Log Message:
php-nextcloud: Update to 20.0.0

Changelog:
20.0.0

The three biggest features we introduce with Nextcloud 20 are:

     Our new dashboard provides a great starting point for the day with over a \ 
dozen widgets ranging from Twitter and Github to Moodle and Zammad already \ 
available
     Search was unified, bringing search results of Nextcloud apps as well as \ 
external services like Gitlab, Jira and Discourse in one place
     Talk introduced bridging to other platforms including MS Teams, Slack, IRC, \ 
Matrix and a dozen others

 Some other improvements we want to highlight include:

     Notifications and Activities were brought together, making sure you won't \ 
miss anything important
     We added a 'status' setting so you can communicate to other users what you \ 
are up to
     Talk also brings dashboard and search integration, emoji picker, upload \ 
view, camera and microphone settings, mute and more
     Calendar integrates in dashboard and search, introduced a list view and \ 
design improvements
     Mail introduces threaded view, mailbox management and more
     Deck integrates with dashboard and search, introduces Calendar integration, \ 
modal view for card editing and series of smaller improvements
     Flow adds push notification and webhooks so other web apps can easily \ 
integrate with Nextcloud
     Text introduced direct linking to files in Nextcloud
     Files lets you add a description to public link shares