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

Conflicts:
- `Gemfile.lock`:
  No real conflict, glitch-soc-only dependency (redcarpet) too close to an
  upstream one (rdf-normalize)
- `README.md`:
  we have different READMEs, discarded upstream's changes
- `app/views/admin/custom_emojis/index.html.haml`:
  No real conflict, different context because of glitch-soc theming
- `lib/mastodon/statuses_cli.rb`:
  Upstream added code to keep bookmarked statuses, we were already doing so
  with slightly different code. Discarded upstream's changes.
- `package.json`:
  No real conflict, glitch-soc-only dependency (favico.js) too close to
  an upstream one

app/views/admin/custom_emojis/index.html.haml

@@ -1,6 +1,9 @@
 - content_for :page_title do
   = t('admin.custom_emojis.title')
 
+- content_for :heading_actions do
+  = link_to t('admin.custom_emojis.upload'), new_admin_custom_emoji_path, class: 'button'
+
 .filters
   .filter-subset
     %strong= t('admin.accounts.location.title')
@@ -78,6 +81,3 @@
 
 = paginate @custom_emojis
 
-%hr.spacer/
-
-= link_to t('admin.custom_emojis.upload'), new_admin_custom_emoji_path, class: 'button'