Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `README.md`:
  Discarded upstream changes: we have our own README
- `app/controllers/follower_accounts_controller.rb`:
  Port upstream's minor refactoring

app/serializers/rest/relationship_serializer.rb

@@ -2,8 +2,8 @@
 
 class REST::RelationshipSerializer < ActiveModel::Serializer
   attributes :id, :following, :showing_reblogs, :notifying, :languages, :followed_by,
-             :blocking, :blocked_by, :muting, :muting_notifications, :requested,
-             :domain_blocking, :endorsed, :note
+             :blocking, :blocked_by, :muting, :muting_notifications,
+             :requested, :requested_by, :domain_blocking, :endorsed, :note
 
   def id
     object.id.to_s
@@ -54,6 +54,10 @@ class REST::RelationshipSerializer < ActiveModel::Serializer
     instance_options[:relationships].requested[object.id] ? true : false
   end
 
+  def requested_by
+    instance_options[:relationships].requested_by[object.id] ? true : false
+  end
+
   def domain_blocking
     instance_options[:relationships].domain_blocking[object.id] || false
   end