Bug fixes

Fixes

#3093483: Make Ludwig D9 ready
#3153424: [D9] Error: Call to a member function getParameter() on null

New features

Fixing a PHP error, see https://www.drupal.org/project/google_analytics_referrer/issues/3180039

Minor Change for Drupal 9 Compatibility

Compat fixes for hook_event_dispatcher >=8.x-2.00, which is now a requirement.
Compat fixes for Drupal 9.

Support for Drupal 9 is here!

Introduces the Drush command!

Changes since 8.x-1.9:

Changes since 8.x-1.11:

• Microsub: ActivityPub integration
• Microsub: example code for incoming ActivityPub activities
• Webmention: make sure only one comment is created in the right level
• Microsub: start storing etag and modified
• WebSub: use queue to handle incoming content
• Full Drupal 9 compatibility
• Webmention: do not add duplicate webmentions to queue