:arrow_up: Update libraries.

michelf/php-markdown (1.7.0 => 1.8.0)
ezyang/htmlpurifier (v4.9.3 => v4.10.0)
commerceguys/intl (v0.7.4 => v0.7.5)
sabre/http (4.2.3 => v4.2.4)
sabre/vobject (4.1.3 => 4.1.5)

14 files changed, 62 insertions, 26 deletions

diff --git a/vendor/sabre/http/.travis.yml b/vendor/sabre/http/.travis.yml
index 8ae84d90f..9e4964b9d 100644
--- a/vendor/sabre/http/.travis.yml
+++ b/vendor/sabre/http/.travis.yml
@@ -9,6 +9,8 @@ php:
 
 matrix:
   fast_finish: true
+  allow_failures:
+  - php: hhvm
 
 env:
   matrix:
diff --git a/vendor/sabre/http/CHANGELOG.md b/vendor/sabre/http/CHANGELOG.md
index 00be2d887..d3dd8b2d9 100644
--- a/vendor/sabre/http/CHANGELOG.md
+++ b/vendor/sabre/http/CHANGELOG.md
@@ -1,6 +1,13 @@
 ChangeLog
 =========
 
+4.2.4 (2018-02-23)
+------------------
+
+* #69: Sending `charset="UTF-8"` on Basic authentication challenges per
+  [rfc7617][rfc7617].
+
+
 4.2.3 (2017-06-12)
 ------------------
 
@@ -12,7 +19,6 @@ ChangeLog
 
 * #72: Handling clients that send invalid `Content-Length` headers.
 
-
 4.2.1 (2016-01-06)
 ------------------
 
@@ -259,4 +265,5 @@ Before 2.0.0, this package was built-into SabreDAV, where it first appeared in
 January 2009.
 
 [psr-http]: https://github.com/php-fig/fig-standards/blob/master/proposed/http-message.md
-[rfc-7240]: http://tools.ietf.org/html/rfc7240
+[rfc7240]: http://tools.ietf.org/html/rfc7240
+[rfc7617]: https://tools.ietf.org/html/rfc7617
diff --git a/vendor/sabre/http/lib/Auth/Basic.php b/vendor/sabre/http/lib/Auth/Basic.php
index 60633b957..c263e3f9b 100644
--- a/vendor/sabre/http/lib/Auth/Basic.php
+++ b/vendor/sabre/http/lib/Auth/Basic.php
@@ -55,7 +55,7 @@ class Basic extends AbstractAuth {
      */
     function requireLogin() {
 
-        $this->response->addHeader('WWW-Authenticate', 'Basic realm="' . $this->realm . '"');
+        $this->response->addHeader('WWW-Authenticate', 'Basic realm="' . $this->realm . '", charset="UTF-8"');
         $this->response->setStatus(401);
 
     }
diff --git a/vendor/sabre/http/lib/Sapi.php b/vendor/sabre/http/lib/Sapi.php
index 6fc6452e4..054380e73 100644
--- a/vendor/sabre/http/lib/Sapi.php
+++ b/vendor/sabre/http/lib/Sapi.php
@@ -77,12 +77,12 @@ class Sapi {
             if (is_resource($body) && get_resource_type($body) == 'stream') {
                 if (PHP_INT_SIZE !== 4){
                     // use the dedicated function on 64 Bit systems
-                    stream_copy_to_stream($body, $output, $contentLength);  
+                    stream_copy_to_stream($body, $output, $contentLength);
                 } else {
                     // workaround for 32 Bit systems to avoid stream_copy_to_stream
                     while (!feof($body)) {
-                        fwrite($output, fread($body, 8192));    
-                    }   
+                        fwrite($output, fread($body, 8192));
+                    }
                 }
             } else {
                 fwrite($output, $body, $contentLength);
diff --git a/vendor/sabre/http/lib/Version.php b/vendor/sabre/http/lib/Version.php
index aeb080e93..c40532ae8 100644
--- a/vendor/sabre/http/lib/Version.php
+++ b/vendor/sabre/http/lib/Version.php
@@ -14,6 +14,6 @@ class Version {
     /**
      * Full version number
      */
-    const VERSION = '4.2.3';
+    const VERSION = '4.2.4';
 
 }
diff --git a/vendor/sabre/vobject/CHANGELOG.md b/vendor/sabre/vobject/CHANGELOG.md
index 56a36f99c..269b3dbff 100644
--- a/vendor/sabre/vobject/CHANGELOG.md
+++ b/vendor/sabre/vobject/CHANGELOG.md
@@ -1,6 +1,22 @@
 ChangeLog
 =========
 
+4.1.5 (2018-03-08)
+------------------
+
+* Serialization: Performance boost for long properties (@gharlan)
+
+4.1.4 (2017-12-22)
+------------------
+
+* #383: Fix possible infinite loop in RRuleIterator, when the RRule FREQ
+  is YEARLY and it uses BYYEARDAY only (@mvdnes).
+* #392: Improved significant change detection. This should reduce the number of
+  unneeded update emails in scheduling systems. (@alecpl).
+* #395: Removed `Canada/East-Saskatchewan` timezone, as it got removed
+  from PHP as well. (@remicollet).
+
+
 4.1.3 (2017-10-18)
 ------------------
 
diff --git a/vendor/sabre/vobject/composer.json b/vendor/sabre/vobject/composer.json
index 1f22f6de1..2407cabb1 100644
--- a/vendor/sabre/vobject/composer.json
+++ b/vendor/sabre/vobject/composer.json
@@ -37,7 +37,7 @@
         "sabre/xml"    : ">=1.5 <3.0"
     },
     "require-dev" : {
-        "phpunit/phpunit" : "> 4.8, <6.0.0",
+        "phpunit/phpunit" : "> 4.8.35, <6.0.0",
         "sabre/cs"        : "^1.0.0"
 
     },
diff --git a/vendor/sabre/vobject/lib/ITip/Broker.php b/vendor/sabre/vobject/lib/ITip/Broker.php
index effa74317..b9a30611b 100644
--- a/vendor/sabre/vobject/lib/ITip/Broker.php
+++ b/vendor/sabre/vobject/lib/ITip/Broker.php
@@ -849,6 +849,7 @@ class Broker {
         $exdate = [];
 
         foreach ($calendar->VEVENT as $vevent) {
+            $rrule = [];
 
             if (is_null($uid)) {
                 $uid = $vevent->UID->getValue();
@@ -889,6 +890,18 @@ class Broker {
                 }
                 sort($exdate);
             }
+            if (isset($vevent->RRULE)) {
+                foreach ($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) {
+                            continue;
+                        }
+                        $rrule[] = "$key=$val";
+                    }
+                }
+                sort($rrule);
+            }
             if (isset($vevent->STATUS)) {
                 $status = strtoupper($vevent->STATUS->getValue());
             }
@@ -953,19 +966,16 @@ class Broker {
                     $significantChangeHash .= $prop . ':';
 
                     if ($prop === 'EXDATE') {
-
                         $significantChangeHash .= implode(',', $exdate) . ';';
-
+                    } elseif ($prop === 'RRULE') {
+                        $significantChangeHash .= implode(',', $rrule) . ';';
                     } else {
-
                         foreach ($propertyValues as $val) {
                             $significantChangeHash .= $val->getValue() . ';';
                         }
-
                     }
                 }
             }
-
         }
         $significantChangeHash = md5($significantChangeHash);
 
diff --git a/vendor/sabre/vobject/lib/Parser/MimeDir.php b/vendor/sabre/vobject/lib/Parser/MimeDir.php
index fa75a1a3b..78e5bf385 100644
--- a/vendor/sabre/vobject/lib/Parser/MimeDir.php
+++ b/vendor/sabre/vobject/lib/Parser/MimeDir.php
@@ -464,13 +464,13 @@ class MimeDir extends Parser {
                 // vCard 2.1 allows the character set to be specified per property.
                 $charset = (string)$propObj['CHARSET'];
             }
-            switch ($charset) {
-                case 'UTF-8' :
+            switch (strtolower($charset)) {
+                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 :
diff --git a/vendor/sabre/vobject/lib/Property.php b/vendor/sabre/vobject/lib/Property.php
index 1aaa3ed58..96855f1f7 100644
--- a/vendor/sabre/vobject/lib/Property.php
+++ b/vendor/sabre/vobject/lib/Property.php
@@ -249,8 +249,9 @@ abstract class Property extends Node {
         $out = '';
         while (strlen($str) > 0) {
             if (strlen($str) > 75) {
-                $out .= mb_strcut($str, 0, 75, 'utf-8') . "\r\n";
-                $str = ' ' . mb_strcut($str, 75, strlen($str), 'utf-8');
+                $part = mb_strcut($str, 0, 75, 'utf-8');
+                $out .= $part . "\r\n";
+                $str = ' ' . substr($str, strlen($part));
             } else {
                 $out .= $str . "\r\n";
                 $str = '';
diff --git a/vendor/sabre/vobject/lib/Property/Text.php b/vendor/sabre/vobject/lib/Property/Text.php
index 476dcde4d..bb7ab34ee 100644
--- a/vendor/sabre/vobject/lib/Property/Text.php
+++ b/vendor/sabre/vobject/lib/Property/Text.php
@@ -275,8 +275,9 @@ class Text extends Property {
             $out = '';
             while (strlen($str) > 0) {
                 if (strlen($str) > 75) {
-                    $out .= mb_strcut($str, 0, 75, 'utf-8') . "\r\n";
-                    $str = ' ' . mb_strcut($str, 75, strlen($str), 'utf-8');
+                    $part = mb_strcut($str, 0, 75, 'utf-8');
+                    $out .= $part . "\r\n";
+                    $str = ' ' . substr($str, strlen($part));
                 } else {
                     $out .= $str . "\r\n";
                     $str = '';
diff --git a/vendor/sabre/vobject/lib/Recur/RRuleIterator.php b/vendor/sabre/vobject/lib/Recur/RRuleIterator.php
index 20f34ef42..dbea1155d 100644
--- a/vendor/sabre/vobject/lib/Recur/RRuleIterator.php
+++ b/vendor/sabre/vobject/lib/Recur/RRuleIterator.php
@@ -592,11 +592,11 @@ class RRuleIterator implements Iterator {
                     // loop through all YearDay and Days to check all the combinations
                     foreach ($this->byYearDay as $byYearDay) {
                         $date = clone $this->currentDate;
-                        $date->setDate($currentYear, 1, 1);
+                        $date = $date->setDate($currentYear, 1, 1);
                         if ($byYearDay > 0) {
-                            $date->add(new \DateInterval('P' . $byYearDay . 'D'));
+                            $date = $date->add(new \DateInterval('P' . $byYearDay . 'D'));
                         } else {
-                            $date->sub(new \DateInterval('P' . abs($byYearDay) . 'D'));
+                            $date = $date->sub(new \DateInterval('P' . abs($byYearDay) . 'D'));
                         }
 
                         if ($date > $this->currentDate && in_array($date->format('N'), $dayOffsets)) {
diff --git a/vendor/sabre/vobject/lib/Version.php b/vendor/sabre/vobject/lib/Version.php
index 24c51a604..67e8a4037 100644
--- a/vendor/sabre/vobject/lib/Version.php
+++ b/vendor/sabre/vobject/lib/Version.php
@@ -14,6 +14,6 @@ class Version {
     /**
      * Full version number.
      */
-    const VERSION = '4.1.3';
+    const VERSION = '4.1.5';
 
 }
diff --git a/vendor/sabre/vobject/lib/timezonedata/php-bc.php b/vendor/sabre/vobject/lib/timezonedata/php-bc.php
index 906ccb0e4..83f38f507 100644
--- a/vendor/sabre/vobject/lib/timezonedata/php-bc.php
+++ b/vendor/sabre/vobject/lib/timezonedata/php-bc.php
@@ -68,7 +68,6 @@ return [
     'Brazil/West',
     'Canada/Atlantic',
     'Canada/Central',
-    'Canada/East-Saskatchewan',
     'Canada/Eastern',
     'Canada/Mountain',
     'Canada/Newfoundland',