⬆️ 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)

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);