',
+        'SOURCE' => 'Sabre\\VObject\\Property\\Uri',
+        'XML' => 'Sabre\\VObject\\Property\\FlatText',
+        'ANNIVERSARY' => 'Sabre\\VObject\\Property\\VCard\\DateAndOrTime',
         'CLIENTPIDMAP' => 'Sabre\\VObject\\Property\\Text',
-        'LANG'         => 'Sabre\\VObject\\Property\\VCard\\LanguageTag',
-        'GENDER'       => 'Sabre\\VObject\\Property\\Text',
-        'KIND'         => 'Sabre\\VObject\\Property\\FlatText',
-        'MEMBER'       => 'Sabre\\VObject\\Property\\Uri',
-        'RELATED'      => 'Sabre\\VObject\\Property\\Uri',
+        'LANG' => 'Sabre\\VObject\\Property\\VCard\\LanguageTag',
+        'GENDER' => 'Sabre\\VObject\\Property\\Text',
+        'KIND' => 'Sabre\\VObject\\Property\\FlatText',
+        'MEMBER' => 'Sabre\\VObject\\Property\\Uri',
+        'RELATED' => 'Sabre\\VObject\\Property\\Uri',
 
         // rfc6474 properties
         'BIRTHPLACE' => 'Sabre\\VObject\\Property\\FlatText',
         'DEATHPLACE' => 'Sabre\\VObject\\Property\\FlatText',
-        'DEATHDATE'  => 'Sabre\\VObject\\Property\\VCard\\DateAndOrTime',
+        'DEATHDATE' => 'Sabre\\VObject\\Property\\VCard\\DateAndOrTime',
 
         // rfc6715 properties
-        'EXPERTISE'     => 'Sabre\\VObject\\Property\\FlatText',
-        'HOBBY'         => 'Sabre\\VObject\\Property\\FlatText',
-        'INTEREST'      => 'Sabre\\VObject\\Property\\FlatText',
+        'EXPERTISE' => 'Sabre\\VObject\\Property\\FlatText',
+        'HOBBY' => 'Sabre\\VObject\\Property\\FlatText',
+        'INTEREST' => 'Sabre\\VObject\\Property\\FlatText',
         'ORG-DIRECTORY' => 'Sabre\\VObject\\Property\\FlatText',
-
     ];
 
     /**
@@ -144,23 +142,22 @@ class VCard extends VObject\Document {
      *
      * @return int
      */
-    function getDocumentType() {
-
+    public function getDocumentType()
+    {
         if (!$this->version) {
-
-            $version = (string)$this->VERSION;
+            $version = (string) $this->VERSION;
 
             switch ($version) {
-                case '2.1' :
+                case '2.1':
                     $this->version = self::VCARD21;
                     break;
-                case '3.0' :
+                case '3.0':
                     $this->version = self::VCARD30;
                     break;
-                case '4.0' :
+                case '4.0':
                     $this->version = self::VCARD40;
                     break;
-                default :
+                default:
                     // We don't want to cache the version if it's unknown,
                     // because we might get a version property in a bit.
                     return self::UNKNOWN;
@@ -168,7 +165,6 @@ class VCard extends VObject\Document {
         }
 
         return $this->version;
-
     }
 
     /**
@@ -185,11 +181,11 @@ class VCard extends VObject\Document {
      *
      * @return VCard
      */
-    function convert($target) {
-
+    public function convert($target)
+    {
         $converter = new VObject\VCardConverter();
-        return $converter->convert($this, $target);
 
+        return $converter->convert($this, $target);
     }
 
     /**
@@ -221,8 +217,8 @@ class VCard extends VObject\Document {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $warnings = [];
 
         $versionMap = [
@@ -232,29 +228,28 @@ class VCard extends VObject\Document {
         ];
 
         $version = $this->select('VERSION');
-        if (count($version) === 1) {
-            $version = (string)$this->VERSION;
-            if ($version !== '2.1' && $version !== '3.0' && $version !== '4.0') {
+        if (1 === count($version)) {
+            $version = (string) $this->VERSION;
+            if ('2.1' !== $version && '3.0' !== $version && '4.0' !== $version) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'Only vcard version 4.0 (RFC6350), version 3.0 (RFC2426) or version 2.1 (icm-vcard-2.1) are supported.',
-                    'node'    => $this,
+                    'node' => $this,
                 ];
                 if ($options & self::REPAIR) {
                     $this->VERSION = $versionMap[self::DEFAULT_VERSION];
                 }
             }
-            if ($version === '2.1' && ($options & self::PROFILE_CARDDAV)) {
+            if ('2.1' === $version && ($options & self::PROFILE_CARDDAV)) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'CardDAV servers are not allowed to accept vCard 2.1.',
-                    'node'    => $this,
+                    'node' => $this,
                 ];
             }
-
         }
         $uid = $this->select('UID');
-        if (count($uid) === 0) {
+        if (0 === count($uid)) {
             if ($options & self::PROFILE_CARDDAV) {
                 // Required for CardDAV
                 $warningLevel = 3;
@@ -269,23 +264,22 @@ class VCard extends VObject\Document {
                 $warningLevel = 1;
             }
             $warnings[] = [
-                'level'   => $warningLevel,
+                'level' => $warningLevel,
                 'message' => $message,
-                'node'    => $this,
+                'node' => $this,
             ];
         }
 
         $fn = $this->select('FN');
-        if (count($fn) !== 1) {
-
+        if (1 !== count($fn)) {
             $repaired = false;
-            if (($options & self::REPAIR) && count($fn) === 0) {
+            if (($options & self::REPAIR) && 0 === count($fn)) {
                 // We're going to try to see if we can use the contents of the
                 // N property.
                 if (isset($this->N)) {
-                    $value = explode(';', (string)$this->N);
+                    $value = explode(';', (string) $this->N);
                     if (isset($value[1]) && $value[1]) {
-                        $this->FN = $value[1] . ' ' . $value[0];
+                        $this->FN = $value[1].' '.$value[0];
                     } else {
                         $this->FN = $value[0];
                     }
@@ -293,20 +287,19 @@ class VCard extends VObject\Document {
 
                 // Otherwise, the ORG property may work
                 } elseif (isset($this->ORG)) {
-                    $this->FN = (string)$this->ORG;
+                    $this->FN = (string) $this->ORG;
                     $repaired = true;
 
                 // Otherwise, the EMAIL property may work
                 } elseif (isset($this->EMAIL)) {
-                    $this->FN = (string)$this->EMAIL;
+                    $this->FN = (string) $this->EMAIL;
                     $repaired = true;
                 }
-
             }
             $warnings[] = [
-                'level'   => $repaired ? 1 : 3,
+                'level' => $repaired ? 1 : 3,
                 'message' => 'The FN property must appear in the VCARD component exactly 1 time',
-                'node'    => $this,
+                'node' => $this,
             ];
         }
 
@@ -314,7 +307,6 @@ class VCard extends VObject\Document {
             parent::validate($options),
             $warnings
         );
-
     }
 
     /**
@@ -332,50 +324,49 @@ class VCard extends VObject\Document {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'ADR'          => '*',
-            'ANNIVERSARY'  => '?',
-            'BDAY'         => '?',
-            'CALADRURI'    => '*',
-            'CALURI'       => '*',
-            'CATEGORIES'   => '*',
+            'ADR' => '*',
+            'ANNIVERSARY' => '?',
+            'BDAY' => '?',
+            'CALADRURI' => '*',
+            'CALURI' => '*',
+            'CATEGORIES' => '*',
             'CLIENTPIDMAP' => '*',
-            'EMAIL'        => '*',
-            'FBURL'        => '*',
-            'IMPP'         => '*',
-            'GENDER'       => '?',
-            'GEO'          => '*',
-            'KEY'          => '*',
-            'KIND'         => '?',
-            'LANG'         => '*',
-            'LOGO'         => '*',
-            'MEMBER'       => '*',
-            'N'            => '?',
-            'NICKNAME'     => '*',
-            'NOTE'         => '*',
-            'ORG'          => '*',
-            'PHOTO'        => '*',
-            'PRODID'       => '?',
-            'RELATED'      => '*',
-            'REV'          => '?',
-            'ROLE'         => '*',
-            'SOUND'        => '*',
-            'SOURCE'       => '*',
-            'TEL'          => '*',
-            'TITLE'        => '*',
-            'TZ'           => '*',
-            'URL'          => '*',
-            'VERSION'      => '1',
-            'XML'          => '*',
+            'EMAIL' => '*',
+            'FBURL' => '*',
+            'IMPP' => '*',
+            'GENDER' => '?',
+            'GEO' => '*',
+            'KEY' => '*',
+            'KIND' => '?',
+            'LANG' => '*',
+            'LOGO' => '*',
+            'MEMBER' => '*',
+            'N' => '?',
+            'NICKNAME' => '*',
+            'NOTE' => '*',
+            'ORG' => '*',
+            'PHOTO' => '*',
+            'PRODID' => '?',
+            'RELATED' => '*',
+            'REV' => '?',
+            'ROLE' => '*',
+            'SOUND' => '*',
+            'SOURCE' => '*',
+            'TEL' => '*',
+            'TITLE' => '*',
+            'TZ' => '*',
+            'URL' => '*',
+            'VERSION' => '1',
+            'XML' => '*',
 
             // FN is commented out, because it's already handled by the
             // validate function, which may also try to repair it.
             // 'FN'           => '+',
             'UID' => '?',
         ];
-
     }
 
     /**
@@ -392,12 +383,11 @@ class VCard extends VObject\Document {
      *
      * @return VObject\Property|null
      */
-    function preferred($propertyName) {
-
+    public function preferred($propertyName)
+    {
         $preferred = null;
         $lastPref = 101;
         foreach ($this->select($propertyName) as $field) {
-
             $pref = 101;
             if (isset($field['TYPE']) && $field['TYPE']->has('PREF')) {
                 $pref = 1;
@@ -409,10 +399,9 @@ class VCard extends VObject\Document {
                 $preferred = $field;
                 $lastPref = $pref;
             }
-
         }
-        return $preferred;
 
+        return $preferred;
     }
 
     /**
@@ -426,7 +415,8 @@ class VCard extends VObject\Document {
      *
      * @return VObject\Property|null
      */
-    function getByType($propertyName, $type) {
+    public function getByType($propertyName, $type)
+    {
         foreach ($this->select($propertyName) as $field) {
             if (isset($field['TYPE']) && $field['TYPE']->has($type)) {
                 return $field;
@@ -439,14 +429,13 @@ class VCard extends VObject\Document {
      *
      * @return array
      */
-    protected function getDefaults() {
-
+    protected function getDefaults()
+    {
         return [
             'VERSION' => '4.0',
-            'PRODID'  => '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN',
-            'UID'     => 'sabre-vobject-' . VObject\UUIDUtil::getUUID(),
+            'PRODID' => '-//Sabre//Sabre VObject '.VObject\Version::VERSION.'//EN',
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
         ];
-
     }
 
     /**
@@ -455,8 +444,8 @@ class VCard extends VObject\Document {
      *
      * @return array
      */
-    function jsonSerialize() {
-
+    public function jsonSerialize()
+    {
         // A vcard does not have sub-components, so we're overriding this
         // method to remove that array element.
         $properties = [];
@@ -469,23 +458,19 @@ class VCard extends VObject\Document {
             strtolower($this->name),
             $properties,
         ];
-
     }
 
     /**
      * This method serializes the data into XML. This is used to create xCard or
      * xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         $propertiesByGroup = [];
 
         foreach ($this->children() as $property) {
-
             $group = $property->group;
 
             if (!isset($propertiesByGroup[$group])) {
@@ -493,25 +478,20 @@ class VCard extends VObject\Document {
             }
 
             $propertiesByGroup[$group][] = $property;
-
         }
 
         $writer->startElement(strtolower($this->name));
 
         foreach ($propertiesByGroup as $group => $properties) {
-
             if (!empty($group)) {
-
                 $writer->startElement('group');
                 $writer->writeAttribute('name', strtolower($group));
-
             }
 
             foreach ($properties as $property) {
                 switch ($property->name) {
-
                     case 'VERSION':
-                        continue;
+                        break;
 
                     case 'XML':
                         $value = $property->getParts();
@@ -522,18 +502,15 @@ class VCard extends VObject\Document {
                     default:
                         $property->xmlSerialize($writer);
                         break;
-
                 }
             }
 
             if (!empty($group)) {
                 $writer->endElement();
             }
-
         }
 
         $writer->endElement();
-
     }
 
     /**
@@ -543,16 +520,15 @@ class VCard extends VObject\Document {
      *
      * @return string
      */
-    function getClassNameForPropertyName($propertyName) {
-
+    public function getClassNameForPropertyName($propertyName)
+    {
         $className = parent::getClassNameForPropertyName($propertyName);
 
         // In vCard 4, BINARY no longer exists, and we need URI instead.
-        if ($className == 'Sabre\\VObject\\Property\\Binary' && $this->getDocumentType() === self::VCARD40) {
+        if ('Sabre\\VObject\\Property\\Binary' == $className && self::VCARD40 === $this->getDocumentType()) {
             return 'Sabre\\VObject\\Property\\Uri';
         }
-        return $className;
 
+        return $className;
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Component/VEvent.php b/vendor/sabre/vobject/lib/Component/VEvent.php
index 7f6861190..09f37033c 100644
--- a/vendor/sabre/vobject/lib/Component/VEvent.php
+++ b/vendor/sabre/vobject/lib/Component/VEvent.php
@@ -16,8 +16,8 @@ use Sabre\VObject\Recur\NoInstancesException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VEvent extends VObject\Component {
-
+class VEvent extends VObject\Component
+{
     /**
      * Returns true or false depending on if the event falls in the specified
      * time-range. This is used for filtering purposes.
@@ -30,20 +30,15 @@ class VEvent extends VObject\Component {
      *
      * @return bool
      */
-    function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end) {
-
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
         if ($this->RRULE) {
-
             try {
-
                 $it = new EventIterator($this, null, $start->getTimezone());
-
             } catch (NoInstancesException $e) {
-
                 // If we've catched this exception, there are no instances
                 // for the event that fall into the specified time-range.
                 return false;
-
             }
 
             $it->fastForward($start);
@@ -54,13 +49,11 @@ class VEvent extends VObject\Component {
             //
             // If the starttime of the recurrence did not exceed the
             // end of the time range as well, we have a match.
-            return ($it->getDTStart() < $end && $it->getDTEnd() > $start);
-
+            return $it->getDTStart() < $end && $it->getDTEnd() > $start;
         }
 
         $effectiveStart = $this->DTSTART->getDateTime($start->getTimezone());
         if (isset($this->DTEND)) {
-
             // The DTEND property is considered non inclusive. So for a 3 day
             // event in july, dtstart and dtend would have to be July 1st and
             // July 4th respectively.
@@ -68,7 +61,6 @@ class VEvent extends VObject\Component {
             // See:
             // http://tools.ietf.org/html/rfc5545#page-54
             $effectiveEnd = $this->DTEND->getDateTime($end->getTimezone());
-
         } elseif (isset($this->DURATION)) {
             $effectiveEnd = $effectiveStart->add(VObject\DateTimeParser::parseDuration($this->DURATION));
         } elseif (!$this->DTSTART->hasTime()) {
@@ -76,10 +68,10 @@ class VEvent extends VObject\Component {
         } else {
             $effectiveEnd = $effectiveStart;
         }
-        return (
-            ($start < $effectiveEnd) && ($end > $effectiveStart)
-        );
 
+        return
+            ($start < $effectiveEnd) && ($end > $effectiveStart)
+        ;
     }
 
     /**
@@ -87,13 +79,12 @@ class VEvent extends VObject\Component {
      *
      * @return array
      */
-    protected function getDefaults() {
-
+    protected function getDefaults()
+    {
         return [
-            'UID'     => 'sabre-vobject-' . VObject\UUIDUtil::getUUID(),
-            'DTSTAMP' => date('Ymd\\THis\\Z'),
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
+            'DTSTAMP' => gmdate('Ymd\\THis\\Z'),
         ];
-
     }
 
     /**
@@ -111,43 +102,42 @@ class VEvent extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         $hasMethod = isset($this->parent->METHOD);
+
         return [
-            'UID'           => 1,
-            'DTSTAMP'       => 1,
-            'DTSTART'       => $hasMethod ? '?' : '1',
-            'CLASS'         => '?',
-            'CREATED'       => '?',
-            'DESCRIPTION'   => '?',
-            'GEO'           => '?',
+            'UID' => 1,
+            'DTSTAMP' => 1,
+            'DTSTART' => $hasMethod ? '?' : '1',
+            'CLASS' => '?',
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
+            'GEO' => '?',
             'LAST-MODIFIED' => '?',
-            'LOCATION'      => '?',
-            'ORGANIZER'     => '?',
-            'PRIORITY'      => '?',
-            'SEQUENCE'      => '?',
-            'STATUS'        => '?',
-            'SUMMARY'       => '?',
-            'TRANSP'        => '?',
-            'URL'           => '?',
+            'LOCATION' => '?',
+            'ORGANIZER' => '?',
+            'PRIORITY' => '?',
+            'SEQUENCE' => '?',
+            'STATUS' => '?',
+            'SUMMARY' => '?',
+            'TRANSP' => '?',
+            'URL' => '?',
             'RECURRENCE-ID' => '?',
-            'RRULE'         => '?',
-            'DTEND'         => '?',
-            'DURATION'      => '?',
-
-            'ATTACH'         => '*',
-            'ATTENDEE'       => '*',
-            'CATEGORIES'     => '*',
-            'COMMENT'        => '*',
-            'CONTACT'        => '*',
-            'EXDATE'         => '*',
+            'RRULE' => '?',
+            'DTEND' => '?',
+            'DURATION' => '?',
+
+            'ATTACH' => '*',
+            'ATTENDEE' => '*',
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+            'EXDATE' => '*',
             'REQUEST-STATUS' => '*',
-            'RELATED-TO'     => '*',
-            'RESOURCES'      => '*',
-            'RDATE'          => '*',
+            'RELATED-TO' => '*',
+            'RESOURCES' => '*',
+            'RDATE' => '*',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Component/VFreeBusy.php b/vendor/sabre/vobject/lib/Component/VFreeBusy.php
index 72294cc9f..558a85233 100644
--- a/vendor/sabre/vobject/lib/Component/VFreeBusy.php
+++ b/vendor/sabre/vobject/lib/Component/VFreeBusy.php
@@ -15,8 +15,8 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VFreeBusy extends VObject\Component {
-
+class VFreeBusy extends VObject\Component
+{
     /**
      * Checks based on the contained FREEBUSY information, if a timeslot is
      * available.
@@ -26,19 +26,18 @@ class VFreeBusy extends VObject\Component {
      *
      * @return bool
      */
-    function isFree(DateTimeInterface $start, DatetimeInterface $end) {
-
+    public function isFree(DateTimeInterface $start, DatetimeInterface $end)
+    {
         foreach ($this->select('FREEBUSY') as $freebusy) {
-
             // We are only interested in FBTYPE=BUSY (the default),
             // FBTYPE=BUSY-TENTATIVE or FBTYPE=BUSY-UNAVAILABLE.
-            if (isset($freebusy['FBTYPE']) && strtoupper(substr((string)$freebusy['FBTYPE'], 0, 4)) !== 'BUSY') {
+            if (isset($freebusy['FBTYPE']) && 'BUSY' !== strtoupper(substr((string) $freebusy['FBTYPE'], 0, 4))) {
                 continue;
             }
 
             // The freebusy component can hold more than 1 value, separated by
             // commas.
-            $periods = explode(',', (string)$freebusy);
+            $periods = explode(',', (string) $freebusy);
 
             foreach ($periods as $period) {
                 // Every period is formatted as [start]/[end]. The start is an
@@ -55,13 +54,10 @@ class VFreeBusy extends VObject\Component {
                 if ($start < $busyEnd && $end > $busyStart) {
                     return false;
                 }
-
             }
-
         }
 
         return true;
-
     }
 
     /**
@@ -79,24 +75,22 @@ class VFreeBusy extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'UID'     => 1,
+            'UID' => 1,
             'DTSTAMP' => 1,
 
-            'CONTACT'   => '?',
-            'DTSTART'   => '?',
-            'DTEND'     => '?',
+            'CONTACT' => '?',
+            'DTSTART' => '?',
+            'DTEND' => '?',
             'ORGANIZER' => '?',
-            'URL'       => '?',
+            'URL' => '?',
 
-            'ATTENDEE'       => '*',
-            'COMMENT'        => '*',
-            'FREEBUSY'       => '*',
+            'ATTENDEE' => '*',
+            'COMMENT' => '*',
+            'FREEBUSY' => '*',
             'REQUEST-STATUS' => '*',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Component/VJournal.php b/vendor/sabre/vobject/lib/Component/VJournal.php
index a1b1a863d..9bd336776 100644
--- a/vendor/sabre/vobject/lib/Component/VJournal.php
+++ b/vendor/sabre/vobject/lib/Component/VJournal.php
@@ -14,8 +14,8 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VJournal extends VObject\Component {
-
+class VJournal extends VObject\Component
+{
     /**
      * Returns true or false depending on if the event falls in the specified
      * time-range. This is used for filtering purposes.
@@ -28,8 +28,8 @@ class VJournal extends VObject\Component {
      *
      * @return bool
      */
-    function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end) {
-
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
         $dtstart = isset($this->DTSTART) ? $this->DTSTART->getDateTime() : null;
         if ($dtstart) {
             $effectiveEnd = $dtstart;
@@ -37,11 +37,10 @@ class VJournal extends VObject\Component {
                 $effectiveEnd = $effectiveEnd->modify('+1 day');
             }
 
-            return ($start <= $effectiveEnd && $end > $dtstart);
-
+            return $start <= $effectiveEnd && $end > $dtstart;
         }
-        return false;
 
+        return false;
     }
 
     /**
@@ -59,36 +58,35 @@ class VJournal extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'UID'     => 1,
+            'UID' => 1,
             'DTSTAMP' => 1,
 
-            'CLASS'         => '?',
-            'CREATED'       => '?',
-            'DTSTART'       => '?',
+            'CLASS' => '?',
+            'CREATED' => '?',
+            'DTSTART' => '?',
             'LAST-MODIFIED' => '?',
-            'ORGANIZER'     => '?',
+            'ORGANIZER' => '?',
             'RECURRENCE-ID' => '?',
-            'SEQUENCE'      => '?',
-            'STATUS'        => '?',
-            'SUMMARY'       => '?',
-            'URL'           => '?',
+            'SEQUENCE' => '?',
+            'STATUS' => '?',
+            'SUMMARY' => '?',
+            'URL' => '?',
 
             'RRULE' => '?',
 
-            'ATTACH'      => '*',
-            'ATTENDEE'    => '*',
-            'CATEGORIES'  => '*',
-            'COMMENT'     => '*',
-            'CONTACT'     => '*',
+            'ATTACH' => '*',
+            'ATTENDEE' => '*',
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
             'DESCRIPTION' => '*',
-            'EXDATE'      => '*',
-            'RELATED-TO'  => '*',
-            'RDATE'       => '*',
+            'EXDATE' => '*',
+            'RELATED-TO' => '*',
+            'RDATE' => '*',
         ];
-
     }
 
     /**
@@ -96,12 +94,11 @@ class VJournal extends VObject\Component {
      *
      * @return array
      */
-    protected function getDefaults() {
-
+    protected function getDefaults()
+    {
         return [
-            'UID'     => 'sabre-vobject-' . VObject\UUIDUtil::getUUID(),
-            'DTSTAMP' => date('Ymd\\THis\\Z'),
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
+            'DTSTAMP' => gmdate('Ymd\\THis\\Z'),
         ];
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Component/VTimeZone.php b/vendor/sabre/vobject/lib/Component/VTimeZone.php
index f6eb6cba1..21c062377 100644
--- a/vendor/sabre/vobject/lib/Component/VTimeZone.php
+++ b/vendor/sabre/vobject/lib/Component/VTimeZone.php
@@ -14,8 +14,8 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VTimeZone extends VObject\Component {
-
+class VTimeZone extends VObject\Component
+{
     /**
      * Returns the PHP DateTimeZone for this VTIMEZONE component.
      *
@@ -24,10 +24,9 @@ class VTimeZone extends VObject\Component {
      *
      * @return \DateTimeZone
      */
-    function getTimeZone() {
-
-        return VObject\TimeZoneUtil::getTimeZone((string)$this->TZID, $this->root);
-
+    public function getTimeZone()
+    {
+        return VObject\TimeZoneUtil::getTimeZone((string) $this->TZID, $this->root);
     }
 
     /**
@@ -45,13 +44,13 @@ class VTimeZone extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
             'TZID' => 1,
 
             'LAST-MODIFIED' => '?',
-            'TZURL'         => '?',
+            'TZURL' => '?',
 
             // At least 1 STANDARD or DAYLIGHT must appear.
             //
@@ -60,7 +59,5 @@ class VTimeZone extends VObject\Component {
             'STANDARD' => '*',
             'DAYLIGHT' => '*',
         ];
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Component/VTodo.php b/vendor/sabre/vobject/lib/Component/VTodo.php
index 144ced694..9de77e841 100644
--- a/vendor/sabre/vobject/lib/Component/VTodo.php
+++ b/vendor/sabre/vobject/lib/Component/VTodo.php
@@ -14,8 +14,8 @@ use Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VTodo extends VObject\Component {
-
+class VTodo extends VObject\Component
+{
     /**
      * Returns true or false depending on if the event falls in the specified
      * time-range. This is used for filtering purposes.
@@ -28,8 +28,8 @@ class VTodo extends VObject\Component {
      *
      * @return bool
      */
-    function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end) {
-
+    public function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end)
+    {
         $dtstart = isset($this->DTSTART) ? $this->DTSTART->getDateTime() : null;
         $duration = isset($this->DURATION) ? VObject\DateTimeParser::parseDuration($this->DURATION) : null;
         $due = isset($this->DUE) ? $this->DUE->getDateTime() : null;
@@ -39,6 +39,7 @@ class VTodo extends VObject\Component {
         if ($dtstart) {
             if ($duration) {
                 $effectiveEnd = $dtstart->add($duration);
+
                 return $start <= $effectiveEnd && $end > $dtstart;
             } elseif ($due) {
                 return
@@ -49,7 +50,7 @@ class VTodo extends VObject\Component {
             }
         }
         if ($due) {
-            return ($start < $due && $end >= $due);
+            return $start < $due && $end >= $due;
         }
         if ($completed && $created) {
             return
@@ -57,13 +58,13 @@ class VTodo extends VObject\Component {
                 ($end >= $created || $end >= $completed);
         }
         if ($completed) {
-            return ($start <= $completed && $end >= $completed);
+            return $start <= $completed && $end >= $completed;
         }
         if ($created) {
-            return ($end > $created);
+            return $end > $created;
         }
-        return true;
 
+        return true;
     }
 
     /**
@@ -81,45 +82,44 @@ class VTodo extends VObject\Component {
      *
      * @var array
      */
-    function getValidationRules() {
-
+    public function getValidationRules()
+    {
         return [
-            'UID'     => 1,
+            'UID' => 1,
             'DTSTAMP' => 1,
 
-            'CLASS'         => '?',
-            'COMPLETED'     => '?',
-            'CREATED'       => '?',
-            'DESCRIPTION'   => '?',
-            'DTSTART'       => '?',
-            'GEO'           => '?',
+            'CLASS' => '?',
+            'COMPLETED' => '?',
+            'CREATED' => '?',
+            'DESCRIPTION' => '?',
+            'DTSTART' => '?',
+            'GEO' => '?',
             'LAST-MODIFIED' => '?',
-            'LOCATION'      => '?',
-            'ORGANIZER'     => '?',
-            'PERCENT'       => '?',
-            'PRIORITY'      => '?',
+            'LOCATION' => '?',
+            'ORGANIZER' => '?',
+            'PERCENT' => '?',
+            'PRIORITY' => '?',
             'RECURRENCE-ID' => '?',
-            'SEQUENCE'      => '?',
-            'STATUS'        => '?',
-            'SUMMARY'       => '?',
-            'URL'           => '?',
+            'SEQUENCE' => '?',
+            'STATUS' => '?',
+            'SUMMARY' => '?',
+            'URL' => '?',
 
-            'RRULE'    => '?',
-            'DUE'      => '?',
+            'RRULE' => '?',
+            'DUE' => '?',
             'DURATION' => '?',
 
-            'ATTACH'         => '*',
-            'ATTENDEE'       => '*',
-            'CATEGORIES'     => '*',
-            'COMMENT'        => '*',
-            'CONTACT'        => '*',
-            'EXDATE'         => '*',
+            'ATTACH' => '*',
+            'ATTENDEE' => '*',
+            'CATEGORIES' => '*',
+            'COMMENT' => '*',
+            'CONTACT' => '*',
+            'EXDATE' => '*',
             'REQUEST-STATUS' => '*',
-            'RELATED-TO'     => '*',
-            'RESOURCES'      => '*',
-            'RDATE'          => '*',
+            'RELATED-TO' => '*',
+            'RESOURCES' => '*',
+            'RDATE' => '*',
         ];
-
     }
 
     /**
@@ -144,36 +144,29 @@ class VTodo extends VObject\Component {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $result = parent::validate($options);
         if (isset($this->DUE) && isset($this->DTSTART)) {
-
             $due = $this->DUE;
             $dtStart = $this->DTSTART;
 
             if ($due->getValueType() !== $dtStart->getValueType()) {
-
                 $result[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'The value type (DATE or DATE-TIME) must be identical for DUE and DTSTART',
-                    'node'    => $due,
+                    'node' => $due,
                 ];
-
             } elseif ($due->getDateTime() < $dtStart->getDateTime()) {
-
                 $result[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'DUE must occur after DTSTART',
-                    'node'    => $due,
+                    'node' => $due,
                 ];
-
             }
-
         }
 
         return $result;
-
     }
 
     /**
@@ -181,13 +174,11 @@ class VTodo extends VObject\Component {
      *
      * @return array
      */
-    protected function getDefaults() {
-
+    protected function getDefaults()
+    {
         return [
-            'UID'     => 'sabre-vobject-' . VObject\UUIDUtil::getUUID(),
+            'UID' => 'sabre-vobject-'.VObject\UUIDUtil::getUUID(),
             'DTSTAMP' => date('Ymd\\THis\\Z'),
         ];
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/DateTimeParser.php b/vendor/sabre/vobject/lib/DateTimeParser.php
index f9a802d25..1c253437a 100644
--- a/vendor/sabre/vobject/lib/DateTimeParser.php
+++ b/vendor/sabre/vobject/lib/DateTimeParser.php
@@ -16,8 +16,8 @@ use DateTimeZone;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class DateTimeParser {
-
+class DateTimeParser
+{
     /**
      * Parses an iCalendar (rfc5545) formatted datetime and returns a
      * DateTimeImmutable object.
@@ -26,49 +26,48 @@ class DateTimeParser {
      * if the non-UTC format is used. The argument is used as a reference, the
      * returned DateTimeImmutable object will still be in the UTC timezone.
      *
-     * @param string $dt
+     * @param string       $dt
      * @param DateTimeZone $tz
      *
      * @return DateTimeImmutable
      */
-    static function parseDateTime($dt, DateTimeZone $tz = null) {
-
+    public static function parseDateTime($dt, DateTimeZone $tz = null)
+    {
         // Format is YYYYMMDD + "T" + hhmmss
         $result = preg_match('/^([0-9]{4})([0-1][0-9])([0-3][0-9])T([0-2][0-9])([0-5][0-9])([0-5][0-9])([Z]?)$/', $dt, $matches);
 
         if (!$result) {
-            throw new InvalidDataException('The supplied iCalendar datetime value is incorrect: ' . $dt);
+            throw new InvalidDataException('The supplied iCalendar datetime value is incorrect: '.$dt);
         }
 
-        if ($matches[7] === 'Z' || is_null($tz)) {
+        if ('Z' === $matches[7] || is_null($tz)) {
             $tz = new DateTimeZone('UTC');
         }
 
         try {
-            $date = new DateTimeImmutable($matches[1] . '-' . $matches[2] . '-' . $matches[3] . ' ' . $matches[4] . ':' . $matches[5] . ':' . $matches[6], $tz);
+            $date = new DateTimeImmutable($matches[1].'-'.$matches[2].'-'.$matches[3].' '.$matches[4].':'.$matches[5].':'.$matches[6], $tz);
         } catch (\Exception $e) {
-            throw new InvalidDataException('The supplied iCalendar datetime value is incorrect: ' . $dt);
+            throw new InvalidDataException('The supplied iCalendar datetime value is incorrect: '.$dt);
         }
 
         return $date;
-
     }
 
     /**
      * Parses an iCalendar (rfc5545) formatted date and returns a DateTimeImmutable object.
      *
-     * @param string $date
+     * @param string       $date
      * @param DateTimeZone $tz
      *
      * @return DateTimeImmutable
      */
-    static function parseDate($date, DateTimeZone $tz = null) {
-
+    public static function parseDate($date, DateTimeZone $tz = null)
+    {
         // Format is YYYYMMDD
         $result = preg_match('/^([0-9]{4})([0-1][0-9])([0-3][0-9])$/', $date, $matches);
 
         if (!$result) {
-            throw new InvalidDataException('The supplied iCalendar date value is incorrect: ' . $date);
+            throw new InvalidDataException('The supplied iCalendar date value is incorrect: '.$date);
         }
 
         if (is_null($tz)) {
@@ -76,13 +75,12 @@ class DateTimeParser {
         }
 
         try {
-            $date = new DateTimeImmutable($matches[1] . '-' . $matches[2] . '-' . $matches[3], $tz);
+            $date = new DateTimeImmutable($matches[1].'-'.$matches[2].'-'.$matches[3], $tz);
         } catch (\Exception $e) {
-            throw new InvalidDataException('The supplied iCalendar date value is incorrect: ' . $date);
+            throw new InvalidDataException('The supplied iCalendar date value is incorrect: '.$date);
         }
 
         return $date;
-
     }
 
     /**
@@ -92,22 +90,21 @@ class DateTimeParser {
      * suitable for strtotime or DateTime::modify.
      *
      * @param string $duration
-     * @param bool $asString
+     * @param bool   $asString
      *
      * @return DateInterval|string
      */
-    static function parseDuration($duration, $asString = false) {
-
+    public static function parseDuration($duration, $asString = false)
+    {
         $result = preg_match('/^(?<plusminus>\+|-)?P((?<week>\d+)W)?((?<day>\d+)D)?(T((?<hour>\d+)H)?((?<minute>\d+)M)?((?<second>\d+)S)?)?$/', $duration, $matches);
         if (!$result) {
-            throw new InvalidDataException('The supplied iCalendar duration value is incorrect: ' . $duration);
+            throw new InvalidDataException('The supplied iCalendar duration value is incorrect: '.$duration);
         }
 
         if (!$asString) {
-
             $invert = false;
 
-            if ($matches['plusminus'] === '-') {
+            if ('-' === $matches['plusminus']) {
                 $invert = true;
             }
 
@@ -120,7 +117,7 @@ class DateTimeParser {
             ];
 
             foreach ($parts as $part) {
-                $matches[$part] = isset($matches[$part]) && $matches[$part] ? (int)$matches[$part] : 0;
+                $matches[$part] = isset($matches[$part]) && $matches[$part] ? (int) $matches[$part] : 0;
             }
 
             // We need to re-construct the $duration string, because weeks and
@@ -133,28 +130,26 @@ class DateTimeParser {
             }
 
             if ($days) {
-                $duration .= $days . 'D';
+                $duration .= $days.'D';
             }
 
             if ($matches['minute'] || $matches['second'] || $matches['hour']) {
-
                 $duration .= 'T';
 
                 if ($matches['hour']) {
-                    $duration .= $matches['hour'] . 'H';
+                    $duration .= $matches['hour'].'H';
                 }
 
                 if ($matches['minute']) {
-                    $duration .= $matches['minute'] . 'M';
+                    $duration .= $matches['minute'].'M';
                 }
 
                 if ($matches['second']) {
-                    $duration .= $matches['second'] . 'S';
+                    $duration .= $matches['second'].'S';
                 }
-
             }
 
-            if ($duration === 'P') {
+            if ('P' === $duration) {
                 $duration = 'PT0S';
             }
 
@@ -165,7 +160,6 @@ class DateTimeParser {
             }
 
             return $iv;
-
         }
 
         $parts = [
@@ -180,38 +174,36 @@ class DateTimeParser {
 
         foreach ($parts as $part) {
             if (isset($matches[$part]) && $matches[$part]) {
-                $newDur .= ' ' . $matches[$part] . ' ' . $part . 's';
+                $newDur .= ' '.$matches[$part].' '.$part.'s';
             }
         }
 
-        $newDur = ($matches['plusminus'] === '-' ? '-' : '+') . trim($newDur);
+        $newDur = ('-' === $matches['plusminus'] ? '-' : '+').trim($newDur);
 
-        if ($newDur === '+') {
+        if ('+' === $newDur) {
             $newDur = '+0 seconds';
-        };
+        }
 
         return $newDur;
-
     }
 
     /**
      * Parses either a Date or DateTime, or Duration value.
      *
-     * @param string $date
+     * @param string              $date
      * @param DateTimeZone|string $referenceTz
      *
      * @return DateTimeImmutable|DateInterval
      */
-    static function parse($date, $referenceTz = null) {
-
-        if ($date[0] === 'P' || ($date[0] === '-' && $date[1] === 'P')) {
+    public static function parse($date, $referenceTz = null)
+    {
+        if ('P' === $date[0] || ('-' === $date[0] && 'P' === $date[1])) {
             return self::parseDuration($date);
-        } elseif (strlen($date) === 8) {
+        } elseif (8 === strlen($date)) {
             return self::parseDate($date, $referenceTz);
         } else {
             return self::parseDateTime($date, $referenceTz);
         }
-
     }
 
     /**
@@ -270,8 +262,8 @@ class DateTimeParser {
      *
      * @return array
      */
-    static function parseVCardDateTime($date) {
-
+    public static function parseVCardDateTime($date)
+    {
         $regex = '/^
             (?:  # date part
                 (?:
@@ -296,7 +288,6 @@ class DateTimeParser {
             $/x';
 
         if (!preg_match($regex, $date, $matches)) {
-
             // Attempting to parse the extended format.
             $regex = '/^
                 (?: # date part
@@ -321,9 +312,8 @@ class DateTimeParser {
                 $/x';
 
             if (!preg_match($regex, $date, $matches)) {
-                throw new InvalidDataException('Invalid vCard date-time string: ' . $date);
+                throw new InvalidDataException('Invalid vCard date-time string: '.$date);
             }
-
         }
         $parts = [
             'year',
@@ -332,24 +322,21 @@ class DateTimeParser {
             'hour',
             'minute',
             'second',
-            'timezone'
+            'timezone',
         ];
 
         $result = [];
         foreach ($parts as $part) {
-
             if (empty($matches[$part])) {
                 $result[$part] = null;
-            } elseif ($matches[$part] === '-' || $matches[$part] === '--') {
+            } elseif ('-' === $matches[$part] || '--' === $matches[$part]) {
                 $result[$part] = null;
             } else {
                 $result[$part] = $matches[$part];
             }
-
         }
 
         return $result;
-
     }
 
     /**
@@ -394,8 +381,8 @@ class DateTimeParser {
      *
      * @return array
      */
-    static function parseVCardTime($date) {
-
+    public static function parseVCardTime($date)
+    {
         $regex = '/^
             (?<hour> [0-9]{2} | -)
             (?<minute> [0-9]{2} | -)?
@@ -409,9 +396,7 @@ class DateTimeParser {
             )?
             $/x';
 
-
         if (!preg_match($regex, $date, $matches)) {
-
             // Attempting to parse the extended format.
             $regex = '/^
                 (?: (?<hour> [0-9]{2}) : | -)
@@ -427,32 +412,28 @@ class DateTimeParser {
                 $/x';
 
             if (!preg_match($regex, $date, $matches)) {
-                throw new InvalidDataException('Invalid vCard time string: ' . $date);
+                throw new InvalidDataException('Invalid vCard time string: '.$date);
             }
-
         }
         $parts = [
             'hour',
             'minute',
             'second',
-            'timezone'
+            'timezone',
         ];
 
         $result = [];
         foreach ($parts as $part) {
-
             if (empty($matches[$part])) {
                 $result[$part] = null;
-            } elseif ($matches[$part] === '-') {
+            } elseif ('-' === $matches[$part]) {
                 $result[$part] = null;
             } else {
                 $result[$part] = $matches[$part];
             }
-
         }
 
         return $result;
-
     }
 
     /**
@@ -506,32 +487,32 @@ class DateTimeParser {
      *
      * @return array
      */
-    static function parseVCardDateAndOrTime($date) {
-
+    public static function parseVCardDateAndOrTime($date)
+    {
         // \d{8}|\d{4}-\d\d|--\d\d(\d\d)?|---\d\d
-        $valueDate = '/^(?J)(?:' .
-                         '(?<year>\d{4})(?<month>\d\d)(?<date>\d\d)' .
-                         '|(?<year>\d{4})-(?<month>\d\d)' .
-                         '|--(?<month>\d\d)(?<date>\d\d)?' .
-                         '|---(?<date>\d\d)' .
+        $valueDate = '/^(?J)(?:'.
+                         '(?<year>\d{4})(?<month>\d\d)(?<date>\d\d)'.
+                         '|(?<year>\d{4})-(?<month>\d\d)'.
+                         '|--(?<month>\d\d)(?<date>\d\d)?'.
+                         '|---(?<date>\d\d)'.
                          ')$/';
 
         // (\d\d(\d\d(\d\d)?)?|-\d\d(\d\d)?|--\d\d)(Z|[+\-]\d\d(\d\d)?)?
-        $valueTime = '/^(?J)(?:' .
-                         '((?<hour>\d\d)((?<minute>\d\d)(?<second>\d\d)?)?' .
-                         '|-(?<minute>\d\d)(?<second>\d\d)?' .
-                         '|--(?<second>\d\d))' .
-                         '(?<timezone>(Z|[+\-]\d\d(\d\d)?))?' .
+        $valueTime = '/^(?J)(?:'.
+                         '((?<hour>\d\d)((?<minute>\d\d)(?<second>\d\d)?)?'.
+                         '|-(?<minute>\d\d)(?<second>\d\d)?'.
+                         '|--(?<second>\d\d))'.
+                         '(?<timezone>(Z|[+\-]\d\d(\d\d)?))?'.
                          ')$/';
 
         // (\d{8}|--\d{4}|---\d\d)T\d\d(\d\d(\d\d)?)?(Z|[+\-]\d\d(\d\d?)?
-        $valueDateTime = '/^(?:' .
-                         '((?<year0>\d{4})(?<month0>\d\d)(?<date0>\d\d)' .
-                         '|--(?<month1>\d\d)(?<date1>\d\d)' .
-                         '|---(?<date2>\d\d))' .
-                         'T' .
-                         '(?<hour>\d\d)((?<minute>\d\d)(?<second>\d\d)?)?' .
-                         '(?<timezone>(Z|[+\-]\d\d(\d\d?)))?' .
+        $valueDateTime = '/^(?:'.
+                         '((?<year0>\d{4})(?<month0>\d\d)(?<date0>\d\d)'.
+                         '|--(?<month1>\d\d)(?<date1>\d\d)'.
+                         '|---(?<date2>\d\d))'.
+                         'T'.
+                         '(?<hour>\d\d)((?<minute>\d\d)(?<second>\d\d)?)?'.
+                         '(?<timezone>(Z|[+\-]\d\d(\d\d?)))?'.
                          ')$/';
 
         // date-and-or-time is date | date-time | time
@@ -540,17 +521,17 @@ class DateTimeParser {
         if (0 === preg_match($valueDate, $date, $matches)
             && 0 === preg_match($valueDateTime, $date, $matches)
             && 0 === preg_match($valueTime, $date, $matches)) {
-            throw new InvalidDataException('Invalid vCard date-time string: ' . $date);
+            throw new InvalidDataException('Invalid vCard date-time string: '.$date);
         }
 
         $parts = [
-            'year'     => null,
-            'month'    => null,
-            'date'     => null,
-            'hour'     => null,
-            'minute'   => null,
-            'second'   => null,
-            'timezone' => null
+            'year' => null,
+            'month' => null,
+            'date' => null,
+            'hour' => null,
+            'minute' => null,
+            'second' => null,
+            'timezone' => null,
         ];
 
         // The $valueDateTime expression has a bug with (?J) so we simulate it.
@@ -575,6 +556,5 @@ class DateTimeParser {
         unset($parts['year0']);
 
         return $parts;
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Document.php b/vendor/sabre/vobject/lib/Document.php
index 03252ab06..0cb2e0978 100644
--- a/vendor/sabre/vobject/lib/Document.php
+++ b/vendor/sabre/vobject/lib/Document.php
@@ -16,8 +16,8 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Document extends Component {
-
+abstract class Document extends Component
+{
     /**
      * Unknown document type.
      */
@@ -55,28 +55,28 @@ abstract class Document extends Component {
      *
      * @var string
      */
-    static $defaultName;
+    public static $defaultName;
 
     /**
      * List of properties, and which classes they map to.
      *
      * @var array
      */
-    static $propertyMap = [];
+    public static $propertyMap = [];
 
     /**
      * List of components, along with which classes they map to.
      *
      * @var array
      */
-    static $componentMap = [];
+    public static $componentMap = [];
 
     /**
      * List of value-types, and which classes they map to.
      *
      * @var array
      */
-    static $valueMap = [];
+    public static $valueMap = [];
 
     /**
      * Creates a new document.
@@ -91,20 +91,20 @@ abstract class Document extends Component {
      *
      * new Document(array $children = [], $defaults = true);
      * new Document(string $name, array $children = [], $defaults = true)
-     *
-     * @return void
      */
-    function __construct() {
-
+    public function __construct()
+    {
         $args = func_get_args();
-        if (count($args) === 0 || is_array($args[0])) {
-            array_unshift($args, $this, static::$defaultName);
-            call_user_func_array(['parent', '__construct'], $args);
+        $name = static::$defaultName;
+        if (0 === count($args) || is_array($args[0])) {
+            $children = isset($args[0]) ? $args[0] : [];
+            $defaults = isset($args[1]) ? $args[1] : true;
         } else {
-            array_unshift($args, $this);
-            call_user_func_array(['parent', '__construct'], $args);
+            $name = $args[0];
+            $children = isset($args[1]) ? $args[1] : [];
+            $defaults = isset($args[2]) ? $args[2] : true;
         }
-
+        parent::__construct($this, $name, $children, $defaults);
     }
 
     /**
@@ -112,10 +112,9 @@ abstract class Document extends Component {
      *
      * @return int
      */
-    function getDocumentType() {
-
+    public function getDocumentType()
+    {
         return self::UNKNOWN;
-
     }
 
     /**
@@ -129,18 +128,13 @@ abstract class Document extends Component {
      *
      * @return mixed
      */
-    function create($name) {
-
+    public function create($name)
+    {
         if (isset(static::$componentMap[strtoupper($name)])) {
-
             return call_user_func_array([$this, 'createComponent'], func_get_args());
-
         } else {
-
             return call_user_func_array([$this, 'createProperty'], func_get_args());
-
         }
-
     }
 
     /**
@@ -158,22 +152,24 @@ abstract class Document extends Component {
      * ensure that this does not happen, set $defaults to false.
      *
      * @param string $name
-     * @param array $children
-     * @param bool $defaults
+     * @param array  $children
+     * @param bool   $defaults
      *
      * @return Component
      */
-    function createComponent($name, array $children = null, $defaults = true) {
-
+    public function createComponent($name, array $children = null, $defaults = true)
+    {
         $name = strtoupper($name);
         $class = 'Sabre\\VObject\\Component';
 
         if (isset(static::$componentMap[$name])) {
             $class = static::$componentMap[$name];
         }
-        if (is_null($children)) $children = [];
-        return new $class($this, $name, $children, $defaults);
+        if (is_null($children)) {
+            $children = [];
+        }
 
+        return new $class($this, $name, $children, $defaults);
     }
 
     /**
@@ -187,16 +183,16 @@ abstract class Document extends Component {
      * Parameter objects.
      *
      * @param string $name
-     * @param mixed $value
-     * @param array $parameters
-     * @param string $valueType Force a specific valuetype, such as URI or TEXT
+     * @param mixed  $value
+     * @param array  $parameters
+     * @param string $valueType  Force a specific valuetype, such as URI or TEXT
      *
      * @return Property
      */
-    function createProperty($name, $value = null, array $parameters = null, $valueType = null) {
-
+    public function createProperty($name, $value = null, array $parameters = null, $valueType = null)
+    {
         // If there's a . in the name, it means it's prefixed by a groupname.
-        if (($i = strpos($name, '.')) !== false) {
+        if (false !== ($i = strpos($name, '.'))) {
             $group = substr($name, 0, $i);
             $name = strtoupper(substr($name, $i + 1));
         } else {
@@ -217,17 +213,17 @@ abstract class Document extends Component {
             if (isset($parameters['VALUE'])) {
                 $class = $this->getClassNameForPropertyValue($parameters['VALUE']);
                 if (is_null($class)) {
-                    throw new InvalidDataException('Unsupported VALUE parameter for ' . $name . ' property. You supplied "' . $parameters['VALUE'] . '"');
+                    throw new InvalidDataException('Unsupported VALUE parameter for '.$name.' property. You supplied "'.$parameters['VALUE'].'"');
                 }
-            }
-            else {
+            } else {
                 $class = $this->getClassNameForPropertyName($name);
             }
         }
-        if (is_null($parameters)) $parameters = [];
+        if (is_null($parameters)) {
+            $parameters = [];
+        }
 
         return new $class($this, $name, $value, $parameters, $group);
-
     }
 
     /**
@@ -239,15 +235,15 @@ abstract class Document extends Component {
      * This method returns null if we don't have a specialized class.
      *
      * @param string $valueParam
+     *
      * @return string|null
      */
-    function getClassNameForPropertyValue($valueParam) {
-
+    public function getClassNameForPropertyValue($valueParam)
+    {
         $valueParam = strtoupper($valueParam);
         if (isset(static::$valueMap[$valueParam])) {
             return static::$valueMap[$valueParam];
         }
-
     }
 
     /**
@@ -257,14 +253,12 @@ abstract class Document extends Component {
      *
      * @return string
      */
-    function getClassNameForPropertyName($propertyName) {
-
+    public function getClassNameForPropertyName($propertyName)
+    {
         if (isset(static::$propertyMap[$propertyName])) {
             return static::$propertyMap[$propertyName];
         } else {
             return 'Sabre\\VObject\\Property\\Unknown';
         }
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/ElementList.php b/vendor/sabre/vobject/lib/ElementList.php
index 959249247..56058cbd5 100644
--- a/vendor/sabre/vobject/lib/ElementList.php
+++ b/vendor/sabre/vobject/lib/ElementList.php
@@ -15,23 +15,19 @@ use LogicException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ElementList extends ArrayIterator {
-
-
+class ElementList extends ArrayIterator
+{
     /* {{{ ArrayAccess Interface */
 
     /**
      * Sets an item through ArrayAccess.
      *
-     * @param int $offset
+     * @param int   $offset
      * @param mixed $value
-     *
-     * @return void
      */
-    function offsetSet($offset, $value) {
-
+    public function offsetSet($offset, $value)
+    {
         throw new LogicException('You can not add new objects to an ElementList');
-
     }
 
     /**
@@ -40,15 +36,11 @@ class ElementList extends ArrayIterator {
      * This method just forwards the request to the inner iterator
      *
      * @param int $offset
-     *
-     * @return void
      */
-    function offsetUnset($offset) {
-
+    public function offsetUnset($offset)
+    {
         throw new LogicException('You can not remove objects from an ElementList');
-
     }
 
     /* }}} */
-
 }
diff --git a/vendor/sabre/vobject/lib/EofException.php b/vendor/sabre/vobject/lib/EofException.php
index e9bd55878..837af7eb7 100644
--- a/vendor/sabre/vobject/lib/EofException.php
+++ b/vendor/sabre/vobject/lib/EofException.php
@@ -10,6 +10,6 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class EofException extends ParseException {
-
+class EofException extends ParseException
+{
 }
diff --git a/vendor/sabre/vobject/lib/FreeBusyData.php b/vendor/sabre/vobject/lib/FreeBusyData.php
index 0a6c72bb2..d05dfc799 100644
--- a/vendor/sabre/vobject/lib/FreeBusyData.php
+++ b/vendor/sabre/vobject/lib/FreeBusyData.php
@@ -9,17 +9,17 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class FreeBusyData {
-
+class FreeBusyData
+{
     /**
-     * Start timestamp
+     * Start timestamp.
      *
      * @var int
      */
     protected $start;
 
     /**
-     * End timestamp
+     * End timestamp.
      *
      * @var int
      */
@@ -32,35 +32,31 @@ class FreeBusyData {
      */
     protected $data;
 
-    function __construct($start, $end) {
-
+    public function __construct($start, $end)
+    {
         $this->start = $start;
         $this->end = $end;
         $this->data = [];
 
         $this->data[] = [
             'start' => $this->start,
-            'end'   => $this->end,
-            'type'  => 'FREE',
+            'end' => $this->end,
+            'type' => 'FREE',
         ];
-
     }
 
     /**
      * Adds free or busytime to the data.
      *
-     * @param int $start
-     * @param int $end
-     * @param string $type FREE, BUSY, BUSY-UNAVAILABLE or BUSY-TENTATIVE
-     * @return void
+     * @param int    $start
+     * @param int    $end
+     * @param string $type  FREE, BUSY, BUSY-UNAVAILABLE or BUSY-TENTATIVE
      */
-    function add($start, $end, $type) {
-
+    public function add($start, $end, $type)
+    {
         if ($start > $this->end || $end < $this->start) {
-
             // This new data is outside our timerange.
             return;
-
         }
 
         if ($start < $this->start) {
@@ -75,7 +71,7 @@ class FreeBusyData {
         // Finding out where we need to insert the new item.
         $currentIndex = 0;
         while ($start > $this->data[$currentIndex]['end']) {
-            $currentIndex++;
+            ++$currentIndex;
         }
 
         // The standard insertion point will be one _after_ the first
@@ -84,14 +80,14 @@ class FreeBusyData {
 
         $newItem = [
             'start' => $start,
-            'end'   => $end,
-            'type'  => $type,
+            'end' => $end,
+            'type' => $type,
         ];
 
         $preceedingItem = $this->data[$insertStartIndex - 1];
         if ($this->data[$insertStartIndex - 1]['start'] === $start) {
             // The old item starts at the exact same point as the new item.
-            $insertStartIndex--;
+            --$insertStartIndex;
         }
 
         // Now we know where to insert the item, we need to know where it
@@ -105,32 +101,32 @@ class FreeBusyData {
         }
 
         while ($end > $this->data[$currentIndex]['end']) {
-
-            $currentIndex++;
-
+            ++$currentIndex;
         }
 
         // What we are about to insert into the array
         $newItems = [
-            $newItem
+            $newItem,
         ];
 
         // This is the amount of items that are completely overwritten by the
         // new item.
         $itemsToDelete = $currentIndex - $insertStartIndex;
-        if ($this->data[$currentIndex]['end'] <= $end) $itemsToDelete++;
+        if ($this->data[$currentIndex]['end'] <= $end) {
+            ++$itemsToDelete;
+        }
 
         // If itemsToDelete was -1, it means that the newly inserted item is
         // actually sitting inside an existing one. This means we need to split
         // the item at the current position in two and insert the new item in
         // between.
-        if ($itemsToDelete === -1) {
+        if (-1 === $itemsToDelete) {
             $itemsToDelete = 0;
             if ($newItem['end'] < $preceedingItem['end']) {
                 $newItems[] = [
                     'start' => $newItem['end'] + 1,
-                    'end'   => $preceedingItem['end'],
-                    'type'  => $preceedingItem['type']
+                    'end' => $preceedingItem['end'],
+                    'type' => $preceedingItem['type'],
                 ];
             }
         }
@@ -155,8 +151,8 @@ class FreeBusyData {
             // merge them into one item.
             if ($this->data[$insertStartIndex - 1]['type'] === $this->data[$insertStartIndex]['type']) {
                 $doMerge = true;
-                $mergeOffset--;
-                $mergeDelete++;
+                --$mergeOffset;
+                ++$mergeDelete;
                 $mergeItem['start'] = $this->data[$insertStartIndex - 1]['start'];
             }
         }
@@ -168,10 +164,9 @@ class FreeBusyData {
             // merge them into one item.
             if ($this->data[$insertStartIndex + 1]['type'] === $this->data[$insertStartIndex]['type']) {
                 $doMerge = true;
-                $mergeDelete++;
+                ++$mergeDelete;
                 $mergeItem['end'] = $this->data[$insertStartIndex + 1]['end'];
             }
-
         }
         if ($doMerge) {
             array_splice(
@@ -181,13 +176,10 @@ class FreeBusyData {
                 [$mergeItem]
             );
         }
-
     }
 
-    function getData() {
-
+    public function getData()
+    {
         return $this->data;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/FreeBusyGenerator.php b/vendor/sabre/vobject/lib/FreeBusyGenerator.php
index e30b136c4..adb214c08 100644
--- a/vendor/sabre/vobject/lib/FreeBusyGenerator.php
+++ b/vendor/sabre/vobject/lib/FreeBusyGenerator.php
@@ -23,8 +23,8 @@ use Sabre\VObject\Recur\NoInstancesException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class FreeBusyGenerator {
-
+class FreeBusyGenerator
+{
     /**
      * Input objects.
      *
@@ -71,7 +71,7 @@ class FreeBusyGenerator {
     /**
      * A VAVAILABILITY document.
      *
-     * If this is set, it's information will be included when calculating
+     * If this is set, its information will be included when calculating
      * freebusy time.
      *
      * @var Document
@@ -86,11 +86,11 @@ class FreeBusyGenerator {
      *
      * @param DateTimeInterface $start
      * @param DateTimeInterface $end
-     * @param mixed $objects
-     * @param DateTimeZone $timeZone
+     * @param mixed             $objects
+     * @param DateTimeZone      $timeZone
      */
-    function __construct(DateTimeInterface $start = null, DateTimeInterface $end = null, $objects = null, DateTimeZone $timeZone = null) {
-
+    public function __construct(DateTimeInterface $start = null, DateTimeInterface $end = null, $objects = null, DateTimeZone $timeZone = null)
+    {
         $this->setTimeRange($start, $end);
 
         if ($objects) {
@@ -100,7 +100,6 @@ class FreeBusyGenerator {
             $timeZone = new DateTimeZone('UTC');
         }
         $this->setTimeZone($timeZone);
-
     }
 
     /**
@@ -112,24 +111,20 @@ class FreeBusyGenerator {
      * The VFREEBUSY object will be automatically added though.
      *
      * @param Document $vcalendar
-     * @return void
      */
-    function setBaseObject(Document $vcalendar) {
-
+    public function setBaseObject(Document $vcalendar)
+    {
         $this->baseObject = $vcalendar;
-
     }
 
     /**
      * Sets a VAVAILABILITY document.
      *
      * @param Document $vcalendar
-     * @return void
      */
-    function setVAvailability(Document $vcalendar) {
-
+    public function setVAvailability(Document $vcalendar)
+    {
         $this->vavailability = $vcalendar;
-
     }
 
     /**
@@ -140,18 +135,15 @@ class FreeBusyGenerator {
      * It's also possible to specify multiple objects as an array.
      *
      * @param mixed $objects
-     *
-     * @return void
      */
-    function setObjects($objects) {
-
+    public function setObjects($objects)
+    {
         if (!is_array($objects)) {
             $objects = [$objects];
         }
 
         $this->objects = [];
         foreach ($objects as $object) {
-
             if (is_string($object) || is_resource($object)) {
                 $this->objects[] = Reader::read($object);
             } elseif ($object instanceof Component) {
@@ -159,9 +151,7 @@ class FreeBusyGenerator {
             } else {
                 throw new \InvalidArgumentException('You can only pass strings or \\Sabre\\VObject\\Component arguments to setObjects');
             }
-
         }
-
     }
 
     /**
@@ -171,11 +161,9 @@ class FreeBusyGenerator {
      *
      * @param DateTimeInterface $start
      * @param DateTimeInterface $end
-     *
-     * @return void
      */
-    function setTimeRange(DateTimeInterface $start = null, DateTimeInterface $end = null) {
-
+    public function setTimeRange(DateTimeInterface $start = null, DateTimeInterface $end = null)
+    {
         if (!$start) {
             $start = new DateTimeImmutable(Settings::$minDate);
         }
@@ -184,20 +172,16 @@ class FreeBusyGenerator {
         }
         $this->start = $start;
         $this->end = $end;
-
     }
 
     /**
      * Sets the reference timezone for floating times.
      *
      * @param DateTimeZone $timeZone
-     *
-     * @return void
      */
-    function setTimeZone(DateTimeZone $timeZone) {
-
+    public function setTimeZone(DateTimeZone $timeZone)
+    {
         $this->timeZone = $timeZone;
-
     }
 
     /**
@@ -206,23 +190,19 @@ class FreeBusyGenerator {
      *
      * @return Component
      */
-    function getResult() {
-
+    public function getResult()
+    {
         $fbData = new FreeBusyData(
             $this->start->getTimeStamp(),
             $this->end->getTimeStamp()
         );
         if ($this->vavailability) {
-
             $this->calculateAvailability($fbData, $this->vavailability);
-
         }
 
         $this->calculateBusy($fbData, $this->objects);
 
         return $this->generateFreeBusyCalendar($fbData);
-
-
     }
 
     /**
@@ -230,29 +210,30 @@ class FreeBusyGenerator {
      * available times.
      *
      * @param FreeBusyData $fbData
-     * @param VCalendar $vavailability
-     * @return void
+     * @param VCalendar    $vavailability
      */
-    protected function calculateAvailability(FreeBusyData $fbData, VCalendar $vavailability) {
-
+    protected function calculateAvailability(FreeBusyData $fbData, VCalendar $vavailability)
+    {
         $vavailComps = iterator_to_array($vavailability->VAVAILABILITY);
         usort(
             $vavailComps,
-            function($a, $b) {
-
+            function ($a, $b) {
                 // We need to order the components by priority. Priority 1
                 // comes first, up until priority 9. Priority 0 comes after
                 // priority 9. No priority implies priority 0.
                 //
                 // Yes, I'm serious.
-                $priorityA = isset($a->PRIORITY) ? (int)$a->PRIORITY->getValue() : 0;
-                $priorityB = isset($b->PRIORITY) ? (int)$b->PRIORITY->getValue() : 0;
+                $priorityA = isset($a->PRIORITY) ? (int) $a->PRIORITY->getValue() : 0;
+                $priorityB = isset($b->PRIORITY) ? (int) $b->PRIORITY->getValue() : 0;
 
-                if ($priorityA === 0) $priorityA = 10;
-                if ($priorityB === 0) $priorityB = 10;
+                if (0 === $priorityA) {
+                    $priorityA = 10;
+                }
+                if (0 === $priorityB) {
+                    $priorityB = 10;
+                }
 
                 return $priorityA - $priorityB;
-
             }
         );
 
@@ -267,7 +248,6 @@ class FreeBusyGenerator {
         $new = [];
 
         foreach ($old as $vavail) {
-
             list($compStart, $compEnd) = $vavail->getEffectiveStartEnd();
 
             // We don't care about datetimes that are earlier or later than the
@@ -288,24 +268,19 @@ class FreeBusyGenerator {
             // Going through our existing list of components to see if there's
             // a higher priority component that already fully covers this one.
             foreach ($new as $higherVavail) {
-
                 list($higherStart, $higherEnd) = $higherVavail->getEffectiveStartEnd();
                 if (
                     (is_null($higherStart) || $higherStart < $compStart) &&
                     (is_null($higherEnd) || $higherEnd > $compEnd)
                 ) {
-
                     // Component is fully covered by a higher priority
                     // component. We can skip this component.
                     continue 2;
-
                 }
-
             }
 
             // We're keeping it!
             $new[] = $vavail;
-
         }
 
         // Lastly, we need to traverse the remaining components and fill in the
@@ -314,7 +289,6 @@ class FreeBusyGenerator {
         // We traverse the components in reverse, because we want the higher
         // priority components to override the lower ones.
         foreach (array_reverse($new) as $vavail) {
-
             $busyType = isset($vavail->BUSYTYPE) ? strtoupper($vavail->BUSYTYPE) : 'BUSY-UNAVAILABLE';
             list($vavailStart, $vavailEnd) = $vavail->getEffectiveStartEnd();
 
@@ -336,57 +310,53 @@ class FreeBusyGenerator {
             );
 
             // Looping over the AVAILABLE components.
-            if (isset($vavail->AVAILABLE)) foreach ($vavail->AVAILABLE as $available) {
-
-                list($availStart, $availEnd) = $available->getEffectiveStartEnd();
-                $fbData->add(
+            if (isset($vavail->AVAILABLE)) {
+                foreach ($vavail->AVAILABLE as $available) {
+                    list($availStart, $availEnd) = $available->getEffectiveStartEnd();
+                    $fbData->add(
                     $availStart->getTimeStamp(),
                     $availEnd->getTimeStamp(),
                     'FREE'
                 );
 
-                if ($available->RRULE) {
-                    // Our favourite thing: recurrence!!
+                    if ($available->RRULE) {
+                        // Our favourite thing: recurrence!!
 
-                    $rruleIterator = new Recur\RRuleIterator(
+                        $rruleIterator = new Recur\RRuleIterator(
                         $available->RRULE->getValue(),
                         $availStart
                     );
-                    $rruleIterator->fastForward($vavailStart);
+                        $rruleIterator->fastForward($vavailStart);
 
-                    $startEndDiff = $availStart->diff($availEnd);
+                        $startEndDiff = $availStart->diff($availEnd);
 
-                    while ($rruleIterator->valid()) {
+                        while ($rruleIterator->valid()) {
+                            $recurStart = $rruleIterator->current();
+                            $recurEnd = $recurStart->add($startEndDiff);
 
-                        $recurStart = $rruleIterator->current();
-                        $recurEnd = $recurStart->add($startEndDiff);
-
-                        if ($recurStart > $vavailEnd) {
-                            // We're beyond the legal timerange.
-                            break;
-                        }
+                            if ($recurStart > $vavailEnd) {
+                                // We're beyond the legal timerange.
+                                break;
+                            }
 
-                        if ($recurEnd > $vavailEnd) {
-                            // Truncating the end if it exceeds the
-                            // VAVAILABILITY end.
-                            $recurEnd = $vavailEnd;
-                        }
+                            if ($recurEnd > $vavailEnd) {
+                                // Truncating the end if it exceeds the
+                                // VAVAILABILITY end.
+                                $recurEnd = $vavailEnd;
+                            }
 
-                        $fbData->add(
+                            $fbData->add(
                             $recurStart->getTimeStamp(),
                             $recurEnd->getTimeStamp(),
                             'FREE'
                         );
 
-                        $rruleIterator->next();
-
+                            $rruleIterator->next();
+                        }
                     }
                 }
-
             }
-
         }
-
     }
 
     /**
@@ -394,28 +364,25 @@ class FreeBusyGenerator {
      * times on fbData.
      *
      * @param FreeBusyData $fbData
-     * @param VCalendar[] $objects
+     * @param VCalendar[]  $objects
      */
-    protected function calculateBusy(FreeBusyData $fbData, array $objects) {
-
+    protected function calculateBusy(FreeBusyData $fbData, array $objects)
+    {
         foreach ($objects as $key => $object) {
-
             foreach ($object->getBaseComponents() as $component) {
-
                 switch ($component->name) {
-
-                    case 'VEVENT' :
+                    case 'VEVENT':
 
                         $FBTYPE = 'BUSY';
-                        if (isset($component->TRANSP) && (strtoupper($component->TRANSP) === 'TRANSPARENT')) {
+                        if (isset($component->TRANSP) && ('TRANSPARENT' === strtoupper($component->TRANSP))) {
                             break;
                         }
                         if (isset($component->STATUS)) {
                             $status = strtoupper($component->STATUS);
-                            if ($status === 'CANCELLED') {
+                            if ('CANCELLED' === $status) {
                                 break;
                             }
-                            if ($status === 'TENTATIVE') {
+                            if ('TENTATIVE' === $status) {
                                 $FBTYPE = 'BUSY-TENTATIVE';
                             }
                         }
@@ -424,13 +391,13 @@ class FreeBusyGenerator {
 
                         if ($component->RRULE) {
                             try {
-                                $iterator = new EventIterator($object, (string)$component->UID, $this->timeZone);
+                                $iterator = new EventIterator($object, (string) $component->UID, $this->timeZone);
                             } catch (NoInstancesException $e) {
                                 // This event is recurring, but it doesn't have a single
                                 // instance. We are skipping this event from the output
                                 // entirely.
                                 unset($this->objects[$key]);
-                                continue;
+                                break;
                             }
 
                             if ($this->start) {
@@ -440,7 +407,6 @@ class FreeBusyGenerator {
                             $maxRecurrences = Settings::$maxRecurrences;
 
                             while ($iterator->valid() && --$maxRecurrences) {
-
                                 $startTime = $iterator->getDTStart();
                                 if ($this->end && $startTime > $this->end) {
                                     break;
@@ -451,11 +417,8 @@ class FreeBusyGenerator {
                                 ];
 
                                 $iterator->next();
-
                             }
-
                         } else {
-
                             $startTime = $component->DTSTART->getDateTime($this->timeZone);
                             if ($this->end && $startTime > $this->end) {
                                 break;
@@ -464,7 +427,7 @@ class FreeBusyGenerator {
                             if (isset($component->DTEND)) {
                                 $endTime = $component->DTEND->getDateTime($this->timeZone);
                             } elseif (isset($component->DURATION)) {
-                                $duration = DateTimeParser::parseDuration((string)$component->DURATION);
+                                $duration = DateTimeParser::parseDuration((string) $component->DURATION);
                                 $endTime = clone $startTime;
                                 $endTime = $endTime->add($duration);
                             } elseif (!$component->DTSTART->hasTime()) {
@@ -476,13 +439,15 @@ class FreeBusyGenerator {
                             }
 
                             $times[] = [$startTime, $endTime];
-
                         }
 
                         foreach ($times as $time) {
-
-                            if ($this->end && $time[0] > $this->end) break;
-                            if ($this->start && $time[1] < $this->start) break;
+                            if ($this->end && $time[0] > $this->end) {
+                                break;
+                            }
+                            if ($this->start && $time[1] < $this->start) {
+                                break;
+                            }
 
                             $fbData->add(
                                 $time[0]->getTimeStamp(),
@@ -492,21 +457,21 @@ class FreeBusyGenerator {
                         }
                         break;
 
-                    case 'VFREEBUSY' :
+                    case 'VFREEBUSY':
                         foreach ($component->FREEBUSY as $freebusy) {
-
                             $fbType = isset($freebusy['FBTYPE']) ? strtoupper($freebusy['FBTYPE']) : 'BUSY';
 
                             // Skipping intervals marked as 'free'
-                            if ($fbType === 'FREE')
+                            if ('FREE' === $fbType) {
                                 continue;
+                            }
 
                             $values = explode(',', $freebusy);
                             foreach ($values as $value) {
                                 list($startTime, $endTime) = explode('/', $value);
                                 $startTime = DateTimeParser::parseDateTime($startTime);
 
-                                if (substr($endTime, 0, 1) === 'P' || substr($endTime, 0, 2) === '-P') {
+                                if ('P' === substr($endTime, 0, 1) || '-P' === substr($endTime, 0, 2)) {
                                     $duration = DateTimeParser::parseDuration($endTime);
                                     $endTime = clone $startTime;
                                     $endTime = $endTime->add($duration);
@@ -514,27 +479,23 @@ class FreeBusyGenerator {
                                     $endTime = DateTimeParser::parseDateTime($endTime);
                                 }
 
-                                if ($this->start && $this->start > $endTime) continue;
-                                if ($this->end && $this->end < $startTime) continue;
+                                if ($this->start && $this->start > $endTime) {
+                                    continue;
+                                }
+                                if ($this->end && $this->end < $startTime) {
+                                    continue;
+                                }
                                 $fbData->add(
                                     $startTime->getTimeStamp(),
                                     $endTime->getTimeStamp(),
                                     $fbType
                                 );
-
                             }
-
-
                         }
                         break;
-
                 }
-
-
             }
-
         }
-
     }
 
     /**
@@ -543,8 +504,8 @@ class FreeBusyGenerator {
      *
      * @return VCalendar
      */
-    protected function generateFreeBusyCalendar(FreeBusyData $fbData) {
-
+    protected function generateFreeBusyCalendar(FreeBusyData $fbData)
+    {
         if ($this->baseObject) {
             $calendar = $this->baseObject;
         } else {
@@ -571,34 +532,29 @@ class FreeBusyGenerator {
         $vfreebusy->add($dtstamp);
 
         foreach ($fbData->getData() as $busyTime) {
-
             $busyType = strtoupper($busyTime['type']);
 
             // Ignoring all the FREE parts, because those are already assumed.
-            if ($busyType === 'FREE') {
+            if ('FREE' === $busyType) {
                 continue;
             }
 
-            $busyTime[0] = new \DateTimeImmutable('@' . $busyTime['start'], $tz);
-            $busyTime[1] = new \DateTimeImmutable('@' . $busyTime['end'], $tz);
+            $busyTime[0] = new \DateTimeImmutable('@'.$busyTime['start'], $tz);
+            $busyTime[1] = new \DateTimeImmutable('@'.$busyTime['end'], $tz);
 
             $prop = $calendar->createProperty(
                 'FREEBUSY',
-                $busyTime[0]->format('Ymd\\THis\\Z') . '/' . $busyTime[1]->format('Ymd\\THis\\Z')
+                $busyTime[0]->format('Ymd\\THis\\Z').'/'.$busyTime[1]->format('Ymd\\THis\\Z')
             );
 
             // Only setting FBTYPE if it's not BUSY, because BUSY is the
             // default anyway.
-            if ($busyType !== 'BUSY') {
+            if ('BUSY' !== $busyType) {
                 $prop['FBTYPE'] = $busyType;
             }
             $vfreebusy->add($prop);
-
         }
 
         return $calendar;
-
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/ITip/Broker.php b/vendor/sabre/vobject/lib/ITip/Broker.php
index b954cdc8d..b1cfee367 100644
--- a/vendor/sabre/vobject/lib/ITip/Broker.php
+++ b/vendor/sabre/vobject/lib/ITip/Broker.php
@@ -35,8 +35,8 @@ use Sabre\VObject\Recur\EventIterator;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Broker {
-
+class Broker
+{
     /**
      * This setting determines whether the rules for the SCHEDULE-AGENT
      * parameter should be followed.
@@ -104,37 +104,34 @@ class Broker {
      *
      * If the iTip message was not supported, we will always return false.
      *
-     * @param Message $itipMessage
+     * @param Message   $itipMessage
      * @param VCalendar $existingObject
      *
      * @return VCalendar|null
      */
-    function processMessage(Message $itipMessage, VCalendar $existingObject = null) {
-
+    public function processMessage(Message $itipMessage, VCalendar $existingObject = null)
+    {
         // We only support events at the moment.
-        if ($itipMessage->component !== 'VEVENT') {
+        if ('VEVENT' !== $itipMessage->component) {
             return false;
         }
 
         switch ($itipMessage->method) {
-
-            case 'REQUEST' :
+            case 'REQUEST':
                 return $this->processMessageRequest($itipMessage, $existingObject);
 
-            case 'CANCEL' :
+            case 'CANCEL':
                 return $this->processMessageCancel($itipMessage, $existingObject);
 
-            case 'REPLY' :
+            case 'REPLY':
                 return $this->processMessageReply($itipMessage, $existingObject);
 
-            default :
+            default:
                 // Unsupported iTip message
                 return;
-
         }
 
         return $existingObject;
-
     }
 
     /**
@@ -161,13 +158,13 @@ class Broker {
      * organizer gets the 'declined' message.
      *
      * @param VCalendar|string $calendar
-     * @param string|array $userHref
+     * @param string|array     $userHref
      * @param VCalendar|string $oldCalendar
      *
      * @return array
      */
-    function parseEvent($calendar = null, $userHref, $oldCalendar = null) {
-
+    public function parseEvent($calendar = null, $userHref, $oldCalendar = null)
+    {
         if ($oldCalendar) {
             if (is_string($oldCalendar)) {
                 $oldCalendar = Reader::read($oldCalendar);
@@ -180,16 +177,15 @@ class Broker {
             $oldEventInfo = $this->parseEventInfo($oldCalendar);
         } else {
             $oldEventInfo = [
-                'organizer'             => null,
+                'organizer' => null,
                 'significantChangeHash' => '',
-                'attendees'             => [],
+                'attendees' => [],
             ];
         }
 
-        $userHref = (array)$userHref;
+        $userHref = (array) $userHref;
 
         if (!is_null($calendar)) {
-
             if (is_string($calendar)) {
                 $calendar = Reader::read($calendar);
             }
@@ -217,7 +213,6 @@ class Broker {
                 $eventInfo['organizer'] = $oldEventInfo['organizer'];
                 $eventInfo['organizerName'] = $oldEventInfo['organizerName'];
             }
-
         } else {
             // The calendar object got deleted, we need to process this as a
             // cancellation / decline.
@@ -233,19 +228,17 @@ class Broker {
                 $eventInfo['attendees'] = [];
                 // Increasing the sequence, but only if the organizer deleted
                 // the event.
-                $eventInfo['sequence']++;
+                ++$eventInfo['sequence'];
             } else {
                 // This is an attendee deleting the event.
                 foreach ($eventInfo['attendees'] as $key => $attendee) {
                     if (in_array($attendee['href'], $userHref)) {
-                        $eventInfo['attendees'][$key]['instances'] = ['master' =>
-                            ['id' => 'master', 'partstat' => 'DECLINED']
+                        $eventInfo['attendees'][$key]['instances'] = ['master' => ['id' => 'master', 'partstat' => 'DECLINED'],
                         ];
                     }
                 }
             }
             $baseCalendar = $oldCalendar;
-
         }
 
         if (in_array($eventInfo['organizer'], $userHref)) {
@@ -260,8 +253,8 @@ class Broker {
                 }
             }
         }
-        return [];
 
+        return [];
     }
 
     /**
@@ -271,13 +264,13 @@ class Broker {
      * invite, or an update to an existing one.
      *
      *
-     * @param Message $itipMessage
+     * @param Message   $itipMessage
      * @param VCalendar $existingObject
      *
      * @return VCalendar|null
      */
-    protected function processMessageRequest(Message $itipMessage, VCalendar $existingObject = null) {
-
+    protected function processMessageRequest(Message $itipMessage, VCalendar $existingObject = null)
+    {
         if (!$existingObject) {
             // This is a new invite, and we're just going to copy over
             // all the components from the invite.
@@ -296,8 +289,8 @@ class Broker {
                 $existingObject->add(clone $component);
             }
         }
-        return $existingObject;
 
+        return $existingObject;
     }
 
     /**
@@ -307,13 +300,13 @@ class Broker {
      * attendee got removed from an event, or an event got cancelled
      * altogether.
      *
-     * @param Message $itipMessage
+     * @param Message   $itipMessage
      * @param VCalendar $existingObject
      *
      * @return VCalendar|null
      */
-    protected function processMessageCancel(Message $itipMessage, VCalendar $existingObject = null) {
-
+    protected function processMessageCancel(Message $itipMessage, VCalendar $existingObject = null)
+    {
         if (!$existingObject) {
             // The event didn't exist in the first place, so we're just
             // ignoring this message.
@@ -323,8 +316,8 @@ class Broker {
                 $vevent->SEQUENCE = $itipMessage->sequence;
             }
         }
-        return $existingObject;
 
+        return $existingObject;
     }
 
     /**
@@ -333,13 +326,13 @@ class Broker {
      * The message is a reply. This is for example an attendee telling
      * an organizer he accepted the invite, or declined it.
      *
-     * @param Message $itipMessage
+     * @param Message   $itipMessage
      * @param VCalendar $existingObject
      *
      * @return VCalendar|null
      */
-    protected function processMessageReply(Message $itipMessage, VCalendar $existingObject = null) {
-
+    protected function processMessageReply(Message $itipMessage, VCalendar $existingObject = null)
+    {
         // A reply can only be processed based on an existing object.
         // If the object is not available, the reply is ignored.
         if (!$existingObject) {
@@ -364,7 +357,7 @@ class Broker {
         $masterObject = null;
         foreach ($existingObject->VEVENT as $vevent) {
             $recurId = isset($vevent->{'RECURRENCE-ID'}) ? $vevent->{'RECURRENCE-ID'}->getValue() : 'master';
-            if ($recurId === 'master') {
+            if ('master' === $recurId) {
                 $masterObject = $vevent;
             }
             if (isset($instances[$recurId])) {
@@ -386,9 +379,11 @@ class Broker {
                     // Adding a new attendee. The iTip documentation calls this
                     // a party crasher.
                     $attendee = $vevent->add('ATTENDEE', $itipMessage->sender, [
-                        'PARTSTAT' => $instances[$recurId]
+                        'PARTSTAT' => $instances[$recurId],
                     ]);
-                    if ($itipMessage->senderName) $attendee['CN'] = $itipMessage->senderName;
+                    if ($itipMessage->senderName) {
+                        $attendee['CN'] = $itipMessage->senderName;
+                    }
                 }
                 unset($instances[$recurId]);
             }
@@ -401,24 +396,23 @@ class Broker {
         // If we got replies to instances that did not exist in the
         // original list, it means that new exceptions must be created.
         foreach ($instances as $recurId => $partstat) {
-
             $recurrenceIterator = new EventIterator($existingObject, $itipMessage->uid);
             $found = false;
             $iterations = 1000;
             do {
-
                 $newObject = $recurrenceIterator->getEventObject();
                 $recurrenceIterator->next();
 
                 if (isset($newObject->{'RECURRENCE-ID'}) && $newObject->{'RECURRENCE-ID'}->getValue() === $recurId) {
                     $found = true;
                 }
-                $iterations--;
-
+                --$iterations;
             } while ($recurrenceIterator->valid() && !$found && $iterations);
 
             // Invalid recurrence id. Skipping this object.
-            if (!$found) continue;
+            if (!$found) {
+                continue;
+            }
 
             unset(
                 $newObject->RRULE,
@@ -438,17 +432,16 @@ class Broker {
             if (!$attendeeFound) {
                 // Adding a new attendee
                 $attendee = $newObject->add('ATTENDEE', $itipMessage->sender, [
-                    'PARTSTAT' => $partstat
+                    'PARTSTAT' => $partstat,
                 ]);
                 if ($itipMessage->senderName) {
                     $attendee['CN'] = $itipMessage->senderName;
                 }
             }
             $existingObject->add($newObject);
-
         }
-        return $existingObject;
 
+        return $existingObject;
     }
 
     /**
@@ -460,22 +453,22 @@ class Broker {
      * specific messages for these situations.
      *
      * @param VCalendar $calendar
-     * @param array $eventInfo
-     * @param array $oldEventInfo
+     * @param array     $eventInfo
+     * @param array     $oldEventInfo
      *
      * @return array
      */
-    protected function parseEventForOrganizer(VCalendar $calendar, array $eventInfo, array $oldEventInfo) {
-
+    protected function parseEventForOrganizer(VCalendar $calendar, array $eventInfo, array $oldEventInfo)
+    {
         // Merging attendee lists.
         $attendees = [];
         foreach ($oldEventInfo['attendees'] as $attendee) {
             $attendees[$attendee['href']] = [
-                'href'         => $attendee['href'],
+                'href' => $attendee['href'],
                 'oldInstances' => $attendee['instances'],
                 'newInstances' => [],
-                'name'         => $attendee['name'],
-                'forceSend'    => null,
+                'name' => $attendee['name'],
+                'forceSend' => null,
             ];
         }
         foreach ($eventInfo['attendees'] as $attendee) {
@@ -485,11 +478,11 @@ class Broker {
                 $attendees[$attendee['href']]['forceSend'] = $attendee['forceSend'];
             } else {
                 $attendees[$attendee['href']] = [
-                    'href'         => $attendee['href'],
+                    'href' => $attendee['href'],
                     'oldInstances' => [],
                     'newInstances' => $attendee['instances'],
-                    'name'         => $attendee['name'],
-                    'forceSend'    => $attendee['forceSend'],
+                    'name' => $attendee['name'],
+                    'forceSend' => $attendee['forceSend'],
                 ];
             }
         }
@@ -497,7 +490,6 @@ class Broker {
         $messages = [];
 
         foreach ($attendees as $attendee) {
-
             // An organizer can also be an attendee. We should not generate any
             // messages for those.
             if ($attendee['href'] === $eventInfo['organizer']) {
@@ -514,7 +506,6 @@ class Broker {
             $message->recipientName = $attendee['name'];
 
             if (!$attendee['newInstances']) {
-
                 // If there are no instances the attendee is a part of, it
                 // means the attendee was removed and we need to send him a
                 // CANCEL.
@@ -523,8 +514,13 @@ class Broker {
                 // Creating the new iCalendar body.
                 $icalMsg = new VCalendar();
                 $icalMsg->METHOD = $message->method;
+
+                foreach ($calendar->select('VTIMEZONE') as $timezone) {
+                    $icalMsg->add(clone $timezone);
+                }
+
                 $event = $icalMsg->add('VEVENT', [
-                    'UID'      => $message->uid,
+                    'UID' => $message->uid,
                     'SEQUENCE' => $message->sequence,
                 ]);
                 if (isset($calendar->VEVENT->SUMMARY)) {
@@ -537,14 +533,14 @@ class Broker {
                     $event->add(clone $calendar->VEVENT->DURATION);
                 }
                 $org = $event->add('ORGANIZER', $eventInfo['organizer']);
-                if ($eventInfo['organizerName']) $org['CN'] = $eventInfo['organizerName'];
+                if ($eventInfo['organizerName']) {
+                    $org['CN'] = $eventInfo['organizerName'];
+                }
                 $event->add('ATTENDEE', $attendee['href'], [
                     'CN' => $attendee['name'],
                 ]);
                 $message->significantChange = true;
-
             } else {
-
                 // The attendee gets the updated event body
                 $message->method = 'REQUEST';
 
@@ -565,15 +561,13 @@ class Broker {
                 // difference in instances that the attendee is invited to.
 
                 $message->significantChange =
-                    $attendee['forceSend'] === 'REQUEST' ||
+                    'REQUEST' === $attendee['forceSend'] ||
                     array_keys($attendee['oldInstances']) != array_keys($attendee['newInstances']) ||
                     $oldEventInfo['significantChangeHash'] !== $eventInfo['significantChangeHash'];
 
                 foreach ($attendee['newInstances'] as $instanceId => $instanceInfo) {
-
                     $currentEvent = clone $eventInfo['instances'][$instanceId];
-                    if ($instanceId === 'master') {
-
+                    if ('master' === $instanceId) {
                         // We need to find a list of events that the attendee
                         // is not a part of to add to the list of exceptions.
                         $exceptions = [];
@@ -610,24 +604,18 @@ class Broker {
                             if (!isset($attendee['PARTSTAT'])) {
                                 $attendee['PARTSTAT'] = 'NEEDS-ACTION';
                             }
-
                         }
-
                     }
 
                     $icalMsg->add($currentEvent);
-
                 }
-
             }
 
             $message->message = $icalMsg;
             $messages[] = $message;
-
         }
 
         return $messages;
-
     }
 
     /**
@@ -636,21 +624,21 @@ class Broker {
      * This function figures out if we need to send a reply to an organizer.
      *
      * @param VCalendar $calendar
-     * @param array $eventInfo
-     * @param array $oldEventInfo
-     * @param string $attendee
+     * @param array     $eventInfo
+     * @param array     $oldEventInfo
+     * @param string    $attendee
      *
      * @return Message[]
      */
-    protected function parseEventForAttendee(VCalendar $calendar, array $eventInfo, array $oldEventInfo, $attendee) {
-
-        if ($this->scheduleAgentServerRules && $eventInfo['organizerScheduleAgent'] === 'CLIENT') {
+    protected function parseEventForAttendee(VCalendar $calendar, array $eventInfo, array $oldEventInfo, $attendee)
+    {
+        if ($this->scheduleAgentServerRules && 'CLIENT' === $eventInfo['organizerScheduleAgent']) {
             return [];
         }
 
         // Don't bother generating messages for events that have already been
         // cancelled.
-        if ($eventInfo['status'] === 'CANCELLED') {
+        if ('CANCELLED' === $eventInfo['status']) {
             return [];
         }
 
@@ -660,26 +648,22 @@ class Broker {
 
         $instances = [];
         foreach ($oldInstances as $instance) {
-
             $instances[$instance['id']] = [
-                'id'        => $instance['id'],
+                'id' => $instance['id'],
                 'oldstatus' => $instance['partstat'],
                 'newstatus' => null,
             ];
-
         }
         foreach ($eventInfo['attendees'][$attendee]['instances'] as $instance) {
-
             if (isset($instances[$instance['id']])) {
                 $instances[$instance['id']]['newstatus'] = $instance['partstat'];
             } else {
                 $instances[$instance['id']] = [
-                    'id'        => $instance['id'],
+                    'id' => $instance['id'],
                     'oldstatus' => null,
                     'newstatus' => $instance['partstat'],
                 ];
             }
-
         }
 
         // We need to also look for differences in EXDATE. If there are new
@@ -687,33 +671,29 @@ class Broker {
         // event, which means we need to send DECLINED specifically for those
         // instances.
         // We only need to do that though, if the master event is not declined.
-        if (isset($instances['master']) && $instances['master']['newstatus'] !== 'DECLINED') {
+        if (isset($instances['master']) && 'DECLINED' !== $instances['master']['newstatus']) {
             foreach ($eventInfo['exdate'] as $exDate) {
-
                 if (!in_array($exDate, $oldEventInfo['exdate'])) {
                     if (isset($instances[$exDate])) {
                         $instances[$exDate]['newstatus'] = 'DECLINED';
                     } else {
                         $instances[$exDate] = [
-                            'id'        => $exDate,
+                            'id' => $exDate,
                             'oldstatus' => null,
                             'newstatus' => 'DECLINED',
                         ];
                     }
                 }
-
             }
         }
 
         // Gathering a few extra properties for each instance.
         foreach ($instances as $recurId => $instanceInfo) {
-
             if (isset($eventInfo['instances'][$recurId])) {
                 $instances[$recurId]['dtstart'] = clone $eventInfo['instances'][$recurId]->DTSTART;
             } else {
                 $instances[$recurId]['dtstart'] = $recurId;
             }
-
         }
 
         $message = new Message();
@@ -732,14 +712,13 @@ class Broker {
         $hasReply = false;
 
         foreach ($instances as $instance) {
-
-            if ($instance['oldstatus'] == $instance['newstatus'] && $eventInfo['organizerForceSend'] !== 'REPLY') {
+            if ($instance['oldstatus'] == $instance['newstatus'] && 'REPLY' !== $eventInfo['organizerForceSend']) {
                 // Skip
                 continue;
             }
 
             $event = $icalMsg->add('VEVENT', [
-                'UID'      => $message->uid,
+                'UID' => $message->uid,
                 'SEQUENCE' => $message->sequence,
             ]);
             $summary = isset($calendar->VEVENT->SUMMARY) ? $calendar->VEVENT->SUMMARY->getValue() : '';
@@ -773,7 +752,7 @@ class Broker {
                     $event->add('SUMMARY', $summary);
                 }
             }
-            if ($instance['id'] !== 'master') {
+            if ('master' !== $instance['id']) {
                 $dt = DateTimeParser::parse($instance['id'], $eventInfo['timezone']);
                 // Treat is as a DATE field
                 if (strlen($instance['id']) <= 8) {
@@ -787,22 +766,21 @@ class Broker {
                 $organizer['CN'] = $message->recipientName;
             }
             $attendee = $event->add('ATTENDEE', $message->sender, [
-                'PARTSTAT' => $instance['newstatus']
+                'PARTSTAT' => $instance['newstatus'],
             ]);
             if ($message->senderName) {
                 $attendee['CN'] = $message->senderName;
             }
             $hasReply = true;
-
         }
 
         if ($hasReply) {
             $message->message = $icalMsg;
+
             return [$message];
         } else {
             return [];
         }
-
     }
 
     /**
@@ -824,12 +802,13 @@ class Broker {
      *                based on.
      * 11. significantChangeHash
      * 12. status
+     *
      * @param VCalendar $calendar
      *
      * @return array
      */
-    protected function parseEventInfo(VCalendar $calendar = null) {
-
+    protected function parseEventInfo(VCalendar $calendar = null)
+    {
         $uid = null;
         $organizer = null;
         $organizerName = null;
@@ -868,7 +847,7 @@ class Broker {
                     $organizer = $vevent->ORGANIZER->getNormalizedValue();
                     $organizerName = isset($vevent->ORGANIZER['CN']) ? $vevent->ORGANIZER['CN'] : null;
                 } else {
-                    if ($organizer !== $vevent->ORGANIZER->getNormalizedValue()) {
+                    if (strtoupper($organizer) !== strtoupper($vevent->ORGANIZER->getNormalizedValue())) {
                         throw new SameOrganizerForAllComponentsException('Every instance of the event must have the same organizer.');
                     }
                 }
@@ -878,7 +857,7 @@ class Broker {
                     null;
                 $organizerScheduleAgent =
                     isset($vevent->ORGANIZER['SCHEDULE-AGENT']) ?
-                    strtoupper((string)$vevent->ORGANIZER['SCHEDULE-AGENT']) :
+                    strtoupper((string) $vevent->ORGANIZER['SCHEDULE-AGENT']) :
                     'SERVER';
             }
             if (is_null($sequence) && isset($vevent->SEQUENCE)) {
@@ -894,7 +873,7 @@ class Broker {
                 foreach ($vevent->select('RRULE') as $rr) {
                     foreach ($rr->getParts() as $key => $val) {
                         // ignore default values (https://github.com/sabre-io/vobject/issues/126)
-                        if ($key === 'INTERVAL' && $val == 1) {
+                        if ('INTERVAL' === $key && 1 == $val) {
                             continue;
                         }
                         if (is_array($val)) {
@@ -911,7 +890,7 @@ class Broker {
 
             $recurId = isset($vevent->{'RECURRENCE-ID'}) ? $vevent->{'RECURRENCE-ID'}->getValue() : 'master';
             if (is_null($timezone)) {
-                if ($recurId === 'master') {
+                if ('master' === $recurId) {
                     $timezone = $vevent->DTSTART->getDateTime()->getTimeZone();
                 } else {
                     $timezone = $vevent->{'RECURRENCE-ID'}->getDateTime()->getTimeZone();
@@ -919,10 +898,9 @@ class Broker {
             }
             if (isset($vevent->ATTENDEE)) {
                 foreach ($vevent->ATTENDEE as $attendee) {
-
                     if ($this->scheduleAgentServerRules &&
                         isset($attendee['SCHEDULE-AGENT']) &&
-                        strtoupper($attendee['SCHEDULE-AGENT']->getValue()) === 'CLIENT'
+                        'CLIENT' === strtoupper($attendee['SCHEDULE-AGENT']->getValue())
                     ) {
                         continue;
                     }
@@ -936,45 +914,42 @@ class Broker {
                         strtoupper($attendee['SCHEDULE-FORCE-SEND']) :
                         null;
 
-
                     if (isset($attendees[$attendee->getNormalizedValue()])) {
                         $attendees[$attendee->getNormalizedValue()]['instances'][$recurId] = [
-                            'id'        => $recurId,
-                            'partstat'  => $partStat,
+                            'id' => $recurId,
+                            'partstat' => $partStat,
                             'forceSend' => $forceSend,
                         ];
                     } else {
                         $attendees[$attendee->getNormalizedValue()] = [
-                            'href'      => $attendee->getNormalizedValue(),
+                            'href' => $attendee->getNormalizedValue(),
                             'instances' => [
                                 $recurId => [
-                                    'id'       => $recurId,
+                                    'id' => $recurId,
                                     'partstat' => $partStat,
                                 ],
                             ],
-                            'name'      => isset($attendee['CN']) ? (string)$attendee['CN'] : null,
+                            'name' => isset($attendee['CN']) ? (string) $attendee['CN'] : null,
                             'forceSend' => $forceSend,
                         ];
                     }
-
                 }
                 $instances[$recurId] = $vevent;
-
             }
 
             foreach ($this->significantChangeProperties as $prop) {
                 if (isset($vevent->$prop)) {
                     $propertyValues = $vevent->select($prop);
 
-                    $significantChangeHash .= $prop . ':';
+                    $significantChangeHash .= $prop.':';
 
-                    if ($prop === 'EXDATE') {
-                        $significantChangeHash .= implode(',', $exdate) . ';';
-                    } elseif ($prop === 'RRULE') {
-                        $significantChangeHash .= implode(',', $rrule) . ';';
+                    if ('EXDATE' === $prop) {
+                        $significantChangeHash .= implode(',', $exdate).';';
+                    } elseif ('RRULE' === $prop) {
+                        $significantChangeHash .= implode(',', $rrule).';';
                     } else {
                         foreach ($propertyValues as $val) {
-                            $significantChangeHash .= $val->getValue() . ';';
+                            $significantChangeHash .= $val->getValue().';';
                         }
                     }
                 }
@@ -996,7 +971,5 @@ class Broker {
             'significantChangeHash',
             'status'
         );
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/ITip/ITipException.php b/vendor/sabre/vobject/lib/ITip/ITipException.php
index ad5e53ab4..949563614 100644
--- a/vendor/sabre/vobject/lib/ITip/ITipException.php
+++ b/vendor/sabre/vobject/lib/ITip/ITipException.php
@@ -11,5 +11,6 @@ use Exception;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ITipException extends Exception {
+class ITipException extends Exception
+{
 }
diff --git a/vendor/sabre/vobject/lib/ITip/Message.php b/vendor/sabre/vobject/lib/ITip/Message.php
index bebe2e4fc..43536f172 100644
--- a/vendor/sabre/vobject/lib/ITip/Message.php
+++ b/vendor/sabre/vobject/lib/ITip/Message.php
@@ -14,8 +14,8 @@ namespace Sabre\VObject\ITip;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Message {
-
+class Message
+{
     /**
      * The object's UID.
      *
@@ -123,19 +123,14 @@ class Message {
      *
      * @return mixed bool|string
      */
-    function getScheduleStatus() {
-
+    public function getScheduleStatus()
+    {
         if (!$this->scheduleStatus) {
-
             return false;
-
         } else {
-
             list($scheduleStatus) = explode(';', $this->scheduleStatus);
-            return $scheduleStatus;
 
+            return $scheduleStatus;
         }
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/ITip/SameOrganizerForAllComponentsException.php b/vendor/sabre/vobject/lib/ITip/SameOrganizerForAllComponentsException.php
index 423b39831..4c48625be 100644
--- a/vendor/sabre/vobject/lib/ITip/SameOrganizerForAllComponentsException.php
+++ b/vendor/sabre/vobject/lib/ITip/SameOrganizerForAllComponentsException.php
@@ -13,6 +13,6 @@ namespace Sabre\VObject\ITip;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SameOrganizerForAllComponentsException extends ITipException {
-
+class SameOrganizerForAllComponentsException extends ITipException
+{
 }
diff --git a/vendor/sabre/vobject/lib/InvalidDataException.php b/vendor/sabre/vobject/lib/InvalidDataException.php
index 50ebc0f49..1d8b67583 100644
--- a/vendor/sabre/vobject/lib/InvalidDataException.php
+++ b/vendor/sabre/vobject/lib/InvalidDataException.php
@@ -10,5 +10,6 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InvalidDataException extends \Exception {
+class InvalidDataException extends \Exception
+{
 }
diff --git a/vendor/sabre/vobject/lib/Node.php b/vendor/sabre/vobject/lib/Node.php
index e2845da75..154a7fac5 100644
--- a/vendor/sabre/vobject/lib/Node.php
+++ b/vendor/sabre/vobject/lib/Node.php
@@ -11,13 +11,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Node
-    implements \IteratorAggregate,
-               \ArrayAccess,
-               \Countable,
-               \JsonSerializable,
-               Xml\XmlSerializable {
-
+abstract class Node implements \IteratorAggregate, \ArrayAccess, \Countable, \JsonSerializable, Xml\XmlSerializable
+{
     /**
      * The following constants are used by the validate() method.
      *
@@ -70,7 +65,7 @@ abstract class Node
      *
      * @return string
      */
-    abstract function serialize();
+    abstract public function serialize();
 
     /**
      * This method returns an array, with the representation as it should be
@@ -78,31 +73,26 @@ abstract class Node
      *
      * @return array
      */
-    abstract function jsonSerialize();
+    abstract public function jsonSerialize();
 
     /**
      * This method serializes the data into XML. This is used to create xCard or
      * xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    abstract function xmlSerialize(Xml\Writer $writer);
+    abstract public function xmlSerialize(Xml\Writer $writer);
 
     /**
      * Call this method on a document if you're done using it.
      *
      * It's intended to remove all circular references, so PHP can easily clean
      * it up.
-     *
-     * @return void
      */
-    function destroy() {
-
+    public function destroy()
+    {
         $this->parent = null;
         $this->root = null;
-
     }
 
     /* {{{ IteratorAggregator interface */
@@ -112,14 +102,13 @@ abstract class Node
      *
      * @return ElementList
      */
-    function getIterator() {
-
+    public function getIterator()
+    {
         if (!is_null($this->iterator)) {
             return $this->iterator;
         }
 
         return new ElementList([$this]);
-
     }
 
     /**
@@ -128,13 +117,10 @@ abstract class Node
      * Note that this is not actually part of the iterator interface
      *
      * @param ElementList $iterator
-     *
-     * @return void
      */
-    function setIterator(ElementList $iterator) {
-
+    public function setIterator(ElementList $iterator)
+    {
         $this->iterator = $iterator;
-
     }
 
     /**
@@ -159,10 +145,9 @@ abstract class Node
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         return [];
-
     }
 
     /* }}} */
@@ -174,18 +159,17 @@ abstract class Node
      *
      * @return int
      */
-    function count() {
-
+    public function count()
+    {
         $it = $this->getIterator();
-        return $it->count();
 
+        return $it->count();
     }
 
     /* }}} */
 
     /* {{{ ArrayAccess Interface */
 
-
     /**
      * Checks if an item exists through ArrayAccess.
      *
@@ -195,11 +179,11 @@ abstract class Node
      *
      * @return bool
      */
-    function offsetExists($offset) {
-
+    public function offsetExists($offset)
+    {
         $iterator = $this->getIterator();
-        return $iterator->offsetExists($offset);
 
+        return $iterator->offsetExists($offset);
     }
 
     /**
@@ -211,11 +195,11 @@ abstract class Node
      *
      * @return mixed
      */
-    function offsetGet($offset) {
-
+    public function offsetGet($offset)
+    {
         $iterator = $this->getIterator();
-        return $iterator->offsetGet($offset);
 
+        return $iterator->offsetGet($offset);
     }
 
     /**
@@ -223,21 +207,20 @@ abstract class Node
      *
      * This method just forwards the request to the inner iterator
      *
-     * @param int $offset
+     * @param int   $offset
      * @param mixed $value
-     *
-     * @return void
      */
-    function offsetSet($offset, $value) {
-
+    public function offsetSet($offset, $value)
+    {
         $iterator = $this->getIterator();
         $iterator->offsetSet($offset, $value);
 
-    // @codeCoverageIgnoreStart
+        // @codeCoverageIgnoreStart
     //
     // This method always throws an exception, so we ignore the closing
     // brace
     }
+
     // @codeCoverageIgnoreEnd
 
     /**
@@ -246,19 +229,18 @@ abstract class Node
      * This method just forwards the request to the inner iterator
      *
      * @param int $offset
-     *
-     * @return void
      */
-    function offsetUnset($offset) {
-
+    public function offsetUnset($offset)
+    {
         $iterator = $this->getIterator();
         $iterator->offsetUnset($offset);
 
-    // @codeCoverageIgnoreStart
+        // @codeCoverageIgnoreStart
     //
     // This method always throws an exception, so we ignore the closing
     // brace
     }
+
     // @codeCoverageIgnoreEnd
 
     /* }}} */
diff --git a/vendor/sabre/vobject/lib/PHPUnitAssertions.php b/vendor/sabre/vobject/lib/PHPUnitAssertions.php
index 87ec75e8f..d77e4b1ed 100644
--- a/vendor/sabre/vobject/lib/PHPUnitAssertions.php
+++ b/vendor/sabre/vobject/lib/PHPUnitAssertions.php
@@ -3,7 +3,7 @@
 namespace Sabre\VObject;
 
 /**
- * PHPUnit Assertions
+ * PHPUnit Assertions.
  *
  * This trait can be added to your unittest to make it easier to test iCalendar
  * and/or vCards.
@@ -12,8 +12,8 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-trait PHPUnitAssertions {
-
+trait PHPUnitAssertions
+{
     /**
      * This method tests wether two vcards or icalendar objects are
      * semantically identical.
@@ -30,13 +30,12 @@ trait PHPUnitAssertions {
      *
      * @param resource|string|Component $expected
      * @param resource|string|Component $actual
-     * @param string $message
+     * @param string                    $message
      */
-    function assertVObjectEqualsVObject($expected, $actual, $message = '') {
-
+    public function assertVObjectEqualsVObject($expected, $actual, $message = '')
+    {
         $self = $this;
-        $getObj = function($input) use ($self) {
-
+        $getObj = function ($input) use ($self) {
             if (is_resource($input)) {
                 $input = stream_get_contents($input);
             }
@@ -47,11 +46,11 @@ trait PHPUnitAssertions {
                 $this->fail('Input must be a string, stream or VObject component');
             }
             unset($input->PRODID);
-            if ($input instanceof Component\VCalendar && (string)$input->CALSCALE === 'GREGORIAN') {
+            if ($input instanceof Component\VCalendar && 'GREGORIAN' === (string) $input->CALSCALE) {
                 unset($input->CALSCALE);
             }
-            return $input;
 
+            return $input;
         };
 
         $expected = $getObj($expected)->serialize();
@@ -61,13 +60,11 @@ trait PHPUnitAssertions {
         preg_match_all('|^([A-Z]+):\\*\\*ANY\\*\\*\r$|m', $expected, $matches, PREG_SET_ORDER);
 
         foreach ($matches as $match) {
-
             $actual = preg_replace(
-                '|^' . preg_quote($match[1], '|') . ':(.*)\r$|m',
-                $match[1] . ':**ANY**' . "\r",
+                '|^'.preg_quote($match[1], '|').':(.*)\r$|m',
+                $match[1].':**ANY**'."\r",
                 $actual
             );
-
         }
 
         $this->assertEquals(
@@ -75,8 +72,5 @@ trait PHPUnitAssertions {
             $actual,
             $message
         );
-
     }
-
-
 }
diff --git a/vendor/sabre/vobject/lib/Parameter.php b/vendor/sabre/vobject/lib/Parameter.php
index a99a33eec..2c9a8e7fd 100644
--- a/vendor/sabre/vobject/lib/Parameter.php
+++ b/vendor/sabre/vobject/lib/Parameter.php
@@ -17,8 +17,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Parameter extends Node {
-
+class Parameter extends Node
+{
     /**
      * Parameter name.
      *
@@ -29,7 +29,7 @@ class Parameter extends Node {
     /**
      * vCard 2.1 allows parameters to be encoded without a name.
      *
-     * We can deduce the parameter name based on it's value.
+     * We can deduce the parameter name based on its value.
      *
      * @var bool
      */
@@ -50,8 +50,8 @@ class Parameter extends Node {
      * @param string $name
      * @param string $value
      */
-    function __construct(Document $root, $name, $value = null) {
-
+    public function __construct(Document $root, $name, $value = null)
+    {
         $this->name = strtoupper($name);
         $this->root = $root;
         if (is_null($name)) {
@@ -62,13 +62,12 @@ class Parameter extends Node {
         // If guessParameterNameByValue() returns an empty string
         // above, we're actually dealing with a parameter that has no value.
         // In that case we have to move the value to the name.
-        if ($this->name === '') {
+        if ('' === $this->name) {
             $this->noName = false;
             $this->name = strtoupper($value);
         } else {
             $this->setValue($value);
         }
-
     }
 
     /**
@@ -82,85 +81,85 @@ class Parameter extends Node {
      *
      * @return string
      */
-    static function guessParameterNameByValue($value) {
+    public static function guessParameterNameByValue($value)
+    {
         switch (strtoupper($value)) {
-
             // Encodings
-            case '7-BIT' :
-            case 'QUOTED-PRINTABLE' :
-            case 'BASE64' :
+            case '7-BIT':
+            case 'QUOTED-PRINTABLE':
+            case 'BASE64':
                 $name = 'ENCODING';
                 break;
 
             // Common types
-            case 'WORK' :
-            case 'HOME' :
-            case 'PREF' :
+            case 'WORK':
+            case 'HOME':
+            case 'PREF':
 
             // Delivery Label Type
-            case 'DOM' :
-            case 'INTL' :
-            case 'POSTAL' :
-            case 'PARCEL' :
+            case 'DOM':
+            case 'INTL':
+            case 'POSTAL':
+            case 'PARCEL':
 
             // Telephone types
-            case 'VOICE' :
-            case 'FAX' :
-            case 'MSG' :
-            case 'CELL' :
-            case 'PAGER' :
-            case 'BBS' :
-            case 'MODEM' :
-            case 'CAR' :
-            case 'ISDN' :
-            case 'VIDEO' :
+            case 'VOICE':
+            case 'FAX':
+            case 'MSG':
+            case 'CELL':
+            case 'PAGER':
+            case 'BBS':
+            case 'MODEM':
+            case 'CAR':
+            case 'ISDN':
+            case 'VIDEO':
 
             // EMAIL types (lol)
-            case 'AOL' :
-            case 'APPLELINK' :
-            case 'ATTMAIL' :
-            case 'CIS' :
-            case 'EWORLD' :
-            case 'INTERNET' :
-            case 'IBMMAIL' :
-            case 'MCIMAIL' :
-            case 'POWERSHARE' :
-            case 'PRODIGY' :
-            case 'TLX' :
-            case 'X400' :
+            case 'AOL':
+            case 'APPLELINK':
+            case 'ATTMAIL':
+            case 'CIS':
+            case 'EWORLD':
+            case 'INTERNET':
+            case 'IBMMAIL':
+            case 'MCIMAIL':
+            case 'POWERSHARE':
+            case 'PRODIGY':
+            case 'TLX':
+            case 'X400':
 
             // Photo / Logo format types
-            case 'GIF' :
-            case 'CGM' :
-            case 'WMF' :
-            case 'BMP' :
-            case 'DIB' :
-            case 'PICT' :
-            case 'TIFF' :
-            case 'PDF' :
-            case 'PS' :
-            case 'JPEG' :
-            case 'MPEG' :
-            case 'MPEG2' :
-            case 'AVI' :
-            case 'QTIME' :
+            case 'GIF':
+            case 'CGM':
+            case 'WMF':
+            case 'BMP':
+            case 'DIB':
+            case 'PICT':
+            case 'TIFF':
+            case 'PDF':
+            case 'PS':
+            case 'JPEG':
+            case 'MPEG':
+            case 'MPEG2':
+            case 'AVI':
+            case 'QTIME':
 
             // Sound Digital Audio Type
-            case 'WAVE' :
-            case 'PCM' :
-            case 'AIFF' :
+            case 'WAVE':
+            case 'PCM':
+            case 'AIFF':
 
             // Key types
-            case 'X509' :
-            case 'PGP' :
+            case 'X509':
+            case 'PGP':
                 $name = 'TYPE';
                 break;
 
             // Value types
-            case 'INLINE' :
-            case 'URL' :
-            case 'CONTENT-ID' :
-            case 'CID' :
+            case 'INLINE':
+            case 'URL':
+            case 'CONTENT-ID':
+            case 'CID':
                 $name = 'VALUE';
                 break;
 
@@ -177,13 +176,10 @@ class Parameter extends Node {
      * This may be either a single, or multiple strings in an array.
      *
      * @param string|array $value
-     *
-     * @return void
      */
-    function setValue($value) {
-
+    public function setValue($value)
+    {
         $this->value = $value;
-
     }
 
     /**
@@ -194,27 +190,23 @@ class Parameter extends Node {
      *
      * @return string|null
      */
-    function getValue() {
-
+    public function getValue()
+    {
         if (is_array($this->value)) {
             return implode(',', $this->value);
         } else {
             return $this->value;
         }
-
     }
 
     /**
      * Sets multiple values for this parameter.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setParts(array $value) {
-
+    public function setParts(array $value)
+    {
         $this->value = $value;
-
     }
 
     /**
@@ -224,8 +216,8 @@ class Parameter extends Node {
      *
      * @return array
      */
-    function getParts() {
-
+    public function getParts()
+    {
         if (is_array($this->value)) {
             return $this->value;
         } elseif (is_null($this->value)) {
@@ -233,7 +225,6 @@ class Parameter extends Node {
         } else {
             return [$this->value];
         }
-
     }
 
     /**
@@ -243,17 +234,14 @@ class Parameter extends Node {
      * parameter value list.
      *
      * @param string|array $part
-     *
-     * @return void
      */
-    function addValue($part) {
-
+    public function addValue($part)
+    {
         if (is_null($this->value)) {
             $this->value = $part;
         } else {
-            $this->value = array_merge((array)$this->value, (array)$part);
+            $this->value = array_merge((array) $this->value, (array) $part);
         }
-
     }
 
     /**
@@ -267,13 +255,12 @@ class Parameter extends Node {
      *
      * @return bool
      */
-    function has($value) {
-
+    public function has($value)
+    {
         return in_array(
             strtolower($value),
-            array_map('strtolower', (array)$this->value)
+            array_map('strtolower', (array) $this->value)
         );
-
     }
 
     /**
@@ -281,25 +268,24 @@ class Parameter extends Node {
      *
      * @return string
      */
-    function serialize() {
-
+    public function serialize()
+    {
         $value = $this->getParts();
 
-        if (count($value) === 0) {
-            return $this->name . '=';
+        if (0 === count($value)) {
+            return $this->name.'=';
         }
 
-        if ($this->root->getDocumentType() === Document::VCARD21 && $this->noName) {
-
+        if (Document::VCARD21 === $this->root->getDocumentType() && $this->noName) {
             return implode(';', $value);
-
         }
 
-        return $this->name . '=' . array_reduce(
+        return $this->name.'='.array_reduce(
             $value,
-            function($out, $item) {
-
-                if (!is_null($out)) $out .= ',';
+            function ($out, $item) {
+                if (!is_null($out)) {
+                    $out .= ',';
+                }
 
                 // If there's no special characters in the string, we'll use the simple
                 // format.
@@ -318,24 +304,23 @@ class Parameter extends Node {
                 // severaly trips on + characters not being quoted, so we
                 // added + as well.
                 if (!preg_match('#(?: [\n":;\^,\+] )#x', $item)) {
-                    return $out . $item;
+                    return $out.$item;
                 } else {
                     // Enclosing in double-quotes, and using RFC6868 for encoding any
                     // special characters
-                    $out .= '"' . strtr(
+                    $out .= '"'.strtr(
                         $item,
                         [
-                            '^'  => '^^',
+                            '^' => '^^',
                             "\n" => '^n',
-                            '"'  => '^\'',
+                            '"' => '^\'',
                         ]
-                    ) . '"';
+                    ).'"';
+
                     return $out;
                 }
-
             }
         );
-
     }
 
     /**
@@ -344,26 +329,22 @@ class Parameter extends Node {
      *
      * @return array
      */
-    function jsonSerialize() {
-
+    public function jsonSerialize()
+    {
         return $this->value;
-
     }
 
     /**
      * This method serializes the data into XML. This is used to create xCard or
      * xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         foreach (explode(',', $this->value) as $value) {
             $writer->writeElement('text', $value);
         }
-
     }
 
     /**
@@ -371,10 +352,9 @@ class Parameter extends Node {
      *
      * @return string
      */
-    function __toString() {
-
-        return (string)$this->getValue();
-
+    public function __toString()
+    {
+        return (string) $this->getValue();
     }
 
     /**
@@ -382,13 +362,12 @@ class Parameter extends Node {
      *
      * @return ElementList
      */
-    function getIterator() {
-
-        if (!is_null($this->iterator))
+    public function getIterator()
+    {
+        if (!is_null($this->iterator)) {
             return $this->iterator;
+        }
 
-        return $this->iterator = new ArrayIterator((array)$this->value);
-
+        return $this->iterator = new ArrayIterator((array) $this->value);
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/ParseException.php b/vendor/sabre/vobject/lib/ParseException.php
index d96d20720..a8f497b24 100644
--- a/vendor/sabre/vobject/lib/ParseException.php
+++ b/vendor/sabre/vobject/lib/ParseException.php
@@ -9,5 +9,6 @@ namespace Sabre\VObject;
  * @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/vobject/lib/Parser/Json.php b/vendor/sabre/vobject/lib/Parser/Json.php
index a77258a2e..3fd307e97 100644
--- a/vendor/sabre/vobject/lib/Parser/Json.php
+++ b/vendor/sabre/vobject/lib/Parser/Json.php
@@ -4,6 +4,7 @@ namespace Sabre\VObject\Parser;
 
 use Sabre\VObject\Component\VCalendar;
 use Sabre\VObject\Component\VCard;
+use Sabre\VObject\Document;
 use Sabre\VObject\EofException;
 use Sabre\VObject\ParseException;
 
@@ -16,8 +17,8 @@ use Sabre\VObject\ParseException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Json extends Parser {
-
+class Json extends Parser
+{
     /**
      * The input data.
      *
@@ -41,12 +42,12 @@ class Json extends Parser {
      * If either input or options are not supplied, the defaults will be used.
      *
      * @param resource|string|array|null $input
-     * @param int $options
+     * @param int                        $options
      *
-     * @return Sabre\VObject\Document
+     * @return \Sabre\VObject\Document
      */
-    function parse($input = null, $options = 0) {
-
+    public function parse($input = null, $options = 0)
+    {
         if (!is_null($input)) {
             $this->setInput($input);
         }
@@ -59,28 +60,28 @@ class Json extends Parser {
         }
 
         switch ($this->input[0]) {
-            case 'vcalendar' :
+            case 'vcalendar':
                 $this->root = new VCalendar([], false);
                 break;
-            case 'vcard' :
+            case 'vcard':
                 $this->root = new VCard([], false);
                 break;
-            default :
+            default:
                 throw new ParseException('The root component must either be a vcalendar, or a vcard');
-
         }
         foreach ($this->input[1] as $prop) {
             $this->root->add($this->parseProperty($prop));
         }
-        if (isset($this->input[2])) foreach ($this->input[2] as $comp) {
-            $this->root->add($this->parseComponent($comp));
+        if (isset($this->input[2])) {
+            foreach ($this->input[2] as $comp) {
+                $this->root->add($this->parseComponent($comp));
+            }
         }
 
         // Resetting the input so we can throw an feof exception the next time.
         $this->input = null;
 
         return $this->root;
-
     }
 
     /**
@@ -90,35 +91,34 @@ class Json extends Parser {
      *
      * @return \Sabre\VObject\Component
      */
-    function parseComponent(array $jComp) {
-
+    public function parseComponent(array $jComp)
+    {
         // We can remove $self from PHP 5.4 onward.
         $self = $this;
 
         $properties = array_map(
-            function($jProp) use ($self) {
+            function ($jProp) use ($self) {
                 return $self->parseProperty($jProp);
             },
             $jComp[1]
         );
 
         if (isset($jComp[2])) {
-
             $components = array_map(
-                function($jComp) use ($self) {
+                function ($jComp) use ($self) {
                     return $self->parseComponent($jComp);
                 },
                 $jComp[2]
             );
-
-        } else $components = [];
+        } else {
+            $components = [];
+        }
 
         return $this->root->createComponent(
             $jComp[0],
             array_merge($properties, $components),
             $defaults = false
         );
-
     }
 
     /**
@@ -128,8 +128,8 @@ class Json extends Parser {
      *
      * @return \Sabre\VObject\Property
      */
-    function parseProperty(array $jProp) {
-
+    public function parseProperty(array $jProp)
+    {
         list(
             $propertyName,
             $parameters,
@@ -142,14 +142,14 @@ class Json extends Parser {
         // value type. We're using this value later in this function.
         $defaultPropertyClass = $this->root->getClassNameForPropertyName($propertyName);
 
-        $parameters = (array)$parameters;
+        $parameters = (array) $parameters;
 
         $value = array_slice($jProp, 3);
 
         $valueType = strtoupper($valueType);
 
         if (isset($parameters['group'])) {
-            $propertyName = $parameters['group'] . '.' . $propertyName;
+            $propertyName = $parameters['group'].'.'.$propertyName;
             unset($parameters['group']);
         }
 
@@ -160,7 +160,7 @@ class Json extends Parser {
         // represents TEXT values. We have to normalize these here. In the
         // future we can get rid of FlatText once we're allowed to break BC
         // again.
-        if ($defaultPropertyClass === 'Sabre\VObject\Property\FlatText') {
+        if ('Sabre\VObject\Property\FlatText' === $defaultPropertyClass) {
             $defaultPropertyClass = 'Sabre\VObject\Property\Text';
         }
 
@@ -168,22 +168,19 @@ class Json extends Parser {
         // type for the given property (e.g.: BDAY), we need to add a VALUE=
         // parameter.
         if ($defaultPropertyClass !== get_class($prop)) {
-            $prop["VALUE"] = $valueType;
+            $prop['VALUE'] = $valueType;
         }
 
         return $prop;
-
     }
 
     /**
      * Sets the input data.
      *
      * @param resource|string|array $input
-     *
-     * @return void
      */
-    function setInput($input) {
-
+    public function setInput($input)
+    {
         if (is_resource($input)) {
             $input = stream_get_contents($input);
         }
@@ -191,7 +188,5 @@ class Json extends Parser {
             $input = json_decode($input);
         }
         $this->input = $input;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Parser/MimeDir.php b/vendor/sabre/vobject/lib/Parser/MimeDir.php
index 742641236..10dcec89c 100644
--- a/vendor/sabre/vobject/lib/Parser/MimeDir.php
+++ b/vendor/sabre/vobject/lib/Parser/MimeDir.php
@@ -7,6 +7,7 @@ use Sabre\VObject\Component\VCalendar;
 use Sabre\VObject\Component\VCard;
 use Sabre\VObject\Document;
 use Sabre\VObject\EofException;
+use Sabre\VObject\Node;
 use Sabre\VObject\ParseException;
 
 /**
@@ -22,8 +23,8 @@ use Sabre\VObject\ParseException;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MimeDir extends Parser {
-
+class MimeDir extends Parser
+{
     /**
      * The input stream.
      *
@@ -70,12 +71,12 @@ class MimeDir extends Parser {
      * used.
      *
      * @param string|resource|null $input
-     * @param int $options
+     * @param int                  $options
      *
-     * @return Sabre\VObject\Document
+     * @return \Sabre\VObject\Document
      */
-    function parse($input = null, $options = 0) {
-
+    public function parse($input = null, $options = 0)
+    {
         $this->root = null;
 
         if (!is_null($input)) {
@@ -89,7 +90,6 @@ class MimeDir extends Parser {
         $this->parseDocument();
 
         return $this->root;
-
     }
 
     /**
@@ -104,24 +104,21 @@ class MimeDir extends Parser {
      *
      * @param string $charset
      */
-    function setCharset($charset) {
-
+    public function setCharset($charset)
+    {
         if (!in_array($charset, self::$SUPPORTED_CHARSETS)) {
-            throw new \InvalidArgumentException('Unsupported encoding. (Supported encodings: ' . implode(', ', self::$SUPPORTED_CHARSETS) . ')');
+            throw new \InvalidArgumentException('Unsupported encoding. (Supported encodings: '.implode(', ', self::$SUPPORTED_CHARSETS).')');
         }
         $this->charset = $charset;
-
     }
 
     /**
      * Sets the input buffer. Must be a string or stream.
      *
      * @param resource|string $input
-     *
-     * @return void
      */
-    function setInput($input) {
-
+    public function setInput($input)
+    {
         // Resetting the parser
         $this->lineIndex = 0;
         $this->startLine = 0;
@@ -137,59 +134,53 @@ class MimeDir extends Parser {
         } else {
             throw new \InvalidArgumentException('This parser can only read from strings or streams.');
         }
-
     }
 
     /**
      * Parses an entire document.
-     *
-     * @return void
      */
-    protected function parseDocument() {
-
+    protected function parseDocument()
+    {
         $line = $this->readLine();
 
         // BOM is ZERO WIDTH NO-BREAK SPACE (U+FEFF).
         // It's 0xEF 0xBB 0xBF in UTF-8 hex.
         if (3 <= strlen($line)
-            && ord($line[0]) === 0xef
-            && ord($line[1]) === 0xbb
-            && ord($line[2]) === 0xbf) {
+            && 0xef === ord($line[0])
+            && 0xbb === ord($line[1])
+            && 0xbf === ord($line[2])) {
             $line = substr($line, 3);
         }
 
         switch (strtoupper($line)) {
-            case 'BEGIN:VCALENDAR' :
+            case 'BEGIN:VCALENDAR':
                 $class = VCalendar::$componentMap['VCALENDAR'];
                 break;
-            case 'BEGIN:VCARD' :
+            case 'BEGIN:VCARD':
                 $class = VCard::$componentMap['VCARD'];
                 break;
-            default :
+            default:
                 throw new ParseException('This parser only supports VCARD and VCALENDAR files');
         }
 
         $this->root = new $class([], false);
 
         while (true) {
-
             // Reading until we hit END:
             $line = $this->readLine();
-            if (strtoupper(substr($line, 0, 4)) === 'END:') {
+            if ('END:' === strtoupper(substr($line, 0, 4))) {
                 break;
             }
             $result = $this->parseLine($line);
             if ($result) {
                 $this->root->add($result);
             }
-
         }
 
         $name = strtoupper(substr($line, 4));
         if ($name !== $this->root->name) {
-            throw new ParseException('Invalid MimeDir file. expected: "END:' . $this->root->name . '" got: "END:' . $name . '"');
+            throw new ParseException('Invalid MimeDir file. expected: "END:'.$this->root->name.'" got: "END:'.$name.'"');
         }
-
     }
 
     /**
@@ -200,46 +191,40 @@ class MimeDir extends Parser {
      *
      * @return Node
      */
-    protected function parseLine($line) {
-
+    protected function parseLine($line)
+    {
         // Start of a new component
-        if (strtoupper(substr($line, 0, 6)) === 'BEGIN:') {
-
+        if ('BEGIN:' === strtoupper(substr($line, 0, 6))) {
             $component = $this->root->createComponent(substr($line, 6), [], false);
 
             while (true) {
-
                 // Reading until we hit END:
                 $line = $this->readLine();
-                if (strtoupper(substr($line, 0, 4)) === 'END:') {
+                if ('END:' === strtoupper(substr($line, 0, 4))) {
                     break;
                 }
                 $result = $this->parseLine($line);
                 if ($result) {
                     $component->add($result);
                 }
-
             }
 
             $name = strtoupper(substr($line, 4));
             if ($name !== $component->name) {
-                throw new ParseException('Invalid MimeDir file. expected: "END:' . $component->name . '" got: "END:' . $name . '"');
+                throw new ParseException('Invalid MimeDir file. expected: "END:'.$component->name.'" got: "END:'.$name.'"');
             }
 
             return $component;
-
         } else {
-
             // Property reader
             $property = $this->readProperty($line);
             if (!$property) {
                 // Ignored line
                 return false;
             }
-            return $property;
 
+            return $property;
         }
-
     }
 
     /**
@@ -248,7 +233,7 @@ class MimeDir extends Parser {
      *
      * If that was not the case, we store it here.
      *
-     * @var null|string
+     * @var string|null
      */
     protected $lineBuffer;
 
@@ -281,8 +266,8 @@ class MimeDir extends Parser {
      *
      * @return string
      */
-    protected function readLine() {
-
+    protected function readLine()
+    {
         if (!\is_null($this->lineBuffer)) {
             $rawLine = $this->lineBuffer;
             $this->lineBuffer = null;
@@ -292,15 +277,15 @@ class MimeDir extends Parser {
 
                 $rawLine = \fgets($this->input);
 
-                if ($eof || (\feof($this->input) && $rawLine === false)) {
+                if ($eof || (\feof($this->input) && false === $rawLine)) {
                     throw new EofException('End of document reached prematurely');
                 }
-                if ($rawLine === false) {
+                if (false === $rawLine) {
                     throw new ParseException('Error reading from input stream');
                 }
                 $rawLine = \rtrim($rawLine, "\r\n");
-            } while ($rawLine === ''); // Skipping empty lines
-            $this->lineIndex++;
+            } while ('' === $rawLine); // Skipping empty lines
+            ++$this->lineIndex;
         }
         $line = $rawLine;
 
@@ -308,34 +293,30 @@ class MimeDir extends Parser {
 
         // Looking ahead for folded lines.
         while (true) {
-
             $nextLine = \rtrim(\fgets($this->input), "\r\n");
-            $this->lineIndex++;
+            ++$this->lineIndex;
             if (!$nextLine) {
                 break;
             }
-            if ($nextLine[0] === "\t" || $nextLine[0] === " ") {
+            if ("\t" === $nextLine[0] || ' ' === $nextLine[0]) {
                 $curLine = \substr($nextLine, 1);
                 $line .= $curLine;
-                $rawLine .= "\n " . $curLine;
+                $rawLine .= "\n ".$curLine;
             } else {
                 $this->lineBuffer = $nextLine;
                 break;
             }
-
         }
         $this->rawLine = $rawLine;
-        return $line;
 
+        return $line;
     }
 
     /**
      * Reads a property or component from a line.
-     *
-     * @return void
      */
-    protected function readProperty($line) {
-
+    protected function readProperty($line)
+    {
         if ($this->options & self::OPTION_FORGIVING) {
             $propNameToken = 'A-Z0-9\-\._\\/';
         } else {
@@ -360,17 +341,17 @@ class MimeDir extends Parser {
             /xi";
 
         //echo $regex, "\n"; die();
-        preg_match_all($regex, $line, $matches,  PREG_SET_ORDER);
+        preg_match_all($regex, $line, $matches, PREG_SET_ORDER);
 
         $property = [
-            'name'       => null,
+            'name' => null,
             'parameters' => [],
-            'value'      => null
+            'value' => null,
         ];
 
         $lastParam = null;
 
-        /**
+        /*
          * Looping through all the tokens.
          *
          * Note that we are looping through them in reverse order, because if a
@@ -378,9 +359,8 @@ class MimeDir extends Parser {
          * in the result.
          */
         foreach ($matches as $match) {
-
             if (isset($match['paramValue'])) {
-                if ($match['paramValue'] && $match['paramValue'][0] === '"') {
+                if ($match['paramValue'] && '"' === $match['paramValue'][0]) {
                     $value = substr($match['paramValue'], 1, -1);
                 } else {
                     $value = $match['paramValue'];
@@ -389,7 +369,7 @@ class MimeDir extends Parser {
                 $value = $this->unescapeParam($value);
 
                 if (is_null($lastParam)) {
-                    throw new ParseException('Invalid Mimedir file. Line starting at ' . $this->startLine . ' did not follow iCalendar/vCard conventions');
+                    throw new ParseException('Invalid Mimedir file. Line starting at '.$this->startLine.' did not follow iCalendar/vCard conventions');
                 }
                 if (is_null($property['parameters'][$lastParam])) {
                     $property['parameters'][$lastParam] = $value;
@@ -398,7 +378,7 @@ class MimeDir extends Parser {
                 } else {
                     $property['parameters'][$lastParam] = [
                         $property['parameters'][$lastParam],
-                        $value
+                        $value,
                     ];
                 }
                 continue;
@@ -422,7 +402,6 @@ class MimeDir extends Parser {
             // @codeCoverageIgnoreStart
             throw new \LogicException('This code should not be reachable');
             // @codeCoverageIgnoreEnd
-
         }
 
         if (is_null($property['value'])) {
@@ -432,11 +411,11 @@ class MimeDir extends Parser {
             if ($this->options & self::OPTION_IGNORE_INVALID_LINES) {
                 return false;
             }
-            throw new ParseException('Invalid Mimedir file. Line starting at ' . $this->startLine . ' did not follow iCalendar/vCard conventions');
+            throw new ParseException('Invalid Mimedir file. Line starting at '.$this->startLine.' did not follow iCalendar/vCard conventions');
         }
 
         // vCard 2.1 states that parameters may appear without a name, and only
-        // a value. We can deduce the value based on it's name.
+        // a value. We can deduce the value based on its name.
         //
         // Our parser will get those as parameters without a value instead, so
         // we're filtering these parameters out first.
@@ -457,31 +436,30 @@ class MimeDir extends Parser {
             $propObj->add(null, $namelessParameter);
         }
 
-        if (strtoupper($propObj['ENCODING']) === 'QUOTED-PRINTABLE') {
+        if ('QUOTED-PRINTABLE' === strtoupper($propObj['ENCODING'])) {
             $propObj->setQuotedPrintableValue($this->extractQuotedPrintableValue());
         } else {
             $charset = $this->charset;
-            if ($this->root->getDocumentType() === Document::VCARD21 && isset($propObj['CHARSET'])) {
+            if (Document::VCARD21 === $this->root->getDocumentType() && isset($propObj['CHARSET'])) {
                 // vCard 2.1 allows the character set to be specified per property.
-                $charset = (string)$propObj['CHARSET'];
+                $charset = (string) $propObj['CHARSET'];
             }
             switch (strtolower($charset)) {
-                case 'utf-8' :
+                case 'utf-8':
                     break;
-                case 'iso-8859-1' :
+                case 'iso-8859-1':
                     $property['value'] = utf8_encode($property['value']);
                     break;
-                case 'windows-1252' :
+                case 'windows-1252':
                     $property['value'] = mb_convert_encoding($property['value'], 'UTF-8', $charset);
                     break;
-                default :
-                    throw new ParseException('Unsupported CHARSET: ' . $propObj['CHARSET']);
+                default:
+                    throw new ParseException('Unsupported CHARSET: '.$propObj['CHARSET']);
             }
             $propObj->setRawMimeDirValue($property['value']);
         }
 
         return $propObj;
-
     }
 
     /**
@@ -546,11 +524,11 @@ class MimeDir extends Parser {
      *
      * @return string|string[]
      */
-    static function unescapeValue($input, $delimiter = ';') {
-
+    public static function unescapeValue($input, $delimiter = ';')
+    {
         $regex = '#  (?: (\\\\ (?: \\\\ | N | n | ; | , ) )';
         if ($delimiter) {
-            $regex .= ' | (' . $delimiter . ')';
+            $regex .= ' | ('.$delimiter.')';
         }
         $regex .= ') #x';
 
@@ -560,36 +538,33 @@ class MimeDir extends Parser {
         $result = '';
 
         foreach ($matches as $match) {
-
             switch ($match) {
-                case '\\\\' :
+                case '\\\\':
                     $result .= '\\';
                     break;
-                case '\N' :
-                case '\n' :
+                case '\N':
+                case '\n':
                     $result .= "\n";
                     break;
-                case '\;' :
+                case '\;':
                     $result .= ';';
                     break;
-                case '\,' :
+                case '\,':
                     $result .= ',';
                     break;
-                case $delimiter :
+                case $delimiter:
                     $resultArray[] = $result;
                     $result = '';
                     break;
-                default :
+                default:
                     $result .= $match;
                     break;
-
             }
-
         }
 
         $resultArray[] = $result;
-        return $delimiter ? $resultArray : $result;
 
+        return $delimiter ? $resultArray : $result;
     }
 
     /**
@@ -623,21 +598,19 @@ class MimeDir extends Parser {
      *   * " is encoded as ^'
      *
      * @param string $input
-     *
-     * @return void
      */
-    private function unescapeParam($input) {
-
+    private function unescapeParam($input)
+    {
         return
             preg_replace_callback(
                 '#(\^(\^|n|\'))#',
-                function($matches) {
+                function ($matches) {
                     switch ($matches[2]) {
-                        case 'n' :
+                        case 'n':
                             return "\n";
-                        case '^' :
+                        case '^':
                             return '^';
-                        case '\'' :
+                        case '\'':
                             return '"';
 
                     // @codeCoverageIgnoreStart
@@ -658,8 +631,8 @@ class MimeDir extends Parser {
      *
      * @return string
      */
-    private function extractQuotedPrintableValue() {
-
+    private function extractQuotedPrintableValue()
+    {
         // We need to parse the raw line again to get the start of the value.
         //
         // We are basically looking for the first colon (:), but we need to
@@ -682,16 +655,14 @@ class MimeDir extends Parser {
         // missing a whitespace. So if 'forgiving' is turned on, we will take
         // those as well.
         if ($this->options & self::OPTION_FORGIVING) {
-            while (substr($value, -1) === '=') {
+            while ('=' === substr($value, -1)) {
                 // Reading the line
                 $this->readLine();
                 // Grabbing the raw form
-                $value .= "\n" . $this->rawLine;
+                $value .= "\n".$this->rawLine;
             }
         }
 
         return $value;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Parser/Parser.php b/vendor/sabre/vobject/lib/Parser/Parser.php
index ca8bc0add..b7b611430 100644
--- a/vendor/sabre/vobject/lib/Parser/Parser.php
+++ b/vendor/sabre/vobject/lib/Parser/Parser.php
@@ -11,8 +11,8 @@ namespace Sabre\VObject\Parser;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Parser {
-
+abstract class Parser
+{
     /**
      * Turning on this option makes the parser more forgiving.
      *
@@ -41,12 +41,10 @@ abstract class Parser {
      * Optionally, it's possible to parse the input stream here.
      *
      * @param mixed $input
-     * @param int $options Any parser options (OPTION constants).
-     *
-     * @return void
+     * @param int   $options any parser options (OPTION constants)
      */
-    function __construct($input = null, $options = 0) {
-
+    public function __construct($input = null, $options = 0)
+    {
         if (!is_null($input)) {
             $this->setInput($input);
         }
@@ -62,19 +60,16 @@ abstract class Parser {
      * If either input or options are not supplied, the defaults will be used.
      *
      * @param mixed $input
-     * @param int $options
+     * @param int   $options
      *
      * @return array
      */
-    abstract function parse($input = null, $options = 0);
+    abstract public function parse($input = null, $options = 0);
 
     /**
      * Sets the input data.
      *
      * @param mixed $input
-     *
-     * @return void
      */
-    abstract function setInput($input);
-
+    abstract public function setInput($input);
 }
diff --git a/vendor/sabre/vobject/lib/Parser/XML.php b/vendor/sabre/vobject/lib/Parser/XML.php
index 5ac423984..90f262d9e 100644
--- a/vendor/sabre/vobject/lib/Parser/XML.php
+++ b/vendor/sabre/vobject/lib/Parser/XML.php
@@ -18,8 +18,8 @@ use Sabre\Xml as SabreXml;
  * @author Ivan Enderlin
  * @license http://sabre.io/license/ Modified BSD License
  */
-class XML extends Parser {
-
+class XML extends Parser
+{
     const XCAL_NAMESPACE = 'urn:ietf:params:xml:ns:icalendar-2.0';
     const XCARD_NAMESPACE = 'urn:ietf:params:xml:ns:vcard-4.0';
 
@@ -40,7 +40,7 @@ class XML extends Parser {
     /**
      * Document, root component.
      *
-     * @var Sabre\VObject\Document
+     * @var \Sabre\VObject\Document
      */
     protected $root;
 
@@ -50,32 +50,29 @@ class XML extends Parser {
      * Optionally, it's possible to parse the input stream here.
      *
      * @param mixed $input
-     * @param int $options Any parser options (OPTION constants).
-     *
-     * @return void
+     * @param int   $options any parser options (OPTION constants)
      */
-    function __construct($input = null, $options = 0) {
-
+    public function __construct($input = null, $options = 0)
+    {
         if (0 === $options) {
             $options = parent::OPTION_FORGIVING;
         }
 
         parent::__construct($input, $options);
-
     }
 
     /**
      * Parse xCal or xCard.
      *
      * @param resource|string $input
-     * @param int $options
+     * @param int             $options
      *
      * @throws \Exception
      *
-     * @return Sabre\VObject\Document
+     * @return \Sabre\VObject\Document
      */
-    function parse($input = null, $options = 0) {
-
+    public function parse($input = null, $options = 0)
+    {
         if (!is_null($input)) {
             $this->setInput($input);
         }
@@ -89,29 +86,25 @@ class XML extends Parser {
         }
 
         switch ($this->input['name']) {
-
-            case '{' . self::XCAL_NAMESPACE . '}icalendar':
+            case '{'.self::XCAL_NAMESPACE.'}icalendar':
                 $this->root = new VCalendar([], false);
                 $this->pointer = &$this->input['value'][0];
                 $this->parseVCalendarComponents($this->root);
                 break;
 
-            case '{' . self::XCARD_NAMESPACE . '}vcards':
+            case '{'.self::XCARD_NAMESPACE.'}vcards':
                 foreach ($this->input['value'] as &$vCard) {
-
                     $this->root = new VCard(['version' => '4.0'], false);
                     $this->pointer = &$vCard;
                     $this->parseVCardComponents($this->root);
 
                     // We just parse the first <vcard /> element.
                     break;
-
                 }
                 break;
 
             default:
                 throw new ParseException('Unsupported XML standard');
-
         }
 
         return $this->root;
@@ -121,15 +114,11 @@ class XML extends Parser {
      * Parse a xCalendar component.
      *
      * @param Component $parentComponent
-     *
-     * @return void
      */
-    protected function parseVCalendarComponents(Component $parentComponent) {
-
+    protected function parseVCalendarComponents(Component $parentComponent)
+    {
         foreach ($this->pointer['value'] ?: [] as $children) {
-
             switch (static::getTagName($children['name'])) {
-
                 case 'properties':
                     $this->pointer = &$children['value'];
                     $this->parseProperties($parentComponent);
@@ -141,35 +130,28 @@ class XML extends Parser {
                     break;
             }
         }
-
     }
 
     /**
      * Parse a xCard component.
      *
      * @param Component $parentComponent
-     *
-     * @return void
      */
-    protected function parseVCardComponents(Component $parentComponent) {
-
+    protected function parseVCardComponents(Component $parentComponent)
+    {
         $this->pointer = &$this->pointer['value'];
         $this->parseProperties($parentComponent);
-
     }
 
     /**
      * Parse xCalendar and xCard properties.
      *
      * @param Component $parentComponent
-     * @param string  $propertyNamePrefix
-     *
-     * @return void
+     * @param string    $propertyNamePrefix
      */
-    protected function parseProperties(Component $parentComponent, $propertyNamePrefix = '') {
-
+    protected function parseProperties(Component $parentComponent, $propertyNamePrefix = '')
+    {
         foreach ($this->pointer ?: [] as $xmlProperty) {
-
             list($namespace, $tagName) = SabreXml\Service::parseClarkNotation($xmlProperty['name']);
 
             $propertyName = $tagName;
@@ -178,17 +160,16 @@ class XML extends Parser {
             $propertyType = 'text';
 
             // A property which is not part of the standard.
-            if ($namespace !== self::XCAL_NAMESPACE
-                && $namespace !== self::XCARD_NAMESPACE) {
-
+            if (self::XCAL_NAMESPACE !== $namespace
+                && self::XCARD_NAMESPACE !== $namespace) {
                 $propertyName = 'xml';
-                $value = '<' . $tagName . ' xmlns="' . $namespace . '"';
+                $value = '<'.$tagName.' xmlns="'.$namespace.'"';
 
                 foreach ($xmlProperty['attributes'] as $attributeName => $attributeValue) {
-                    $value .= ' ' . $attributeName . '="' . str_replace('"', '\"', $attributeValue) . '"';
+                    $value .= ' '.$attributeName.'="'.str_replace('"', '\"', $attributeValue).'"';
                 }
 
-                $value .= '>' . $xmlProperty['value'] . '</' . $tagName . '>';
+                $value .= '>'.$xmlProperty['value'].'</'.$tagName.'>';
 
                 $propertyValue = [$value];
 
@@ -204,8 +185,7 @@ class XML extends Parser {
             }
 
             // xCard group.
-            if ($propertyName === 'group') {
-
+            if ('group' === $propertyName) {
                 if (!isset($xmlProperty['attributes']['name'])) {
                     continue;
                 }
@@ -213,24 +193,22 @@ class XML extends Parser {
                 $this->pointer = &$xmlProperty['value'];
                 $this->parseProperties(
                     $parentComponent,
-                    strtoupper($xmlProperty['attributes']['name']) . '.'
+                    strtoupper($xmlProperty['attributes']['name']).'.'
                 );
 
                 continue;
-
             }
 
             // Collect parameters.
             foreach ($xmlProperty['value'] as $i => $xmlPropertyChild) {
-
                 if (!is_array($xmlPropertyChild)
-                    || 'parameters' !== static::getTagName($xmlPropertyChild['name']))
+                    || 'parameters' !== static::getTagName($xmlPropertyChild['name'])) {
                     continue;
+                }
 
                 $xmlParameters = $xmlPropertyChild['value'];
 
                 foreach ($xmlParameters as $xmlParameter) {
-
                     $propertyParameterValues = [];
 
                     foreach ($xmlParameter['value'] as $xmlParameterValues) {
@@ -239,19 +217,16 @@ class XML extends Parser {
 
                     $propertyParameters[static::getTagName($xmlParameter['name'])]
                         = implode(',', $propertyParameterValues);
-
                 }
 
                 array_splice($xmlProperty['value'], $i, 1);
-
             }
 
             $propertyNameExtended = ($this->root instanceof VCalendar
                                       ? 'xcal'
-                                      : 'xcard') . ':' . $propertyName;
+                                      : 'xcard').':'.$propertyName;
 
             switch ($propertyNameExtended) {
-
                 case 'xcal:geo':
                     $propertyType = 'float';
                     $propertyValue['latitude'] = 0;
@@ -277,6 +252,7 @@ class XML extends Parser {
                     // We don't break because we only want to set
                     // another property type.
 
+                    // no break
                 case 'xcal:categories':
                 case 'xcal:resources':
                 case 'xcal:exdate':
@@ -290,16 +266,12 @@ class XML extends Parser {
                     $propertyType = 'date-time';
 
                     foreach ($xmlProperty['value'] as $specialChild) {
-
                         $tagName = static::getTagName($specialChild['name']);
 
                         if ('period' === $tagName) {
-
                             $propertyParameters['value'] = 'PERIOD';
                             $propertyValue[] = implode('/', $specialChild['value']);
-
-                        }
-                        else {
+                        } else {
                             $propertyValue[] = $specialChild['value'];
                         }
                     }
@@ -320,29 +292,24 @@ class XML extends Parser {
 
             $this->createProperty(
                 $parentComponent,
-                $propertyNamePrefix . $propertyName,
+                $propertyNamePrefix.$propertyName,
                 $propertyParameters,
                 $propertyType,
                 $propertyValue
             );
-
         }
-
     }
 
     /**
      * Parse a component.
      *
      * @param Component $parentComponent
-     *
-     * @return void
      */
-    protected function parseComponent(Component $parentComponent) {
-
+    protected function parseComponent(Component $parentComponent)
+    {
         $components = $this->pointer['value'] ?: [];
 
         foreach ($components as $component) {
-
             $componentName = static::getTagName($component['name']);
             $currentComponent = $this->root->createComponent(
                 $componentName,
@@ -354,24 +321,20 @@ class XML extends Parser {
             $this->parseVCalendarComponents($currentComponent);
 
             $parentComponent->add($currentComponent);
-
         }
-
     }
 
     /**
      * Create a property.
      *
      * @param Component $parentComponent
-     * @param string $name
-     * @param array $parameters
-     * @param string $type
-     * @param mixed $value
-     *
-     * @return void
+     * @param string    $name
+     * @param array     $parameters
+     * @param string    $type
+     * @param mixed     $value
      */
-    protected function createProperty(Component $parentComponent, $name, $parameters, $type, $value) {
-
+    protected function createProperty(Component $parentComponent, $name, $parameters, $type, $value)
+    {
         $property = $this->root->createProperty(
             $name,
             null,
@@ -380,36 +343,30 @@ class XML extends Parser {
         );
         $parentComponent->add($property);
         $property->setXmlValue($value);
-
     }
 
     /**
      * Sets the input data.
      *
      * @param resource|string $input
-     *
-     * @return void
      */
-    function setInput($input) {
-
+    public function setInput($input)
+    {
         if (is_resource($input)) {
             $input = stream_get_contents($input);
         }
 
         if (is_string($input)) {
-
             $reader = new SabreXml\Reader();
-            $reader->elementMap['{' . self::XCAL_NAMESPACE . '}period']
+            $reader->elementMap['{'.self::XCAL_NAMESPACE.'}period']
                 = 'Sabre\VObject\Parser\XML\Element\KeyValue';
-            $reader->elementMap['{' . self::XCAL_NAMESPACE . '}recur']
+            $reader->elementMap['{'.self::XCAL_NAMESPACE.'}recur']
                 = 'Sabre\VObject\Parser\XML\Element\KeyValue';
             $reader->xml($input);
             $input = $reader->parse();
-
         }
 
         $this->input = $input;
-
     }
 
     /**
@@ -419,10 +376,10 @@ class XML extends Parser {
      *
      * @return string
      */
-    protected static function getTagName($clarkedTagName) {
-
+    protected static function getTagName($clarkedTagName)
+    {
         list(, $tagName) = SabreXml\Service::parseClarkNotation($clarkedTagName);
-        return $tagName;
 
+        return $tagName;
     }
 }
diff --git a/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php b/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php
index 14d798433..e26540036 100644
--- a/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php
+++ b/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php
@@ -13,8 +13,8 @@ use Sabre\Xml as SabreXml;
  * @author Ivan Enderlin
  * @license http://sabre.io/license/ Modified BSD License
  */
-class KeyValue extends SabreXml\Element\KeyValue {
-
+class KeyValue extends SabreXml\Element\KeyValue
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -37,11 +37,12 @@ class KeyValue extends SabreXml\Element\KeyValue {
      *
      * @return mixed
      */
-    static function xmlDeserialize(SabreXml\Reader $reader) {
-
+    public static function xmlDeserialize(SabreXml\Reader $reader)
+    {
         // If there's no children, we don't do anything.
         if ($reader->isEmptyElement) {
             $reader->next();
+
             return [];
         }
 
@@ -49,22 +50,16 @@ class KeyValue extends SabreXml\Element\KeyValue {
         $reader->read();
 
         do {
-
-            if ($reader->nodeType === SabreXml\Reader::ELEMENT) {
-
+            if (SabreXml\Reader::ELEMENT === $reader->nodeType) {
                 $name = $reader->localName;
                 $values[$name] = $reader->parseCurrentElement()['value'];
-
             } else {
                 $reader->read();
             }
-
-        } while ($reader->nodeType !== SabreXml\Reader::END_ELEMENT);
+        } while (SabreXml\Reader::END_ELEMENT !== $reader->nodeType);
 
         $reader->read();
 
         return $values;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property.php b/vendor/sabre/vobject/lib/Property.php
index 3d1775fa2..6105cb0f0 100644
--- a/vendor/sabre/vobject/lib/Property.php
+++ b/vendor/sabre/vobject/lib/Property.php
@@ -14,8 +14,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Property extends Node {
-
+abstract class Property extends Node
+{
     /**
      * Property name.
      *
@@ -61,16 +61,14 @@ abstract class Property extends Node {
      *
      * Parameters must be specified in key=>value syntax.
      *
-     * @param Component $root The root document
-     * @param string $name
+     * @param Component         $root       The root document
+     * @param string            $name
      * @param string|array|null $value
-     * @param array $parameters List of parameters
-     * @param string $group The vcard property group
-     *
-     * @return void
+     * @param array             $parameters List of parameters
+     * @param string            $group      The vcard property group
      */
-    function __construct(Component $root, $name, $value = null, array $parameters = [], $group = null) {
-
+    public function __construct(Component $root, $name, $value = null, array $parameters = [], $group = null)
+    {
         $this->name = $name;
         $this->group = $group;
 
@@ -83,7 +81,6 @@ abstract class Property extends Node {
         if (!is_null($value)) {
             $this->setValue($value);
         }
-
     }
 
     /**
@@ -92,13 +89,10 @@ abstract class Property extends Node {
      * This may be either a single, or multiple strings in an array.
      *
      * @param string|array $value
-     *
-     * @return void
      */
-    function setValue($value) {
-
+    public function setValue($value)
+    {
         $this->value = $value;
-
     }
 
     /**
@@ -112,12 +106,12 @@ abstract class Property extends Node {
      *
      * @return string
      */
-    function getValue() {
-
+    public function getValue()
+    {
         if (is_array($this->value)) {
-            if (count($this->value) == 0) {
+            if (0 == count($this->value)) {
                 return;
-            } elseif (count($this->value) === 1) {
+            } elseif (1 === count($this->value)) {
                 return $this->value[0];
             } else {
                 return $this->getRawMimeDirValue();
@@ -125,20 +119,16 @@ abstract class Property extends Node {
         } else {
             return $this->value;
         }
-
     }
 
     /**
      * Sets a multi-valued property.
      *
      * @param array $parts
-     *
-     * @return void
      */
-    function setParts(array $parts) {
-
+    public function setParts(array $parts)
+    {
         $this->value = $parts;
-
     }
 
     /**
@@ -149,8 +139,8 @@ abstract class Property extends Node {
      *
      * @return array
      */
-    function getParts() {
-
+    public function getParts()
+    {
         if (is_null($this->value)) {
             return [];
         } elseif (is_array($this->value)) {
@@ -158,7 +148,6 @@ abstract class Property extends Node {
         } else {
             return [$this->value];
         }
-
     }
 
     /**
@@ -166,22 +155,22 @@ abstract class Property extends Node {
      *
      * If a parameter with same name already existed, the values will be
      * combined.
-     * If nameless parameter is added, we try to guess it's name.
+     * If nameless parameter is added, we try to guess its name.
      *
-     * @param string $name
-     * @param string|null|array $value
+     * @param string            $name
+     * @param string|array|null $value
      */
-    function add($name, $value = null) {
+    public function add($name, $value = null)
+    {
         $noName = false;
-        if ($name === null) {
+        if (null === $name) {
             $name = Parameter::guessParameterNameByValue($value);
             $noName = true;
         }
 
         if (isset($this->parameters[strtoupper($name)])) {
             $this->parameters[strtoupper($name)]->addValue($value);
-        }
-        else {
+        } else {
             $param = new Parameter($this->root, $name, $value);
             $param->noName = $noName;
             $this->parameters[$param->name] = $param;
@@ -193,10 +182,9 @@ abstract class Property extends Node {
      *
      * @return array
      */
-    function parameters() {
-
+    public function parameters()
+    {
         return $this->parameters;
-
     }
 
     /**
@@ -207,7 +195,7 @@ abstract class Property extends Node {
      *
      * @return string
      */
-    abstract function getValueType();
+    abstract public function getValueType();
 
     /**
      * Sets a raw value coming from a mimedir (iCalendar/vCard) file.
@@ -216,35 +204,33 @@ abstract class Property extends Node {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    abstract function setRawMimeDirValue($val);
+    abstract public function setRawMimeDirValue($val);
 
     /**
      * Returns a raw mime-dir representation of the value.
      *
      * @return string
      */
-    abstract function getRawMimeDirValue();
+    abstract public function getRawMimeDirValue();
 
     /**
      * Turns the object back into a serialized blob.
      *
      * @return string
      */
-    function serialize() {
-
+    public function serialize()
+    {
         $str = $this->name;
-        if ($this->group) $str = $this->group . '.' . $this->name;
+        if ($this->group) {
+            $str = $this->group.'.'.$this->name;
+        }
 
         foreach ($this->parameters() as $param) {
-
-            $str .= ';' . $param->serialize();
-
+            $str .= ';'.$param->serialize();
         }
 
-        $str .= ':' . $this->getRawMimeDirValue();
+        $str .= ':'.$this->getRawMimeDirValue();
 
         $str = \preg_replace(
             '/(
@@ -258,7 +244,6 @@ abstract class Property extends Node {
 
         // remove single space after last CRLF
         return \substr($str, 0, -1);
-
     }
 
     /**
@@ -268,10 +253,9 @@ abstract class Property extends Node {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         return $this->getParts();
-
     }
 
     /**
@@ -280,17 +264,14 @@ abstract class Property extends Node {
      * The value must always be an array.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setJsonValue(array $value) {
-
-        if (count($value) === 1) {
+    public function setJsonValue(array $value)
+    {
+        if (1 === count($value)) {
             $this->setValue(reset($value));
         } else {
             $this->setValue($value);
         }
-
     }
 
     /**
@@ -299,12 +280,12 @@ abstract class Property extends Node {
      *
      * @return array
      */
-    function jsonSerialize() {
-
+    public function jsonSerialize()
+    {
         $parameters = [];
 
         foreach ($this->parameters as $parameter) {
-            if ($parameter->name === 'VALUE') {
+            if ('VALUE' === $parameter->name) {
                 continue;
             }
             $parameters[strtolower($parameter->name)] = $parameter->jsonSerialize();
@@ -318,7 +299,7 @@ abstract class Property extends Node {
         return array_merge(
             [
                 strtolower($this->name),
-                (object)$parameters,
+                (object) $parameters,
                 strtolower($this->getValueType()),
             ],
             $this->getJsonValue()
@@ -330,78 +311,63 @@ abstract class Property extends Node {
      * object.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setXmlValue(array $value) {
-
+    public function setXmlValue(array $value)
+    {
         $this->setJsonValue($value);
-
     }
 
     /**
      * This method serializes the data into XML. This is used to create xCard or
      * xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    function xmlSerialize(Xml\Writer $writer) {
-
+    public function xmlSerialize(Xml\Writer $writer)
+    {
         $parameters = [];
 
         foreach ($this->parameters as $parameter) {
-
-            if ($parameter->name === 'VALUE') {
+            if ('VALUE' === $parameter->name) {
                 continue;
             }
 
             $parameters[] = $parameter;
-
         }
 
         $writer->startElement(strtolower($this->name));
 
         if (!empty($parameters)) {
-
             $writer->startElement('parameters');
 
             foreach ($parameters as $parameter) {
-
                 $writer->startElement(strtolower($parameter->name));
                 $writer->write($parameter);
                 $writer->endElement();
-
             }
 
             $writer->endElement();
-
         }
 
         $this->xmlSerializeValue($writer);
         $writer->endElement();
-
     }
 
     /**
      * This method serializes only the value of a property. This is used to
      * create xCard or xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    protected function xmlSerializeValue(Xml\Writer $writer) {
-
+    protected function xmlSerializeValue(Xml\Writer $writer)
+    {
         $valueType = strtolower($this->getValueType());
 
         foreach ($this->getJsonValue() as $values) {
-            foreach ((array)$values as $value) {
+            foreach ((array) $values as $value) {
                 $writer->writeElement($valueType, $value);
             }
         }
-
     }
 
     /**
@@ -413,10 +379,9 @@ abstract class Property extends Node {
      *
      * @return string
      */
-    function __toString() {
-
-        return (string)$this->getValue();
-
+    public function __toString()
+    {
+        return (string) $this->getValue();
     }
 
     /* ArrayAccess interface {{{ */
@@ -428,17 +393,21 @@ abstract class Property extends Node {
      *
      * @return bool
      */
-    function offsetExists($name) {
-
-        if (is_int($name)) return parent::offsetExists($name);
+    public function offsetExists($name)
+    {
+        if (is_int($name)) {
+            return parent::offsetExists($name);
+        }
 
         $name = strtoupper($name);
 
         foreach ($this->parameters as $parameter) {
-            if ($parameter->name == $name) return true;
+            if ($parameter->name == $name) {
+                return true;
+            }
         }
-        return false;
 
+        return false;
     }
 
     /**
@@ -450,9 +419,11 @@ abstract class Property extends Node {
      *
      * @return Node
      */
-    function offsetGet($name) {
-
-        if (is_int($name)) return parent::offsetGet($name);
+    public function offsetGet($name)
+    {
+        if (is_int($name)) {
+            return parent::offsetGet($name);
+        }
         $name = strtoupper($name);
 
         if (!isset($this->parameters[$name])) {
@@ -460,19 +431,16 @@ abstract class Property extends Node {
         }
 
         return $this->parameters[$name];
-
     }
 
     /**
      * Creates a new parameter.
      *
      * @param string $name
-     * @param mixed $value
-     *
-     * @return void
+     * @param mixed  $value
      */
-    function offsetSet($name, $value) {
-
+    public function offsetSet($name, $value)
+    {
         if (is_int($name)) {
             parent::offsetSet($name, $value);
             // @codeCoverageIgnoreStart
@@ -484,18 +452,15 @@ abstract class Property extends Node {
 
         $param = new Parameter($this->root, $name, $value);
         $this->parameters[$param->name] = $param;
-
     }
 
     /**
      * Removes one or more parameters with the specified name.
      *
      * @param string $name
-     *
-     * @return void
      */
-    function offsetUnset($name) {
-
+    public function offsetUnset($name)
+    {
         if (is_int($name)) {
             parent::offsetUnset($name);
             // @codeCoverageIgnoreStart
@@ -506,23 +471,20 @@ abstract class Property extends Node {
         }
 
         unset($this->parameters[strtoupper($name)]);
-
     }
+
     /* }}} */
 
     /**
      * This method is automatically called when the object is cloned.
      * Specifically, this will ensure all child elements are also cloned.
-     *
-     * @return void
      */
-    function __clone() {
-
+    public function __clone()
+    {
         foreach ($this->parameters as $key => $child) {
             $this->parameters[$key] = clone $child;
             $this->parameters[$key]->parent = $this;
         }
-
     }
 
     /**
@@ -543,13 +505,12 @@ abstract class Property extends Node {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $warnings = [];
 
         // Checking if our value is UTF-8
         if (!StringUtil::isUTF8($this->getRawMimeDirValue())) {
-
             $oldValue = $this->getRawMimeDirValue();
             $level = 3;
             if ($options & self::REPAIR) {
@@ -558,29 +519,27 @@ abstract class Property extends Node {
                     $this->setRawMimeDirValue($newValue);
                     $level = 1;
                 }
-
             }
 
-
             if (preg_match('%([\x00-\x08\x0B-\x0C\x0E-\x1F\x7F])%', $oldValue, $matches)) {
-                $message = 'Property contained a control character (0x' . bin2hex($matches[1]) . ')';
+                $message = 'Property contained a control character (0x'.bin2hex($matches[1]).')';
             } else {
-                $message = 'Property is not valid UTF-8! ' . $oldValue;
+                $message = 'Property is not valid UTF-8! '.$oldValue;
             }
 
             $warnings[] = [
-                'level'   => $level,
+                'level' => $level,
                 'message' => $message,
-                'node'    => $this,
+                'node' => $this,
             ];
         }
 
         // Checking if the propertyname does not contain any invalid bytes.
         if (!preg_match('/^([A-Z0-9-]+)$/', $this->name)) {
             $warnings[] = [
-                'level'   => $options & self::REPAIR ? 1 : 3,
-                'message' => 'The propertyname: ' . $this->name . ' contains invalid characters. Only A-Z, 0-9 and - are allowed',
-                'node'    => $this,
+                'level' => $options & self::REPAIR ? 1 : 3,
+                'message' => 'The propertyname: '.$this->name.' contains invalid characters. Only A-Z, 0-9 and - are allowed',
+                'node' => $this,
             ];
             if ($options & self::REPAIR) {
                 // Uppercasing and converting underscores to dashes.
@@ -589,46 +548,52 @@ abstract class Property extends Node {
                 );
                 // Removing every other invalid character
                 $this->name = preg_replace('/([^A-Z0-9-])/u', '', $this->name);
-
             }
-
         }
 
         if ($encoding = $this->offsetGet('ENCODING')) {
-
-            if ($this->root->getDocumentType() === Document::VCARD40) {
+            if (Document::VCARD40 === $this->root->getDocumentType()) {
                 $warnings[] = [
-                    'level'   => 3,
+                    'level' => 3,
                     'message' => 'ENCODING parameter is not valid in vCard 4.',
-                    'node'    => $this
+                    'node' => $this,
                 ];
             } else {
-
-                $encoding = (string)$encoding;
+                $encoding = (string) $encoding;
 
                 $allowedEncoding = [];
 
                 switch ($this->root->getDocumentType()) {
-                    case Document::ICALENDAR20 :
+                    case Document::ICALENDAR20:
                         $allowedEncoding = ['8BIT', 'BASE64'];
                         break;
-                    case Document::VCARD21 :
+                    case Document::VCARD21:
                         $allowedEncoding = ['QUOTED-PRINTABLE', 'BASE64', '8BIT'];
                         break;
-                    case Document::VCARD30 :
+                    case Document::VCARD30:
                         $allowedEncoding = ['B'];
+                        //Repair vCard30 that use BASE64 encoding
+                        if ($options & self::REPAIR) {
+                            if ('BASE64' === strtoupper($encoding)) {
+                                $encoding = 'B';
+                                $this['ENCODING'] = $encoding;
+                                $warnings[] = [
+                                    'level' => 1,
+                                    'message' => 'ENCODING=BASE64 has been transformed to ENCODING=B.',
+                                    'node' => $this,
+                                ];
+                            }
+                        }
                         break;
-
                 }
                 if ($allowedEncoding && !in_array(strtoupper($encoding), $allowedEncoding)) {
                     $warnings[] = [
-                        'level'   => 3,
-                        'message' => 'ENCODING=' . strtoupper($encoding) . ' is not valid for this document type.',
-                        'node'    => $this
+                        'level' => 3,
+                        'message' => 'ENCODING='.strtoupper($encoding).' is not valid for this document type.',
+                        'node' => $this,
                     ];
                 }
             }
-
         }
 
         // Validating inner parameters
@@ -637,7 +602,6 @@ abstract class Property extends Node {
         }
 
         return $warnings;
-
     }
 
     /**
@@ -645,17 +609,13 @@ abstract class Property extends Node {
      *
      * It's intended to remove all circular references, so PHP can easily clean
      * it up.
-     *
-     * @return void
      */
-    function destroy() {
-
+    public function destroy()
+    {
         parent::destroy();
         foreach ($this->parameters as $param) {
             $param->destroy();
         }
         $this->parameters = [];
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/Binary.php b/vendor/sabre/vobject/lib/Property/Binary.php
index d54cae25d..830dd9028 100644
--- a/vendor/sabre/vobject/lib/Property/Binary.php
+++ b/vendor/sabre/vobject/lib/Property/Binary.php
@@ -18,8 +18,8 @@ use Sabre\VObject\Property;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Binary extends Property {
-
+class Binary extends Property
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -34,25 +34,18 @@ class Binary extends Property {
      * This may be either a single, or multiple strings in an array.
      *
      * @param string|array $value
-     *
-     * @return void
      */
-    function setValue($value) {
-
+    public function setValue($value)
+    {
         if (is_array($value)) {
-
-            if (count($value) === 1) {
+            if (1 === count($value)) {
                 $this->value = $value[0];
             } else {
                 throw new \InvalidArgumentException('The argument must either be a string or an array with only one child');
             }
-
         } else {
-
             $this->value = $value;
-
         }
-
     }
 
     /**
@@ -62,13 +55,10 @@ class Binary extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->value = base64_decode($val);
-
     }
 
     /**
@@ -76,10 +66,9 @@ class Binary extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return base64_encode($this->value);
-
     }
 
     /**
@@ -90,10 +79,9 @@ class Binary extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'BINARY';
-
     }
 
     /**
@@ -103,10 +91,9 @@ class Binary extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         return [base64_encode($this->getValue())];
-
     }
 
     /**
@@ -115,14 +102,10 @@ class Binary extends Property {
      * The value must always be an array.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setJsonValue(array $value) {
-
+    public function setJsonValue(array $value)
+    {
         $value = array_map('base64_decode', $value);
         parent::setJsonValue($value);
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/Boolean.php b/vendor/sabre/vobject/lib/Property/Boolean.php
index 6f5887e25..1b219bb8c 100644
--- a/vendor/sabre/vobject/lib/Property/Boolean.php
+++ b/vendor/sabre/vobject/lib/Property/Boolean.php
@@ -17,8 +17,8 @@ use
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Boolean extends Property {
-
+class Boolean extends Property
+{
     /**
      * Sets a raw value coming from a mimedir (iCalendar/vCard) file.
      *
@@ -26,14 +26,11 @@ class Boolean extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
-        $val = strtoupper($val) === 'TRUE' ? true : false;
+    public function setRawMimeDirValue($val)
+    {
+        $val = 'TRUE' === strtoupper($val) ? true : false;
         $this->setValue($val);
-
     }
 
     /**
@@ -41,10 +38,9 @@ class Boolean extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return $this->value ? 'TRUE' : 'FALSE';
-
     }
 
     /**
@@ -55,10 +51,9 @@ class Boolean extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'BOOLEAN';
-
     }
 
     /**
@@ -66,19 +61,15 @@ class Boolean extends Property {
      * object.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setXmlValue(array $value) {
-
+    public function setXmlValue(array $value)
+    {
         $value = array_map(
-            function($value) {
+            function ($value) {
                 return 'true' === $value;
             },
             $value
         );
         parent::setXmlValue($value);
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/FlatText.php b/vendor/sabre/vobject/lib/Property/FlatText.php
index 2c7b43c29..d15cfe051 100644
--- a/vendor/sabre/vobject/lib/Property/FlatText.php
+++ b/vendor/sabre/vobject/lib/Property/FlatText.php
@@ -22,8 +22,8 @@ namespace Sabre\VObject\Property;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class FlatText extends Text {
-
+class FlatText extends Text
+{
     /**
      * Field separator.
      *
@@ -37,14 +37,10 @@ class FlatText extends Text {
      * Overriding this so we're not splitting on a ; delimiter.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setQuotedPrintableValue($val) {
-
+    public function setQuotedPrintableValue($val)
+    {
         $val = quoted_printable_decode($val);
         $this->setValue($val);
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/FloatValue.php b/vendor/sabre/vobject/lib/Property/FloatValue.php
index 15b119549..208d74516 100644
--- a/vendor/sabre/vobject/lib/Property/FloatValue.php
+++ b/vendor/sabre/vobject/lib/Property/FloatValue.php
@@ -15,8 +15,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class FloatValue extends Property {
-
+class FloatValue extends Property
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -32,17 +32,14 @@ class FloatValue extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $val = explode($this->delimiter, $val);
         foreach ($val as &$item) {
-            $item = (float)$item;
+            $item = (float) $item;
         }
         $this->setParts($val);
-
     }
 
     /**
@@ -50,13 +47,12 @@ class FloatValue extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return implode(
             $this->delimiter,
             $this->getParts()
         );
-
     }
 
     /**
@@ -67,10 +63,9 @@ class FloatValue extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'FLOAT';
-
     }
 
     /**
@@ -80,20 +75,19 @@ class FloatValue extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         $val = array_map('floatval', $this->getParts());
 
         // Special-casing the GEO property.
         //
         // See:
         // http://tools.ietf.org/html/draft-ietf-jcardcal-jcal-04#section-3.4.1.2
-        if ($this->name === 'GEO') {
+        if ('GEO' === $this->name) {
             return [$val];
         }
 
         return $val;
-
     }
 
     /**
@@ -101,42 +95,32 @@ class FloatValue extends Property {
      * object.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setXmlValue(array $value) {
-
+    public function setXmlValue(array $value)
+    {
         $value = array_map('floatval', $value);
         parent::setXmlValue($value);
-
     }
 
     /**
      * This method serializes only the value of a property. This is used to
      * create xCard or xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    protected function xmlSerializeValue(Xml\Writer $writer) {
-
+    protected function xmlSerializeValue(Xml\Writer $writer)
+    {
         // Special-casing the GEO property.
         //
         // See:
         // http://tools.ietf.org/html/rfc6321#section-3.4.1.2
-        if ($this->name === 'GEO') {
-
+        if ('GEO' === $this->name) {
             $value = array_map('floatval', $this->getParts());
 
             $writer->writeElement('latitude', $value[0]);
             $writer->writeElement('longitude', $value[1]);
-
-        }
-        else {
+        } else {
             parent::xmlSerializeValue($writer);
         }
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/ICalendar/CalAddress.php b/vendor/sabre/vobject/lib/Property/ICalendar/CalAddress.php
index a0c4a9b9a..e89bb31f9 100644
--- a/vendor/sabre/vobject/lib/Property/ICalendar/CalAddress.php
+++ b/vendor/sabre/vobject/lib/Property/ICalendar/CalAddress.php
@@ -14,8 +14,8 @@ use
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalAddress extends Text {
-
+class CalAddress extends Text
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -32,10 +32,9 @@ class CalAddress extends Text {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'CAL-ADDRESS';
-
     }
 
     /**
@@ -48,14 +47,14 @@ class CalAddress extends Text {
      *
      * @return string
      */
-    function getNormalizedValue() {
-
+    public function getNormalizedValue()
+    {
         $input = $this->getValue();
         if (!strpos($input, ':')) {
             return $input;
         }
         list($schema, $everythingElse) = explode(':', $input, 2);
-        return strtolower($schema) . ':' . $everythingElse;
 
+        return strtolower($schema).':'.$everythingElse;
     }
 }
diff --git a/vendor/sabre/vobject/lib/Property/ICalendar/Date.php b/vendor/sabre/vobject/lib/Property/ICalendar/Date.php
index 378a0d60a..d8e86d13e 100644
--- a/vendor/sabre/vobject/lib/Property/ICalendar/Date.php
+++ b/vendor/sabre/vobject/lib/Property/ICalendar/Date.php
@@ -13,6 +13,6 @@ namespace Sabre\VObject\Property\ICalendar;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Date extends DateTime {
-
+class Date extends DateTime
+{
 }
diff --git a/vendor/sabre/vobject/lib/Property/ICalendar/DateTime.php b/vendor/sabre/vobject/lib/Property/ICalendar/DateTime.php
index d580d4f68..7eb3e0bb7 100644
--- a/vendor/sabre/vobject/lib/Property/ICalendar/DateTime.php
+++ b/vendor/sabre/vobject/lib/Property/ICalendar/DateTime.php
@@ -24,8 +24,8 @@ use Sabre\VObject\TimeZoneUtil;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class DateTime extends Property {
-
+class DateTime extends Property
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -40,17 +40,14 @@ class DateTime extends Property {
      * You may also specify DateTime objects here.
      *
      * @param array $parts
-     *
-     * @return void
      */
-    function setParts(array $parts) {
-
+    public function setParts(array $parts)
+    {
         if (isset($parts[0]) && $parts[0] instanceof DateTimeInterface) {
             $this->setDateTimes($parts);
         } else {
             parent::setParts($parts);
         }
-
     }
 
     /**
@@ -61,11 +58,9 @@ class DateTime extends Property {
      * Instead of strings, you may also use DateTime here.
      *
      * @param string|array|DateTimeInterface $value
-     *
-     * @return void
      */
-    function setValue($value) {
-
+    public function setValue($value)
+    {
         if (is_array($value) && isset($value[0]) && $value[0] instanceof DateTimeInterface) {
             $this->setDateTimes($value);
         } elseif ($value instanceof DateTimeInterface) {
@@ -73,7 +68,6 @@ class DateTime extends Property {
         } else {
             parent::setValue($value);
         }
-
     }
 
     /**
@@ -83,13 +77,10 @@ class DateTime extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->setValue(explode($this->delimiter, $val));
-
     }
 
     /**
@@ -97,10 +88,9 @@ class DateTime extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return implode($this->delimiter, $this->getParts());
-
     }
 
     /**
@@ -108,10 +98,9 @@ class DateTime extends Property {
      *
      * @return bool
      */
-    function hasTime() {
-
-        return strtoupper((string)$this['VALUE']) !== 'DATE';
-
+    public function hasTime()
+    {
+        return 'DATE' !== strtoupper((string) $this['VALUE']);
     }
 
     /**
@@ -119,15 +108,14 @@ class DateTime extends Property {
      *
      * Note that DATE is always floating.
      */
-    function isFloating() {
-
+    public function isFloating()
+    {
         return
             !$this->hasTime() ||
             (
                 !isset($this['TZID']) &&
-                strpos($this->getValue(), 'Z') === false
+                false === strpos($this->getValue(), 'Z')
             );
-
     }
 
     /**
@@ -143,15 +131,16 @@ class DateTime extends Property {
      *
      * @param DateTimeZone $timeZone
      *
-     * @return DateTimeImmutable
+     * @return \DateTimeImmutable
      */
-    function getDateTime(DateTimeZone $timeZone = null) {
-
+    public function getDateTime(DateTimeZone $timeZone = null)
+    {
         $dt = $this->getDateTimes($timeZone);
-        if (!$dt) return;
+        if (!$dt) {
+            return;
+        }
 
         return $dt[0];
-
     }
 
     /**
@@ -163,38 +152,35 @@ class DateTime extends Property {
      *
      * @param DateTimeZone $timeZone
      *
-     * @return DateTimeImmutable[]
+     * @return \DateTimeImmutable[]
      * @return \DateTime[]
      */
-    function getDateTimes(DateTimeZone $timeZone = null) {
-
+    public function getDateTimes(DateTimeZone $timeZone = null)
+    {
         // Does the property have a TZID?
         $tzid = $this['TZID'];
 
         if ($tzid) {
-            $timeZone = TimeZoneUtil::getTimeZone((string)$tzid, $this->root);
+            $timeZone = TimeZoneUtil::getTimeZone((string) $tzid, $this->root);
         }
 
         $dts = [];
         foreach ($this->getParts() as $part) {
             $dts[] = DateTimeParser::parse($part, $timeZone);
         }
-        return $dts;
 
+        return $dts;
     }
 
     /**
      * Sets the property as a DateTime object.
      *
      * @param DateTimeInterface $dt
-     * @param bool isFloating If set to true, timezones will be ignored.
-     *
-     * @return void
+     * @param bool isFloating If set to true, timezones will be ignored
      */
-    function setDateTime(DateTimeInterface $dt, $isFloating = false) {
-
+    public function setDateTime(DateTimeInterface $dt, $isFloating = false)
+    {
         $this->setDateTimes([$dt], $isFloating);
-
     }
 
     /**
@@ -204,21 +190,17 @@ class DateTime extends Property {
      * the otehr values will be adjusted for that timezone
      *
      * @param DateTimeInterface[] $dt
-     * @param bool isFloating If set to true, timezones will be ignored.
-     *
-     * @return void
+     * @param bool isFloating If set to true, timezones will be ignored
      */
-    function setDateTimes(array $dt, $isFloating = false) {
-
+    public function setDateTimes(array $dt, $isFloating = false)
+    {
         $values = [];
 
         if ($this->hasTime()) {
-
             $tz = null;
             $isUtc = false;
 
             foreach ($dt as $d) {
-
                 if ($isFloating) {
                     $values[] = $d->format('Ymd\\THis');
                     continue;
@@ -238,25 +220,18 @@ class DateTime extends Property {
                 } else {
                     $values[] = $d->format('Ymd\\THis');
                 }
-
             }
             if ($isUtc || $isFloating) {
                 $this->offsetUnset('TZID');
             }
-
         } else {
-
             foreach ($dt as $d) {
-
                 $values[] = $d->format('Ymd');
-
             }
             $this->offsetUnset('TZID');
-
         }
 
         $this->value = $values;
-
     }
 
     /**
@@ -267,10 +242,9 @@ class DateTime extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return $this->hasTime() ? 'DATE-TIME' : 'DATE';
-
     }
 
     /**
@@ -280,8 +254,8 @@ class DateTime extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         $dts = $this->getDateTimes();
         $hasTime = $this->hasTime();
         $isFloating = $this->isFloating();
@@ -290,18 +264,15 @@ class DateTime extends Property {
         $isUtc = $isFloating ? false : in_array($tz->getName(), ['UTC', 'GMT', 'Z']);
 
         return array_map(
-            function(DateTimeInterface $dt) use ($hasTime, $isUtc) {
-
+            function (DateTimeInterface $dt) use ($hasTime, $isUtc) {
                 if ($hasTime) {
-                    return $dt->format('Y-m-d\\TH:i:s') . ($isUtc ? 'Z' : '');
+                    return $dt->format('Y-m-d\\TH:i:s').($isUtc ? 'Z' : '');
                 } else {
                     return $dt->format('Y-m-d');
                 }
-
             },
             $dts
         );
-
     }
 
     /**
@@ -310,26 +281,21 @@ class DateTime extends Property {
      * The value must always be an array.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setJsonValue(array $value) {
-
+    public function setJsonValue(array $value)
+    {
         // dates and times in jCal have one difference to dates and times in
         // iCalendar. In jCal date-parts are separated by dashes, and
         // time-parts are separated by colons. It makes sense to just remove
         // those.
         $this->setValue(
             array_map(
-                function($item) {
-
+                function ($item) {
                     return strtr($item, [':' => '', '-' => '']);
-
                 },
                 $value
             )
         );
-
     }
 
     /**
@@ -337,20 +303,17 @@ class DateTime extends Property {
      * VALUE from DATE-TIME to DATE or vice-versa.
      *
      * @param string $name
-     * @param mixed $value
-     *
-     * @return void
+     * @param mixed  $value
      */
-    function offsetSet($name, $value) {
-
+    public function offsetSet($name, $value)
+    {
         parent::offsetSet($name, $value);
-        if (strtoupper($name) !== 'VALUE') {
+        if ('VALUE' !== strtoupper($name)) {
             return;
         }
 
         // This will ensure that dates are correctly encoded.
         $this->setDateTimes($this->getDateTimes());
-
     }
 
     /**
@@ -375,30 +338,30 @@ class DateTime extends Property {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $messages = parent::validate($options);
         $valueType = $this->getValueType();
         $values = $this->getParts();
         try {
             foreach ($values as $value) {
                 switch ($valueType) {
-                    case 'DATE' :
+                    case 'DATE':
                         DateTimeParser::parseDate($value);
                         break;
-                    case 'DATE-TIME' :
+                    case 'DATE-TIME':
                         DateTimeParser::parseDateTime($value);
                         break;
                 }
             }
         } catch (InvalidDataException $e) {
             $messages[] = [
-                'level'   => 3,
-                'message' => 'The supplied value (' . $value . ') is not a correct ' . $valueType,
-                'node'    => $this,
+                'level' => 3,
+                'message' => 'The supplied value ('.$value.') is not a correct '.$valueType,
+                'node' => $this,
             ];
         }
-        return $messages;
 
+        return $messages;
     }
 }
diff --git a/vendor/sabre/vobject/lib/Property/ICalendar/Duration.php b/vendor/sabre/vobject/lib/Property/ICalendar/Duration.php
index 7b7e1ce8e..87f008160 100644
--- a/vendor/sabre/vobject/lib/Property/ICalendar/Duration.php
+++ b/vendor/sabre/vobject/lib/Property/ICalendar/Duration.php
@@ -16,8 +16,8 @@ use Sabre\VObject\Property;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Duration extends Property {
-
+class Duration extends Property
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -33,13 +33,10 @@ class Duration extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->setValue(explode($this->delimiter, $val));
-
     }
 
     /**
@@ -47,10 +44,9 @@ class Duration extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return implode($this->delimiter, $this->getParts());
-
     }
 
     /**
@@ -61,10 +57,9 @@ class Duration extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'DURATION';
-
     }
 
     /**
@@ -74,12 +69,11 @@ class Duration extends Property {
      *
      * @return \DateInterval
      */
-    function getDateInterval() {
-
+    public function getDateInterval()
+    {
         $parts = $this->getParts();
         $value = $parts[0];
-        return DateTimeParser::parseDuration($value);
 
+        return DateTimeParser::parseDuration($value);
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/ICalendar/Period.php b/vendor/sabre/vobject/lib/Property/ICalendar/Period.php
index d35b425aa..17bfa5c5c 100644
--- a/vendor/sabre/vobject/lib/Property/ICalendar/Period.php
+++ b/vendor/sabre/vobject/lib/Property/ICalendar/Period.php
@@ -17,8 +17,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Period extends Property {
-
+class Period extends Property
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -34,13 +34,10 @@ class Period extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->setValue(explode($this->delimiter, $val));
-
     }
 
     /**
@@ -48,10 +45,9 @@ class Period extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return implode($this->delimiter, $this->getParts());
-
     }
 
     /**
@@ -62,10 +58,9 @@ class Period extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'PERIOD';
-
     }
 
     /**
@@ -74,21 +69,16 @@ class Period extends Property {
      * The value must always be an array.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setJsonValue(array $value) {
-
+    public function setJsonValue(array $value)
+    {
         $value = array_map(
-            function($item) {
-
+            function ($item) {
                 return strtr(implode('/', $item), [':' => '', '-' => '']);
-
             },
             $value
         );
         parent::setJsonValue($value);
-
     }
 
     /**
@@ -98,20 +88,19 @@ class Period extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         $return = [];
         foreach ($this->getParts() as $item) {
-
             list($start, $end) = explode('/', $item, 2);
 
             $start = DateTimeParser::parseDateTime($start);
 
             // This is a duration value.
-            if ($end[0] === 'P') {
+            if ('P' === $end[0]) {
                 $return[] = [
                     $start->format('Y-m-d\\TH:i:s'),
-                    $end
+                    $end,
                 ];
             } else {
                 $end = DateTimeParser::parseDateTime($end);
@@ -120,36 +109,29 @@ class Period extends Property {
                     $end->format('Y-m-d\\TH:i:s'),
                 ];
             }
-
         }
 
         return $return;
-
     }
 
     /**
      * This method serializes only the value of a property. This is used to
      * create xCard or xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    protected function xmlSerializeValue(Xml\Writer $writer) {
-
+    protected function xmlSerializeValue(Xml\Writer $writer)
+    {
         $writer->startElement(strtolower($this->getValueType()));
         $value = $this->getJsonValue();
         $writer->writeElement('start', $value[0][0]);
 
-        if ($value[0][1][0] === 'P') {
+        if ('P' === $value[0][1][0]) {
             $writer->writeElement('duration', $value[0][1]);
-        }
-        else {
+        } else {
             $writer->writeElement('end', $value[0][1]);
         }
 
         $writer->endElement();
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/ICalendar/Recur.php b/vendor/sabre/vobject/lib/Property/ICalendar/Recur.php
index 434b77088..baeda781e 100644
--- a/vendor/sabre/vobject/lib/Property/ICalendar/Recur.php
+++ b/vendor/sabre/vobject/lib/Property/ICalendar/Recur.php
@@ -22,36 +22,33 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Recur extends Property {
-
+class Recur extends Property
+{
     /**
      * Updates the current value.
      *
      * This may be either a single, or multiple strings in an array.
      *
      * @param string|array $value
-     *
-     * @return void
      */
-    function setValue($value) {
-
+    public function setValue($value)
+    {
         // If we're getting the data from json, we'll be receiving an object
         if ($value instanceof \StdClass) {
-            $value = (array)$value;
+            $value = (array) $value;
         }
 
         if (is_array($value)) {
             $newVal = [];
             foreach ($value as $k => $v) {
-
                 if (is_string($v)) {
                     $v = strtoupper($v);
 
                     // The value had multiple sub-values
-                    if (strpos($v, ',') !== false) {
+                    if (false !== strpos($v, ',')) {
                         $v = explode(',', $v);
                     }
-                    if (strcmp($k, 'until') === 0) {
+                    if (0 === strcmp($k, 'until')) {
                         $v = strtr($v, [':' => '', '-' => '']);
                     }
                 } elseif (is_array($v)) {
@@ -66,7 +63,6 @@ class Recur extends Property {
         } else {
             throw new \InvalidArgumentException('You must either pass a string, or a key=>value array');
         }
-
     }
 
     /**
@@ -80,26 +76,24 @@ class Recur extends Property {
      *
      * @return string
      */
-    function getValue() {
-
+    public function getValue()
+    {
         $out = [];
         foreach ($this->value as $key => $value) {
-            $out[] = $key . '=' . (is_array($value) ? implode(',', $value) : $value);
+            $out[] = $key.'='.(is_array($value) ? implode(',', $value) : $value);
         }
-        return strtoupper(implode(';', $out));
 
+        return strtoupper(implode(';', $out));
     }
 
     /**
      * Sets a multi-valued property.
      *
      * @param array $parts
-     * @return void
      */
-    function setParts(array $parts) {
-
+    public function setParts(array $parts)
+    {
         $this->setValue($parts);
-
     }
 
     /**
@@ -110,10 +104,9 @@ class Recur extends Property {
      *
      * @return array
      */
-    function getParts() {
-
+    public function getParts()
+    {
         return $this->value;
-
     }
 
     /**
@@ -123,13 +116,10 @@ class Recur extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->setValue($val);
-
     }
 
     /**
@@ -137,10 +127,9 @@ class Recur extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return $this->getValue();
-
     }
 
     /**
@@ -151,10 +140,9 @@ class Recur extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'RECUR';
-
     }
 
     /**
@@ -164,39 +152,36 @@ class Recur extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         $values = [];
         foreach ($this->getParts() as $k => $v) {
-            if (strcmp($k, 'UNTIL') === 0) {
+            if (0 === strcmp($k, 'UNTIL')) {
                 $date = new DateTime($this->root, null, $v);
                 $values[strtolower($k)] = $date->getJsonValue()[0];
-            } elseif (strcmp($k, 'COUNT') === 0) {
+            } elseif (0 === strcmp($k, 'COUNT')) {
                 $values[strtolower($k)] = intval($v);
             } else {
                 $values[strtolower($k)] = $v;
             }
         }
-        return [$values];
 
+        return [$values];
     }
 
     /**
      * This method serializes only the value of a property. This is used to
      * create xCard or xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    protected function xmlSerializeValue(Xml\Writer $writer) {
-
+    protected function xmlSerializeValue(Xml\Writer $writer)
+    {
         $valueType = strtolower($this->getValueType());
 
         foreach ($this->getJsonValue() as $value) {
             $writer->writeElement($valueType, $value);
         }
-
     }
 
     /**
@@ -206,12 +191,11 @@ class Recur extends Property {
      *
      * @return array
      */
-    static function stringToArray($value) {
-
+    public static function stringToArray($value)
+    {
         $value = strtoupper($value);
         $newValue = [];
         foreach (explode(';', $value) as $part) {
-
             // Skipping empty parts.
             if (empty($part)) {
                 continue;
@@ -219,11 +203,10 @@ class Recur extends Property {
             list($partName, $partValue) = explode('=', $part);
 
             // The value itself had multiple values..
-            if (strpos($partValue, ',') !== false) {
+            if (false !== strpos($partValue, ',')) {
                 $partValue = explode(',', $partValue);
             }
             $newValue[$partName] = $partValue;
-
         }
 
         return $newValue;
@@ -251,32 +234,31 @@ class Recur extends Property {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $repair = ($options & self::REPAIR);
 
         $warnings = parent::validate($options);
         $values = $this->getParts();
 
         foreach ($values as $key => $value) {
-
-            if ($value === '') {
+            if ('' === $value) {
                 $warnings[] = [
-                    'level'   => $repair ? 1 : 3,
-                    'message' => 'Invalid value for ' . $key . ' in ' . $this->name,
-                    'node'    => $this
+                    'level' => $repair ? 1 : 3,
+                    'message' => 'Invalid value for '.$key.' in '.$this->name,
+                    'node' => $this,
                 ];
                 if ($repair) {
                     unset($values[$key]);
                 }
-            } elseif ($key == 'BYMONTH') {
-                $byMonth = (array)$value;
+            } elseif ('BYMONTH' == $key) {
+                $byMonth = (array) $value;
                 foreach ($byMonth as $i => $v) {
-                    if (!is_numeric($v) || (int)$v < 1 || (int)$v > 12) {
+                    if (!is_numeric($v) || (int) $v < 1 || (int) $v > 12) {
                         $warnings[] = [
-                            'level'   => $repair ? 1 : 3,
+                            'level' => $repair ? 1 : 3,
                             'message' => 'BYMONTH in RRULE must have value(s) between 1 and 12!',
-                            'node'    => $this
+                            'node' => $this,
                         ];
                         if ($repair) {
                             if (is_array($value)) {
@@ -291,14 +273,14 @@ class Recur extends Property {
                 if (is_array($value) && empty($values[$key])) {
                     unset($values[$key]);
                 }
-            } elseif ($key == 'BYWEEKNO') {
-                $byWeekNo = (array)$value;
+            } elseif ('BYWEEKNO' == $key) {
+                $byWeekNo = (array) $value;
                 foreach ($byWeekNo as $i => $v) {
-                    if (!is_numeric($v) || (int)$v < -53 || (int)$v == 0 || (int)$v > 53) {
+                    if (!is_numeric($v) || (int) $v < -53 || 0 == (int) $v || (int) $v > 53) {
                         $warnings[] = [
-                            'level'   => $repair ? 1 : 3,
+                            'level' => $repair ? 1 : 3,
                             'message' => 'BYWEEKNO in RRULE must have value(s) from -53 to -1, or 1 to 53!',
-                            'node'    => $this
+                            'node' => $this,
                         ];
                         if ($repair) {
                             if (is_array($value)) {
@@ -313,14 +295,14 @@ class Recur extends Property {
                 if (is_array($value) && empty($values[$key])) {
                     unset($values[$key]);
                 }
-            } elseif ($key == 'BYYEARDAY') {
-                $byYearDay = (array)$value;
+            } elseif ('BYYEARDAY' == $key) {
+                $byYearDay = (array) $value;
                 foreach ($byYearDay as $i => $v) {
-                    if (!is_numeric($v) || (int)$v < -366 || (int)$v == 0 || (int)$v > 366) {
+                    if (!is_numeric($v) || (int) $v < -366 || 0 == (int) $v || (int) $v > 366) {
                         $warnings[] = [
-                            'level'   => $repair ? 1 : 3,
+                            'level' => $repair ? 1 : 3,
                             'message' => 'BYYEARDAY in RRULE must have value(s) from -366 to -1, or 1 to 366!',
-                            'node'    => $this
+                            'node' => $this,
                         ];
                         if ($repair) {
                             if (is_array($value)) {
@@ -336,13 +318,12 @@ class Recur extends Property {
                     unset($values[$key]);
                 }
             }
-
         }
         if (!isset($values['FREQ'])) {
             $warnings[] = [
-                'level'   => $repair ? 1 : 3,
-                'message' => 'FREQ is required in ' . $this->name,
-                'node'    => $this
+                'level' => $repair ? 1 : 3,
+                'message' => 'FREQ is required in '.$this->name,
+                'node' => $this,
             ];
             if ($repair) {
                 $this->parent->remove($this);
@@ -353,7 +334,5 @@ class Recur extends Property {
         }
 
         return $warnings;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/IntegerValue.php b/vendor/sabre/vobject/lib/Property/IntegerValue.php
index 5bd1887fa..ddd71d731 100644
--- a/vendor/sabre/vobject/lib/Property/IntegerValue.php
+++ b/vendor/sabre/vobject/lib/Property/IntegerValue.php
@@ -15,8 +15,8 @@ use
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class IntegerValue extends Property {
-
+class IntegerValue extends Property
+{
     /**
      * Sets a raw value coming from a mimedir (iCalendar/vCard) file.
      *
@@ -24,13 +24,10 @@ class IntegerValue extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
-        $this->setValue((int)$val);
-
+    public function setRawMimeDirValue($val)
+    {
+        $this->setValue((int) $val);
     }
 
     /**
@@ -38,10 +35,9 @@ class IntegerValue extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return $this->value;
-
     }
 
     /**
@@ -52,10 +48,9 @@ class IntegerValue extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'INTEGER';
-
     }
 
     /**
@@ -65,10 +60,9 @@ class IntegerValue extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
-        return [(int)$this->getValue()];
-
+    public function getJsonValue()
+    {
+        return [(int) $this->getValue()];
     }
 
     /**
@@ -76,13 +70,10 @@ class IntegerValue extends Property {
      * object.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setXmlValue(array $value) {
-
+    public function setXmlValue(array $value)
+    {
         $value = array_map('intval', $value);
         parent::setXmlValue($value);
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Property/Text.php b/vendor/sabre/vobject/lib/Property/Text.php
index 47a86ccc9..23c945551 100644
--- a/vendor/sabre/vobject/lib/Property/Text.php
+++ b/vendor/sabre/vobject/lib/Property/Text.php
@@ -17,8 +17,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Text extends Property {
-
+class Text extends Property
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -53,7 +53,7 @@ class Text extends Property {
      * @var array
      */
     protected $minimumPropertyValues = [
-        'N'   => 5,
+        'N' => 5,
         'ADR' => 7,
     ];
 
@@ -64,16 +64,14 @@ class Text extends Property {
      * parameters will automatically be created, or you can just pass a list of
      * Parameter objects.
      *
-     * @param Component $root The root document
-     * @param string $name
+     * @param Component         $root       The root document
+     * @param string            $name
      * @param string|array|null $value
-     * @param array $parameters List of parameters
-     * @param string $group The vcard property group
-     *
-     * @return void
+     * @param array             $parameters List of parameters
+     * @param string            $group      The vcard property group
      */
-    function __construct(Component $root, $name, $value = null, array $parameters = [], $group = null) {
-
+    public function __construct(Component $root, $name, $value = null, array $parameters = [], $group = null)
+    {
         // There's two types of multi-valued text properties:
         // 1. multivalue properties.
         // 2. structured value properties
@@ -84,7 +82,6 @@ class Text extends Property {
         }
 
         parent::__construct($root, $name, $value, $parameters, $group);
-
     }
 
     /**
@@ -94,24 +91,19 @@ class Text extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->setValue(MimeDir::unescapeValue($val, $this->delimiter));
-
     }
 
     /**
      * Sets the value as a quoted-printable encoded string.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setQuotedPrintableValue($val) {
-
+    public function setQuotedPrintableValue($val)
+    {
         $val = quoted_printable_decode($val);
 
         // Quoted printable only appears in vCard 2.1, and the only character
@@ -123,7 +115,6 @@ class Text extends Property {
         $regex = '# (?<!\\\\) ; #x';
         $matches = preg_split($regex, $val);
         $this->setValue($matches);
-
     }
 
     /**
@@ -131,8 +122,8 @@ class Text extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         $val = $this->getParts();
 
         if (isset($this->minimumPropertyValues[$this->name])) {
@@ -140,7 +131,6 @@ class Text extends Property {
         }
 
         foreach ($val as &$item) {
-
             if (!is_array($item)) {
                 $item = [$item];
             }
@@ -150,19 +140,17 @@ class Text extends Property {
                     $subItem,
                     [
                         '\\' => '\\\\',
-                        ';'  => '\;',
-                        ','  => '\,',
+                        ';' => '\;',
+                        ',' => '\,',
                         "\n" => '\n',
-                        "\r" => "",
+                        "\r" => '',
                     ]
                 );
             }
             $item = implode(',', $item);
-
         }
 
         return implode($this->delimiter, $val);
-
     }
 
     /**
@@ -172,16 +160,16 @@ class Text extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         // Structured text values should always be returned as a single
         // array-item. Multi-value text should be returned as multiple items in
         // the top-array.
         if (in_array($this->name, $this->structuredValues)) {
             return [$this->getParts()];
         }
-        return $this->getParts();
 
+        return $this->getParts();
     }
 
     /**
@@ -192,10 +180,9 @@ class Text extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'TEXT';
-
     }
 
     /**
@@ -203,10 +190,10 @@ class Text extends Property {
      *
      * @return string
      */
-    function serialize() {
-
+    public function serialize()
+    {
         // We need to kick in a special type of encoding, if it's a 2.1 vcard.
-        if ($this->root->getDocumentType() !== Document::VCARD21) {
+        if (Document::VCARD21 !== $this->root->getDocumentType()) {
             return parent::serialize();
         }
 
@@ -228,22 +215,19 @@ class Text extends Property {
         }
 
         $str = $this->name;
-        if ($this->group) $str = $this->group . '.' . $this->name;
+        if ($this->group) {
+            $str = $this->group.'.'.$this->name;
+        }
         foreach ($this->parameters as $param) {
-
-            if ($param->getValue() === 'QUOTED-PRINTABLE') {
+            if ('QUOTED-PRINTABLE' === $param->getValue()) {
                 continue;
             }
-            $str .= ';' . $param->serialize();
-
+            $str .= ';'.$param->serialize();
         }
 
-
-
         // If the resulting value contains a \n, we must encode it as
         // quoted-printable.
-        if (\strpos($val, "\n") !== false) {
-
+        if (false !== \strpos($val, "\n")) {
             $str .= ';ENCODING=QUOTED-PRINTABLE:';
             $lastLine = $str;
             $out = null;
@@ -252,26 +236,27 @@ class Text extends Property {
             // encode newlines for us. Specifically, the \r\n sequence must in
             // vcards be encoded as =0D=OA and we must insert soft-newlines
             // every 75 bytes.
-            for ($ii = 0;$ii < \strlen($val);$ii++) {
+            for ($ii = 0; $ii < \strlen($val); ++$ii) {
                 $ord = \ord($val[$ii]);
                 // These characters are encoded as themselves.
                 if ($ord >= 32 && $ord <= 126) {
                     $lastLine .= $val[$ii];
                 } else {
-                    $lastLine .= '=' . \strtoupper(\bin2hex($val[$ii]));
+                    $lastLine .= '='.\strtoupper(\bin2hex($val[$ii]));
                 }
                 if (\strlen($lastLine) >= 75) {
                     // Soft line break
-                    $out .= $lastLine . "=\r\n ";
+                    $out .= $lastLine."=\r\n ";
                     $lastLine = null;
                 }
-
             }
-            if (!\is_null($lastLine)) $out .= $lastLine . "\r\n";
-            return $out;
+            if (!\is_null($lastLine)) {
+                $out .= $lastLine."\r\n";
+            }
 
+            return $out;
         } else {
-            $str .= ':' . $val;
+            $str .= ':'.$val;
 
             $str = \preg_replace(
                 '/(
@@ -285,24 +270,20 @@ class Text extends Property {
 
             // remove single space after last CRLF
             return \substr($str, 0, -1);
-
         }
-
     }
 
     /**
      * This method serializes only the value of a property. This is used to
      * create xCard or xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    protected function xmlSerializeValue(Xml\Writer $writer) {
-
+    protected function xmlSerializeValue(Xml\Writer $writer)
+    {
         $values = $this->getParts();
 
-        $map = function($items) use ($values, $writer) {
+        $map = function ($items) use ($values, $writer) {
             foreach ($items as $i => $item) {
                 $writer->writeElement(
                     $item,
@@ -312,7 +293,6 @@ class Text extends Property {
         };
 
         switch ($this->name) {
-
             // Special-casing the REQUEST-STATUS property.
             //
             // See:
@@ -332,14 +312,14 @@ class Text extends Property {
                     'given',
                     'additional',
                     'prefix',
-                    'suffix'
+                    'suffix',
                 ]);
                 break;
 
             case 'GENDER':
                 $map([
                     'sex',
-                    'text'
+                    'text',
                 ]);
                 break;
 
@@ -351,21 +331,20 @@ class Text extends Property {
                     'locality',
                     'region',
                     'code',
-                    'country'
+                    'country',
                 ]);
                 break;
 
             case 'CLIENTPIDMAP':
                 $map([
                     'sourceid',
-                    'uri'
+                    'uri',
                 ]);
                 break;
 
             default:
                 parent::xmlSerializeValue($writer);
         }
-
     }
 
     /**
@@ -386,28 +365,26 @@ class Text extends Property {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $warnings = parent::validate($options);
 
         if (isset($this->minimumPropertyValues[$this->name])) {
-
             $minimum = $this->minimumPropertyValues[$this->name];
             $parts = $this->getParts();
             if (count($parts) < $minimum) {
                 $warnings[] = [
-                    'level'   => $options & self::REPAIR ? 1 : 3,
-                    'message' => 'The ' . $this->name . ' property must have at least ' . $minimum . ' values. It only has ' . count($parts),
-                    'node'    => $this,
+                    'level' => $options & self::REPAIR ? 1 : 3,
+                    'message' => 'The '.$this->name.' property must have at least '.$minimum.' values. It only has '.count($parts),
+                    'node' => $this,
                 ];
                 if ($options & self::REPAIR) {
                     $parts = array_pad($parts, $minimum, '');
                     $this->setParts($parts);
                 }
             }
-
         }
-        return $warnings;
 
+        return $warnings;
     }
 }
diff --git a/vendor/sabre/vobject/lib/Property/Time.php b/vendor/sabre/vobject/lib/Property/Time.php
index dbafc3b85..7aeafc8d0 100644
--- a/vendor/sabre/vobject/lib/Property/Time.php
+++ b/vendor/sabre/vobject/lib/Property/Time.php
@@ -13,8 +13,8 @@ use Sabre\VObject\DateTimeParser;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Time extends Text {
-
+class Time extends Text
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -31,10 +31,9 @@ class Time extends Text {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'TIME';
-
     }
 
     /**
@@ -43,11 +42,9 @@ class Time extends Text {
      * The value must always be an array.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setJsonValue(array $value) {
-
+    public function setJsonValue(array $value)
+    {
         // Removing colons from value.
         $value = str_replace(
             ':',
@@ -55,12 +52,11 @@ class Time extends Text {
             $value
         );
 
-        if (count($value) === 1) {
+        if (1 === count($value)) {
             $this->setValue(reset($value));
         } else {
             $this->setValue($value);
         }
-
     }
 
     /**
@@ -70,8 +66,8 @@ class Time extends Text {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         $parts = DateTimeParser::parseVCardTime($this->getValue());
         $timeStr = '';
 
@@ -109,7 +105,7 @@ class Time extends Text {
 
         // Timezone
         if (!is_null($parts['timezone'])) {
-            if ($parts['timezone'] === 'Z') {
+            if ('Z' === $parts['timezone']) {
                 $timeStr .= 'Z';
             } else {
                 $timeStr .=
@@ -118,7 +114,6 @@ class Time extends Text {
         }
 
         return [$timeStr];
-
     }
 
     /**
@@ -126,19 +121,15 @@ class Time extends Text {
      * object.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setXmlValue(array $value) {
-
+    public function setXmlValue(array $value)
+    {
         $value = array_map(
-            function($value) {
+            function ($value) {
                 return str_replace(':', '', $value);
             },
             $value
         );
         parent::setXmlValue($value);
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/Unknown.php b/vendor/sabre/vobject/lib/Property/Unknown.php
index 7a3373868..6f404c286 100644
--- a/vendor/sabre/vobject/lib/Property/Unknown.php
+++ b/vendor/sabre/vobject/lib/Property/Unknown.php
@@ -12,8 +12,8 @@ namespace Sabre\VObject\Property;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Unknown extends Text {
-
+class Unknown extends Text
+{
     /**
      * Returns the value, in the format it should be encoded for json.
      *
@@ -21,10 +21,9 @@ class Unknown extends Text {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         return [$this->getRawMimeDirValue()];
-
     }
 
     /**
@@ -35,10 +34,8 @@ class Unknown extends Text {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'UNKNOWN';
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/Uri.php b/vendor/sabre/vobject/lib/Property/Uri.php
index 88fcfaab8..3449ba1f2 100644
--- a/vendor/sabre/vobject/lib/Property/Uri.php
+++ b/vendor/sabre/vobject/lib/Property/Uri.php
@@ -14,8 +14,8 @@ use Sabre\VObject\Property;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Uri extends Text {
-
+class Uri extends Text
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -32,10 +32,9 @@ class Uri extends Text {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'URI';
-
     }
 
     /**
@@ -43,8 +42,8 @@ class Uri extends Text {
      *
      * @return array
      */
-    function parameters() {
-
+    public function parameters()
+    {
         $parameters = parent::parameters();
         if (!isset($parameters['VALUE']) && in_array($this->name, ['URL', 'PHOTO'])) {
             // If we are encoding a URI value, and this URI value has no
@@ -57,8 +56,8 @@ class Uri extends Text {
             // See Issue #227 and #235
             $parameters['VALUE'] = new Parameter($this->root, 'VALUE', 'URI');
         }
-        return $parameters;
 
+        return $parameters;
     }
 
     /**
@@ -68,11 +67,9 @@ class Uri extends Text {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         // Normally we don't need to do any type of unescaping for these
         // properties, however.. we've noticed that Google Contacts
         // specifically escapes the colon (:) with a blackslash. While I have
@@ -81,16 +78,16 @@ class Uri extends Text {
         //
         // Good thing backslashes are not allowed in urls. Makes it easy to
         // assume that a backslash is always intended as an escape character.
-        if ($this->name === 'URL') {
+        if ('URL' === $this->name) {
             $regex = '#  (?: (\\\\ (?: \\\\ | : ) ) ) #x';
             $matches = preg_split($regex, $val, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
             $newVal = '';
             foreach ($matches as $match) {
                 switch ($match) {
-                    case '\:' :
+                    case '\:':
                         $newVal .= ':';
                         break;
-                    default :
+                    default:
                         $newVal .= $match;
                         break;
                 }
@@ -99,7 +96,6 @@ class Uri extends Text {
         } else {
             $this->value = strtr($val, ['\,' => ',']);
         }
-
     }
 
     /**
@@ -107,8 +103,8 @@ class Uri extends Text {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         if (is_array($this->value)) {
             $value = $this->value[0];
         } else {
@@ -116,7 +112,5 @@ class Uri extends Text {
         }
 
         return strtr($value, [',' => '\,']);
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/UtcOffset.php b/vendor/sabre/vobject/lib/Property/UtcOffset.php
index 61895c48e..732239e23 100644
--- a/vendor/sabre/vobject/lib/Property/UtcOffset.php
+++ b/vendor/sabre/vobject/lib/Property/UtcOffset.php
@@ -11,8 +11,8 @@ namespace Sabre\VObject\Property;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class UtcOffset extends Text {
-
+class UtcOffset extends Text
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -29,10 +29,9 @@ class UtcOffset extends Text {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'UTC-OFFSET';
-
     }
 
     /**
@@ -41,19 +40,16 @@ class UtcOffset extends Text {
      * The value must always be an array.
      *
      * @param array $value
-     *
-     * @return void
      */
-    function setJsonValue(array $value) {
-
+    public function setJsonValue(array $value)
+    {
         $value = array_map(
-            function($value) {
+            function ($value) {
                 return str_replace(':', '', $value);
             },
             $value
         );
         parent::setJsonValue($value);
-
     }
 
     /**
@@ -63,15 +59,14 @@ class UtcOffset extends Text {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         return array_map(
-            function($value) {
-                return substr($value, 0, -2) . ':' .
+            function ($value) {
+                return substr($value, 0, -2).':'.
                        substr($value, -2);
             },
             parent::getJsonValue()
         );
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Property/VCard/Date.php b/vendor/sabre/vobject/lib/Property/VCard/Date.php
index 1ef6dff34..a018ccbb8 100644
--- a/vendor/sabre/vobject/lib/Property/VCard/Date.php
+++ b/vendor/sabre/vobject/lib/Property/VCard/Date.php
@@ -11,8 +11,8 @@ namespace Sabre\VObject\Property\VCard;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Date extends DateAndOrTime {
-
+class Date extends DateAndOrTime
+{
     /**
      * Returns the type of value.
      *
@@ -21,23 +21,18 @@ class Date extends DateAndOrTime {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'DATE';
-
     }
 
     /**
      * Sets the property as a DateTime object.
      *
      * @param \DateTimeInterface $dt
-     *
-     * @return void
      */
-    function setDateTime(\DateTimeInterface $dt) {
-
+    public function setDateTime(\DateTimeInterface $dt)
+    {
         $this->value = $dt->format('Ymd');
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/VCard/DateAndOrTime.php b/vendor/sabre/vobject/lib/Property/VCard/DateAndOrTime.php
index 3b4ae3bb5..b7e17492a 100644
--- a/vendor/sabre/vobject/lib/Property/VCard/DateAndOrTime.php
+++ b/vendor/sabre/vobject/lib/Property/VCard/DateAndOrTime.php
@@ -19,12 +19,12 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class DateAndOrTime extends Property {
-
+class DateAndOrTime extends Property
+{
     /**
      * Field separator.
      *
-     * @var null|string
+     * @var string|null
      */
     public $delimiter = null;
 
@@ -36,10 +36,9 @@ class DateAndOrTime extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'DATE-AND-OR-TIME';
-
     }
 
     /**
@@ -48,11 +47,9 @@ class DateAndOrTime extends Property {
      * You may also specify DateTimeInterface objects here.
      *
      * @param array $parts
-     *
-     * @return void
      */
-    function setParts(array $parts) {
-
+    public function setParts(array $parts)
+    {
         if (count($parts) > 1) {
             throw new \InvalidArgumentException('Only one value allowed');
         }
@@ -61,7 +58,6 @@ class DateAndOrTime extends Property {
         } else {
             parent::setParts($parts);
         }
-
     }
 
     /**
@@ -72,28 +68,23 @@ class DateAndOrTime extends Property {
      * Instead of strings, you may also use DateTimeInterface here.
      *
      * @param string|array|DateTimeInterface $value
-     *
-     * @return void
      */
-    function setValue($value) {
-
+    public function setValue($value)
+    {
         if ($value instanceof DateTimeInterface) {
             $this->setDateTime($value);
         } else {
             parent::setValue($value);
         }
-
     }
 
     /**
      * Sets the property as a DateTime object.
      *
      * @param DateTimeInterface $dt
-     *
-     * @return void
      */
-    function setDateTime(DateTimeInterface $dt) {
-
+    public function setDateTime(DateTimeInterface $dt)
+    {
         $tz = $dt->getTimeZone();
         $isUtc = in_array($tz->getName(), ['UTC', 'GMT', 'Z']);
 
@@ -105,7 +96,6 @@ class DateAndOrTime extends Property {
         }
 
         $this->value = $value;
-
     }
 
     /**
@@ -124,12 +114,12 @@ class DateAndOrTime extends Property {
      *
      * @return DateTimeImmutable
      */
-    function getDateTime() {
-
+    public function getDateTime()
+    {
         $now = new DateTime();
 
-        $tzFormat = $now->getTimezone()->getOffset($now) === 0 ? '\\Z' : 'O';
-        $nowParts = DateTimeParser::parseVCardDateTime($now->format('Ymd\\This' . $tzFormat));
+        $tzFormat = 0 === $now->getTimezone()->getOffset($now) ? '\\Z' : 'O';
+        $nowParts = DateTimeParser::parseVCardDateTime($now->format('Ymd\\This'.$tzFormat));
 
         $dateParts = DateTimeParser::parseVCardDateTime($this->getValue());
 
@@ -141,8 +131,8 @@ class DateAndOrTime extends Property {
                 $dateParts[$k] = $nowParts[$k];
             }
         }
-        return new DateTimeImmutable("$dateParts[year]-$dateParts[month]-$dateParts[date] $dateParts[hour]:$dateParts[minute]:$dateParts[second] $dateParts[timezone]");
 
+        return new DateTimeImmutable("$dateParts[year]-$dateParts[month]-$dateParts[date] $dateParts[hour]:$dateParts[minute]:$dateParts[second] $dateParts[timezone]");
     }
 
     /**
@@ -152,15 +142,14 @@ class DateAndOrTime extends Property {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         $parts = DateTimeParser::parseVCardDateTime($this->getValue());
 
         $dateStr = '';
 
         // Year
         if (!is_null($parts['year'])) {
-
             $dateStr .= $parts['year'];
 
             if (!is_null($parts['month'])) {
@@ -168,26 +157,21 @@ class DateAndOrTime extends Property {
                 // dash.
                 $dateStr .= '-';
             }
-
         } else {
-
             if (!is_null($parts['month']) || !is_null($parts['date'])) {
                 // Inserting two dashes
                 $dateStr .= '--';
             }
-
         }
 
         // Month
         if (!is_null($parts['month'])) {
-
             $dateStr .= $parts['month'];
 
             if (isset($parts['date'])) {
                 // If month and date are set, we need the separator dash.
                 $dateStr .= '-';
             }
-
         } elseif (isset($parts['date'])) {
             // If the month is empty, and a date is set, we need a 'empty
             // dash'
@@ -199,7 +183,6 @@ class DateAndOrTime extends Property {
             $dateStr .= $parts['date'];
         }
 
-
         // Early exit if we don't have a time string.
         if (is_null($parts['hour']) && is_null($parts['minute']) && is_null($parts['second'])) {
             return [$dateStr];
@@ -209,13 +192,11 @@ class DateAndOrTime extends Property {
 
         // Hour
         if (!is_null($parts['hour'])) {
-
             $dateStr .= $parts['hour'];
 
             if (!is_null($parts['minute'])) {
                 $dateStr .= ':';
             }
-
         } else {
             // We know either minute or second _must_ be set, so we insert a
             // dash for an empty value.
@@ -224,13 +205,11 @@ class DateAndOrTime extends Property {
 
         // Minute
         if (!is_null($parts['minute'])) {
-
             $dateStr .= $parts['minute'];
 
             if (!is_null($parts['second'])) {
                 $dateStr .= ':';
             }
-
         } elseif (isset($parts['second'])) {
             // Dash for empty minute
             $dateStr .= '-';
@@ -247,30 +226,27 @@ class DateAndOrTime extends Property {
         }
 
         return [$dateStr];
-
     }
 
     /**
      * This method serializes only the value of a property. This is used to
      * create xCard or xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    protected function xmlSerializeValue(Xml\Writer $writer) {
-
+    protected function xmlSerializeValue(Xml\Writer $writer)
+    {
         $valueType = strtolower($this->getValueType());
         $parts = DateTimeParser::parseVCardDateAndOrTime($this->getValue());
         $value = '';
 
         // $d = defined
-        $d = function($part) use ($parts) {
+        $d = function ($part) use ($parts) {
             return !is_null($parts[$part]);
         };
 
         // $r = read
-        $r = function($part) use ($parts) {
+        $r = function ($part) use ($parts) {
             return $parts[$part];
         };
 
@@ -282,31 +258,29 @@ class DateAndOrTime extends Property {
         //   }
         if (($d('year') || $d('month') || $d('date'))
             && (!$d('hour') && !$d('minute') && !$d('second') && !$d('timezone'))) {
-
             if ($d('year') && $d('month') && $d('date')) {
-                $value .= $r('year') . $r('month') . $r('date');
+                $value .= $r('year').$r('month').$r('date');
             } elseif ($d('year') && $d('month') && !$d('date')) {
-                $value .= $r('year') . '-' . $r('month');
+                $value .= $r('year').'-'.$r('month');
             } elseif (!$d('year') && $d('month')) {
-                $value .= '--' . $r('month') . $r('date');
+                $value .= '--'.$r('month').$r('date');
             } elseif (!$d('year') && !$d('month') && $d('date')) {
-                $value .= '---' . $r('date');
+                $value .= '---'.$r('date');
             }
 
-        // # 4.3.2
+            // # 4.3.2
         // value-time = element time {
         //     xsd:string { pattern = "(\d\d(\d\d(\d\d)?)?|-\d\d(\d\d?)|--\d\d)"
         //                          ~ "(Z|[+\-]\d\d(\d\d)?)?" }
         //   }
         } elseif ((!$d('year') && !$d('month') && !$d('date'))
                   && ($d('hour') || $d('minute') || $d('second'))) {
-
             if ($d('hour')) {
-                $value .= $r('hour') . $r('minute') . $r('second');
+                $value .= $r('hour').$r('minute').$r('second');
             } elseif ($d('minute')) {
-                $value .= '-' . $r('minute') . $r('second');
+                $value .= '-'.$r('minute').$r('second');
             } elseif ($d('second')) {
-                $value .= '--' . $r('second');
+                $value .= '--'.$r('second');
             }
 
             $value .= $r('timezone');
@@ -317,22 +291,19 @@ class DateAndOrTime extends Property {
         //                          ~ "(Z|[+\-]\d\d(\d\d)?)?" }
         //   }
         } elseif ($d('date') && $d('hour')) {
-
             if ($d('year') && $d('month') && $d('date')) {
-                $value .= $r('year') . $r('month') . $r('date');
+                $value .= $r('year').$r('month').$r('date');
             } elseif (!$d('year') && $d('month') && $d('date')) {
-                $value .= '--' . $r('month') . $r('date');
+                $value .= '--'.$r('month').$r('date');
             } elseif (!$d('year') && !$d('month') && $d('date')) {
-                $value .= '---' . $r('date');
+                $value .= '---'.$r('date');
             }
 
-            $value .= 'T' . $r('hour') . $r('minute') . $r('second') .
+            $value .= 'T'.$r('hour').$r('minute').$r('second').
                       $r('timezone');
-
         }
 
         $writer->writeElement($valueType, $value);
-
     }
 
     /**
@@ -342,13 +313,10 @@ class DateAndOrTime extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->setValue($val);
-
     }
 
     /**
@@ -356,10 +324,9 @@ class DateAndOrTime extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return implode($this->delimiter, $this->getParts());
-
     }
 
     /**
@@ -384,8 +351,8 @@ class DateAndOrTime extends Property {
      *
      * @return array
      */
-    function validate($options = 0) {
-
+    public function validate($options = 0)
+    {
         $messages = parent::validate($options);
         $value = $this->getValue();
 
@@ -393,13 +360,12 @@ class DateAndOrTime extends Property {
             DateTimeParser::parseVCardDateTime($value);
         } catch (InvalidDataException $e) {
             $messages[] = [
-                'level'   => 3,
-                'message' => 'The supplied value (' . $value . ') is not a correct DATE-AND-OR-TIME property',
-                'node'    => $this,
+                'level' => 3,
+                'message' => 'The supplied value ('.$value.') is not a correct DATE-AND-OR-TIME property',
+                'node' => $this,
             ];
         }
 
         return $messages;
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Property/VCard/DateTime.php b/vendor/sabre/vobject/lib/Property/VCard/DateTime.php
index e7c804ca7..49c1f3555 100644
--- a/vendor/sabre/vobject/lib/Property/VCard/DateTime.php
+++ b/vendor/sabre/vobject/lib/Property/VCard/DateTime.php
@@ -11,8 +11,8 @@ namespace Sabre\VObject\Property\VCard;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class DateTime extends DateAndOrTime {
-
+class DateTime extends DateAndOrTime
+{
     /**
      * Returns the type of value.
      *
@@ -21,10 +21,8 @@ class DateTime extends DateAndOrTime {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'DATE-TIME';
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/VCard/LanguageTag.php b/vendor/sabre/vobject/lib/Property/VCard/LanguageTag.php
index aa7e9178d..697273989 100644
--- a/vendor/sabre/vobject/lib/Property/VCard/LanguageTag.php
+++ b/vendor/sabre/vobject/lib/Property/VCard/LanguageTag.php
@@ -14,8 +14,8 @@ use
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class LanguageTag extends Property {
-
+class LanguageTag extends Property
+{
     /**
      * Sets a raw value coming from a mimedir (iCalendar/vCard) file.
      *
@@ -23,13 +23,10 @@ class LanguageTag extends Property {
      * not yet done, but parameters are not included.
      *
      * @param string $val
-     *
-     * @return void
      */
-    function setRawMimeDirValue($val) {
-
+    public function setRawMimeDirValue($val)
+    {
         $this->setValue($val);
-
     }
 
     /**
@@ -37,10 +34,9 @@ class LanguageTag extends Property {
      *
      * @return string
      */
-    function getRawMimeDirValue() {
-
+    public function getRawMimeDirValue()
+    {
         return $this->getValue();
-
     }
 
     /**
@@ -51,10 +47,8 @@ class LanguageTag extends Property {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'LANGUAGE-TAG';
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Property/VCard/TimeStamp.php b/vendor/sabre/vobject/lib/Property/VCard/TimeStamp.php
index 9d311f99d..fccf2d600 100644
--- a/vendor/sabre/vobject/lib/Property/VCard/TimeStamp.php
+++ b/vendor/sabre/vobject/lib/Property/VCard/TimeStamp.php
@@ -15,8 +15,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class TimeStamp extends Text {
-
+class TimeStamp extends Text
+{
     /**
      * In case this is a multi-value property. This string will be used as a
      * delimiter.
@@ -33,10 +33,9 @@ class TimeStamp extends Text {
      *
      * @return string
      */
-    function getValueType() {
-
+    public function getValueType()
+    {
         return 'TIMESTAMP';
-
     }
 
     /**
@@ -46,16 +45,16 @@ class TimeStamp extends Text {
      *
      * @return array
      */
-    function getJsonValue() {
-
+    public function getJsonValue()
+    {
         $parts = DateTimeParser::parseVCardDateTime($this->getValue());
 
         $dateStr =
-            $parts['year'] . '-' .
-            $parts['month'] . '-' .
-            $parts['date'] . 'T' .
-            $parts['hour'] . ':' .
-            $parts['minute'] . ':' .
+            $parts['year'].'-'.
+            $parts['month'].'-'.
+            $parts['date'].'T'.
+            $parts['hour'].':'.
+            $parts['minute'].':'.
             $parts['second'];
 
         // Timezone
@@ -64,23 +63,19 @@ class TimeStamp extends Text {
         }
 
         return [$dateStr];
-
     }
 
     /**
      * This method serializes only the value of a property. This is used to
      * create xCard or xCal documents.
      *
-     * @param Xml\Writer $writer  XML writer.
-     *
-     * @return void
+     * @param Xml\Writer $writer XML writer
      */
-    protected function xmlSerializeValue(Xml\Writer $writer) {
-
+    protected function xmlSerializeValue(Xml\Writer $writer)
+    {
         // xCard is the only XML and JSON format that has the same date and time
         // format than vCard.
         $valueType = strtolower($this->getValueType());
         $writer->writeElement($valueType, $this->getValue());
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Reader.php b/vendor/sabre/vobject/lib/Reader.php
index 709929337..055d546a5 100644
--- a/vendor/sabre/vobject/lib/Reader.php
+++ b/vendor/sabre/vobject/lib/Reader.php
@@ -12,8 +12,8 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Reader {
-
+class Reader
+{
     /**
      * If this option is passed to the reader, it will be less strict about the
      * validity of the lines.
@@ -35,18 +35,18 @@ class Reader {
      * You can either supply a string, or a readable stream for input.
      *
      * @param string|resource $data
-     * @param int $options
-     * @param string $charset
+     * @param int             $options
+     * @param string          $charset
+     *
      * @return Document
      */
-    static function read($data, $options = 0, $charset = 'UTF-8') {
-
+    public static function read($data, $options = 0, $charset = 'UTF-8')
+    {
         $parser = new Parser\MimeDir();
         $parser->setCharset($charset);
         $result = $parser->parse($data, $options);
 
         return $result;
-
     }
 
     /**
@@ -55,22 +55,21 @@ class Reader {
      * The options argument is a bitfield. Pass any of the OPTIONS constant to
      * alter the parsers' behaviour.
      *
-     * You can either a string, a readable stream, or an array for it's input.
+     * You can either a string, a readable stream, or an array for its input.
      * Specifying the array is useful if json_decode was already called on the
      * input.
      *
      * @param string|resource|array $data
-     * @param int $options
+     * @param int                   $options
      *
      * @return Document
      */
-    static function readJson($data, $options = 0) {
-
+    public static function readJson($data, $options = 0)
+    {
         $parser = new Parser\Json();
         $result = $parser->parse($data, $options);
 
         return $result;
-
     }
 
     /**
@@ -82,17 +81,15 @@ class Reader {
      * You can either supply a string, or a readable stream for input.
      *
      * @param string|resource $data
-     * @param int $options
+     * @param int             $options
      *
      * @return Document
      */
-    static function readXML($data, $options = 0) {
-
+    public static function readXML($data, $options = 0)
+    {
         $parser = new Parser\XML();
         $result = $parser->parse($data, $options);
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Recur/EventIterator.php b/vendor/sabre/vobject/lib/Recur/EventIterator.php
index d313305a0..135ecf00e 100644
--- a/vendor/sabre/vobject/lib/Recur/EventIterator.php
+++ b/vendor/sabre/vobject/lib/Recur/EventIterator.php
@@ -58,8 +58,8 @@ use Sabre\VObject\Settings;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class EventIterator implements \Iterator {
-
+class EventIterator implements \Iterator
+{
     /**
      * Reference timeZone for floating dates and times.
      *
@@ -89,12 +89,12 @@ class EventIterator implements \Iterator {
      * The $uid parameter is only required for the first method.
      *
      * @param Component|array $input
-     * @param string|null $uid
-     * @param DateTimeZone $timeZone Reference timezone for floating dates and
-     *                               times.
+     * @param string|null     $uid
+     * @param DateTimeZone    $timeZone reference timezone for floating dates and
+     *                                  times
      */
-    function __construct($input, $uid = null, DateTimeZone $timeZone = null) {
-
+    public function __construct($input, $uid = null, DateTimeZone $timeZone = null)
+    {
         if (is_null($timeZone)) {
             $timeZone = new DateTimeZone('UTC');
         }
@@ -107,7 +107,7 @@ class EventIterator implements \Iterator {
             $events = [$input];
         } else {
             // Calendar + UID mode.
-            $uid = (string)$uid;
+            $uid = (string) $uid;
             if (!$uid) {
                 throw new InvalidArgumentException('The UID argument is required when a VCALENDAR is passed to this constructor');
             }
@@ -115,24 +115,17 @@ class EventIterator implements \Iterator {
                 throw new InvalidArgumentException('No events found in this calendar');
             }
             $events = $input->getByUID($uid);
-
         }
 
         foreach ($events as $vevent) {
-
             if (!isset($vevent->{'RECURRENCE-ID'})) {
-
                 $this->masterEvent = $vevent;
-
             } else {
-
                 $this->exceptions[
                     $vevent->{'RECURRENCE-ID'}->getDateTime($this->timeZone)->getTimeStamp()
                 ] = true;
                 $this->overriddenEvents[] = $vevent;
-
             }
-
         }
 
         if (!$this->masterEvent) {
@@ -143,7 +136,7 @@ class EventIterator implements \Iterator {
             // event and use that instead. This may not always give the
             // desired result.
             if (!count($this->overriddenEvents)) {
-                throw new InvalidArgumentException('This VCALENDAR did not have an event with UID: ' . $uid);
+                throw new InvalidArgumentException('This VCALENDAR did not have an event with UID: '.$uid);
             }
             $this->masterEvent = array_shift($this->overriddenEvents);
         }
@@ -152,15 +145,11 @@ class EventIterator implements \Iterator {
         $this->allDay = !$this->masterEvent->DTSTART->hasTime();
 
         if (isset($this->masterEvent->EXDATE)) {
-
             foreach ($this->masterEvent->EXDATE as $exDate) {
-
                 foreach ($exDate->getDateTimes($this->timeZone) as $dt) {
                     $this->exceptions[$dt->getTimeStamp()] = true;
                 }
-
             }
-
         }
 
         if (isset($this->masterEvent->DTEND)) {
@@ -191,7 +180,7 @@ class EventIterator implements \Iterator {
         } else {
             $this->recurIterator = new RRuleIterator(
                 [
-                    'FREQ'  => 'DAILY',
+                    'FREQ' => 'DAILY',
                     'COUNT' => 1,
                 ],
                 $this->startDate
@@ -202,7 +191,6 @@ class EventIterator implements \Iterator {
         if (!$this->valid()) {
             throw new NoInstancesException('This recurrence rule does not generate any valid instances');
         }
-
     }
 
     /**
@@ -210,12 +198,11 @@ class EventIterator implements \Iterator {
      *
      * @return DateTimeImmutable
      */
-    function current() {
-
+    public function current()
+    {
         if ($this->currentDate) {
             return clone $this->currentDate;
         }
-
     }
 
     /**
@@ -224,12 +211,11 @@ class EventIterator implements \Iterator {
      *
      * @return DateTimeImmutable
      */
-    function getDtStart() {
-
+    public function getDtStart()
+    {
         if ($this->currentDate) {
             return clone $this->currentDate;
         }
-
     }
 
     /**
@@ -238,26 +224,26 @@ class EventIterator implements \Iterator {
      *
      * @return DateTimeImmutable
      */
-    function getDtEnd() {
-
+    public function getDtEnd()
+    {
         if (!$this->valid()) {
             return;
         }
         $end = clone $this->currentDate;
-        return $end->modify('+' . $this->eventDuration . ' seconds');
 
+        return $end->modify('+'.$this->eventDuration.' seconds');
     }
 
     /**
      * Returns a VEVENT for the current iterations of the event.
      *
-     * This VEVENT will have a recurrence id, and it's DTSTART and DTEND
+     * This VEVENT will have a recurrence id, and its DTSTART and DTEND
      * altered.
      *
      * @return VEvent
      */
-    function getEventObject() {
-
+    public function getEventObject()
+    {
         if ($this->currentOverriddenEvent) {
             return $this->currentOverriddenEvent;
         }
@@ -284,8 +270,8 @@ class EventIterator implements \Iterator {
         $recurid = clone $event->DTSTART;
         $recurid->name = 'RECURRENCE-ID';
         $event->add($recurid);
-        return $event;
 
+        return $event;
     }
 
     /**
@@ -295,11 +281,10 @@ class EventIterator implements \Iterator {
      *
      * @return int
      */
-    function key() {
-
+    public function key()
+    {
         // The counter is always 1 ahead.
         return $this->counter - 1;
-
     }
 
     /**
@@ -308,20 +293,20 @@ class EventIterator implements \Iterator {
      *
      * @return bool
      */
-    function valid() {
-
-        if ($this->counter > Settings::$maxRecurrences && Settings::$maxRecurrences !== -1) {
-            throw new MaxInstancesExceededException('Recurring events are only allowed to generate ' . Settings::$maxRecurrences);
+    public function valid()
+    {
+        if ($this->counter > Settings::$maxRecurrences && -1 !== Settings::$maxRecurrences) {
+            throw new MaxInstancesExceededException('Recurring events are only allowed to generate '.Settings::$maxRecurrences);
         }
-        return !!$this->currentDate;
 
+        return (bool) $this->currentDate;
     }
 
     /**
      * Sets the iterator back to the starting point.
      */
-    function rewind() {
-
+    public function rewind()
+    {
         $this->recurIterator->rewind();
         // re-creating overridden event index.
         $index = [];
@@ -338,18 +323,15 @@ class EventIterator implements \Iterator {
         $this->currentDate = clone $this->startDate;
 
         $this->next();
-
     }
 
     /**
      * Advances the iterator with one step.
-     *
-     * @return void
      */
-    function next() {
-
+    public function next()
+    {
         $this->currentOverriddenEvent = null;
-        $this->counter++;
+        ++$this->counter;
         if ($this->nextDate) {
             // We had a stored value.
             $nextDate = $this->nextDate;
@@ -366,14 +348,11 @@ class EventIterator implements \Iterator {
                 $nextDate = $this->recurIterator->current();
                 $this->recurIterator->next();
             } while (isset($this->exceptions[$nextDate->getTimeStamp()]));
-
         }
 
-
         // $nextDate now contains what rrule thinks is the next one, but an
         // overridden event may cut ahead.
         if ($this->overriddenEventsIndex) {
-
             $offsets = end($this->overriddenEventsIndex);
             $timestamp = key($this->overriddenEventsIndex);
             $offset = end($offsets);
@@ -393,13 +372,10 @@ class EventIterator implements \Iterator {
 
                 // Exit point!
                 return;
-
             }
-
         }
 
         $this->currentDate = $nextDate;
-
     }
 
     /**
@@ -407,12 +383,11 @@ class EventIterator implements \Iterator {
      *
      * @param DateTimeInterface $dateTime
      */
-    function fastForward(DateTimeInterface $dateTime) {
-
+    public function fastForward(DateTimeInterface $dateTime)
+    {
         while ($this->valid() && $this->getDtEnd() <= $dateTime) {
             $this->next();
         }
-
     }
 
     /**
@@ -420,10 +395,9 @@ class EventIterator implements \Iterator {
      *
      * @return bool
      */
-    function isInfinite() {
-
+    public function isInfinite()
+    {
         return $this->recurIterator->isInfinite();
-
     }
 
     /**
@@ -504,10 +478,9 @@ class EventIterator implements \Iterator {
     protected $nextDate;
 
     /**
-     * The event that overwrites the current iteration
+     * The event that overwrites the current iteration.
      *
      * @var VEVENT
      */
     protected $currentOverriddenEvent;
-
 }
diff --git a/vendor/sabre/vobject/lib/Recur/MaxInstancesExceededException.php b/vendor/sabre/vobject/lib/Recur/MaxInstancesExceededException.php
index 264df7d2b..cb0835813 100644
--- a/vendor/sabre/vobject/lib/Recur/MaxInstancesExceededException.php
+++ b/vendor/sabre/vobject/lib/Recur/MaxInstancesExceededException.php
@@ -12,5 +12,6 @@ use Exception;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
-class MaxInstancesExceededException extends Exception {
+class MaxInstancesExceededException extends Exception
+{
 }
diff --git a/vendor/sabre/vobject/lib/Recur/NoInstancesException.php b/vendor/sabre/vobject/lib/Recur/NoInstancesException.php
index 8f8bb472b..b55af567d 100644
--- a/vendor/sabre/vobject/lib/Recur/NoInstancesException.php
+++ b/vendor/sabre/vobject/lib/Recur/NoInstancesException.php
@@ -13,6 +13,6 @@ use Exception;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
  */
-class NoInstancesException extends Exception {
-
+class NoInstancesException extends Exception
+{
 }
diff --git a/vendor/sabre/vobject/lib/Recur/RDateIterator.php b/vendor/sabre/vobject/lib/Recur/RDateIterator.php
index f44960e12..013694b95 100644
--- a/vendor/sabre/vobject/lib/Recur/RDateIterator.php
+++ b/vendor/sabre/vobject/lib/Recur/RDateIterator.php
@@ -19,29 +19,30 @@ use Sabre\VObject\DateTimeParser;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class RDateIterator implements Iterator {
-
+class RDateIterator implements Iterator
+{
     /**
      * Creates the Iterator.
      *
-     * @param string|array $rrule
+     * @param string|array      $rrule
      * @param DateTimeInterface $start
      */
-    function __construct($rrule, DateTimeInterface $start) {
-
+    public function __construct($rrule, DateTimeInterface $start)
+    {
         $this->startDate = $start;
         $this->parseRDate($rrule);
         $this->currentDate = clone $this->startDate;
-
     }
 
     /* Implementation of the Iterator interface {{{ */
 
-    function current() {
+    public function current()
+    {
+        if (!$this->valid()) {
+            return;
+        }
 
-        if (!$this->valid()) return;
         return clone $this->currentDate;
-
     }
 
     /**
@@ -49,10 +50,9 @@ class RDateIterator implements Iterator {
      *
      * @return int
      */
-    function key() {
-
+    public function key()
+    {
         return $this->counter;
-
     }
 
     /**
@@ -61,40 +61,35 @@ class RDateIterator implements Iterator {
      *
      * @return bool
      */
-    function valid() {
-
-        return ($this->counter <= count($this->dates));
-
+    public function valid()
+    {
+        return $this->counter <= count($this->dates);
     }
 
     /**
      * Resets the iterator.
-     *
-     * @return void
      */
-    function rewind() {
-
+    public function rewind()
+    {
         $this->currentDate = clone $this->startDate;
         $this->counter = 0;
-
     }
 
     /**
      * Goes on to the next iteration.
-     *
-     * @return void
      */
-    function next() {
-
-        $this->counter++;
-        if (!$this->valid()) return;
+    public function next()
+    {
+        ++$this->counter;
+        if (!$this->valid()) {
+            return;
+        }
 
         $this->currentDate =
             DateTimeParser::parse(
                 $this->dates[$this->counter - 1],
                 $this->startDate->getTimezone()
             );
-
     }
 
     /* End of Iterator implementation }}} */
@@ -104,10 +99,9 @@ class RDateIterator implements Iterator {
      *
      * @return bool
      */
-    function isInfinite() {
-
+    public function isInfinite()
+    {
         return false;
-
     }
 
     /**
@@ -115,15 +109,12 @@ class RDateIterator implements Iterator {
      * specified date.
      *
      * @param DateTimeInterface $dt
-     *
-     * @return void
      */
-    function fastForward(DateTimeInterface $dt) {
-
+    public function fastForward(DateTimeInterface $dt)
+    {
         while ($this->valid() && $this->currentDate < $dt) {
             $this->next();
         }
-
     }
 
     /**
@@ -159,24 +150,20 @@ class RDateIterator implements Iterator {
      * class with all the values.
      *
      * @param string|array $rrule
-     *
-     * @return void
      */
-    protected function parseRDate($rdate) {
-
+    protected function parseRDate($rdate)
+    {
         if (is_string($rdate)) {
             $rdate = explode(',', $rdate);
         }
 
         $this->dates = $rdate;
-
     }
 
     /**
-     * Array with the RRULE dates
+     * Array with the RRULE dates.
      *
      * @var array
      */
     protected $dates = [];
-
 }
diff --git a/vendor/sabre/vobject/lib/Recur/RRuleIterator.php b/vendor/sabre/vobject/lib/Recur/RRuleIterator.php
index dbea1155d..554507f19 100644
--- a/vendor/sabre/vobject/lib/Recur/RRuleIterator.php
+++ b/vendor/sabre/vobject/lib/Recur/RRuleIterator.php
@@ -22,29 +22,30 @@ use Sabre\VObject\Property;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class RRuleIterator implements Iterator {
-
+class RRuleIterator implements Iterator
+{
     /**
      * Creates the Iterator.
      *
-     * @param string|array $rrule
+     * @param string|array      $rrule
      * @param DateTimeInterface $start
      */
-    function __construct($rrule, DateTimeInterface $start) {
-
+    public function __construct($rrule, DateTimeInterface $start)
+    {
         $this->startDate = $start;
         $this->parseRRule($rrule);
         $this->currentDate = clone $this->startDate;
-
     }
 
     /* Implementation of the Iterator interface {{{ */
 
-    function current() {
+    public function current()
+    {
+        if (!$this->valid()) {
+            return;
+        }
 
-        if (!$this->valid()) return;
         return clone $this->currentDate;
-
     }
 
     /**
@@ -52,10 +53,9 @@ class RRuleIterator implements Iterator {
      *
      * @return int
      */
-    function key() {
-
+    public function key()
+    {
         return $this->counter;
-
     }
 
     /**
@@ -65,61 +65,53 @@ class RRuleIterator implements Iterator {
      *
      * @return bool
      */
-    function valid() {
-
+    public function valid()
+    {
         if (!is_null($this->count)) {
             return $this->counter < $this->count;
         }
-        return is_null($this->until) || $this->currentDate <= $this->until;
 
+        return is_null($this->until) || $this->currentDate <= $this->until;
     }
 
     /**
      * Resets the iterator.
-     *
-     * @return void
      */
-    function rewind() {
-
+    public function rewind()
+    {
         $this->currentDate = clone $this->startDate;
         $this->counter = 0;
-
     }
 
     /**
      * Goes on to the next iteration.
-     *
-     * @return void
      */
-    function next() {
-
+    public function next()
+    {
         // Otherwise, we find the next event in the normal RRULE
         // sequence.
         switch ($this->frequency) {
-
-            case 'hourly' :
+            case 'hourly':
                 $this->nextHourly();
                 break;
 
-            case 'daily' :
+            case 'daily':
                 $this->nextDaily();
                 break;
 
-            case 'weekly' :
+            case 'weekly':
                 $this->nextWeekly();
                 break;
 
-            case 'monthly' :
+            case 'monthly':
                 $this->nextMonthly();
                 break;
 
-            case 'yearly' :
+            case 'yearly':
                 $this->nextYearly();
                 break;
-
         }
-        $this->counter++;
-
+        ++$this->counter;
     }
 
     /* End of Iterator implementation }}} */
@@ -129,10 +121,9 @@ class RRuleIterator implements Iterator {
      *
      * @return bool
      */
-    function isInfinite() {
-
+    public function isInfinite()
+    {
         return !$this->count && !$this->until;
-
     }
 
     /**
@@ -140,15 +131,12 @@ class RRuleIterator implements Iterator {
      * specified date.
      *
      * @param DateTimeInterface $dt
-     *
-     * @return void
      */
-    function fastForward(DateTimeInterface $dt) {
-
+    public function fastForward(DateTimeInterface $dt)
+    {
         while ($this->valid() && $this->currentDate < $dt) {
             $this->next();
         }
-
     }
 
     /**
@@ -317,24 +305,20 @@ class RRuleIterator implements Iterator {
 
     /**
      * Does the processing for advancing the iterator for hourly frequency.
-     *
-     * @return void
      */
-    protected function nextHourly() {
-
-        $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' hours');
-
+    protected function nextHourly()
+    {
+        $this->currentDate = $this->currentDate->modify('+'.$this->interval.' hours');
     }
 
     /**
      * Does the processing for advancing the iterator for daily frequency.
-     *
-     * @return void
      */
-    protected function nextDaily() {
-
+    protected function nextDaily()
+    {
         if (!$this->byHour && !$this->byDay) {
-            $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' days');
+            $this->currentDate = $this->currentDate->modify('+'.$this->interval.' days');
+
             return;
         }
 
@@ -352,16 +336,14 @@ class RRuleIterator implements Iterator {
 
         do {
             if ($this->byHour) {
-                if ($this->currentDate->format('G') == '23') {
+                if ('23' == $this->currentDate->format('G')) {
                     // to obey the interval rule
-                    $this->currentDate = $this->currentDate->modify('+' . $this->interval - 1 . ' days');
+                    $this->currentDate = $this->currentDate->modify('+'.$this->interval - 1 .' days');
                 }
 
                 $this->currentDate = $this->currentDate->modify('+1 hours');
-
             } else {
-                $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' days');
-
+                $this->currentDate = $this->currentDate->modify('+'.$this->interval.' days');
             }
 
             // Current month of the year
@@ -372,24 +354,21 @@ class RRuleIterator implements Iterator {
 
             // Current hour of the day
             $currentHour = $this->currentDate->format('G');
-
         } while (
             ($this->byDay && !in_array($currentDay, $recurrenceDays)) ||
             ($this->byHour && !in_array($currentHour, $recurrenceHours)) ||
             ($this->byMonth && !in_array($currentMonth, $recurrenceMonths))
         );
-
     }
 
     /**
      * Does the processing for advancing the iterator for weekly frequency.
-     *
-     * @return void
      */
-    protected function nextWeekly() {
-
+    protected function nextWeekly()
+    {
         if (!$this->byHour && !$this->byDay) {
-            $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' weeks');
+            $this->currentDate = $this->currentDate->modify('+'.$this->interval.' weeks');
+
             return;
         }
 
@@ -405,7 +384,6 @@ class RRuleIterator implements Iterator {
         $firstDay = $this->dayMap[$this->weekStart];
 
         do {
-
             if ($this->byHour) {
                 $this->currentDate = $this->currentDate->modify('+1 hours');
             } else {
@@ -413,19 +391,19 @@ class RRuleIterator implements Iterator {
             }
 
             // Current day of the week
-            $currentDay = (int)$this->currentDate->format('w');
+            $currentDay = (int) $this->currentDate->format('w');
 
             // Current hour of the day
-            $currentHour = (int)$this->currentDate->format('G');
+            $currentHour = (int) $this->currentDate->format('G');
 
             // We need to roll over to the next week
-            if ($currentDay === $firstDay && (!$this->byHour || $currentHour == '0')) {
-                $this->currentDate = $this->currentDate->modify('+' . $this->interval - 1 . ' weeks');
+            if ($currentDay === $firstDay && (!$this->byHour || '0' == $currentHour)) {
+                $this->currentDate = $this->currentDate->modify('+'.$this->interval - 1 .' weeks');
 
                 // We need to go to the first day of this week, but only if we
                 // are not already on this first day of this week.
                 if ($this->currentDate->format('w') != $firstDay) {
-                    $this->currentDate = $this->currentDate->modify('last ' . $this->dayNames[$this->dayMap[$this->weekStart]]);
+                    $this->currentDate = $this->currentDate->modify('last '.$this->dayNames[$this->dayMap[$this->weekStart]]);
                 }
             }
 
@@ -435,43 +413,38 @@ class RRuleIterator implements Iterator {
 
     /**
      * Does the processing for advancing the iterator for monthly frequency.
-     *
-     * @return void
      */
-    protected function nextMonthly() {
-
+    protected function nextMonthly()
+    {
         $currentDayOfMonth = $this->currentDate->format('j');
         if (!$this->byMonthDay && !$this->byDay) {
-
             // If the current day is higher than the 28th, rollover can
             // occur to the next month. We Must skip these invalid
             // entries.
             if ($currentDayOfMonth < 29) {
-                $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' months');
+                $this->currentDate = $this->currentDate->modify('+'.$this->interval.' months');
             } else {
                 $increase = 0;
                 do {
-                    $increase++;
+                    ++$increase;
                     $tempDate = clone $this->currentDate;
-                    $tempDate = $tempDate->modify('+ ' . ($this->interval * $increase) . ' months');
+                    $tempDate = $tempDate->modify('+ '.($this->interval * $increase).' months');
                 } while ($tempDate->format('j') != $currentDayOfMonth);
                 $this->currentDate = $tempDate;
             }
+
             return;
         }
 
         while (true) {
-
             $occurrences = $this->getMonthlyOccurrences();
 
             foreach ($occurrences as $occurrence) {
-
                 // The first occurrence thats higher than the current
                 // day of the month wins.
                 if ($occurrence > $currentDayOfMonth) {
                     break 2;
                 }
-
             }
 
             // If we made it all the way here, it means there were no
@@ -483,42 +456,36 @@ class RRuleIterator implements Iterator {
             // $this->currentDate->modify('first day of this month');
             $this->currentDate = new DateTimeImmutable($this->currentDate->format('Y-m-1 H:i:s'), $this->currentDate->getTimezone());
             // end of workaround
-            $this->currentDate = $this->currentDate->modify('+ ' . $this->interval . ' months');
+            $this->currentDate = $this->currentDate->modify('+ '.$this->interval.' months');
 
             // This goes to 0 because we need to start counting at the
             // beginning.
             $currentDayOfMonth = 0;
-
         }
 
         $this->currentDate = $this->currentDate->setDate(
-            (int)$this->currentDate->format('Y'),
-            (int)$this->currentDate->format('n'),
-            (int)$occurrence
+            (int) $this->currentDate->format('Y'),
+            (int) $this->currentDate->format('n'),
+            (int) $occurrence
         );
-
     }
 
     /**
      * Does the processing for advancing the iterator for yearly frequency.
-     *
-     * @return void
      */
-    protected function nextYearly() {
-
+    protected function nextYearly()
+    {
         $currentMonth = $this->currentDate->format('n');
         $currentYear = $this->currentDate->format('Y');
         $currentDayOfMonth = $this->currentDate->format('j');
 
         // No sub-rules, so we just advance by year
         if (empty($this->byMonth)) {
-
             // Unless it was a leap day!
-            if ($currentMonth == 2 && $currentDayOfMonth == 29) {
-
+            if (2 == $currentMonth && 29 == $currentDayOfMonth) {
                 $counter = 0;
                 do {
-                    $counter++;
+                    ++$counter;
                     // Here we increase the year count by the interval, until
                     // we hit a date that's also in a leap year.
                     //
@@ -528,16 +495,15 @@ class RRuleIterator implements Iterator {
                     // 400. (1800, 1900, 2100). So we just rely on the datetime
                     // functions instead.
                     $nextDate = clone $this->currentDate;
-                    $nextDate = $nextDate->modify('+ ' . ($this->interval * $counter) . ' years');
-                } while ($nextDate->format('n') != 2);
+                    $nextDate = $nextDate->modify('+ '.($this->interval * $counter).' years');
+                } while (2 != $nextDate->format('n'));
 
                 $this->currentDate = $nextDate;
 
                 return;
-
             }
 
-            if ($this->byWeekNo !== null) { // byWeekNo is an array with values from -53 to -1, or 1 to 53
+            if (null !== $this->byWeekNo) { // byWeekNo is an array with values from -53 to -1, or 1 to 53
                 $dayOffsets = [];
                 if ($this->byDay) {
                     foreach ($this->byDay as $byDay) {
@@ -566,6 +532,7 @@ class RRuleIterator implements Iterator {
 
                     if (count($checkDates) > 0) {
                         $this->currentDate = min($checkDates);
+
                         return;
                     }
 
@@ -574,14 +541,14 @@ class RRuleIterator implements Iterator {
                 }
             }
 
-            if ($this->byYearDay !== null) { // byYearDay is an array with values from -366 to -1, or 1 to 366
+            if (null !== $this->byYearDay) { // byYearDay is an array with values from -366 to -1, or 1 to 366
                 $dayOffsets = [];
                 if ($this->byDay) {
                     foreach ($this->byDay as $byDay) {
                         $dayOffsets[] = $this->dayMap[$byDay];
                     }
                 } else {   // default is Monday-Sunday
-                    $dayOffsets = [1,2,3,4,5,6,7];
+                    $dayOffsets = [1, 2, 3, 4, 5, 6, 7];
                 }
 
                 $currentYear = $this->currentDate->format('Y');
@@ -594,9 +561,9 @@ class RRuleIterator implements Iterator {
                         $date = clone $this->currentDate;
                         $date = $date->setDate($currentYear, 1, 1);
                         if ($byYearDay > 0) {
-                            $date = $date->add(new \DateInterval('P' . $byYearDay . 'D'));
+                            $date = $date->add(new \DateInterval('P'.$byYearDay.'D'));
                         } else {
-                            $date = $date->sub(new \DateInterval('P' . abs($byYearDay) . 'D'));
+                            $date = $date->sub(new \DateInterval('P'.abs($byYearDay).'D'));
                         }
 
                         if ($date > $this->currentDate && in_array($date->format('N'), $dayOffsets)) {
@@ -606,6 +573,7 @@ class RRuleIterator implements Iterator {
 
                     if (count($checkDates) > 0) {
                         $this->currentDate = min($checkDates);
+
                         return;
                     }
 
@@ -615,9 +583,9 @@ class RRuleIterator implements Iterator {
             }
 
             // The easiest form
-            $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' years');
-            return;
+            $this->currentDate = $this->currentDate->modify('+'.$this->interval.' years');
 
+            return;
         }
 
         $currentMonth = $this->currentDate->format('n');
@@ -629,13 +597,10 @@ class RRuleIterator implements Iterator {
         // If we got a byDay or getMonthDay filter, we must first expand
         // further.
         if ($this->byDay || $this->byMonthDay) {
-
             while (true) {
-
                 $occurrences = $this->getMonthlyOccurrences();
 
                 foreach ($occurrences as $occurrence) {
-
                     // The first occurrence that's higher than the current
                     // day of the month wins.
                     // If we advanced to the next month or year, the first
@@ -643,7 +608,6 @@ class RRuleIterator implements Iterator {
                     if ($occurrence > $currentDayOfMonth || $advancedToNewMonth) {
                         break 2;
                     }
-
                 }
 
                 // If we made it here, it means we need to advance to
@@ -651,8 +615,7 @@ class RRuleIterator implements Iterator {
                 $currentDayOfMonth = 1;
                 $advancedToNewMonth = true;
                 do {
-
-                    $currentMonth++;
+                    ++$currentMonth;
                     if ($currentMonth > 12) {
                         $currentYear += $this->interval;
                         $currentMonth = 1;
@@ -660,43 +623,38 @@ class RRuleIterator implements Iterator {
                 } while (!in_array($currentMonth, $this->byMonth));
 
                 $this->currentDate = $this->currentDate->setDate(
-                    (int)$currentYear,
-                    (int)$currentMonth,
-                    (int)$currentDayOfMonth
+                    (int) $currentYear,
+                    (int) $currentMonth,
+                    (int) $currentDayOfMonth
                 );
-
             }
 
             // If we made it here, it means we got a valid occurrence
             $this->currentDate = $this->currentDate->setDate(
-                (int)$currentYear,
-                (int)$currentMonth,
-                (int)$occurrence
+                (int) $currentYear,
+                (int) $currentMonth,
+                (int) $occurrence
             );
-            return;
 
+            return;
         } else {
-
             // These are the 'byMonth' rules, if there are no byDay or
             // byMonthDay sub-rules.
             do {
-
-                $currentMonth++;
+                ++$currentMonth;
                 if ($currentMonth > 12) {
                     $currentYear += $this->interval;
                     $currentMonth = 1;
                 }
             } while (!in_array($currentMonth, $this->byMonth));
             $this->currentDate = $this->currentDate->setDate(
-                (int)$currentYear,
-                (int)$currentMonth,
-                (int)$currentDayOfMonth
+                (int) $currentYear,
+                (int) $currentMonth,
+                (int) $currentDayOfMonth
             );
 
             return;
-
         }
-
     }
 
     /* }}} */
@@ -706,32 +664,28 @@ class RRuleIterator implements Iterator {
      * class with all the values.
      *
      * @param string|array $rrule
-     *
-     * @return void
      */
-    protected function parseRRule($rrule) {
-
+    protected function parseRRule($rrule)
+    {
         if (is_string($rrule)) {
             $rrule = Property\ICalendar\Recur::stringToArray($rrule);
         }
 
         foreach ($rrule as $key => $value) {
-
             $key = strtoupper($key);
             switch ($key) {
-
-                case 'FREQ' :
+                case 'FREQ':
                     $value = strtolower($value);
                     if (!in_array(
                         $value,
                         ['secondly', 'minutely', 'hourly', 'daily', 'weekly', 'monthly', 'yearly']
                     )) {
-                        throw new InvalidDataException('Unknown value for FREQ=' . strtoupper($value));
+                        throw new InvalidDataException('Unknown value for FREQ='.strtoupper($value));
                     }
                     $this->frequency = $value;
                     break;
 
-                case 'UNTIL' :
+                case 'UNTIL':
                     $this->until = DateTimeParser::parse($value, $this->startDate->getTimezone());
 
                     // In some cases events are generated with an UNTIL=
@@ -747,86 +701,82 @@ class RRuleIterator implements Iterator {
                     }
                     break;
 
-                case 'INTERVAL' :
-                    // No break
+                case 'INTERVAL':
 
-                case 'COUNT' :
-                    $val = (int)$value;
+                case 'COUNT':
+                    $val = (int) $value;
                     if ($val < 1) {
-                        throw new InvalidDataException(strtoupper($key) . ' in RRULE must be a positive integer!');
+                        throw new InvalidDataException(strtoupper($key).' in RRULE must be a positive integer!');
                     }
                     $key = strtolower($key);
                     $this->$key = $val;
                     break;
 
-                case 'BYSECOND' :
-                    $this->bySecond = (array)$value;
+                case 'BYSECOND':
+                    $this->bySecond = (array) $value;
                     break;
 
-                case 'BYMINUTE' :
-                    $this->byMinute = (array)$value;
+                case 'BYMINUTE':
+                    $this->byMinute = (array) $value;
                     break;
 
-                case 'BYHOUR' :
-                    $this->byHour = (array)$value;
+                case 'BYHOUR':
+                    $this->byHour = (array) $value;
                     break;
 
-                case 'BYDAY' :
-                    $value = (array)$value;
+                case 'BYDAY':
+                    $value = (array) $value;
                     foreach ($value as $part) {
                         if (!preg_match('#^  (-|\+)? ([1-5])? (MO|TU|WE|TH|FR|SA|SU) $# xi', $part)) {
-                            throw new InvalidDataException('Invalid part in BYDAY clause: ' . $part);
+                            throw new InvalidDataException('Invalid part in BYDAY clause: '.$part);
                         }
                     }
                     $this->byDay = $value;
                     break;
 
-                case 'BYMONTHDAY' :
-                    $this->byMonthDay = (array)$value;
+                case 'BYMONTHDAY':
+                    $this->byMonthDay = (array) $value;
                     break;
 
-                case 'BYYEARDAY' :
-                    $this->byYearDay = (array)$value;
+                case 'BYYEARDAY':
+                    $this->byYearDay = (array) $value;
                     foreach ($this->byYearDay as $byYearDay) {
-                        if (!is_numeric($byYearDay) || (int)$byYearDay < -366 || (int)$byYearDay == 0 || (int)$byYearDay > 366) {
+                        if (!is_numeric($byYearDay) || (int) $byYearDay < -366 || 0 == (int) $byYearDay || (int) $byYearDay > 366) {
                             throw new InvalidDataException('BYYEARDAY in RRULE must have value(s) from 1 to 366, or -366 to -1!');
                         }
                     }
                     break;
 
-                case 'BYWEEKNO' :
-                    $this->byWeekNo = (array)$value;
+                case 'BYWEEKNO':
+                    $this->byWeekNo = (array) $value;
                     foreach ($this->byWeekNo as $byWeekNo) {
-                        if (!is_numeric($byWeekNo) || (int)$byWeekNo < -53 || (int)$byWeekNo == 0 || (int)$byWeekNo > 53) {
+                        if (!is_numeric($byWeekNo) || (int) $byWeekNo < -53 || 0 == (int) $byWeekNo || (int) $byWeekNo > 53) {
                             throw new InvalidDataException('BYWEEKNO in RRULE must have value(s) from 1 to 53, or -53 to -1!');
                         }
                     }
                     break;
 
-                case 'BYMONTH' :
-                    $this->byMonth = (array)$value;
+                case 'BYMONTH':
+                    $this->byMonth = (array) $value;
                     foreach ($this->byMonth as $byMonth) {
-                        if (!is_numeric($byMonth) || (int)$byMonth < 1 || (int)$byMonth > 12) {
+                        if (!is_numeric($byMonth) || (int) $byMonth < 1 || (int) $byMonth > 12) {
                             throw new InvalidDataException('BYMONTH in RRULE must have value(s) betweeen 1 and 12!');
                         }
                     }
                     break;
 
-                case 'BYSETPOS' :
-                    $this->bySetPos = (array)$value;
+                case 'BYSETPOS':
+                    $this->bySetPos = (array) $value;
                     break;
 
-                case 'WKST' :
+                case 'WKST':
                     $this->weekStart = strtoupper($value);
                     break;
 
                 default:
-                    throw new InvalidDataException('Not supported: ' . strtoupper($key));
-
+                    throw new InvalidDataException('Not supported: '.strtoupper($key));
             }
-
         }
-
     }
 
     /**
@@ -852,77 +802,75 @@ class RRuleIterator implements Iterator {
      *
      * @return array
      */
-    protected function getMonthlyOccurrences() {
-
+    protected function getMonthlyOccurrences()
+    {
         $startDate = clone $this->currentDate;
 
         $byDayResults = [];
 
         // Our strategy is to simply go through the byDays, advance the date to
         // that point and add it to the results.
-        if ($this->byDay) foreach ($this->byDay as $day) {
-
-            $dayName = $this->dayNames[$this->dayMap[substr($day, -2)]];
-
-
-            // Dayname will be something like 'wednesday'. Now we need to find
-            // all wednesdays in this month.
-            $dayHits = [];
-
-            // workaround for missing 'first day of the month' support in hhvm
-            $checkDate = new \DateTime($startDate->format('Y-m-1'));
-            // workaround modify always advancing the date even if the current day is a $dayName in hhvm
-            if ($checkDate->format('l') !== $dayName) {
-                $checkDate = $checkDate->modify($dayName);
-            }
+        if ($this->byDay) {
+            foreach ($this->byDay as $day) {
+                $dayName = $this->dayNames[$this->dayMap[substr($day, -2)]];
+
+                // Dayname will be something like 'wednesday'. Now we need to find
+                // all wednesdays in this month.
+                $dayHits = [];
+
+                // workaround for missing 'first day of the month' support in hhvm
+                $checkDate = new \DateTime($startDate->format('Y-m-1'));
+                // workaround modify always advancing the date even if the current day is a $dayName in hhvm
+                if ($checkDate->format('l') !== $dayName) {
+                    $checkDate = $checkDate->modify($dayName);
+                }
 
-            do {
-                $dayHits[] = $checkDate->format('j');
-                $checkDate = $checkDate->modify('next ' . $dayName);
-            } while ($checkDate->format('n') === $startDate->format('n'));
-
-            // So now we have 'all wednesdays' for month. It is however
-            // possible that the user only really wanted the 1st, 2nd or last
-            // wednesday.
-            if (strlen($day) > 2) {
-                $offset = (int)substr($day, 0, -2);
-
-                if ($offset > 0) {
-                    // It is possible that the day does not exist, such as a
-                    // 5th or 6th wednesday of the month.
-                    if (isset($dayHits[$offset - 1])) {
-                        $byDayResults[] = $dayHits[$offset - 1];
+                do {
+                    $dayHits[] = $checkDate->format('j');
+                    $checkDate = $checkDate->modify('next '.$dayName);
+                } while ($checkDate->format('n') === $startDate->format('n'));
+
+                // So now we have 'all wednesdays' for month. It is however
+                // possible that the user only really wanted the 1st, 2nd or last
+                // wednesday.
+                if (strlen($day) > 2) {
+                    $offset = (int) substr($day, 0, -2);
+
+                    if ($offset > 0) {
+                        // It is possible that the day does not exist, such as a
+                        // 5th or 6th wednesday of the month.
+                        if (isset($dayHits[$offset - 1])) {
+                            $byDayResults[] = $dayHits[$offset - 1];
+                        }
+                    } else {
+                        // if it was negative we count from the end of the array
+                        // might not exist, fx. -5th tuesday
+                        if (isset($dayHits[count($dayHits) + $offset])) {
+                            $byDayResults[] = $dayHits[count($dayHits) + $offset];
+                        }
                     }
                 } else {
-
-                    // if it was negative we count from the end of the array
-                    // might not exist, fx. -5th tuesday
-                    if (isset($dayHits[count($dayHits) + $offset])) {
-                        $byDayResults[] = $dayHits[count($dayHits) + $offset];
-                    }
+                    // There was no counter (first, second, last wednesdays), so we
+                    // just need to add the all to the list).
+                    $byDayResults = array_merge($byDayResults, $dayHits);
                 }
-            } else {
-                // There was no counter (first, second, last wednesdays), so we
-                // just need to add the all to the list).
-                $byDayResults = array_merge($byDayResults, $dayHits);
-
             }
-
         }
 
         $byMonthDayResults = [];
-        if ($this->byMonthDay) foreach ($this->byMonthDay as $monthDay) {
-
-            // Removing values that are out of range for this month
-            if ($monthDay > $startDate->format('t') ||
+        if ($this->byMonthDay) {
+            foreach ($this->byMonthDay as $monthDay) {
+                // Removing values that are out of range for this month
+                if ($monthDay > $startDate->format('t') ||
                 $monthDay < 0 - $startDate->format('t')) {
                     continue;
-            }
-            if ($monthDay > 0) {
-                $byMonthDayResults[] = $monthDay;
-            } else {
-                // Negative values
-                $byMonthDayResults[] = $startDate->format('t') + 1 + $monthDay;
+                }
+                if ($monthDay > 0) {
+                    $byMonthDayResults[] = $monthDay;
+                } else {
+                    // Negative values
+                    $byMonthDayResults[] = $startDate->format('t') + 1 + $monthDay;
+                }
             }
         }
 
@@ -947,7 +895,6 @@ class RRuleIterator implements Iterator {
 
         $filteredResult = [];
         foreach ($this->bySetPos as $setPos) {
-
             if ($setPos < 0) {
                 $setPos = count($result) + ($setPos + 1);
             }
@@ -957,8 +904,8 @@ class RRuleIterator implements Iterator {
         }
 
         sort($filteredResult, SORT_NUMERIC);
-        return $filteredResult;
 
+        return $filteredResult;
     }
 
     /**
@@ -976,8 +923,8 @@ class RRuleIterator implements Iterator {
         'SA' => 6,
     ];
 
-    protected function getHours() {
-
+    protected function getHours()
+    {
         $recurrenceHours = [];
         foreach ($this->byHour as $byHour) {
             $recurrenceHours[] = $byHour;
@@ -986,23 +933,21 @@ class RRuleIterator implements Iterator {
         return $recurrenceHours;
     }
 
-    protected function getDays() {
-
+    protected function getDays()
+    {
         $recurrenceDays = [];
         foreach ($this->byDay as $byDay) {
-
             // The day may be preceeded with a positive (+n) or
             // negative (-n) integer. However, this does not make
             // sense in 'weekly' so we ignore it here.
             $recurrenceDays[] = $this->dayMap[substr($byDay, -2)];
-
         }
 
         return $recurrenceDays;
     }
 
-    protected function getMonths() {
-
+    protected function getMonths()
+    {
         $recurrenceMonths = [];
         foreach ($this->byMonth as $byMonth) {
             $recurrenceMonths[] = $byMonth;
diff --git a/vendor/sabre/vobject/lib/Settings.php b/vendor/sabre/vobject/lib/Settings.php
index 3f274ba8e..afc586b0c 100644
--- a/vendor/sabre/vobject/lib/Settings.php
+++ b/vendor/sabre/vobject/lib/Settings.php
@@ -15,8 +15,8 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Settings {
-
+class Settings
+{
     /**
      * The minimum date we accept for various calculations with dates, such as
      * recurrences.
@@ -25,7 +25,7 @@ class Settings {
      * use-cases. In particular, it covers birthdates for virtually everyone
      * alive on earth, which is less than 5 people at the time of writing.
      */
-    static $minDate = '1900-01-01';
+    public static $minDate = '1900-01-01';
 
     /**
      * The maximum date we accept for various calculations with dates, such as
@@ -34,7 +34,7 @@ class Settings {
      * The choice of 2100 is pretty arbitrary, but should cover most
      * appointments made for many years to come.
      */
-    static $maxDate = '2100-01-01';
+    public static $maxDate = '2100-01-01';
 
     /**
      * The maximum number of recurrences that will be generated.
@@ -51,6 +51,5 @@ class Settings {
      *
      * Set this value to -1 to disable this control altogether.
      */
-    static $maxRecurrences = 3500;
-
+    public static $maxRecurrences = 3500;
 }
diff --git a/vendor/sabre/vobject/lib/Splitter/ICalendar.php b/vendor/sabre/vobject/lib/Splitter/ICalendar.php
index c0007ba01..d42566194 100644
--- a/vendor/sabre/vobject/lib/Splitter/ICalendar.php
+++ b/vendor/sabre/vobject/lib/Splitter/ICalendar.php
@@ -19,8 +19,8 @@ use Sabre\VObject\Component\VCalendar;
  * @author Armin Hackmann
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ICalendar implements SplitterInterface {
-
+class ICalendar implements SplitterInterface
+{
     /**
      * Timezones.
      *
@@ -38,13 +38,13 @@ class ICalendar implements SplitterInterface {
     /**
      * Constructor.
      *
-     * The splitter should receive an readable file stream as it's input.
+     * The splitter should receive an readable file stream as its input.
      *
      * @param resource $input
-     * @param int $options Parser options, see the OPTIONS constants.
+     * @param int      $options parser options, see the OPTIONS constants
      */
-    function __construct($input, $options = 0) {
-
+    public function __construct($input, $options = 0)
+    {
         $data = VObject\Reader::read($input, $options);
 
         if (!$data instanceof VObject\Component\VCalendar) {
@@ -57,16 +57,16 @@ class ICalendar implements SplitterInterface {
             }
 
             // Get all timezones
-            if ($component->name === 'VTIMEZONE') {
-                $this->vtimezones[(string)$component->TZID] = $component;
+            if ('VTIMEZONE' === $component->name) {
+                $this->vtimezones[(string) $component->TZID] = $component;
                 continue;
             }
 
             // Get component UID for recurring Events search
             if (!$component->UID) {
-                $component->UID = sha1(microtime()) . '-vobjectimport';
+                $component->UID = sha1(microtime()).'-vobjectimport';
             }
-            $uid = (string)$component->UID;
+            $uid = (string) $component->UID;
 
             // Take care of recurring events
             if (!array_key_exists($uid, $this->objects)) {
@@ -75,7 +75,6 @@ class ICalendar implements SplitterInterface {
 
             $this->objects[$uid]->add(clone $component);
         }
-
     }
 
     /**
@@ -84,15 +83,14 @@ class ICalendar implements SplitterInterface {
      *
      * When the end is reached, null will be returned.
      *
-     * @return Sabre\VObject\Component|null
+     * @return \Sabre\VObject\Component|null
      */
-    function getNext() {
-
+    public function getNext()
+    {
         if ($object = array_shift($this->objects)) {
-
             // create our baseobject
             $object->version = '2.0';
-            $object->prodid = '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN';
+            $object->prodid = '-//Sabre//Sabre VObject '.VObject\Version::VERSION.'//EN';
             $object->calscale = 'GREGORIAN';
 
             // add vtimezone information to obj (if we have it)
@@ -101,13 +99,8 @@ class ICalendar implements SplitterInterface {
             }
 
             return $object;
-
         } else {
-
             return;
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/Splitter/SplitterInterface.php b/vendor/sabre/vobject/lib/Splitter/SplitterInterface.php
index 8f827cc4b..c845ac5fc 100644
--- a/vendor/sabre/vobject/lib/Splitter/SplitterInterface.php
+++ b/vendor/sabre/vobject/lib/Splitter/SplitterInterface.php
@@ -15,16 +15,16 @@ namespace Sabre\VObject\Splitter;
  * @author Dominik Tobschall (http://tobschall.de/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface SplitterInterface {
-
+interface SplitterInterface
+{
     /**
      * Constructor.
      *
-     * The splitter should receive an readable file stream as it's input.
+     * The splitter should receive an readable file stream as its input.
      *
      * @param resource $input
      */
-    function __construct($input);
+    public function __construct($input);
 
     /**
      * Every time getNext() is called, a new object will be parsed, until we
@@ -32,8 +32,7 @@ interface SplitterInterface {
      *
      * When the end is reached, null will be returned.
      *
-     * @return Sabre\VObject\Component|null
+     * @return \Sabre\VObject\Component|null
      */
-    function getNext();
-
+    public function getNext();
 }
diff --git a/vendor/sabre/vobject/lib/Splitter/VCard.php b/vendor/sabre/vobject/lib/Splitter/VCard.php
index 0bb82abe9..a20f5c2c1 100644
--- a/vendor/sabre/vobject/lib/Splitter/VCard.php
+++ b/vendor/sabre/vobject/lib/Splitter/VCard.php
@@ -19,8 +19,8 @@ use Sabre\VObject\Parser\MimeDir;
  * @author Armin Hackmann
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VCard implements SplitterInterface {
-
+class VCard implements SplitterInterface
+{
     /**
      * File handle.
      *
@@ -38,16 +38,15 @@ class VCard implements SplitterInterface {
     /**
      * Constructor.
      *
-     * The splitter should receive an readable file stream as it's input.
+     * The splitter should receive an readable file stream as its input.
      *
      * @param resource $input
-     * @param int $options Parser options, see the OPTIONS constants.
+     * @param int      $options parser options, see the OPTIONS constants
      */
-    function __construct($input, $options = 0) {
-
+    public function __construct($input, $options = 0)
+    {
         $this->input = $input;
         $this->parser = new MimeDir($input, $options);
-
     }
 
     /**
@@ -56,23 +55,20 @@ class VCard implements SplitterInterface {
      *
      * When the end is reached, null will be returned.
      *
-     * @return Sabre\VObject\Component|null
+     * @return \Sabre\VObject\Component|null
      */
-    function getNext() {
-
+    public function getNext()
+    {
         try {
             $object = $this->parser->parse();
 
             if (!$object instanceof VObject\Component\VCard) {
                 throw new VObject\ParseException('The supplied input contained non-VCARD data.');
             }
-
         } catch (VObject\EofException $e) {
             return;
         }
 
         return $object;
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/StringUtil.php b/vendor/sabre/vobject/lib/StringUtil.php
index b8615f2ba..2333d6ab9 100644
--- a/vendor/sabre/vobject/lib/StringUtil.php
+++ b/vendor/sabre/vobject/lib/StringUtil.php
@@ -9,8 +9,8 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class StringUtil {
-
+class StringUtil
+{
     /**
      * Returns true or false depending on if a string is valid UTF-8.
      *
@@ -18,15 +18,14 @@ class StringUtil {
      *
      * @return bool
      */
-    static function isUTF8($str) {
-
+    public static function isUTF8($str)
+    {
         // Control characters
         if (preg_match('%[\x00-\x08\x0B-\x0C\x0E\x0F]%', $str)) {
             return false;
         }
 
-        return (bool)preg_match('%%u', $str);
-
+        return (bool) preg_match('%%u', $str);
     }
 
     /**
@@ -39,12 +38,12 @@ class StringUtil {
      *
      * @return string
      */
-    static function convertToUTF8($str) {
-
+    public static function convertToUTF8($str)
+    {
         $encoding = mb_detect_encoding($str, ['UTF-8', 'ISO-8859-1', 'WINDOWS-1252'], true);
 
         switch ($encoding) {
-            case 'ISO-8859-1' :
+            case 'ISO-8859-1':
                 $newStr = utf8_encode($str);
                 break;
             /* Unreachable code. Not sure yet how we can improve this
@@ -53,14 +52,11 @@ class StringUtil {
                 $newStr = iconv('cp1252', 'UTF-8', $str);
                 break;
              */
-            default :
+            default:
                  $newStr = $str;
-
         }
 
         // Removing any control characters
-        return (preg_replace('%(?:[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F])%', '', $newStr));
-
+        return preg_replace('%(?:[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F])%', '', $newStr);
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/TimeZoneUtil.php b/vendor/sabre/vobject/lib/TimeZoneUtil.php
index 925183e8d..5b1a775c2 100644
--- a/vendor/sabre/vobject/lib/TimeZoneUtil.php
+++ b/vendor/sabre/vobject/lib/TimeZoneUtil.php
@@ -12,30 +12,30 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class TimeZoneUtil {
-
-    static $map = null;
+class TimeZoneUtil
+{
+    public static $map = null;
 
     /**
      * List of microsoft exchange timezone ids.
      *
      * Source: http://msdn.microsoft.com/en-us/library/aa563018(loband).aspx
      */
-    static $microsoftExchangeMap = [
-        0  => 'UTC',
+    public static $microsoftExchangeMap = [
+        0 => 'UTC',
         31 => 'Africa/Casablanca',
 
         // Insanely, id #2 is used for both Europe/Lisbon, and Europe/Sarajevo.
         // I'm not even kidding.. We handle this special case in the
         // getTimeZone method.
-        2  => 'Europe/Lisbon',
-        1  => 'Europe/London',
-        4  => 'Europe/Berlin',
-        6  => 'Europe/Prague',
-        3  => 'Europe/Paris',
+        2 => 'Europe/Lisbon',
+        1 => 'Europe/London',
+        4 => 'Europe/Berlin',
+        6 => 'Europe/Prague',
+        3 => 'Europe/Paris',
         69 => 'Africa/Luanda', // This was a best guess
-        7  => 'Europe/Athens',
-        5  => 'Europe/Bucharest',
+        7 => 'Europe/Athens',
+        5 => 'Europe/Bucharest',
         49 => 'Africa/Cairo',
         50 => 'Africa/Harare',
         59 => 'Europe/Helsinki',
@@ -117,13 +117,13 @@ class TimeZoneUtil {
      * Alternatively, if $failIfUncertain is set to true, it will throw an
      * exception if we cannot accurately determine the timezone.
      *
-     * @param string $tzid
+     * @param string                  $tzid
      * @param Sabre\VObject\Component $vcalendar
      *
-     * @return DateTimeZone
+     * @return \DateTimeZone
      */
-    static function getTimeZone($tzid, Component $vcalendar = null, $failIfUncertain = false) {
-
+    public static function getTimeZone($tzid, Component $vcalendar = null, $failIfUncertain = false)
+    {
         // First we will just see if the tzid is a support timezone identifier.
         //
         // The only exception is if the timezone starts with (. This is to
@@ -135,8 +135,7 @@ class TimeZoneUtil {
         // Since PHP 5.5.10, the first bit will be used as the timezone and
         // this method will return just GMT+01:00. This is wrong, because it
         // doesn't take DST into account.
-        if ($tzid[0] !== '(') {
-
+        if ('(' !== $tzid[0]) {
             // PHP has a bug that logs PHP warnings even it shouldn't:
             // https://bugs.php.net/bug.php?id=67881
             //
@@ -155,7 +154,6 @@ class TimeZoneUtil {
                 }
             } catch (\Exception $e) {
             }
-
         }
 
         self::loadTzMaps();
@@ -178,46 +176,40 @@ class TimeZoneUtil {
         // Maybe the author was hyper-lazy and just included an offset. We
         // support it, but we aren't happy about it.
         if (preg_match('/^GMT(\+|-)([0-9]{4})$/', $tzid, $matches)) {
-
             // Note that the path in the source will never be taken from PHP 5.5.10
             // onwards. PHP 5.5.10 supports the "GMT+0100" style of format, so it
             // already gets returned early in this function. Once we drop support
             // for versions under PHP 5.5.10, this bit can be taken out of the
             // source.
             // @codeCoverageIgnoreStart
-            return new \DateTimeZone('Etc/GMT' . $matches[1] . ltrim(substr($matches[2], 0, 2), '0'));
+            return new \DateTimeZone('Etc/GMT'.$matches[1].ltrim(substr($matches[2], 0, 2), '0'));
             // @codeCoverageIgnoreEnd
         }
 
         if ($vcalendar) {
-
             // If that didn't work, we will scan VTIMEZONE objects
             foreach ($vcalendar->select('VTIMEZONE') as $vtimezone) {
-
-                if ((string)$vtimezone->TZID === $tzid) {
-
+                if ((string) $vtimezone->TZID === $tzid) {
                     // Some clients add 'X-LIC-LOCATION' with the olson name.
                     if (isset($vtimezone->{'X-LIC-LOCATION'})) {
-
-                        $lic = (string)$vtimezone->{'X-LIC-LOCATION'};
+                        $lic = (string) $vtimezone->{'X-LIC-LOCATION'};
 
                         // Libical generators may specify strings like
                         // "SystemV/EST5EDT". For those we must remove the
                         // SystemV part.
-                        if (substr($lic, 0, 8) === 'SystemV/') {
+                        if ('SystemV/' === substr($lic, 0, 8)) {
                             $lic = substr($lic, 8);
                         }
 
                         return self::getTimeZone($lic, null, $failIfUncertain);
-
                     }
                     // Microsoft may add a magic number, which we also have an
                     // answer for.
                     if (isset($vtimezone->{'X-MICROSOFT-CDO-TZID'})) {
-                        $cdoId = (int)$vtimezone->{'X-MICROSOFT-CDO-TZID'}->getValue();
+                        $cdoId = (int) $vtimezone->{'X-MICROSOFT-CDO-TZID'}->getValue();
 
                         // 2 can mean both Europe/Lisbon and Europe/Sarajevo.
-                        if ($cdoId === 2 && strpos((string)$vtimezone->TZID, 'Sarajevo') !== false) {
+                        if (2 === $cdoId && false !== strpos((string) $vtimezone->TZID, 'Sarajevo')) {
                             return new \DateTimeZone('Europe/Sarajevo');
                         }
 
@@ -225,37 +217,34 @@ class TimeZoneUtil {
                             return new \DateTimeZone(self::$microsoftExchangeMap[$cdoId]);
                         }
                     }
-
                 }
-
             }
-
         }
 
         if ($failIfUncertain) {
-            throw new \InvalidArgumentException('We were unable to determine the correct PHP timezone for tzid: ' . $tzid);
+            throw new \InvalidArgumentException('We were unable to determine the correct PHP timezone for tzid: '.$tzid);
         }
 
         // If we got all the way here, we default to UTC.
         return new \DateTimeZone(date_default_timezone_get());
-
     }
 
     /**
      * This method will load in all the tz mapping information, if it's not yet
      * done.
      */
-    static function loadTzMaps() {
-
-        if (!is_null(self::$map)) return;
+    public static function loadTzMaps()
+    {
+        if (!is_null(self::$map)) {
+            return;
+        }
 
         self::$map = array_merge(
-            include __DIR__ . '/timezonedata/windowszones.php',
-            include __DIR__ . '/timezonedata/lotuszones.php',
-            include __DIR__ . '/timezonedata/exchangezones.php',
-            include __DIR__ . '/timezonedata/php-workaround.php'
+            include __DIR__.'/timezonedata/windowszones.php',
+            include __DIR__.'/timezonedata/lotuszones.php',
+            include __DIR__.'/timezonedata/exchangezones.php',
+            include __DIR__.'/timezonedata/php-workaround.php'
         );
-
     }
 
     /**
@@ -269,8 +258,8 @@ class TimeZoneUtil {
      *
      * @return array
      */
-    static function getIdentifiersBC() {
-        return include __DIR__ . '/timezonedata/php-bc.php';
+    public static function getIdentifiersBC()
+    {
+        return include __DIR__.'/timezonedata/php-bc.php';
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/UUIDUtil.php b/vendor/sabre/vobject/lib/UUIDUtil.php
index 24ebe3cf8..066af624c 100644
--- a/vendor/sabre/vobject/lib/UUIDUtil.php
+++ b/vendor/sabre/vobject/lib/UUIDUtil.php
@@ -13,8 +13,8 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class UUIDUtil {
-
+class UUIDUtil
+{
     /**
      * Returns a pseudo-random v4 UUID.
      *
@@ -24,10 +24,9 @@ class UUIDUtil {
      *
      * @return string
      */
-    static function getUUID() {
-
+    public static function getUUID()
+    {
         return sprintf(
-
             '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
 
             // 32 bits for "time_low"
@@ -57,13 +56,11 @@ class UUIDUtil {
      *
      * @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/vobject/lib/VCardConverter.php b/vendor/sabre/vobject/lib/VCardConverter.php
index 1f6d016f1..156b83b4e 100644
--- a/vendor/sabre/vobject/lib/VCardConverter.php
+++ b/vendor/sabre/vobject/lib/VCardConverter.php
@@ -9,8 +9,8 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class VCardConverter {
-
+class VCardConverter
+{
     /**
      * Converts a vCard object to a new version.
      *
@@ -27,10 +27,10 @@ class VCardConverter {
      * If input and output version are identical, a clone is returned.
      *
      * @param Component\VCard $input
-     * @param int $targetVersion
+     * @param int             $targetVersion
      */
-    function convert(Component\VCard $input, $targetVersion) {
-
+    public function convert(Component\VCard $input, $targetVersion)
+    {
         $inputVersion = $input->getDocumentType();
         if ($inputVersion === $targetVersion) {
             return clone $input;
@@ -43,7 +43,7 @@ class VCardConverter {
             throw new \InvalidArgumentException('You can only use vCard 3.0 or 4.0 for the target version');
         }
 
-        $newVersion = $targetVersion === Document::VCARD40 ? '4.0' : '3.0';
+        $newVersion = Document::VCARD40 === $targetVersion ? '4.0' : '3.0';
 
         $output = new Component\VCard([
             'VERSION' => $newVersion,
@@ -53,13 +53,10 @@ class VCardConverter {
         unset($output->UID);
 
         foreach ($input->children() as $property) {
-
             $this->convertProperty($input, $output, $property, $targetVersion);
-
         }
 
         return $output;
-
     }
 
     /**
@@ -67,13 +64,11 @@ class VCardConverter {
      *
      * @param Component\VCard $input
      * @param Component\VCard $output
-     * @param Property $property
-     * @param int $targetVersion
-     *
-     * @return void
+     * @param Property        $property
+     * @param int             $targetVersion
      */
-    protected function convertProperty(Component\VCard $input, Component\VCard $output, Property $property, $targetVersion) {
-
+    protected function convertProperty(Component\VCard $input, Component\VCard $output, Property $property, $targetVersion)
+    {
         // Skipping these, those are automatically added.
         if (in_array($property->name, ['VERSION', 'PRODID'])) {
             return;
@@ -95,15 +90,10 @@ class VCardConverter {
             $valueType
         );
 
-
-        if ($targetVersion === Document::VCARD30) {
-
+        if (Document::VCARD30 === $targetVersion) {
             if ($property instanceof Property\Uri && in_array($property->name, ['PHOTO', 'LOGO', 'SOUND'])) {
-
                 $newProperty = $this->convertUriToBinary($output, $newProperty);
-
             } elseif ($property instanceof Property\VCard\DateAndOrTime) {
-
                 // In vCard 4, the birth year may be optional. This is not the
                 // case for vCard 3. Apple has a workaround for this that
                 // allows applications that support Apple's extension still
@@ -113,12 +103,12 @@ class VCardConverter {
                 // uses.
                 $parts = DateTimeParser::parseVCardDateTime($property->getValue());
                 if (is_null($parts['year'])) {
-                    $newValue = '1604-' . $parts['month'] . '-' . $parts['date'];
+                    $newValue = '1604-'.$parts['month'].'-'.$parts['date'];
                     $newProperty->setValue($newValue);
                     $newProperty['X-APPLE-OMIT-YEAR'] = '1604';
                 }
 
-                if ($newProperty->name == 'ANNIVERSARY') {
+                if ('ANNIVERSARY' == $newProperty->name) {
                     // Microsoft non-standard anniversary
                     $newProperty->name = 'X-ANNIVERSARY';
 
@@ -127,74 +117,64 @@ class VCardConverter {
                     // group, so we first need to find a groupname that doesn't
                     // exist yet.
                     $x = 1;
-                    while ($output->select('ITEM' . $x . '.')) {
-                        $x++;
+                    while ($output->select('ITEM'.$x.'.')) {
+                        ++$x;
                     }
-                    $output->add('ITEM' . $x . '.X-ABDATE', $newProperty->getValue(), ['VALUE' => 'DATE-AND-OR-TIME']);
-                    $output->add('ITEM' . $x . '.X-ABLABEL', '_$!<Anniversary>!$_');
+                    $output->add('ITEM'.$x.'.X-ABDATE', $newProperty->getValue(), ['VALUE' => 'DATE-AND-OR-TIME']);
+                    $output->add('ITEM'.$x.'.X-ABLABEL', '_$!<Anniversary>!$_');
                 }
-
-            } elseif ($property->name === 'KIND') {
-
+            } elseif ('KIND' === $property->name) {
                 switch (strtolower($property->getValue())) {
-                    case 'org' :
+                    case 'org':
                         // vCard 3.0 does not have an equivalent to KIND:ORG,
                         // but apple has an extension that means the same
                         // thing.
                         $newProperty = $output->createProperty('X-ABSHOWAS', 'COMPANY');
                         break;
 
-                    case 'individual' :
+                    case 'individual':
                         // Individual is implicit, so we skip it.
                         return;
 
-                    case 'group' :
+                    case 'group':
                         // OS X addressbook property
                         $newProperty = $output->createProperty('X-ADDRESSBOOKSERVER-KIND', 'GROUP');
                         break;
                 }
-
-
             }
-
-        } elseif ($targetVersion === Document::VCARD40) {
-
+        } elseif (Document::VCARD40 === $targetVersion) {
             // These properties were removed in vCard 4.0
             if (in_array($property->name, ['NAME', 'MAILER', 'LABEL', 'CLASS'])) {
                 return;
             }
 
             if ($property instanceof Property\Binary) {
-
                 $newProperty = $this->convertBinaryToUri($output, $newProperty, $parameters);
-
             } elseif ($property instanceof Property\VCard\DateAndOrTime && isset($parameters['X-APPLE-OMIT-YEAR'])) {
-
                 // If a property such as BDAY contained 'X-APPLE-OMIT-YEAR',
                 // then we're stripping the year from the vcard 4 value.
                 $parts = DateTimeParser::parseVCardDateTime($property->getValue());
                 if ($parts['year'] === $property['X-APPLE-OMIT-YEAR']->getValue()) {
-                    $newValue = '--' . $parts['month'] . '-' . $parts['date'];
+                    $newValue = '--'.$parts['month'].'-'.$parts['date'];
                     $newProperty->setValue($newValue);
                 }
 
                 // Regardless if the year matched or not, we do need to strip
                 // X-APPLE-OMIT-YEAR.
                 unset($parameters['X-APPLE-OMIT-YEAR']);
-
             }
             switch ($property->name) {
-                case 'X-ABSHOWAS' :
-                    if (strtoupper($property->getValue()) === 'COMPANY') {
+                case 'X-ABSHOWAS':
+                    if ('COMPANY' === strtoupper($property->getValue())) {
                         $newProperty = $output->createProperty('KIND', 'ORG');
                     }
                     break;
-                case 'X-ADDRESSBOOKSERVER-KIND' :
-                    if (strtoupper($property->getValue()) === 'GROUP') {
+                case 'X-ADDRESSBOOKSERVER-KIND':
+                    if ('GROUP' === strtoupper($property->getValue())) {
                         $newProperty = $output->createProperty('KIND', 'GROUP');
                     }
                     break;
-                case 'X-ANNIVERSARY' :
+                case 'X-ANNIVERSARY':
                     $newProperty->name = 'ANNIVERSARY';
                     // If we already have an anniversary property with the same
                     // value, ignore.
@@ -204,15 +184,15 @@ class VCardConverter {
                         }
                     }
                     break;
-                case 'X-ABDATE' :
+                case 'X-ABDATE':
                     // Find out what the label was, if it exists.
                     if (!$property->group) {
                         break;
                     }
-                    $label = $input->{$property->group . '.X-ABLABEL'};
+                    $label = $input->{$property->group.'.X-ABLABEL'};
 
                     // We only support converting anniversaries.
-                    if (!$label || $label->getValue() !== '_$!<Anniversary>!$_') {
+                    if (!$label || '_$!<Anniversary>!$_' !== $label->getValue()) {
                         break;
                     }
 
@@ -226,22 +206,20 @@ class VCardConverter {
                     $newProperty->name = 'ANNIVERSARY';
                     break;
                 // Apple's per-property label system.
-                case 'X-ABLABEL' :
-                    if ($newProperty->getValue() === '_$!<Anniversary>!$_') {
+                case 'X-ABLABEL':
+                    if ('_$!<Anniversary>!$_' === $newProperty->getValue()) {
                         // We can safely remove these, as they are converted to
                         // ANNIVERSARY properties.
                         return;
                     }
                     break;
-
             }
-
         }
 
         // set property group
         $newProperty->group = $property->group;
 
-        if ($targetVersion === Document::VCARD40) {
+        if (Document::VCARD40 === $targetVersion) {
             $this->convertParameters40($newProperty, $parameters);
         } else {
             $this->convertParameters30($newProperty, $parameters);
@@ -257,8 +235,6 @@ class VCardConverter {
         }
 
         $output->add($newProperty);
-
-
     }
 
     /**
@@ -267,14 +243,14 @@ class VCardConverter {
      * vCard 4.0 no longer supports BINARY properties.
      *
      * @param Component\VCard $output
-     * @param Property\Uri $property The input property.
-     * @param $parameters List of parameters that will eventually be added to
-     *                    the new property.
+     * @param Property\Uri    $property the input property
+     * @param $parameters list of parameters that will eventually be added to
+     *                    the new property
      *
      * @return Property\Uri
      */
-    protected function convertBinaryToUri(Component\VCard $output, Property\Binary $newProperty, array &$parameters) {
-
+    protected function convertBinaryToUri(Component\VCard $output, Property\Binary $newProperty, array &$parameters)
+    {
         $value = $newProperty->getValue();
         $newProperty = $output->createProperty(
             $newProperty->name,
@@ -287,14 +263,13 @@ class VCardConverter {
 
         // See if we can find a better mimetype.
         if (isset($parameters['TYPE'])) {
-
             $newTypes = [];
             foreach ($parameters['TYPE']->getParts() as $typePart) {
                 if (in_array(
                     strtoupper($typePart),
                     ['JPEG', 'PNG', 'GIF']
                 )) {
-                    $mimeType = 'image/' . strtolower($typePart);
+                    $mimeType = 'image/'.strtolower($typePart);
                 } else {
                     $newTypes[] = $typePart;
                 }
@@ -307,12 +282,11 @@ class VCardConverter {
             } else {
                 unset($parameters['TYPE']);
             }
-
         }
 
-        $newProperty->setValue('data:' . $mimeType . ';base64,' . base64_encode($value));
-        return $newProperty;
+        $newProperty->setValue('data:'.$mimeType.';base64,'.base64_encode($value));
 
+        return $newProperty;
     }
 
     /**
@@ -323,16 +297,16 @@ class VCardConverter {
      * possible, to improve compatibility.
      *
      * @param Component\VCard $output
-     * @param Property\Uri $property The input property.
+     * @param Property\Uri    $property the input property
      *
      * @return Property\Binary|null
      */
-    protected function convertUriToBinary(Component\VCard $output, Property\Uri $newProperty) {
-
+    protected function convertUriToBinary(Component\VCard $output, Property\Uri $newProperty)
+    {
         $value = $newProperty->getValue();
 
         // Only converting data: uris
-        if (substr($value, 0, 5) !== 'data:') {
+        if ('data:' !== substr($value, 0, 5)) {
             return $newProperty;
         }
 
@@ -354,92 +328,79 @@ class VCardConverter {
 
         $newProperty['ENCODING'] = 'b';
         switch ($mimeType) {
-
-            case 'image/jpeg' :
+            case 'image/jpeg':
                 $newProperty['TYPE'] = 'JPEG';
                 break;
-            case 'image/png' :
+            case 'image/png':
                 $newProperty['TYPE'] = 'PNG';
                 break;
-            case 'image/gif' :
+            case 'image/gif':
                 $newProperty['TYPE'] = 'GIF';
                 break;
-
         }
 
-
         return $newProperty;
-
     }
 
     /**
      * Adds parameters to a new property for vCard 4.0.
      *
      * @param Property $newProperty
-     * @param array $parameters
-     *
-     * @return void
+     * @param array    $parameters
      */
-    protected function convertParameters40(Property $newProperty, array $parameters) {
-
+    protected function convertParameters40(Property $newProperty, array $parameters)
+    {
         // Adding all parameters.
         foreach ($parameters as $param) {
-
             // vCard 2.1 allowed parameters with no name
-            if ($param->noName) $param->noName = false;
+            if ($param->noName) {
+                $param->noName = false;
+            }
 
             switch ($param->name) {
-
                 // We need to see if there's any TYPE=PREF, because in vCard 4
                 // that's now PREF=1.
-                case 'TYPE' :
+                case 'TYPE':
                     foreach ($param->getParts() as $paramPart) {
-
-                        if (strtoupper($paramPart) === 'PREF') {
+                        if ('PREF' === strtoupper($paramPart)) {
                             $newProperty->add('PREF', '1');
                         } else {
                             $newProperty->add($param->name, $paramPart);
                         }
-
                     }
                     break;
                 // These no longer exist in vCard 4
-                case 'ENCODING' :
-                case 'CHARSET' :
+                case 'ENCODING':
+                case 'CHARSET':
                     break;
 
-                default :
+                default:
                     $newProperty->add($param->name, $param->getParts());
                     break;
-
             }
-
         }
-
     }
 
     /**
      * Adds parameters to a new property for vCard 3.0.
      *
      * @param Property $newProperty
-     * @param array $parameters
-     *
-     * @return void
+     * @param array    $parameters
      */
-    protected function convertParameters30(Property $newProperty, array $parameters) {
-
+    protected function convertParameters30(Property $newProperty, array $parameters)
+    {
         // Adding all parameters.
         foreach ($parameters as $param) {
-
             // vCard 2.1 allowed parameters with no name
-            if ($param->noName) $param->noName = false;
+            if ($param->noName) {
+                $param->noName = false;
+            }
 
             switch ($param->name) {
-
-                case 'ENCODING' :
+                case 'ENCODING':
                     // This value only existed in vCard 2.1, and should be
                     // removed for anything else.
-                    if (strtoupper($param->getValue()) !== 'QUOTED-PRINTABLE') {
+                    if ('QUOTED-PRINTABLE' !== strtoupper($param->getValue())) {
                         $newProperty->add($param->name, $param->getParts());
                     }
                     break;
@@ -449,19 +410,16 @@ class VCardConverter {
                  *
                  * Any other PREF numbers we'll drop.
                  */
-                case 'PREF' :
-                    if ($param->getValue() == '1') {
+                case 'PREF':
+                    if ('1' == $param->getValue()) {
                         $newProperty->add('TYPE', 'PREF');
                     }
                     break;
 
-                default :
+                default:
                     $newProperty->add($param->name, $param->getParts());
                     break;
-
             }
-
         }
-
     }
 }
diff --git a/vendor/sabre/vobject/lib/Version.php b/vendor/sabre/vobject/lib/Version.php
index 074b06c4b..257e66a79 100644
--- a/vendor/sabre/vobject/lib/Version.php
+++ b/vendor/sabre/vobject/lib/Version.php
@@ -9,11 +9,10 @@ namespace Sabre\VObject;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Version {
-
+class Version
+{
     /**
      * Full version number.
      */
-    const VERSION = '4.1.6';
-
+    const VERSION = '4.2.0';
 }
diff --git a/vendor/sabre/vobject/lib/Writer.php b/vendor/sabre/vobject/lib/Writer.php
index f8a58758d..c70a6ae4d 100644
--- a/vendor/sabre/vobject/lib/Writer.php
+++ b/vendor/sabre/vobject/lib/Writer.php
@@ -14,8 +14,8 @@ use Sabre\Xml;
  * @author Ivan Enderlin
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Writer {
-
+class Writer
+{
     /**
      * Serializes a vCard or iCalendar object.
      *
@@ -23,24 +23,22 @@ class Writer {
      *
      * @return string
      */
-    static function write(Component $component) {
-
+    public static function write(Component $component)
+    {
         return $component->serialize();
-
     }
 
     /**
      * Serializes a jCal or jCard object.
      *
      * @param Component $component
-     * @param int $options
+     * @param int       $options
      *
      * @return string
      */
-    static function writeJson(Component $component, $options = 0) {
-
+    public static function writeJson(Component $component, $options = 0)
+    {
         return json_encode($component, $options);
-
     }
 
     /**
@@ -50,8 +48,8 @@ class Writer {
      *
      * @return string
      */
-    static function writeXml(Component $component) {
-
+    public static function writeXml(Component $component)
+    {
         $writer = new Xml\Writer();
         $writer->openMemory();
         $writer->setIndent(true);
@@ -59,15 +57,11 @@ class Writer {
         $writer->startDocument('1.0', 'utf-8');
 
         if ($component instanceof Component\VCalendar) {
-
             $writer->startElement('icalendar');
-            $writer->writeAttribute('xmlns', Parser\Xml::XCAL_NAMESPACE);
-
+            $writer->writeAttribute('xmlns', Parser\XML::XCAL_NAMESPACE);
         } else {
-
             $writer->startElement('vcards');
-            $writer->writeAttribute('xmlns', Parser\Xml::XCARD_NAMESPACE);
-
+            $writer->writeAttribute('xmlns', Parser\XML::XCARD_NAMESPACE);
         }
 
         $component->xmlSerialize($writer);
@@ -75,7 +69,5 @@ class Writer {
         $writer->endElement();
 
         return $writer->outputMemory();
-
     }
-
 }
diff --git a/vendor/sabre/vobject/lib/timezonedata/exchangezones.php b/vendor/sabre/vobject/lib/timezonedata/exchangezones.php
index edba5b473..89bddc27c 100644
--- a/vendor/sabre/vobject/lib/timezonedata/exchangezones.php
+++ b/vendor/sabre/vobject/lib/timezonedata/exchangezones.php
@@ -12,83 +12,83 @@
  * @license http://sabre.io/license/ Modified BSD License
  */
 return [
-    'Universal Coordinated Time'                               => 'UTC',
-    'Casablanca, Monrovia'                                     => 'Africa/Casablanca',
-    'Greenwich Mean Time: Dublin, Edinburgh, Lisbon, London'   => 'Europe/Lisbon',
-    'Greenwich Mean Time; Dublin, Edinburgh, London'           => 'Europe/London',
-    'Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna'         => 'Europe/Berlin',
-    'Belgrade, Pozsony, Budapest, Ljubljana, Prague'           => 'Europe/Prague',
-    'Brussels, Copenhagen, Madrid, Paris'                      => 'Europe/Paris',
-    'Paris, Madrid, Brussels, Copenhagen'                      => 'Europe/Paris',
-    'Prague, Central Europe'                                   => 'Europe/Prague',
-    'Sarajevo, Skopje, Sofija, Vilnius, Warsaw, Zagreb'        => 'Europe/Sarajevo',
-    'West Central Africa'                                      => 'Africa/Luanda', // This was a best guess
-    'Athens, Istanbul, Minsk'                                  => 'Europe/Athens',
-    'Bucharest'                                                => 'Europe/Bucharest',
-    'Cairo'                                                    => 'Africa/Cairo',
-    'Harare, Pretoria'                                         => 'Africa/Harare',
-    'Helsinki, Riga, Tallinn'                                  => 'Europe/Helsinki',
-    'Israel, Jerusalem Standard Time'                          => 'Asia/Jerusalem',
-    'Baghdad'                                                  => 'Asia/Baghdad',
-    'Arab, Kuwait, Riyadh'                                     => 'Asia/Kuwait',
-    'Moscow, St. Petersburg, Volgograd'                        => 'Europe/Moscow',
-    'East Africa, Nairobi'                                     => 'Africa/Nairobi',
-    'Tehran'                                                   => 'Asia/Tehran',
-    'Abu Dhabi, Muscat'                                        => 'Asia/Muscat', // Best guess
-    'Baku, Tbilisi, Yerevan'                                   => 'Asia/Baku',
-    'Kabul'                                                    => 'Asia/Kabul',
-    'Ekaterinburg'                                             => 'Asia/Yekaterinburg',
-    'Islamabad, Karachi, Tashkent'                             => 'Asia/Karachi',
+    'Universal Coordinated Time' => 'UTC',
+    'Casablanca, Monrovia' => 'Africa/Casablanca',
+    'Greenwich Mean Time: Dublin, Edinburgh, Lisbon, London' => 'Europe/Lisbon',
+    'Greenwich Mean Time; Dublin, Edinburgh, London' => 'Europe/London',
+    'Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna' => 'Europe/Berlin',
+    'Belgrade, Pozsony, Budapest, Ljubljana, Prague' => 'Europe/Prague',
+    'Brussels, Copenhagen, Madrid, Paris' => 'Europe/Paris',
+    'Paris, Madrid, Brussels, Copenhagen' => 'Europe/Paris',
+    'Prague, Central Europe' => 'Europe/Prague',
+    'Sarajevo, Skopje, Sofija, Vilnius, Warsaw, Zagreb' => 'Europe/Sarajevo',
+    'West Central Africa' => 'Africa/Luanda', // This was a best guess
+    'Athens, Istanbul, Minsk' => 'Europe/Athens',
+    'Bucharest' => 'Europe/Bucharest',
+    'Cairo' => 'Africa/Cairo',
+    'Harare, Pretoria' => 'Africa/Harare',
+    'Helsinki, Riga, Tallinn' => 'Europe/Helsinki',
+    'Israel, Jerusalem Standard Time' => 'Asia/Jerusalem',
+    'Baghdad' => 'Asia/Baghdad',
+    'Arab, Kuwait, Riyadh' => 'Asia/Kuwait',
+    'Moscow, St. Petersburg, Volgograd' => 'Europe/Moscow',
+    'East Africa, Nairobi' => 'Africa/Nairobi',
+    'Tehran' => 'Asia/Tehran',
+    'Abu Dhabi, Muscat' => 'Asia/Muscat', // Best guess
+    'Baku, Tbilisi, Yerevan' => 'Asia/Baku',
+    'Kabul' => 'Asia/Kabul',
+    'Ekaterinburg' => 'Asia/Yekaterinburg',
+    'Islamabad, Karachi, Tashkent' => 'Asia/Karachi',
     'Kolkata, Chennai, Mumbai, New Delhi, India Standard Time' => 'Asia/Calcutta',
-    'Kathmandu, Nepal'                                         => 'Asia/Kathmandu',
-    'Almaty, Novosibirsk, North Central Asia'                  => 'Asia/Almaty',
-    'Astana, Dhaka'                                            => 'Asia/Dhaka',
-    'Sri Jayawardenepura, Sri Lanka'                           => 'Asia/Colombo',
-    'Rangoon'                                                  => 'Asia/Rangoon',
-    'Bangkok, Hanoi, Jakarta'                                  => 'Asia/Bangkok',
-    'Krasnoyarsk'                                              => 'Asia/Krasnoyarsk',
-    'Beijing, Chongqing, Hong Kong SAR, Urumqi'                => 'Asia/Shanghai',
-    'Irkutsk, Ulaan Bataar'                                    => 'Asia/Irkutsk',
-    'Kuala Lumpur, Singapore'                                  => 'Asia/Singapore',
-    'Perth, Western Australia'                                 => 'Australia/Perth',
-    'Taipei'                                                   => 'Asia/Taipei',
-    'Osaka, Sapporo, Tokyo'                                    => 'Asia/Tokyo',
-    'Seoul, Korea Standard time'                               => 'Asia/Seoul',
-    'Yakutsk'                                                  => 'Asia/Yakutsk',
-    'Adelaide, Central Australia'                              => 'Australia/Adelaide',
-    'Darwin'                                                   => 'Australia/Darwin',
-    'Brisbane, East Australia'                                 => 'Australia/Brisbane',
-    'Canberra, Melbourne, Sydney, Hobart (year 2000 only)'     => 'Australia/Sydney',
-    'Guam, Port Moresby'                                       => 'Pacific/Guam',
-    'Hobart, Tasmania'                                         => 'Australia/Hobart',
-    'Vladivostok'                                              => 'Asia/Vladivostok',
-    'Magadan, Solomon Is., New Caledonia'                      => 'Asia/Magadan',
-    'Auckland, Wellington'                                     => 'Pacific/Auckland',
-    'Fiji Islands, Kamchatka, Marshall Is.'                    => 'Pacific/Fiji',
-    'Nuku\'alofa, Tonga'                                       => 'Pacific/Tongatapu',
-    'Azores'                                                   => 'Atlantic/Azores',
-    'Cape Verde Is.'                                           => 'Atlantic/Cape_Verde',
-    'Mid-Atlantic'                                             => 'America/Noronha',
-    'Brasilia'                                                 => 'America/Sao_Paulo', // Best guess
-    'Buenos Aires'                                             => 'America/Argentina/Buenos_Aires',
-    'Greenland'                                                => 'America/Godthab',
-    'Newfoundland'                                             => 'America/St_Johns',
-    'Atlantic Time (Canada)'                                   => 'America/Halifax',
-    'Caracas, La Paz'                                          => 'America/Caracas',
-    'Santiago'                                                 => 'America/Santiago',
-    'Bogota, Lima, Quito'                                      => 'America/Bogota',
-    'Eastern Time (US & Canada)'                               => 'America/New_York',
-    'Indiana (East)'                                           => 'America/Indiana/Indianapolis',
-    'Central America'                                          => 'America/Guatemala',
-    'Central Time (US & Canada)'                               => 'America/Chicago',
-    'Mexico City, Tegucigalpa'                                 => 'America/Mexico_City',
-    'Saskatchewan'                                             => 'America/Edmonton',
-    'Arizona'                                                  => 'America/Phoenix',
-    'Mountain Time (US & Canada)'                              => 'America/Denver', // Best guess
-    'Pacific Time (US & Canada)'                               => 'America/Los_Angeles', // Best guess
-    'Pacific Time (US & Canada); Tijuana'                      => 'America/Los_Angeles', // Best guess
-    'Alaska'                                                   => 'America/Anchorage',
-    'Hawaii'                                                   => 'Pacific/Honolulu',
-    'Midway Island, Samoa'                                     => 'Pacific/Midway',
-    'Eniwetok, Kwajalein, Dateline Time'                       => 'Pacific/Kwajalein',
+    'Kathmandu, Nepal' => 'Asia/Kathmandu',
+    'Almaty, Novosibirsk, North Central Asia' => 'Asia/Almaty',
+    'Astana, Dhaka' => 'Asia/Dhaka',
+    'Sri Jayawardenepura, Sri Lanka' => 'Asia/Colombo',
+    'Rangoon' => 'Asia/Rangoon',
+    'Bangkok, Hanoi, Jakarta' => 'Asia/Bangkok',
+    'Krasnoyarsk' => 'Asia/Krasnoyarsk',
+    'Beijing, Chongqing, Hong Kong SAR, Urumqi' => 'Asia/Shanghai',
+    'Irkutsk, Ulaan Bataar' => 'Asia/Irkutsk',
+    'Kuala Lumpur, Singapore' => 'Asia/Singapore',
+    'Perth, Western Australia' => 'Australia/Perth',
+    'Taipei' => 'Asia/Taipei',
+    'Osaka, Sapporo, Tokyo' => 'Asia/Tokyo',
+    'Seoul, Korea Standard time' => 'Asia/Seoul',
+    'Yakutsk' => 'Asia/Yakutsk',
+    'Adelaide, Central Australia' => 'Australia/Adelaide',
+    'Darwin' => 'Australia/Darwin',
+    'Brisbane, East Australia' => 'Australia/Brisbane',
+    'Canberra, Melbourne, Sydney, Hobart (year 2000 only)' => 'Australia/Sydney',
+    'Guam, Port Moresby' => 'Pacific/Guam',
+    'Hobart, Tasmania' => 'Australia/Hobart',
+    'Vladivostok' => 'Asia/Vladivostok',
+    'Magadan, Solomon Is., New Caledonia' => 'Asia/Magadan',
+    'Auckland, Wellington' => 'Pacific/Auckland',
+    'Fiji Islands, Kamchatka, Marshall Is.' => 'Pacific/Fiji',
+    'Nuku\'alofa, Tonga' => 'Pacific/Tongatapu',
+    'Azores' => 'Atlantic/Azores',
+    'Cape Verde Is.' => 'Atlantic/Cape_Verde',
+    'Mid-Atlantic' => 'America/Noronha',
+    'Brasilia' => 'America/Sao_Paulo', // Best guess
+    'Buenos Aires' => 'America/Argentina/Buenos_Aires',
+    'Greenland' => 'America/Godthab',
+    'Newfoundland' => 'America/St_Johns',
+    'Atlantic Time (Canada)' => 'America/Halifax',
+    'Caracas, La Paz' => 'America/Caracas',
+    'Santiago' => 'America/Santiago',
+    'Bogota, Lima, Quito' => 'America/Bogota',
+    'Eastern Time (US & Canada)' => 'America/New_York',
+    'Indiana (East)' => 'America/Indiana/Indianapolis',
+    'Central America' => 'America/Guatemala',
+    'Central Time (US & Canada)' => 'America/Chicago',
+    'Mexico City, Tegucigalpa' => 'America/Mexico_City',
+    'Saskatchewan' => 'America/Edmonton',
+    'Arizona' => 'America/Phoenix',
+    'Mountain Time (US & Canada)' => 'America/Denver', // Best guess
+    'Pacific Time (US & Canada)' => 'America/Los_Angeles', // Best guess
+    'Pacific Time (US & Canada); Tijuana' => 'America/Los_Angeles', // Best guess
+    'Alaska' => 'America/Anchorage',
+    'Hawaii' => 'Pacific/Honolulu',
+    'Midway Island, Samoa' => 'Pacific/Midway',
+    'Eniwetok, Kwajalein, Dateline Time' => 'Pacific/Kwajalein',
 ];
diff --git a/vendor/sabre/vobject/lib/timezonedata/lotuszones.php b/vendor/sabre/vobject/lib/timezonedata/lotuszones.php
index 79d555a92..4b50808f9 100644
--- a/vendor/sabre/vobject/lib/timezonedata/lotuszones.php
+++ b/vendor/sabre/vobject/lib/timezonedata/lotuszones.php
@@ -8,94 +8,94 @@
  * @license http://sabre.io/license/ Modified BSD License
  */
 return [
-    'Dateline'               => 'Etc/GMT-12',
-    'Samoa'                  => 'Pacific/Apia',
-    'Hawaiian'               => 'Pacific/Honolulu',
-    'Alaskan'                => 'America/Anchorage',
-    'Pacific'                => 'America/Los_Angeles',
-    'Pacific Standard Time'  => 'America/Los_Angeles',
+    'Dateline' => 'Etc/GMT-12',
+    'Samoa' => 'Pacific/Apia',
+    'Hawaiian' => 'Pacific/Honolulu',
+    'Alaskan' => 'America/Anchorage',
+    'Pacific' => 'America/Los_Angeles',
+    'Pacific Standard Time' => 'America/Los_Angeles',
     'Mexico Standard Time 2' => 'America/Chihuahua',
-    'Mountain'               => 'America/Denver',
+    'Mountain' => 'America/Denver',
     // 'Mountain Standard Time' => 'America/Chihuahua', // conflict with windows timezones.
-    'US Mountain'     => 'America/Phoenix',
-    'Canada Central'  => 'America/Edmonton',
+    'US Mountain' => 'America/Phoenix',
+    'Canada Central' => 'America/Edmonton',
     'Central America' => 'America/Guatemala',
-    'Central'         => 'America/Chicago',
+    'Central' => 'America/Chicago',
     // 'Central Standard Time'  => 'America/Mexico_City', // conflict with windows timezones.
-    'Mexico'            => 'America/Mexico_City',
-    'Eastern'           => 'America/New_York',
-    'SA Pacific'        => 'America/Bogota',
-    'US Eastern'        => 'America/Indiana/Indianapolis',
-    'Venezuela'         => 'America/Caracas',
-    'Atlantic'          => 'America/Halifax',
+    'Mexico' => 'America/Mexico_City',
+    'Eastern' => 'America/New_York',
+    'SA Pacific' => 'America/Bogota',
+    'US Eastern' => 'America/Indiana/Indianapolis',
+    'Venezuela' => 'America/Caracas',
+    'Atlantic' => 'America/Halifax',
     'Central Brazilian' => 'America/Manaus',
-    'Pacific SA'        => 'America/Santiago',
-    'SA Western'        => 'America/La_Paz',
-    'Newfoundland'      => 'America/St_Johns',
-    'Argentina'         => 'America/Argentina/Buenos_Aires',
-    'E. South America'  => 'America/Belem',
-    'Greenland'         => 'America/Godthab',
-    'Montevideo'        => 'America/Montevideo',
-    'SA Eastern'        => 'America/Belem',
+    'Pacific SA' => 'America/Santiago',
+    'SA Western' => 'America/La_Paz',
+    'Newfoundland' => 'America/St_Johns',
+    'Argentina' => 'America/Argentina/Buenos_Aires',
+    'E. South America' => 'America/Belem',
+    'Greenland' => 'America/Godthab',
+    'Montevideo' => 'America/Montevideo',
+    'SA Eastern' => 'America/Belem',
     // 'Mid-Atlantic'           => 'Etc/GMT-2', // conflict with windows timezones.
-    'Azores'            => 'Atlantic/Azores',
-    'Cape Verde'        => 'Atlantic/Cape_Verde',
-    'Greenwich'         => 'Atlantic/Reykjavik', // No I'm serious.. Greenwich is not GMT.
-    'Morocco'           => 'Africa/Casablanca',
-    'Central Europe'    => 'Europe/Prague',
-    'Central European'  => 'Europe/Sarajevo',
-    'Romance'           => 'Europe/Paris',
+    'Azores' => 'Atlantic/Azores',
+    'Cape Verde' => 'Atlantic/Cape_Verde',
+    'Greenwich' => 'Atlantic/Reykjavik', // No I'm serious.. Greenwich is not GMT.
+    'Morocco' => 'Africa/Casablanca',
+    'Central Europe' => 'Europe/Prague',
+    'Central European' => 'Europe/Sarajevo',
+    'Romance' => 'Europe/Paris',
     'W. Central Africa' => 'Africa/Lagos', // Best guess
-    'W. Europe'         => 'Europe/Amsterdam',
-    'E. Europe'         => 'Europe/Minsk',
-    'Egypt'             => 'Africa/Cairo',
-    'FLE'               => 'Europe/Helsinki',
-    'GTB'               => 'Europe/Athens',
-    'Israel'            => 'Asia/Jerusalem',
-    'Jordan'            => 'Asia/Amman',
-    'Middle East'       => 'Asia/Beirut',
-    'Namibia'           => 'Africa/Windhoek',
-    'South Africa'      => 'Africa/Harare',
-    'Arab'              => 'Asia/Kuwait',
-    'Arabic'            => 'Asia/Baghdad',
-    'E. Africa'         => 'Africa/Nairobi',
-    'Georgian'          => 'Asia/Tbilisi',
-    'Russian'           => 'Europe/Moscow',
-    'Iran'              => 'Asia/Tehran',
-    'Arabian'           => 'Asia/Muscat',
-    'Armenian'          => 'Asia/Yerevan',
-    'Azerbijan'         => 'Asia/Baku',
-    'Caucasus'          => 'Asia/Yerevan',
-    'Mauritius'         => 'Indian/Mauritius',
-    'Afghanistan'       => 'Asia/Kabul',
-    'Ekaterinburg'      => 'Asia/Yekaterinburg',
-    'Pakistan'          => 'Asia/Karachi',
-    'West Asia'         => 'Asia/Tashkent',
-    'India'             => 'Asia/Calcutta',
-    'Sri Lanka'         => 'Asia/Colombo',
-    'Nepal'             => 'Asia/Kathmandu',
-    'Central Asia'      => 'Asia/Dhaka',
-    'N. Central Asia'   => 'Asia/Almaty',
-    'Myanmar'           => 'Asia/Rangoon',
-    'North Asia'        => 'Asia/Krasnoyarsk',
-    'SE Asia'           => 'Asia/Bangkok',
-    'China'             => 'Asia/Shanghai',
-    'North Asia East'   => 'Asia/Irkutsk',
-    'Singapore'         => 'Asia/Singapore',
-    'Taipei'            => 'Asia/Taipei',
-    'W. Australia'      => 'Australia/Perth',
-    'Korea'             => 'Asia/Seoul',
-    'Tokyo'             => 'Asia/Tokyo',
-    'Yakutsk'           => 'Asia/Yakutsk',
-    'AUS Central'       => 'Australia/Darwin',
-    'Cen. Australia'    => 'Australia/Adelaide',
-    'AUS Eastern'       => 'Australia/Sydney',
-    'E. Australia'      => 'Australia/Brisbane',
-    'Tasmania'          => 'Australia/Hobart',
-    'Vladivostok'       => 'Asia/Vladivostok',
-    'West Pacific'      => 'Pacific/Guam',
-    'Central Pacific'   => 'Asia/Magadan',
-    'Fiji'              => 'Pacific/Fiji',
-    'New Zealand'       => 'Pacific/Auckland',
-    'Tonga'             => 'Pacific/Tongatapu',
+    'W. Europe' => 'Europe/Amsterdam',
+    'E. Europe' => 'Europe/Minsk',
+    'Egypt' => 'Africa/Cairo',
+    'FLE' => 'Europe/Helsinki',
+    'GTB' => 'Europe/Athens',
+    'Israel' => 'Asia/Jerusalem',
+    'Jordan' => 'Asia/Amman',
+    'Middle East' => 'Asia/Beirut',
+    'Namibia' => 'Africa/Windhoek',
+    'South Africa' => 'Africa/Harare',
+    'Arab' => 'Asia/Kuwait',
+    'Arabic' => 'Asia/Baghdad',
+    'E. Africa' => 'Africa/Nairobi',
+    'Georgian' => 'Asia/Tbilisi',
+    'Russian' => 'Europe/Moscow',
+    'Iran' => 'Asia/Tehran',
+    'Arabian' => 'Asia/Muscat',
+    'Armenian' => 'Asia/Yerevan',
+    'Azerbijan' => 'Asia/Baku',
+    'Caucasus' => 'Asia/Yerevan',
+    'Mauritius' => 'Indian/Mauritius',
+    'Afghanistan' => 'Asia/Kabul',
+    'Ekaterinburg' => 'Asia/Yekaterinburg',
+    'Pakistan' => 'Asia/Karachi',
+    'West Asia' => 'Asia/Tashkent',
+    'India' => 'Asia/Calcutta',
+    'Sri Lanka' => 'Asia/Colombo',
+    'Nepal' => 'Asia/Kathmandu',
+    'Central Asia' => 'Asia/Dhaka',
+    'N. Central Asia' => 'Asia/Almaty',
+    'Myanmar' => 'Asia/Rangoon',
+    'North Asia' => 'Asia/Krasnoyarsk',
+    'SE Asia' => 'Asia/Bangkok',
+    'China' => 'Asia/Shanghai',
+    'North Asia East' => 'Asia/Irkutsk',
+    'Singapore' => 'Asia/Singapore',
+    'Taipei' => 'Asia/Taipei',
+    'W. Australia' => 'Australia/Perth',
+    'Korea' => 'Asia/Seoul',
+    'Tokyo' => 'Asia/Tokyo',
+    'Yakutsk' => 'Asia/Yakutsk',
+    'AUS Central' => 'Australia/Darwin',
+    'Cen. Australia' => 'Australia/Adelaide',
+    'AUS Eastern' => 'Australia/Sydney',
+    'E. Australia' => 'Australia/Brisbane',
+    'Tasmania' => 'Australia/Hobart',
+    'Vladivostok' => 'Asia/Vladivostok',
+    'West Pacific' => 'Pacific/Guam',
+    'Central Pacific' => 'Asia/Magadan',
+    'Fiji' => 'Pacific/Fiji',
+    'New Zealand' => 'Pacific/Auckland',
+    'Tonga' => 'Pacific/Tongatapu',
 ];
diff --git a/vendor/sabre/vobject/lib/timezonedata/php-workaround.php b/vendor/sabre/vobject/lib/timezonedata/php-workaround.php
index 6b9cb6ef7..13ff4b302 100644
--- a/vendor/sabre/vobject/lib/timezonedata/php-workaround.php
+++ b/vendor/sabre/vobject/lib/timezonedata/php-workaround.php
@@ -15,32 +15,32 @@
  * @license http://sabre.io/license/ Modified BSD License
  */
 return [
-    'CST6CDT'   => 'America/Chicago',
-    'Cuba'      => 'America/Havana',
-    'Egypt'     => 'Africa/Cairo',
-    'Eire'      => 'Europe/Dublin',
-    'EST5EDT'   => 'America/New_York',
-    'Factory'   => 'UTC',
-    'GB-Eire'   => 'Europe/London',
-    'GMT0'      => 'UTC',
+    'CST6CDT' => 'America/Chicago',
+    'Cuba' => 'America/Havana',
+    'Egypt' => 'Africa/Cairo',
+    'Eire' => 'Europe/Dublin',
+    'EST5EDT' => 'America/New_York',
+    'Factory' => 'UTC',
+    'GB-Eire' => 'Europe/London',
+    'GMT0' => 'UTC',
     'Greenwich' => 'UTC',
-    'Hongkong'  => 'Asia/Hong_Kong',
-    'Iceland'   => 'Atlantic/Reykjavik',
-    'Iran'      => 'Asia/Tehran',
-    'Israel'    => 'Asia/Jerusalem',
-    'Jamaica'   => 'America/Jamaica',
-    'Japan'     => 'Asia/Tokyo',
+    'Hongkong' => 'Asia/Hong_Kong',
+    'Iceland' => 'Atlantic/Reykjavik',
+    'Iran' => 'Asia/Tehran',
+    'Israel' => 'Asia/Jerusalem',
+    'Jamaica' => 'America/Jamaica',
+    'Japan' => 'Asia/Tokyo',
     'Kwajalein' => 'Pacific/Kwajalein',
-    'Libya'     => 'Africa/Tripoli',
-    'MST7MDT'   => 'America/Denver',
-    'Navajo'    => 'America/Denver',
-    'NZ-CHAT'   => 'Pacific/Chatham',
-    'Poland'    => 'Europe/Warsaw',
-    'Portugal'  => 'Europe/Lisbon',
-    'PST8PDT'   => 'America/Los_Angeles',
+    'Libya' => 'Africa/Tripoli',
+    'MST7MDT' => 'America/Denver',
+    'Navajo' => 'America/Denver',
+    'NZ-CHAT' => 'Pacific/Chatham',
+    'Poland' => 'Europe/Warsaw',
+    'Portugal' => 'Europe/Lisbon',
+    'PST8PDT' => 'America/Los_Angeles',
     'Singapore' => 'Asia/Singapore',
-    'Turkey'    => 'Europe/Istanbul',
+    'Turkey' => 'Europe/Istanbul',
     'Universal' => 'UTC',
-    'W-SU'      => 'Europe/Moscow',
-    'Zulu'      => 'UTC',
+    'W-SU' => 'Europe/Moscow',
+    'Zulu' => 'UTC',
 ];
diff --git a/vendor/sabre/vobject/lib/timezonedata/windowszones.php b/vendor/sabre/vobject/lib/timezonedata/windowszones.php
index 29f3a6cb8..af3904b12 100644
--- a/vendor/sabre/vobject/lib/timezonedata/windowszones.php
+++ b/vendor/sabre/vobject/lib/timezonedata/windowszones.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Automatically generated timezone file
+ * Automatically generated timezone file.
  *
  * Last update: 2016-08-24T17:35:38-04:00
  * Source: http://unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml
@@ -11,133 +11,133 @@
  */
 
 return  [
-  'AUS Central Standard Time'       => 'Australia/Darwin',
-  'AUS Eastern Standard Time'       => 'Australia/Sydney',
-  'Afghanistan Standard Time'       => 'Asia/Kabul',
-  'Alaskan Standard Time'           => 'America/Anchorage',
-  'Aleutian Standard Time'          => 'America/Adak',
-  'Altai Standard Time'             => 'Asia/Barnaul',
-  'Arab Standard Time'              => 'Asia/Riyadh',
-  'Arabian Standard Time'           => 'Asia/Dubai',
-  'Arabic Standard Time'            => 'Asia/Baghdad',
-  'Argentina Standard Time'         => 'America/Buenos_Aires',
-  'Astrakhan Standard Time'         => 'Europe/Astrakhan',
-  'Atlantic Standard Time'          => 'America/Halifax',
-  'Aus Central W. Standard Time'    => 'Australia/Eucla',
-  'Azerbaijan Standard Time'        => 'Asia/Baku',
-  'Azores Standard Time'            => 'Atlantic/Azores',
-  'Bahia Standard Time'             => 'America/Bahia',
-  'Bangladesh Standard Time'        => 'Asia/Dhaka',
-  'Belarus Standard Time'           => 'Europe/Minsk',
-  'Bougainville Standard Time'      => 'Pacific/Bougainville',
-  'Canada Central Standard Time'    => 'America/Regina',
-  'Cape Verde Standard Time'        => 'Atlantic/Cape_Verde',
-  'Caucasus Standard Time'          => 'Asia/Yerevan',
-  'Cen. Australia Standard Time'    => 'Australia/Adelaide',
-  'Central America Standard Time'   => 'America/Guatemala',
-  'Central Asia Standard Time'      => 'Asia/Almaty',
+  'AUS Central Standard Time' => 'Australia/Darwin',
+  'AUS Eastern Standard Time' => 'Australia/Sydney',
+  'Afghanistan Standard Time' => 'Asia/Kabul',
+  'Alaskan Standard Time' => 'America/Anchorage',
+  'Aleutian Standard Time' => 'America/Adak',
+  'Altai Standard Time' => 'Asia/Barnaul',
+  'Arab Standard Time' => 'Asia/Riyadh',
+  'Arabian Standard Time' => 'Asia/Dubai',
+  'Arabic Standard Time' => 'Asia/Baghdad',
+  'Argentina Standard Time' => 'America/Buenos_Aires',
+  'Astrakhan Standard Time' => 'Europe/Astrakhan',
+  'Atlantic Standard Time' => 'America/Halifax',
+  'Aus Central W. Standard Time' => 'Australia/Eucla',
+  'Azerbaijan Standard Time' => 'Asia/Baku',
+  'Azores Standard Time' => 'Atlantic/Azores',
+  'Bahia Standard Time' => 'America/Bahia',
+  'Bangladesh Standard Time' => 'Asia/Dhaka',
+  'Belarus Standard Time' => 'Europe/Minsk',
+  'Bougainville Standard Time' => 'Pacific/Bougainville',
+  'Canada Central Standard Time' => 'America/Regina',
+  'Cape Verde Standard Time' => 'Atlantic/Cape_Verde',
+  'Caucasus Standard Time' => 'Asia/Yerevan',
+  'Cen. Australia Standard Time' => 'Australia/Adelaide',
+  'Central America Standard Time' => 'America/Guatemala',
+  'Central Asia Standard Time' => 'Asia/Almaty',
   'Central Brazilian Standard Time' => 'America/Cuiaba',
-  'Central Europe Standard Time'    => 'Europe/Budapest',
-  'Central European Standard Time'  => 'Europe/Warsaw',
-  'Central Pacific Standard Time'   => 'Pacific/Guadalcanal',
-  'Central Standard Time'           => 'America/Chicago',
-  'Central Standard Time (Mexico)'  => 'America/Mexico_City',
-  'Chatham Islands Standard Time'   => 'Pacific/Chatham',
-  'China Standard Time'             => 'Asia/Shanghai',
-  'Cuba Standard Time'              => 'America/Havana',
-  'Dateline Standard Time'          => 'Etc/GMT+12',
-  'E. Africa Standard Time'         => 'Africa/Nairobi',
-  'E. Australia Standard Time'      => 'Australia/Brisbane',
-  'E. Europe Standard Time'         => 'Europe/Chisinau',
-  'E. South America Standard Time'  => 'America/Sao_Paulo',
-  'Easter Island Standard Time'     => 'Pacific/Easter',
-  'Eastern Standard Time'           => 'America/New_York',
-  'Eastern Standard Time (Mexico)'  => 'America/Cancun',
-  'Egypt Standard Time'             => 'Africa/Cairo',
-  'Ekaterinburg Standard Time'      => 'Asia/Yekaterinburg',
-  'FLE Standard Time'               => 'Europe/Kiev',
-  'Fiji Standard Time'              => 'Pacific/Fiji',
-  'GMT Standard Time'               => 'Europe/London',
-  'GTB Standard Time'               => 'Europe/Bucharest',
-  'Georgian Standard Time'          => 'Asia/Tbilisi',
-  'Greenland Standard Time'         => 'America/Godthab',
-  'Greenwich Standard Time'         => 'Atlantic/Reykjavik',
-  'Haiti Standard Time'             => 'America/Port-au-Prince',
-  'Hawaiian Standard Time'          => 'Pacific/Honolulu',
-  'India Standard Time'             => 'Asia/Calcutta',
-  'Iran Standard Time'              => 'Asia/Tehran',
-  'Israel Standard Time'            => 'Asia/Jerusalem',
-  'Jordan Standard Time'            => 'Asia/Amman',
-  'Kaliningrad Standard Time'       => 'Europe/Kaliningrad',
-  'Korea Standard Time'             => 'Asia/Seoul',
-  'Libya Standard Time'             => 'Africa/Tripoli',
-  'Line Islands Standard Time'      => 'Pacific/Kiritimati',
-  'Lord Howe Standard Time'         => 'Australia/Lord_Howe',
-  'Magadan Standard Time'           => 'Asia/Magadan',
-  'Marquesas Standard Time'         => 'Pacific/Marquesas',
-  'Mauritius Standard Time'         => 'Indian/Mauritius',
-  'Middle East Standard Time'       => 'Asia/Beirut',
-  'Montevideo Standard Time'        => 'America/Montevideo',
-  'Morocco Standard Time'           => 'Africa/Casablanca',
-  'Mountain Standard Time'          => 'America/Denver',
+  'Central Europe Standard Time' => 'Europe/Budapest',
+  'Central European Standard Time' => 'Europe/Warsaw',
+  'Central Pacific Standard Time' => 'Pacific/Guadalcanal',
+  'Central Standard Time' => 'America/Chicago',
+  'Central Standard Time (Mexico)' => 'America/Mexico_City',
+  'Chatham Islands Standard Time' => 'Pacific/Chatham',
+  'China Standard Time' => 'Asia/Shanghai',
+  'Cuba Standard Time' => 'America/Havana',
+  'Dateline Standard Time' => 'Etc/GMT+12',
+  'E. Africa Standard Time' => 'Africa/Nairobi',
+  'E. Australia Standard Time' => 'Australia/Brisbane',
+  'E. Europe Standard Time' => 'Europe/Chisinau',
+  'E. South America Standard Time' => 'America/Sao_Paulo',
+  'Easter Island Standard Time' => 'Pacific/Easter',
+  'Eastern Standard Time' => 'America/New_York',
+  'Eastern Standard Time (Mexico)' => 'America/Cancun',
+  'Egypt Standard Time' => 'Africa/Cairo',
+  'Ekaterinburg Standard Time' => 'Asia/Yekaterinburg',
+  'FLE Standard Time' => 'Europe/Kiev',
+  'Fiji Standard Time' => 'Pacific/Fiji',
+  'GMT Standard Time' => 'Europe/London',
+  'GTB Standard Time' => 'Europe/Bucharest',
+  'Georgian Standard Time' => 'Asia/Tbilisi',
+  'Greenland Standard Time' => 'America/Godthab',
+  'Greenwich Standard Time' => 'Atlantic/Reykjavik',
+  'Haiti Standard Time' => 'America/Port-au-Prince',
+  'Hawaiian Standard Time' => 'Pacific/Honolulu',
+  'India Standard Time' => 'Asia/Calcutta',
+  'Iran Standard Time' => 'Asia/Tehran',
+  'Israel Standard Time' => 'Asia/Jerusalem',
+  'Jordan Standard Time' => 'Asia/Amman',
+  'Kaliningrad Standard Time' => 'Europe/Kaliningrad',
+  'Korea Standard Time' => 'Asia/Seoul',
+  'Libya Standard Time' => 'Africa/Tripoli',
+  'Line Islands Standard Time' => 'Pacific/Kiritimati',
+  'Lord Howe Standard Time' => 'Australia/Lord_Howe',
+  'Magadan Standard Time' => 'Asia/Magadan',
+  'Marquesas Standard Time' => 'Pacific/Marquesas',
+  'Mauritius Standard Time' => 'Indian/Mauritius',
+  'Middle East Standard Time' => 'Asia/Beirut',
+  'Montevideo Standard Time' => 'America/Montevideo',
+  'Morocco Standard Time' => 'Africa/Casablanca',
+  'Mountain Standard Time' => 'America/Denver',
   'Mountain Standard Time (Mexico)' => 'America/Chihuahua',
-  'Myanmar Standard Time'           => 'Asia/Rangoon',
-  'N. Central Asia Standard Time'   => 'Asia/Novosibirsk',
-  'Namibia Standard Time'           => 'Africa/Windhoek',
-  'Nepal Standard Time'             => 'Asia/Katmandu',
-  'New Zealand Standard Time'       => 'Pacific/Auckland',
-  'Newfoundland Standard Time'      => 'America/St_Johns',
-  'Norfolk Standard Time'           => 'Pacific/Norfolk',
-  'North Asia East Standard Time'   => 'Asia/Irkutsk',
-  'North Asia Standard Time'        => 'Asia/Krasnoyarsk',
-  'North Korea Standard Time'       => 'Asia/Pyongyang',
-  'Pacific SA Standard Time'        => 'America/Santiago',
-  'Pacific Standard Time'           => 'America/Los_Angeles',
-  'Pacific Standard Time (Mexico)'  => 'America/Tijuana',
-  'Pakistan Standard Time'          => 'Asia/Karachi',
-  'Paraguay Standard Time'          => 'America/Asuncion',
-  'Romance Standard Time'           => 'Europe/Paris',
-  'Russia Time Zone 10'             => 'Asia/Srednekolymsk',
-  'Russia Time Zone 11'             => 'Asia/Kamchatka',
-  'Russia Time Zone 3'              => 'Europe/Samara',
-  'Russian Standard Time'           => 'Europe/Moscow',
-  'SA Eastern Standard Time'        => 'America/Cayenne',
-  'SA Pacific Standard Time'        => 'America/Bogota',
-  'SA Western Standard Time'        => 'America/La_Paz',
-  'SE Asia Standard Time'           => 'Asia/Bangkok',
-  'Saint Pierre Standard Time'      => 'America/Miquelon',
-  'Sakhalin Standard Time'          => 'Asia/Sakhalin',
-  'Samoa Standard Time'             => 'Pacific/Apia',
-  'Singapore Standard Time'         => 'Asia/Singapore',
-  'South Africa Standard Time'      => 'Africa/Johannesburg',
-  'Sri Lanka Standard Time'         => 'Asia/Colombo',
-  'Syria Standard Time'             => 'Asia/Damascus',
-  'Taipei Standard Time'            => 'Asia/Taipei',
-  'Tasmania Standard Time'          => 'Australia/Hobart',
-  'Tocantins Standard Time'         => 'America/Araguaina',
-  'Tokyo Standard Time'             => 'Asia/Tokyo',
-  'Tomsk Standard Time'             => 'Asia/Tomsk',
-  'Tonga Standard Time'             => 'Pacific/Tongatapu',
-  'Transbaikal Standard Time'       => 'Asia/Chita',
-  'Turkey Standard Time'            => 'Europe/Istanbul',
-  'Turks And Caicos Standard Time'  => 'America/Grand_Turk',
-  'US Eastern Standard Time'        => 'America/Indianapolis',
-  'US Mountain Standard Time'       => 'America/Phoenix',
-  'UTC'                             => 'Etc/GMT',
-  'UTC+12'                          => 'Etc/GMT-12',
-  'UTC-02'                          => 'Etc/GMT+2',
-  'UTC-08'                          => 'Etc/GMT+8',
-  'UTC-09'                          => 'Etc/GMT+9',
-  'UTC-11'                          => 'Etc/GMT+11',
-  'Ulaanbaatar Standard Time'       => 'Asia/Ulaanbaatar',
-  'Venezuela Standard Time'         => 'America/Caracas',
-  'Vladivostok Standard Time'       => 'Asia/Vladivostok',
-  'W. Australia Standard Time'      => 'Australia/Perth',
+  'Myanmar Standard Time' => 'Asia/Rangoon',
+  'N. Central Asia Standard Time' => 'Asia/Novosibirsk',
+  'Namibia Standard Time' => 'Africa/Windhoek',
+  'Nepal Standard Time' => 'Asia/Katmandu',
+  'New Zealand Standard Time' => 'Pacific/Auckland',
+  'Newfoundland Standard Time' => 'America/St_Johns',
+  'Norfolk Standard Time' => 'Pacific/Norfolk',
+  'North Asia East Standard Time' => 'Asia/Irkutsk',
+  'North Asia Standard Time' => 'Asia/Krasnoyarsk',
+  'North Korea Standard Time' => 'Asia/Pyongyang',
+  'Pacific SA Standard Time' => 'America/Santiago',
+  'Pacific Standard Time' => 'America/Los_Angeles',
+  'Pacific Standard Time (Mexico)' => 'America/Tijuana',
+  'Pakistan Standard Time' => 'Asia/Karachi',
+  'Paraguay Standard Time' => 'America/Asuncion',
+  'Romance Standard Time' => 'Europe/Paris',
+  'Russia Time Zone 10' => 'Asia/Srednekolymsk',
+  'Russia Time Zone 11' => 'Asia/Kamchatka',
+  'Russia Time Zone 3' => 'Europe/Samara',
+  'Russian Standard Time' => 'Europe/Moscow',
+  'SA Eastern Standard Time' => 'America/Cayenne',
+  'SA Pacific Standard Time' => 'America/Bogota',
+  'SA Western Standard Time' => 'America/La_Paz',
+  'SE Asia Standard Time' => 'Asia/Bangkok',
+  'Saint Pierre Standard Time' => 'America/Miquelon',
+  'Sakhalin Standard Time' => 'Asia/Sakhalin',
+  'Samoa Standard Time' => 'Pacific/Apia',
+  'Singapore Standard Time' => 'Asia/Singapore',
+  'South Africa Standard Time' => 'Africa/Johannesburg',
+  'Sri Lanka Standard Time' => 'Asia/Colombo',
+  'Syria Standard Time' => 'Asia/Damascus',
+  'Taipei Standard Time' => 'Asia/Taipei',
+  'Tasmania Standard Time' => 'Australia/Hobart',
+  'Tocantins Standard Time' => 'America/Araguaina',
+  'Tokyo Standard Time' => 'Asia/Tokyo',
+  'Tomsk Standard Time' => 'Asia/Tomsk',
+  'Tonga Standard Time' => 'Pacific/Tongatapu',
+  'Transbaikal Standard Time' => 'Asia/Chita',
+  'Turkey Standard Time' => 'Europe/Istanbul',
+  'Turks And Caicos Standard Time' => 'America/Grand_Turk',
+  'US Eastern Standard Time' => 'America/Indianapolis',
+  'US Mountain Standard Time' => 'America/Phoenix',
+  'UTC' => 'Etc/GMT',
+  'UTC+12' => 'Etc/GMT-12',
+  'UTC-02' => 'Etc/GMT+2',
+  'UTC-08' => 'Etc/GMT+8',
+  'UTC-09' => 'Etc/GMT+9',
+  'UTC-11' => 'Etc/GMT+11',
+  'Ulaanbaatar Standard Time' => 'Asia/Ulaanbaatar',
+  'Venezuela Standard Time' => 'America/Caracas',
+  'Vladivostok Standard Time' => 'Asia/Vladivostok',
+  'W. Australia Standard Time' => 'Australia/Perth',
   'W. Central Africa Standard Time' => 'Africa/Lagos',
-  'W. Europe Standard Time'         => 'Europe/Berlin',
-  'W. Mongolia Standard Time'       => 'Asia/Hovd',
-  'West Asia Standard Time'         => 'Asia/Tashkent',
-  'West Bank Standard Time'         => 'Asia/Hebron',
-  'West Pacific Standard Time'      => 'Pacific/Port_Moresby',
-  'Yakutsk Standard Time'           => 'Asia/Yakutsk',
+  'W. Europe Standard Time' => 'Europe/Berlin',
+  'W. Mongolia Standard Time' => 'Asia/Hovd',
+  'West Asia Standard Time' => 'Asia/Tashkent',
+  'West Bank Standard Time' => 'Asia/Hebron',
+  'West Pacific Standard Time' => 'Pacific/Port_Moresby',
+  'Yakutsk Standard Time' => 'Asia/Yakutsk',
 ];
diff --git a/vendor/sabre/vobject/tests/bootstrap.php b/vendor/sabre/vobject/tests/bootstrap.php
index 14281e218..46e9014cb 100644
--- a/vendor/sabre/vobject/tests/bootstrap.php
+++ b/vendor/sabre/vobject/tests/bootstrap.php
@@ -3,8 +3,8 @@
 date_default_timezone_set('UTC');
 
 $try = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
 ];
 
 foreach ($try as $path) {
@@ -14,12 +14,12 @@ foreach ($try as $path) {
     }
 }
 
-$autoLoader->addPsr4('Sabre\\VObject\\', __DIR__ . '/VObject');
+$autoLoader->addPsr4('Sabre\\VObject\\', __DIR__.'/VObject');
 
 if (!defined('SABRE_TEMPDIR')) {
-  define('SABRE_TEMPDIR', __DIR__ . '/temp/');
+    define('SABRE_TEMPDIR', __DIR__.'/temp/');
 }
 
 if (!file_exists(SABRE_TEMPDIR)) {
-  mkdir(SABRE_TEMPDIR);
+    mkdir(SABRE_TEMPDIR);
 }
diff --git a/vendor/sabre/xml/CHANGELOG.md b/vendor/sabre/xml/CHANGELOG.md
index 39a39bffe..faeba20e5 100644
--- a/vendor/sabre/xml/CHANGELOG.md
+++ b/vendor/sabre/xml/CHANGELOG.md
@@ -1,6 +1,12 @@
 ChangeLog
 =========
 
+1.5.1 (2019-01-09)
+------------------
+
+* #161: Prevent infinite loop on empty xml elements
+
+
 1.5.0 (2016-10-09)
 ------------------
 
diff --git a/vendor/sabre/xml/composer.json b/vendor/sabre/xml/composer.json
index 386f8213f..1b5760393 100644
--- a/vendor/sabre/xml/composer.json
+++ b/vendor/sabre/xml/composer.json
@@ -45,7 +45,7 @@
     },
     "require-dev": {
         "sabre/cs": "~1.0.0",
-        "phpunit/phpunit" : "*"
+        "phpunit/phpunit" : "~4.8|~5.7"
     },
     "config" : {
         "bin-dir" : "bin/"
diff --git a/vendor/sabre/xml/lib/Deserializer/functions.php b/vendor/sabre/xml/lib/Deserializer/functions.php
index 2e5d877e9..07038d99a 100644
--- a/vendor/sabre/xml/lib/Deserializer/functions.php
+++ b/vendor/sabre/xml/lib/Deserializer/functions.php
@@ -66,9 +66,20 @@ function keyValue(Reader $reader, $namespace = null) {
         return [];
     }
 
+    if (!$reader->read()) {
+        $reader->next();
+
+        return [];
+    }
+
+    if (Reader::END_ELEMENT === $reader->nodeType) {
+        $reader->next();
+
+        return [];
+    }
+
     $values = [];
 
-    $reader->read();
     do {
 
         if ($reader->nodeType === Reader::ELEMENT) {
@@ -79,7 +90,9 @@ function keyValue(Reader $reader, $namespace = null) {
                 $values[$clark] = $reader->parseCurrentElement()['value'];
             }
         } else {
-            $reader->read();
+            if (!$reader->read()) {
+                break;
+            }
         }
     } while ($reader->nodeType !== Reader::END_ELEMENT);
 
@@ -144,7 +157,17 @@ function enum(Reader $reader, $namespace = null) {
         $reader->next();
         return [];
     }
-    $reader->read();
+    if (!$reader->read()) {
+        $reader->next();
+
+        return [];
+    }
+
+    if (Reader::END_ELEMENT === $reader->nodeType) {
+        $reader->next();
+
+        return [];
+    }
     $currentDepth = $reader->depth;
 
     $values = [];
@@ -204,7 +227,9 @@ function valueObject(Reader $reader, $className, $namespace) {
                 $reader->next();
             }
         } else {
-            $reader->read();
+            if (!$reader->read()) {
+                break;
+            }
         }
     } while ($reader->nodeType !== Reader::END_ELEMENT);
 
diff --git a/vendor/sabre/xml/lib/Service.php b/vendor/sabre/xml/lib/Service.php
index 09ee341cf..acea94ea9 100644
--- a/vendor/sabre/xml/lib/Service.php
+++ b/vendor/sabre/xml/lib/Service.php
@@ -138,7 +138,8 @@ class Service {
      * @param string|string[] $rootElementName
      * @param string|resource $input
      * @param string|null $contextUri
-     * @return void
+     * @throws ParseException
+     * @return array|object|string
      */
     function expect($rootElementName, $input, $contextUri = null) {