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

Conflicts:
- app/controllers/settings/notifications_controller.rb
- app/javascript/packs/public.js
- app/views/settings/preferences/show.html.haml
- app/views/stream_entries/_simple_status.html.haml
- config/locales/simple_form.en.yml
- config/locales/simple_form.pl.yml
- config/navigation.rb
- config/routes.rb

lib/mastodon/version.rb

@@ -9,11 +9,11 @@ module Mastodon
     end
 
     def minor
-      8
+      9
     end
 
     def patch
-      4
+      0
     end
 
     def pre
@@ -21,7 +21,7 @@ module Mastodon
     end
 
     def flags
-      ''
+      'rc1'
     end
 
     def to_a