Bugfix

• You can now invite users to edit a post in Gutenberg, even if they don't have the permission to edit the posts post type
• Moderators & invited post editors will no longer be switched to the post author on save
• Fixed php type error in is_this_posts_moderator method when saving the customiser

Improvement

Post approved & post rejected email can now be sent to invited editors, toggled via settings or a filter