another bulk of composer updates

(cherry picked from commit 6685381fd8db507493c3d7c1793f8c05c681bbce)

21 files changed, 421 insertions, 479 deletions

diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php
index 9669be304..0d53aeda3 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CalendarData.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -25,8 +27,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarData implements XmlDeserializable {
-
+class CalendarData implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -46,24 +48,24 @@ class CalendarData implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
             'contentType' => $reader->getAttribute('content-type') ?: 'text/calendar',
-            'version'     => $reader->getAttribute('version') ?: '2.0',
+            'version' => $reader->getAttribute('version') ?: '2.0',
         ];
 
-        $elems = (array)$reader->parseInnerTree();
+        $elems = (array) $reader->parseInnerTree();
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-                case '{' . Plugin::NS_CALDAV . '}expand' :
+                case '{'.Plugin::NS_CALDAV.'}expand':
 
                     $result['expand'] = [
                         'start' => isset($elem['attributes']['start']) ? DateTimeParser::parseDateTime($elem['attributes']['start']) : null,
-                        'end'   => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
+                        'end' => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
                     ];
 
                     if (!$result['expand']['start'] || !$result['expand']['end']) {
@@ -74,11 +76,8 @@ class CalendarData implements XmlDeserializable {
                     }
                     break;
             }
-
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php
index c21ede66b..832346eea 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/CompFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -22,8 +24,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CompFilter implements XmlDeserializable {
-
+class CompFilter implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -43,16 +45,17 @@ class CompFilter implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
+            'name' => null,
             'is-not-defined' => false,
-            'comp-filters'   => [],
-            'prop-filters'   => [],
-            'time-range'     => false,
+            'comp-filters' => [],
+            'prop-filters' => [],
+            'time-range' => false,
         ];
 
         $att = $reader->parseAttributes();
@@ -60,38 +63,34 @@ class CompFilter implements XmlDeserializable {
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALDAV . '}comp-filter' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CALDAV.'}comp-filter':
                     $result['comp-filters'][] = $elem['value'];
                     break;
-                case '{' . Plugin::NS_CALDAV . '}prop-filter' :
+                case '{'.Plugin::NS_CALDAV.'}prop-filter':
                     $result['prop-filters'][] = $elem['value'];
                     break;
-                case '{' . Plugin::NS_CALDAV . '}is-not-defined' :
+                case '{'.Plugin::NS_CALDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CALDAV . '}time-range' :
-                    if ($result['name'] === 'VCALENDAR') {
+                case '{'.Plugin::NS_CALDAV.'}time-range':
+                    if ('VCALENDAR' === $result['name']) {
                         throw new BadRequest('You cannot add time-range filters on the VCALENDAR component');
                     }
                     $result['time-range'] = [
                         'start' => isset($elem['attributes']['start']) ? DateTimeParser::parseDateTime($elem['attributes']['start']) : null,
-                        'end'   => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
+                        'end' => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
                     ];
                     if ($result['time-range']['start'] && $result['time-range']['end'] && $result['time-range']['end'] <= $result['time-range']['start']) {
                         throw new BadRequest('The end-date must be larger than the start-date');
                     }
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php
index bf422cf05..ec9ff753c 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/ParamFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -20,8 +22,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ParamFilter implements XmlDeserializable {
-
+class ParamFilter implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -41,14 +43,15 @@ class ParamFilter implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
+            'name' => null,
             'is-not-defined' => false,
-            'text-match'     => null,
+            'text-match' => null,
         ];
 
         $att = $reader->parseAttributes();
@@ -56,27 +59,23 @@ class ParamFilter implements XmlDeserializable {
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALDAV . '}is-not-defined' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CALDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CALDAV . '}text-match' :
+                case '{'.Plugin::NS_CALDAV.'}text-match':
                     $result['text-match'] = [
-                        'negate-condition' => isset($elem['attributes']['negate-condition']) && $elem['attributes']['negate-condition'] === 'yes',
-                        'collation'        => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
-                        'value'            => $elem['value'],
+                        'negate-condition' => isset($elem['attributes']['negate-condition']) && 'yes' === $elem['attributes']['negate-condition'],
+                        'collation' => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
+                        'value' => $elem['value'],
                     ];
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php
index db9207295..f4600574e 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Filter/PropFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Filter;
 
 use Sabre\CalDAV\Plugin;
@@ -22,8 +24,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PropFilter implements XmlDeserializable {
-
+class PropFilter implements XmlDeserializable
+{
     /**
      * The deserialize method is called during xml parsing.
      *
@@ -43,16 +45,17 @@ class PropFilter implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $result = [
-            'name'           => null,
+            'name' => null,
             'is-not-defined' => false,
-            'param-filters'  => [],
-            'text-match'     => null,
-            'time-range'     => false,
+            'param-filters' => [],
+            'text-match' => null,
+            'time-range' => false,
         ];
 
         $att = $reader->parseAttributes();
@@ -60,39 +63,35 @@ class PropFilter implements XmlDeserializable {
 
         $elems = $reader->parseInnerTree();
 
-        if (is_array($elems)) foreach ($elems as $elem) {
-
-            switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALDAV . '}param-filter' :
+        if (is_array($elems)) {
+            foreach ($elems as $elem) {
+                switch ($elem['name']) {
+                case '{'.Plugin::NS_CALDAV.'}param-filter':
                     $result['param-filters'][] = $elem['value'];
                     break;
-                case '{' . Plugin::NS_CALDAV . '}is-not-defined' :
+                case '{'.Plugin::NS_CALDAV.'}is-not-defined':
                     $result['is-not-defined'] = true;
                     break;
-                case '{' . Plugin::NS_CALDAV . '}time-range' :
+                case '{'.Plugin::NS_CALDAV.'}time-range':
                     $result['time-range'] = [
                         'start' => isset($elem['attributes']['start']) ? DateTimeParser::parseDateTime($elem['attributes']['start']) : null,
-                        'end'   => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
+                        'end' => isset($elem['attributes']['end']) ? DateTimeParser::parseDateTime($elem['attributes']['end']) : null,
                     ];
                     if ($result['time-range']['start'] && $result['time-range']['end'] && $result['time-range']['end'] <= $result['time-range']['start']) {
                         throw new BadRequest('The end-date must be larger than the start-date');
                     }
                     break;
-                case '{' . Plugin::NS_CALDAV . '}text-match' :
+                case '{'.Plugin::NS_CALDAV.'}text-match':
                     $result['text-match'] = [
-                        'negate-condition' => isset($elem['attributes']['negate-condition']) && $elem['attributes']['negate-condition'] === 'yes',
-                        'collation'        => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
-                        'value'            => $elem['value'],
+                        'negate-condition' => isset($elem['attributes']['negate-condition']) && 'yes' === $elem['attributes']['negate-condition'],
+                        'collation' => isset($elem['attributes']['collation']) ? $elem['attributes']['collation'] : 'i;ascii-casemap',
+                        'value' => $elem['value'],
                     ];
                     break;
-
             }
-
+            }
         }
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
index 92a9ac7b7..926656674 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\CalDAV;
@@ -17,19 +19,19 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Invite implements NotificationInterface {
-
+class Invite implements NotificationInterface
+{
     /**
-     * A unique id for the message
+     * A unique id for the message.
      *
      * @var string
      */
     protected $id;
 
     /**
-     * Timestamp of the notification
+     * Timestamp of the notification.
      *
-     * @var DateTime
+     * @var \DateTime
      */
     protected $dtStamp;
 
@@ -63,7 +65,7 @@ class Invite implements NotificationInterface {
     protected $hostUrl;
 
     /**
-     * Url to the sharer of the calendar
+     * Url to the sharer of the calendar.
      *
      * @var string
      */
@@ -91,21 +93,21 @@ class Invite implements NotificationInterface {
     protected $lastName;
 
     /**
-     * A description of the share request
+     * A description of the share request.
      *
      * @var string
      */
     protected $summary;
 
     /**
-     * The Etag for the notification
+     * The Etag for the notification.
      *
      * @var string
      */
     protected $etag;
 
     /**
-     * The list of supported components
+     * The list of supported components.
      *
      * @var CalDAV\Xml\Property\SupportedCalendarComponentSet
      */
@@ -138,8 +140,8 @@ class Invite implements NotificationInterface {
      *
      * @param array $values All the options
      */
-    function __construct(array $values) {
-
+    public function __construct(array $values)
+    {
         $required = [
             'id',
             'etag',
@@ -152,17 +154,16 @@ class Invite implements NotificationInterface {
         ];
         foreach ($required as $item) {
             if (!isset($values[$item])) {
-                throw new \InvalidArgumentException($item . ' is a required constructor option');
+                throw new \InvalidArgumentException($item.' is a required constructor option');
             }
         }
 
         foreach ($values as $key => $value) {
             if (!property_exists($this, $key)) {
-                throw new \InvalidArgumentException('Unknown option: ' . $key);
+                throw new \InvalidArgumentException('Unknown option: '.$key);
             }
             $this->$key = $value;
         }
-
     }
 
     /**
@@ -182,12 +183,10 @@ class Invite implements NotificationInterface {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $writer->writeElement('{' . CalDAV\Plugin::NS_CALENDARSERVER . '}invite-notification');
-
+    public function xmlSerialize(Writer $writer)
+    {
+        $writer->writeElement('{'.CalDAV\Plugin::NS_CALENDARSERVER.'}invite-notification');
     }
 
     /**
@@ -195,95 +194,90 @@ class Invite implements NotificationInterface {
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer) {
+    public function xmlSerializeFull(Writer $writer)
+    {
+        $cs = '{'.CalDAV\Plugin::NS_CALENDARSERVER.'}';
 
-        $cs = '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}';
+        $this->dtStamp->setTimezone(new \DateTimeZone('GMT'));
+        $writer->writeElement($cs.'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
 
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $writer->writeElement($cs . 'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
+        $writer->startElement($cs.'invite-notification');
 
-        $writer->startElement($cs . 'invite-notification');
-
-        $writer->writeElement($cs . 'uid', $this->id);
+        $writer->writeElement($cs.'uid', $this->id);
         $writer->writeElement('{DAV:}href', $this->href);
 
         switch ($this->type) {
-
-            case DAV\Sharing\Plugin::INVITE_ACCEPTED :
-                $writer->writeElement($cs . 'invite-accepted');
+            case DAV\Sharing\Plugin::INVITE_ACCEPTED:
+                $writer->writeElement($cs.'invite-accepted');
                 break;
-            case DAV\Sharing\Plugin::INVITE_NORESPONSE :
-                $writer->writeElement($cs . 'invite-noresponse');
+            case DAV\Sharing\Plugin::INVITE_NORESPONSE:
+                $writer->writeElement($cs.'invite-noresponse');
                 break;
-
         }
 
-        $writer->writeElement($cs . 'hosturl', [
-            '{DAV:}href' => $writer->contextUri . $this->hostUrl
+        $writer->writeElement($cs.'hosturl', [
+            '{DAV:}href' => $writer->contextUri.$this->hostUrl,
             ]);
 
         if ($this->summary) {
-            $writer->writeElement($cs . 'summary', $this->summary);
+            $writer->writeElement($cs.'summary', $this->summary);
         }
 
-        $writer->startElement($cs . 'access');
+        $writer->startElement($cs.'access');
         if ($this->readOnly) {
-            $writer->writeElement($cs . 'read');
+            $writer->writeElement($cs.'read');
         } else {
-            $writer->writeElement($cs . 'read-write');
+            $writer->writeElement($cs.'read-write');
         }
         $writer->endElement(); // access
 
-        $writer->startElement($cs . 'organizer');
+        $writer->startElement($cs.'organizer');
         // If the organizer contains a 'mailto:' part, it means it should be
         // treated as absolute.
-        if (strtolower(substr($this->organizer, 0, 7)) === 'mailto:') {
+        if ('mailto:' === strtolower(substr($this->organizer, 0, 7))) {
             $writer->writeElement('{DAV:}href', $this->organizer);
         } else {
-            $writer->writeElement('{DAV:}href', $writer->contextUri . $this->organizer);
+            $writer->writeElement('{DAV:}href', $writer->contextUri.$this->organizer);
         }
         if ($this->commonName) {
-            $writer->writeElement($cs . 'common-name', $this->commonName);
+            $writer->writeElement($cs.'common-name', $this->commonName);
         }
         if ($this->firstName) {
-            $writer->writeElement($cs . 'first-name', $this->firstName);
+            $writer->writeElement($cs.'first-name', $this->firstName);
         }
         if ($this->lastName) {
-            $writer->writeElement($cs . 'last-name', $this->lastName);
+            $writer->writeElement($cs.'last-name', $this->lastName);
         }
         $writer->endElement(); // organizer
 
         if ($this->commonName) {
-            $writer->writeElement($cs . 'organizer-cn', $this->commonName);
+            $writer->writeElement($cs.'organizer-cn', $this->commonName);
         }
         if ($this->firstName) {
-            $writer->writeElement($cs . 'organizer-first', $this->firstName);
+            $writer->writeElement($cs.'organizer-first', $this->firstName);
         }
         if ($this->lastName) {
-            $writer->writeElement($cs . 'organizer-last', $this->lastName);
+            $writer->writeElement($cs.'organizer-last', $this->lastName);
         }
         if ($this->supportedComponents) {
-            $writer->writeElement('{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set', $this->supportedComponents);
+            $writer->writeElement('{'.CalDAV\Plugin::NS_CALDAV.'}supported-calendar-component-set', $this->supportedComponents);
         }
 
         $writer->endElement(); // invite-notification
-
     }
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId() {
-
+    public function getId()
+    {
         return $this->id;
-
     }
 
     /**
@@ -293,10 +287,8 @@ class Invite implements NotificationInterface {
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return $this->etag;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
index f4b10a396..abcbde151 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\CalDAV;
@@ -14,19 +16,19 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InviteReply implements NotificationInterface {
-
+class InviteReply implements NotificationInterface
+{
     /**
-     * A unique id for the message
+     * A unique id for the message.
      *
      * @var string
      */
     protected $id;
 
     /**
-     * Timestamp of the notification
+     * Timestamp of the notification.
      *
-     * @var DateTime
+     * @var \DateTime
      */
     protected $dtStamp;
 
@@ -59,14 +61,14 @@ class InviteReply implements NotificationInterface {
     protected $hostUrl;
 
     /**
-     * A description of the share request
+     * A description of the share request.
      *
      * @var string
      */
     protected $summary;
 
     /**
-     * Notification Etag
+     * Notification Etag.
      *
      * @var string
      */
@@ -90,8 +92,8 @@ class InviteReply implements NotificationInterface {
      *
      * @param array $values
      */
-    function __construct(array $values) {
-
+    public function __construct(array $values)
+    {
         $required = [
             'id',
             'etag',
@@ -103,17 +105,16 @@ class InviteReply implements NotificationInterface {
         ];
         foreach ($required as $item) {
             if (!isset($values[$item])) {
-                throw new \InvalidArgumentException($item . ' is a required constructor option');
+                throw new \InvalidArgumentException($item.' is a required constructor option');
             }
         }
 
         foreach ($values as $key => $value) {
             if (!property_exists($this, $key)) {
-                throw new \InvalidArgumentException('Unknown option: ' . $key);
+                throw new \InvalidArgumentException('Unknown option: '.$key);
             }
             $this->$key = $value;
         }
-
     }
 
     /**
@@ -133,12 +134,10 @@ class InviteReply implements NotificationInterface {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $writer->writeElement('{' . CalDAV\Plugin::NS_CALENDARSERVER . '}invite-reply');
-
+    public function xmlSerialize(Writer $writer)
+    {
+        $writer->writeElement('{'.CalDAV\Plugin::NS_CALENDARSERVER.'}invite-reply');
     }
 
     /**
@@ -146,55 +145,50 @@ class InviteReply implements NotificationInterface {
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer) {
+    public function xmlSerializeFull(Writer $writer)
+    {
+        $cs = '{'.CalDAV\Plugin::NS_CALENDARSERVER.'}';
 
-        $cs = '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}';
+        $this->dtStamp->setTimezone(new \DateTimeZone('GMT'));
+        $writer->writeElement($cs.'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
 
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $writer->writeElement($cs . 'dtstamp', $this->dtStamp->format('Ymd\\THis\\Z'));
+        $writer->startElement($cs.'invite-reply');
 
-        $writer->startElement($cs . 'invite-reply');
-
-        $writer->writeElement($cs . 'uid', $this->id);
-        $writer->writeElement($cs . 'in-reply-to', $this->inReplyTo);
+        $writer->writeElement($cs.'uid', $this->id);
+        $writer->writeElement($cs.'in-reply-to', $this->inReplyTo);
         $writer->writeElement('{DAV:}href', $this->href);
 
         switch ($this->type) {
-
-            case DAV\Sharing\Plugin::INVITE_ACCEPTED :
-                $writer->writeElement($cs . 'invite-accepted');
+            case DAV\Sharing\Plugin::INVITE_ACCEPTED:
+                $writer->writeElement($cs.'invite-accepted');
                 break;
-            case DAV\Sharing\Plugin::INVITE_DECLINED :
-                $writer->writeElement($cs . 'invite-declined');
+            case DAV\Sharing\Plugin::INVITE_DECLINED:
+                $writer->writeElement($cs.'invite-declined');
                 break;
-
         }
 
-        $writer->writeElement($cs . 'hosturl', [
-            '{DAV:}href' => $writer->contextUri . $this->hostUrl
+        $writer->writeElement($cs.'hosturl', [
+            '{DAV:}href' => $writer->contextUri.$this->hostUrl,
             ]);
 
         if ($this->summary) {
-            $writer->writeElement($cs . 'summary', $this->summary);
+            $writer->writeElement($cs.'summary', $this->summary);
         }
         $writer->endElement(); // invite-reply
-
     }
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId() {
-
+    public function getId()
+    {
         return $this->id;
-
     }
 
     /**
@@ -204,10 +198,8 @@ class InviteReply implements NotificationInterface {
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return $this->etag;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php
index b98f9c888..be7490533 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/NotificationInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\Xml\Writer;
@@ -12,26 +14,25 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface NotificationInterface extends XmlSerializable {
-
+interface NotificationInterface extends XmlSerializable
+{
     /**
      * This method serializes the entire notification, as it is used in the
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer);
+    public function xmlSerializeFull(Writer $writer);
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId();
+    public function getId();
 
     /**
      * Returns the ETag for this notification.
@@ -40,6 +41,5 @@ interface NotificationInterface extends XmlSerializable {
      *
      * @return string
      */
-    function getETag();
-
+    public function getETag();
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php
index 8c945dd68..3c656df34 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/SystemStatus.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Notification;
 
 use Sabre\CalDAV\Plugin;
 use Sabre\Xml\Writer;
 
 /**
- * SystemStatus notification
+ * SystemStatus notification.
  *
  * This notification can be used to indicate to the user that the system is
  * down.
@@ -15,14 +17,14 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SystemStatus implements NotificationInterface {
-
+class SystemStatus implements NotificationInterface
+{
     const TYPE_LOW = 1;
     const TYPE_MEDIUM = 2;
     const TYPE_HIGH = 3;
 
     /**
-     * A unique id
+     * A unique id.
      *
      * @var string
      */
@@ -50,7 +52,7 @@ class SystemStatus implements NotificationInterface {
     protected $href;
 
     /**
-     * Notification Etag
+     * Notification Etag.
      *
      * @var string
      */
@@ -64,18 +66,17 @@ class SystemStatus implements NotificationInterface {
      *
      * @param string $id
      * @param string $etag
-     * @param int $type
+     * @param int    $type
      * @param string $description
      * @param string $href
      */
-    function __construct($id, $etag, $type = self::TYPE_HIGH, $description = null, $href = null) {
-
+    public function __construct($id, $etag, $type = self::TYPE_HIGH, $description = null, $href = null)
+    {
         $this->id = $id;
         $this->type = $type;
         $this->description = $description;
         $this->href = $href;
         $this->etag = $etag;
-
     }
 
     /**
@@ -91,27 +92,25 @@ class SystemStatus implements NotificationInterface {
      * responsible for closing them.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         switch ($this->type) {
-            case self::TYPE_LOW :
+            case self::TYPE_LOW:
                 $type = 'low';
                 break;
-            case self::TYPE_MEDIUM :
+            case self::TYPE_MEDIUM:
                 $type = 'medium';
                 break;
-            default :
-            case self::TYPE_HIGH :
+            default:
+            case self::TYPE_HIGH:
                 $type = 'high';
                 break;
         }
 
-        $writer->startElement('{' . Plugin::NS_CALENDARSERVER . '}systemstatus');
+        $writer->startElement('{'.Plugin::NS_CALENDARSERVER.'}systemstatus');
         $writer->writeAttribute('type', $type);
         $writer->endElement();
-
     }
 
     /**
@@ -119,51 +118,47 @@ class SystemStatus implements NotificationInterface {
      * response body.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerializeFull(Writer $writer) {
-
-        $cs = '{' . Plugin::NS_CALENDARSERVER . '}';
+    public function xmlSerializeFull(Writer $writer)
+    {
+        $cs = '{'.Plugin::NS_CALENDARSERVER.'}';
         switch ($this->type) {
-            case self::TYPE_LOW :
+            case self::TYPE_LOW:
                 $type = 'low';
                 break;
-            case self::TYPE_MEDIUM :
+            case self::TYPE_MEDIUM:
                 $type = 'medium';
                 break;
-            default :
-            case self::TYPE_HIGH :
+            default:
+            case self::TYPE_HIGH:
                 $type = 'high';
                 break;
         }
 
-        $writer->startElement($cs . 'systemstatus');
+        $writer->startElement($cs.'systemstatus');
         $writer->writeAttribute('type', $type);
 
-
         if ($this->description) {
-            $writer->writeElement($cs . 'description', $this->description);
+            $writer->writeElement($cs.'description', $this->description);
         }
         if ($this->href) {
             $writer->writeElement('{DAV:}href', $this->href);
         }
 
         $writer->endElement(); // systemstatus
-
     }
 
     /**
-     * Returns a unique id for this notification
+     * Returns a unique id for this notification.
      *
      * This is just the base url. This should generally be some kind of unique
      * id.
      *
      * @return string
      */
-    function getId() {
-
+    public function getId()
+    {
         return $this->id;
-
     }
 
     /*
@@ -173,10 +168,8 @@ class SystemStatus implements NotificationInterface {
      *
      * @return string
      */
-    function getETag() {
-
+    public function getETag()
+    {
         return $this->etag;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php
index 54e5a116a..224f52c96 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/AllowedSharingModes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -7,7 +9,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * AllowedSharingModes
+ * AllowedSharingModes.
  *
  * This property encodes the 'allowed-sharing-modes' property, as defined by
  * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
@@ -18,14 +20,15 @@ use Sabre\Xml\XmlSerializable;
  * such as VEVENT, VTODO
  *
  * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
+ *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class AllowedSharingModes implements XmlSerializable {
-
+class AllowedSharingModes implements XmlSerializable
+{
     /**
-     * Whether or not a calendar can be shared with another user
+     * Whether or not a calendar can be shared with another user.
      *
      * @var bool
      */
@@ -39,17 +42,15 @@ class AllowedSharingModes implements XmlSerializable {
     protected $canBePublished;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param bool $canBeShared
      * @param bool $canBePublished
-     * @return void
      */
-    function __construct($canBeShared, $canBePublished) {
-
+    public function __construct($canBeShared, $canBePublished)
+    {
         $this->canBeShared = $canBeShared;
         $this->canBePublished = $canBePublished;
-
     }
 
     /**
@@ -69,19 +70,14 @@ class AllowedSharingModes implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         if ($this->canBeShared) {
-            $writer->writeElement('{' . Plugin::NS_CALENDARSERVER . '}can-be-shared');
+            $writer->writeElement('{'.Plugin::NS_CALENDARSERVER.'}can-be-shared');
         }
         if ($this->canBePublished) {
-            $writer->writeElement('{' . Plugin::NS_CALENDARSERVER . '}can-be-published');
+            $writer->writeElement('{'.Plugin::NS_CALENDARSERVER.'}can-be-published');
         }
-
     }
-
-
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php
index fc6f1d505..6b28d5df2 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/EmailAddressSet.php
@@ -1,12 +1,14 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * email-address-set property
+ * email-address-set property.
  *
  * This property represents the email-address-set property in the
  * http://calendarserver.org/ns/ namespace.
@@ -17,35 +19,33 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class EmailAddressSet implements XmlSerializable {
-
+class EmailAddressSet implements XmlSerializable
+{
     /**
-     * emails
+     * emails.
      *
      * @var array
      */
     private $emails;
 
     /**
-     * __construct
+     * __construct.
      *
      * @param array $emails
      */
-    function __construct(array $emails) {
-
+    public function __construct(array $emails)
+    {
         $this->emails = $emails;
-
     }
 
     /**
-     * Returns the email addresses
+     * Returns the email addresses.
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->emails;
-
     }
 
     /**
@@ -65,16 +65,11 @@ class EmailAddressSet implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->emails as $email) {
-
             $writer->writeElement('{http://calendarserver.org/ns/}email-address', $email);
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
index 4f33c464c..db456617c 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -9,19 +11,20 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * Invite property
+ * Invite property.
  *
  * This property encodes the 'invite' property, as defined by
  * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
  * namespace.
  *
  * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
+ *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Invite implements XmlSerializable {
-
+class Invite implements XmlSerializable
+{
     /**
      * The list of users a calendar has been shared to.
      *
@@ -34,10 +37,9 @@ class Invite implements XmlSerializable {
      *
      * @param Sharee[] $sharees
      */
-    function __construct(array $sharees) {
-
+    public function __construct(array $sharees)
+    {
         $this->sharees = $sharees;
-
     }
 
     /**
@@ -45,10 +47,9 @@ class Invite implements XmlSerializable {
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->sharees;
-
     }
 
     /**
@@ -68,61 +69,54 @@ class Invite implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $cs = '{' . Plugin::NS_CALENDARSERVER . '}';
+    public function xmlSerialize(Writer $writer)
+    {
+        $cs = '{'.Plugin::NS_CALENDARSERVER.'}';
 
         foreach ($this->sharees as $sharee) {
-
-            if ($sharee->access === DAV\Sharing\Plugin::ACCESS_SHAREDOWNER) {
-                $writer->startElement($cs . 'organizer');
+            if (DAV\Sharing\Plugin::ACCESS_SHAREDOWNER === $sharee->access) {
+                $writer->startElement($cs.'organizer');
             } else {
-                $writer->startElement($cs . 'user');
+                $writer->startElement($cs.'user');
 
                 switch ($sharee->inviteStatus) {
-                    case DAV\Sharing\Plugin::INVITE_ACCEPTED :
-                        $writer->writeElement($cs . 'invite-accepted');
+                    case DAV\Sharing\Plugin::INVITE_ACCEPTED:
+                        $writer->writeElement($cs.'invite-accepted');
                         break;
-                    case DAV\Sharing\Plugin::INVITE_DECLINED :
-                        $writer->writeElement($cs . 'invite-declined');
+                    case DAV\Sharing\Plugin::INVITE_DECLINED:
+                        $writer->writeElement($cs.'invite-declined');
                         break;
-                    case DAV\Sharing\Plugin::INVITE_NORESPONSE :
-                        $writer->writeElement($cs . 'invite-noresponse');
+                    case DAV\Sharing\Plugin::INVITE_NORESPONSE:
+                        $writer->writeElement($cs.'invite-noresponse');
                         break;
-                    case DAV\Sharing\Plugin::INVITE_INVALID :
-                        $writer->writeElement($cs . 'invite-invalid');
+                    case DAV\Sharing\Plugin::INVITE_INVALID:
+                        $writer->writeElement($cs.'invite-invalid');
                         break;
                 }
 
-                $writer->startElement($cs . 'access');
+                $writer->startElement($cs.'access');
                 switch ($sharee->access) {
-                    case DAV\Sharing\Plugin::ACCESS_READWRITE :
-                        $writer->writeElement($cs . 'read-write');
+                    case DAV\Sharing\Plugin::ACCESS_READWRITE:
+                        $writer->writeElement($cs.'read-write');
                         break;
-                    case DAV\Sharing\Plugin::ACCESS_READ :
-                        $writer->writeElement($cs . 'read');
+                    case DAV\Sharing\Plugin::ACCESS_READ:
+                        $writer->writeElement($cs.'read');
                         break;
-
                 }
                 $writer->endElement(); // access
-
             }
 
             $href = new DAV\Xml\Property\Href($sharee->href);
             $href->xmlSerialize($writer);
 
             if (isset($sharee->properties['{DAV:}displayname'])) {
-                $writer->writeElement($cs . 'common-name', $sharee->properties['{DAV:}displayname']);
+                $writer->writeElement($cs.'common-name', $sharee->properties['{DAV:}displayname']);
             }
             if ($sharee->comment) {
-                $writer->writeElement($cs . 'summary', $sharee->comment);
+                $writer->writeElement($cs.'summary', $sharee->comment);
             }
             $writer->endElement(); // organizer or user
-
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
index 10c20be55..780907169 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -24,41 +26,39 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class ScheduleCalendarTransp implements Element {
-
+class ScheduleCalendarTransp implements Element
+{
     const TRANSPARENT = 'transparent';
     const OPAQUE = 'opaque';
 
     /**
-     * value
+     * value.
      *
      * @var string
      */
     protected $value;
 
     /**
-     * Creates the property
+     * Creates the property.
      *
      * @param string $value
      */
-    function __construct($value) {
-
-        if ($value !== self::TRANSPARENT && $value !== self::OPAQUE) {
+    public function __construct($value)
+    {
+        if (self::TRANSPARENT !== $value && self::OPAQUE !== $value) {
             throw new \InvalidArgumentException('The value must either be specified as "transparent" or "opaque"');
         }
         $this->value = $value;
-
     }
 
     /**
-     * Returns the current value
+     * Returns the current value.
      *
      * @return string
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->value;
-
     }
 
     /**
@@ -78,19 +78,17 @@ class ScheduleCalendarTransp implements Element {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         switch ($this->value) {
-            case self::TRANSPARENT :
-                $writer->writeElement('{' . Plugin::NS_CALDAV . '}transparent');
+            case self::TRANSPARENT:
+                $writer->writeElement('{'.Plugin::NS_CALDAV.'}transparent');
                 break;
-            case self::OPAQUE :
-                $writer->writeElement('{' . Plugin::NS_CALDAV . '}opaque');
+            case self::OPAQUE:
+                $writer->writeElement('{'.Plugin::NS_CALDAV.'}opaque');
                 break;
         }
-
     }
 
     /**
@@ -112,10 +110,11 @@ class ScheduleCalendarTransp implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = Deserializer\enum($reader, Plugin::NS_CALDAV);
 
         if (in_array('transparent', $elems)) {
@@ -123,8 +122,7 @@ class ScheduleCalendarTransp implements Element {
         } else {
             $value = self::OPAQUE;
         }
-        return new self($value);
 
+        return new self($value);
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php
index 7fc25c5f0..56fa61b13 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarComponentSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -21,8 +23,8 @@ use Sabre\Xml\Writer;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedCalendarComponentSet implements Element {
-
+class SupportedCalendarComponentSet implements Element
+{
     /**
      * List of supported components.
      *
@@ -37,21 +39,19 @@ class SupportedCalendarComponentSet implements Element {
      *
      * @param array $components
      */
-    function __construct(array $components) {
-
+    public function __construct(array $components)
+    {
         $this->components = $components;
-
     }
 
     /**
-     * Returns the list of supported components
+     * Returns the list of supported components.
      *
      * @return array
      */
-    function getValue() {
-
+    public function getValue()
+    {
         return $this->components;
-
     }
 
     /**
@@ -71,18 +71,14 @@ class SupportedCalendarComponentSet implements Element {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         foreach ($this->components as $component) {
-
-            $writer->startElement('{' . Plugin::NS_CALDAV . '}comp');
+            $writer->startElement('{'.Plugin::NS_CALDAV.'}comp');
             $writer->writeAttributes(['name' => $component]);
             $writer->endElement();
-
         }
-
     }
 
     /**
@@ -104,16 +100,17 @@ class SupportedCalendarComponentSet implements Element {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree();
 
         $components = [];
 
-        foreach ((array)$elems as $elem) {
-            if ($elem['name'] === '{' . Plugin::NS_CALDAV . '}comp') {
+        foreach ((array) $elems as $elem) {
+            if ($elem['name'] === '{'.Plugin::NS_CALDAV.'}comp') {
                 $components[] = $elem['attributes']['name'];
             }
         }
@@ -123,7 +120,5 @@ class SupportedCalendarComponentSet implements Element {
         }
 
         return new self($components);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php
index d123ba4c0..1c9c4779f 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCalendarData.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -7,7 +9,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * Supported-calendar-data property
+ * Supported-calendar-data property.
  *
  * This property is a representation of the supported-calendar-data property
  * in the CalDAV namespace. SabreDAV only has support for text/calendar;2.0
@@ -20,8 +22,8 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedCalendarData implements XmlSerializable {
-
+class SupportedCalendarData implements XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -39,22 +41,19 @@ class SupportedCalendarData implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
-        $writer->startElement('{' . Plugin::NS_CALDAV . '}calendar-data');
+    public function xmlSerialize(Writer $writer)
+    {
+        $writer->startElement('{'.Plugin::NS_CALDAV.'}calendar-data');
         $writer->writeAttributes([
             'content-type' => 'text/calendar',
-            'version'      => '2.0',
+            'version' => '2.0',
         ]);
         $writer->endElement(); // calendar-data
-        $writer->startElement('{' . Plugin::NS_CALDAV . '}calendar-data');
+        $writer->startElement('{'.Plugin::NS_CALDAV.'}calendar-data');
         $writer->writeAttributes([
             'content-type' => 'application/calendar+json',
         ]);
         $writer->endElement(); // calendar-data
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php
index af10860d0..b88cd0d92 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/SupportedCollationSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\CalDAV\Plugin;
@@ -7,7 +9,7 @@ use Sabre\Xml\Writer;
 use Sabre\Xml\XmlSerializable;
 
 /**
- * supported-collation-set property
+ * supported-collation-set property.
  *
  * This property is a representation of the supported-collation-set property
  * in the CalDAV namespace.
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlSerializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class SupportedCollationSet implements XmlSerializable {
-
+class SupportedCollationSet implements XmlSerializable
+{
     /**
      * The xmlSerialize method is called during xml writing.
      *
@@ -38,20 +40,17 @@ class SupportedCollationSet implements XmlSerializable {
      * If you are opening new elements, you must also close them again.
      *
      * @param Writer $writer
-     * @return void
      */
-    function xmlSerialize(Writer $writer) {
-
+    public function xmlSerialize(Writer $writer)
+    {
         $collations = [
             'i;ascii-casemap',
             'i;octet',
-            'i;unicode-casemap'
+            'i;unicode-casemap',
         ];
 
         foreach ($collations as $collation) {
-            $writer->writeElement('{' . Plugin::NS_CALDAV . '}supported-collation', $collation);
+            $writer->writeElement('{'.Plugin::NS_CALDAV.'}supported-collation', $collation);
         }
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php
index 6d3c5d508..8231de6bd 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarMultiGetReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarMultiGetReport implements XmlDeserializable {
-
+class CalendarMultiGetReport implements XmlDeserializable
+{
     /**
      * An array with requested properties.
      *
@@ -80,36 +82,33 @@ class CalendarMultiGetReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree([
             '{urn:ietf:params:xml:ns:caldav}calendar-data' => 'Sabre\\CalDAV\\Xml\\Filter\\CalendarData',
-            '{DAV:}prop'                                   => 'Sabre\\Xml\\Element\\KeyValue',
+            '{DAV:}prop' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $newProps = [
-            'hrefs'      => [],
+            'hrefs' => [],
             'properties' => [],
         ];
 
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $newProps['properties'] = array_keys($elem['value']);
-                    if (isset($elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'])) {
-                        $newProps += $elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'];
+                    if (isset($elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'])) {
+                        $newProps += $elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'];
                     }
                     break;
-                case '{DAV:}href' :
+                case '{DAV:}href':
                     $newProps['hrefs'][] = Uri\resolve($reader->contextUri, $elem['value']);
                     break;
-
             }
-
         }
 
         $obj = new self();
@@ -118,7 +117,5 @@ class CalendarMultiGetReport implements XmlDeserializable {
         }
 
         return $obj;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php
index e0b1c7950..e85eccd2d 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/CalendarQueryReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -19,8 +21,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://www.rooftopsolutions.nl/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarQueryReport implements XmlDeserializable {
-
+class CalendarQueryReport implements XmlDeserializable
+{
     /**
      * An array with requested properties.
      *
@@ -80,38 +82,39 @@ class CalendarQueryReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseInnerTree([
-            '{urn:ietf:params:xml:ns:caldav}comp-filter'   => 'Sabre\\CalDAV\\Xml\\Filter\\CompFilter',
-            '{urn:ietf:params:xml:ns:caldav}prop-filter'   => 'Sabre\\CalDAV\\Xml\\Filter\\PropFilter',
-            '{urn:ietf:params:xml:ns:caldav}param-filter'  => 'Sabre\\CalDAV\\Xml\\Filter\\ParamFilter',
+            '{urn:ietf:params:xml:ns:caldav}comp-filter' => 'Sabre\\CalDAV\\Xml\\Filter\\CompFilter',
+            '{urn:ietf:params:xml:ns:caldav}prop-filter' => 'Sabre\\CalDAV\\Xml\\Filter\\PropFilter',
+            '{urn:ietf:params:xml:ns:caldav}param-filter' => 'Sabre\\CalDAV\\Xml\\Filter\\ParamFilter',
             '{urn:ietf:params:xml:ns:caldav}calendar-data' => 'Sabre\\CalDAV\\Xml\\Filter\\CalendarData',
-            '{DAV:}prop'                                   => 'Sabre\\Xml\\Element\\KeyValue',
+            '{DAV:}prop' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $newProps = [
-            'filters'    => null,
+            'filters' => null,
             'properties' => [],
         ];
 
-        if (!is_array($elems)) $elems = [];
+        if (!is_array($elems)) {
+            $elems = [];
+        }
 
         foreach ($elems as $elem) {
-
             switch ($elem['name']) {
-
-                case '{DAV:}prop' :
+                case '{DAV:}prop':
                     $newProps['properties'] = array_keys($elem['value']);
-                    if (isset($elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'])) {
-                        $newProps += $elem['value']['{' . Plugin::NS_CALDAV . '}calendar-data'];
+                    if (isset($elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'])) {
+                        $newProps += $elem['value']['{'.Plugin::NS_CALDAV.'}calendar-data'];
                     }
                     break;
-                case '{' . Plugin::NS_CALDAV . '}filter' :
+                case '{'.Plugin::NS_CALDAV.'}filter':
                     foreach ($elem['value'] as $subElem) {
-                        if ($subElem['name'] === '{' . Plugin::NS_CALDAV . '}comp-filter') {
+                        if ($subElem['name'] === '{'.Plugin::NS_CALDAV.'}comp-filter') {
                             if (!is_null($newProps['filters'])) {
                                 throw new BadRequest('Only one top-level comp-filter may be defined');
                             }
@@ -119,21 +122,18 @@ class CalendarQueryReport implements XmlDeserializable {
                         }
                     }
                     break;
-
             }
-
         }
 
         if (is_null($newProps['filters'])) {
-            throw new BadRequest('The {' . Plugin::NS_CALDAV . '}filter element is required for this request');
+            throw new BadRequest('The {'.Plugin::NS_CALDAV.'}filter element is required for this request');
         }
 
         $obj = new self();
         foreach ($newProps as $key => $value) {
             $obj->$key = $value;
         }
-        return $obj;
 
+        return $obj;
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php
index 0f6c1e074..a4d98a8d4 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/FreeBusyQueryReport.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -9,7 +11,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 /**
- * FreeBusyQueryReport
+ * FreeBusyQueryReport.
  *
  * This class parses the {DAV:}free-busy-query REPORT, as defined in:
  *
@@ -19,19 +21,19 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class FreeBusyQueryReport implements XmlDeserializable {
-
+class FreeBusyQueryReport implements XmlDeserializable
+{
     /**
-     * Starttime of report
+     * Starttime of report.
      *
-     * @var DateTime|null
+     * @var \DateTime|null
      */
     public $start;
 
     /**
-     * End time of report
+     * End time of report.
      *
-     * @var DateTime|null
+     * @var \DateTime|null
      */
     public $end;
 
@@ -54,22 +56,23 @@ class FreeBusyQueryReport implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
-        $timeRange = '{' . Plugin::NS_CALDAV . '}time-range';
+    public static function xmlDeserialize(Reader $reader)
+    {
+        $timeRange = '{'.Plugin::NS_CALDAV.'}time-range';
 
         $start = null;
         $end = null;
 
-        foreach ((array)$reader->parseInnerTree([]) as $elem) {
-
-            if ($elem['name'] !== $timeRange) continue;
+        foreach ((array) $reader->parseInnerTree([]) as $elem) {
+            if ($elem['name'] !== $timeRange) {
+                continue;
+            }
 
             $start = empty($elem['attributes']['start']) ?: $elem['attributes']['start'];
             $end = empty($elem['attributes']['end']) ?: $elem['attributes']['end'];
-
         }
         if (!$start && !$end) {
             throw new BadRequest('The freebusy report must have a time-range element');
@@ -85,7 +88,5 @@ class FreeBusyQueryReport implements XmlDeserializable {
         $result->end = $end;
 
         return $result;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
index db32cc6a5..710095bb2 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -11,7 +13,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 /**
- * Invite-reply POST request parser
+ * Invite-reply POST request parser.
  *
  * This class parses the invite-reply POST request, as defined in:
  *
@@ -21,8 +23,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class InviteReply implements XmlDeserializable {
-
+class InviteReply implements XmlDeserializable
+{
     /**
      * The sharee calendar user address.
      *
@@ -40,14 +42,14 @@ class InviteReply implements XmlDeserializable {
     public $calendarUri;
 
     /**
-     * The id of the invite message that's being responded to
+     * The id of the invite message that's being responded to.
      *
      * @var string
      */
     public $inReplyTo;
 
     /**
-     * An optional message
+     * An optional message.
      *
      * @var string
      */
@@ -61,22 +63,21 @@ class InviteReply implements XmlDeserializable {
     public $status;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param string $href
      * @param string $calendarUri
      * @param string $inReplyTo
      * @param string $summary
-     * @param int $status
+     * @param int    $status
      */
-    function __construct($href, $calendarUri, $inReplyTo, $summary, $status) {
-
+    public function __construct($href, $calendarUri, $inReplyTo, $summary, $status)
+    {
         $this->href = $href;
         $this->calendarUri = $calendarUri;
         $this->inReplyTo = $inReplyTo;
         $this->summary = $summary;
         $this->status = $status;
-
     }
 
     /**
@@ -98,10 +99,11 @@ class InviteReply implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = KeyValue::xmlDeserialize($reader);
 
         $href = null;
@@ -111,40 +113,35 @@ class InviteReply implements XmlDeserializable {
         $status = null;
 
         foreach ($elems as $name => $value) {
-
             switch ($name) {
-
-                case '{' . Plugin::NS_CALENDARSERVER . '}hosturl' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}hosturl':
                     foreach ($value as $bla) {
-                        if ($bla['name'] === '{DAV:}href') {
+                        if ('{DAV:}href' === $bla['name']) {
                             $calendarUri = $bla['value'];
                         }
                     }
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}invite-accepted' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}invite-accepted':
                     $status = DAV\Sharing\Plugin::INVITE_ACCEPTED;
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}invite-declined' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}invite-declined':
                     $status = DAV\Sharing\Plugin::INVITE_DECLINED;
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}in-reply-to' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}in-reply-to':
                     $inReplyTo = $value;
                     break;
-                case '{' . Plugin::NS_CALENDARSERVER . '}summary' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}summary':
                     $summary = $value;
                     break;
-                case '{DAV:}href' :
+                case '{DAV:}href':
                     $href = $value;
                     break;
             }
-
         }
         if (is_null($calendarUri)) {
             throw new BadRequest('The {http://calendarserver.org/ns/}hosturl/{DAV:}href element must exist');
         }
 
         return new self($href, $calendarUri, $inReplyTo, $summary, $status);
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php
index ce7fafde9..7cad98da5 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/MkCalendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\Xml\Reader;
@@ -16,8 +18,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class MkCalendar implements XmlDeserializable {
-
+class MkCalendar implements XmlDeserializable
+{
     /**
      * The list of properties that will be set.
      *
@@ -30,10 +32,9 @@ class MkCalendar implements XmlDeserializable {
      *
      * @return array
      */
-    function getProperties() {
-
+    public function getProperties()
+    {
         return $this->properties;
-
     }
 
     /**
@@ -55,10 +56,11 @@ class MkCalendar implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $self = new self();
 
         $elementMap = $reader->elementMap;
@@ -67,13 +69,11 @@ class MkCalendar implements XmlDeserializable {
         $elems = $reader->parseInnerTree($elementMap);
 
         foreach ($elems as $elem) {
-            if ($elem['name'] === '{DAV:}set') {
+            if ('{DAV:}set' === $elem['name']) {
                 $self->properties = array_merge($self->properties, $elem['value']['{DAV:}prop']);
             }
         }
 
         return $self;
-
     }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
index e0bd8e0af..60bd579d5 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Sabre\CalDAV\Xml\Request;
 
 use Sabre\CalDAV\Plugin;
@@ -8,7 +10,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 /**
- * Share POST request parser
+ * Share POST request parser.
  *
  * This class parses the share POST request, as defined in:
  *
@@ -18,8 +20,8 @@ use Sabre\Xml\XmlDeserializable;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Share implements XmlDeserializable {
-
+class Share implements XmlDeserializable
+{
     /**
      * The list of new people added or updated or removed from the share.
      *
@@ -28,14 +30,13 @@ class Share implements XmlDeserializable {
     public $sharees = [];
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param Sharee[] $sharees
      */
-    function __construct(array $sharees) {
-
+    public function __construct(array $sharees)
+    {
         $this->sharees = $sharees;
-
     }
 
     /**
@@ -57,55 +58,52 @@ class Share implements XmlDeserializable {
      * the next element.
      *
      * @param Reader $reader
+     *
      * @return mixed
      */
-    static function xmlDeserialize(Reader $reader) {
-
+    public static function xmlDeserialize(Reader $reader)
+    {
         $elems = $reader->parseGetElements([
-            '{' . Plugin::NS_CALENDARSERVER . '}set'    => 'Sabre\\Xml\\Element\\KeyValue',
-            '{' . Plugin::NS_CALENDARSERVER . '}remove' => 'Sabre\\Xml\\Element\\KeyValue',
+            '{'.Plugin::NS_CALENDARSERVER.'}set' => 'Sabre\\Xml\\Element\\KeyValue',
+            '{'.Plugin::NS_CALENDARSERVER.'}remove' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
         $sharees = [];
 
         foreach ($elems as $elem) {
             switch ($elem['name']) {
-
-                case '{' . Plugin::NS_CALENDARSERVER . '}set' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}set':
                     $sharee = $elem['value'];
 
-                    $sumElem = '{' . Plugin::NS_CALENDARSERVER . '}summary';
-                    $commonName = '{' . Plugin::NS_CALENDARSERVER . '}common-name';
+                    $sumElem = '{'.Plugin::NS_CALENDARSERVER.'}summary';
+                    $commonName = '{'.Plugin::NS_CALENDARSERVER.'}common-name';
 
                     $properties = [];
                     if (isset($sharee[$commonName])) {
                         $properties['{DAV:}displayname'] = $sharee[$commonName];
                     }
 
-                    $access = array_key_exists('{' . Plugin::NS_CALENDARSERVER . '}read-write', $sharee)
+                    $access = array_key_exists('{'.Plugin::NS_CALENDARSERVER.'}read-write', $sharee)
                         ? \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE
                         : \Sabre\DAV\Sharing\Plugin::ACCESS_READ;
 
                     $sharees[] = new Sharee([
-                        'href'       => $sharee['{DAV:}href'],
+                        'href' => $sharee['{DAV:}href'],
                         'properties' => $properties,
-                        'access'     => $access,
-                        'comment'    => isset($sharee[$sumElem]) ? $sharee[$sumElem] : null
+                        'access' => $access,
+                        'comment' => isset($sharee[$sumElem]) ? $sharee[$sumElem] : null,
                     ]);
                     break;
 
-                case '{' . Plugin::NS_CALENDARSERVER . '}remove' :
+                case '{'.Plugin::NS_CALENDARSERVER.'}remove':
                     $sharees[] = new Sharee([
-                        'href'   => $elem['value']['{DAV:}href'],
-                        'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS
+                        'href' => $elem['value']['{DAV:}href'],
+                        'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS,
                     ]);
                     break;
-
             }
         }
 
         return new self($sharees);
-
     }
-
 }