Updated for compat with patch 96 #2350939-96: Implement a generic revision UI.
removes dev test conf.
Mostly general improvements/minor bug fixes.
New in 8.x-1.0-beta4: Fix for a warning message. #3151846: Fix for Notice: Undefined index: #access in language_form_alter() in core/modules/language/language.module
Drupal 9 compatibility.
This release contains improved Drupal 9 support as well as some minor new features and bug fixes.