Bug fixes

In this release:
- #2995281: Stubs langcode
- #2999034: Update Dependencies Format in .info.yml
- Some minor fixes

In this release:
- Added compatibility with Drupal 8.6.x
- Bug fixes

With this release we introduce a content moderation integration. When Thunder is freshly installed, you will no longer have
a simple publish checkbox, but three moderation states to save into. This makes it possible to save a draft of an published
article without overwriting the published version.

Additionally it is possible to restrict the permission to publish an article to certain users. We introduced a new "restricted Editor" role
that is only able to create drafts, but not publish those drafts.

Fixed important typo in schema for id > id_attr

Fix taxonomy_terms problem on update