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

Conflicts:
- `app/services/remove_status_service.rb`:
  Conflict caused by us having a distinc Direct timeline.
  Ported upstream changes.
- `app/javascript/mastodon/features/compose/components/compose_form.js`:
  Conflict between glitch-soc's variable character limit and upstream
  refactoring that part of the code.
  Ported upstream changes.

package.json

@@ -85,6 +85,7 @@
     "babel-runtime": "^6.26.0",
     "blurhash": "^1.1.3",
     "classnames": "^2.2.5",
+    "color-blend": "^3.0.0",
     "compression-webpack-plugin": "^6.1.1",
     "cross-env": "^7.0.2",
     "css-loader": "^5.0.1",