Merge pull request #1792 from nextcloud/bump_sabre

3rdparty

apps/dav/lib/CalDAV/CalDavBackend.php

apps/dav/lib/CalDAV/Calendar.php

apps/dav/lib/CalDAV/CalendarObject.php

apps/dav/lib/CalDAV/Plugin.php

apps/dav/lib/CalDAV/Schedule/Plugin.php

apps/dav/lib/CardDAV/AddressBookImpl.php

apps/dav/lib/CardDAV/CardDavBackend.php

apps/dav/lib/CardDAV/Converter.php

apps/dav/lib/Connector/Sabre/DavAclPlugin.php

apps/dav/lib/Files/RootCollection.php

apps/dav/lib/Server.php

apps/dav/tests/unit/CalDAV/CalDavBackendTest.php

apps/dav/tests/unit/CalDAV/CalendarTest.php

apps/dav/tests/unit/CalDAV/PluginTest.php

apps/dav/tests/unit/CalDAV/Schedule/PluginTest.php

apps/dav/tests/unit/CardDAV/AddressBookImplTest.php

apps/dav/tests/unit/CardDAV/BirthdayServiceTest.php

apps/dav/tests/unit/CardDAV/CardDavBackendTest.php

apps/dav/tests/unit/CardDAV/ConverterTest.php