* Adjust BatchedRemoveStatusService for ActivityPub
* Add tests for ActivityPub workers
* Add tests for FollowService
* Add tests for FavouriteService, UnfollowService and PostStatusService
* Add tests for ReblogService, BlockService, UnblockService, ProcessMentionsService
* Add tests for AuthorizeFollowService, RejectFollowService, RemoveStatusService
* Add tests for BatchedRemoveStatusService
* Deliver updates to a local account to ActivityPub followers
* Minor adjustments