New features

Main changes from RC-1:
- Now it's using Gutenberg core files directly. Removed Gutenberg-JS dependency. Based on Gutenberg version 5.6.1.
- Better media files handling - support to store title, caption and alternative text.
- New Allowed Blocks UI at content type admin UI.
- And, of course, several bug fixes.

# New changes are made in the admin settings.
# Added a textarea for adding form ids to append the pikaday library respectively
# Added schema for configurations

Validate custom form - Commerce

Initial release.

Important

#3047429: Endnote import not working
EndNote XML-based formats were wrongly named before. The one which was called Endnote 7 XML now is called EndNote X3 XML. Another one which was called Endnote X3 XML now is called EndNote 7 XML. No changes have been done to machine-names.

Bug fixes and new features that aren't fully back-compatible with 8.x-1.x