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

Conflicts:
- `README.md`:
  Our README.md files are completely different. Discarded upstream changes.
- `app/javascript/core/admin.js`:
  Updating rails-ujs, no real conflict, but a comment to close to changed
  code. Various glitch-soc-only files have been updated to match those changes,
  though.
- `package.json`:
  No real conflict, just an additional dependency in glitch-soc that was too
  close to something updated upstream. Took upstream's changes.

app/controllers/following_accounts_controller.rb

@@ -29,7 +29,8 @@ class FollowingAccountsController < ApplicationController
         render json: collection_presenter,
                serializer: ActivityPub::CollectionSerializer,
                adapter: ActivityPub::Adapter,
-               content_type: 'application/activity+json'
+               content_type: 'application/activity+json',
+               fields: restrict_fields_to
       end
     end
   end
@@ -72,4 +73,12 @@ class FollowingAccountsController < ApplicationController
       )
     end
   end
+
+  def restrict_fields_to
+    if page_requested? || !@account.user_hides_network?
+      # Return all fields
+    else
+      %i(id type totalItems)
+    end
+  end
 end