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

Conflicts:
- `package.json`:
  Not really a conflict, just some glitch-soc-specific dependency
  too close to an upstream-updated one.

app/views/layouts/application.html.haml

@@ -27,6 +27,7 @@
       - elsif @theme[:supported_locales].include? 'en'
         = javascript_pack_tag "locales/#{@theme[:flavour]}/en", integrity: true, crossorigin: 'anonymous'
     = csrf_meta_tags
+    %meta{ name: 'style-nonce', content: request.content_security_policy_nonce }
 
     = stylesheet_link_tag '/inert.css', skip_pipeline: true, media: 'all', id: 'inert-style'