Bug fixes

Changes from beta5:
- update GutenbergJS to version 4.0.0-rc.0
- add support for loading block components using *.gutenberg.yml files
- add an example block submodule
- switch Gutenberg Cloud to use jsDelivr as its CDN provider
- various bugfixes

Fix missing medias on retweet content.

Dev release for autotests

New features & changes

* deGov introduces smoke tests for base functionality, which can be run via Behat
* First and early draft of the deGov theme
* Newsletter settings now feature a field for custom data protection info
* deGov demo content: contains demo content for all media types and the content types blog, press and event
* Media type document: file field is now mandatory

This is an update that works with Social Auth Beta 5

This is an update that works with Social Auth Beta 5