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

Conflicts:
- Gemfile
- app/controllers/api/v1/search_controller.rb
  Conflict because we changed the number of default results to be
  configurable
- app/lib/settings/scoped_settings.rb
  Addition of a new “noindex” site-wide setting,
  conflict due to our change of the two other site-wide settings
  (default flavour and skin instead of theme)
- spec/controllers/application_controller_spec.rb
  Addition of a new “noindex” site-wide setting,
  conflict due to our change of the two other site-wide settings
  (default flavour and skin instead of theme)

package.json

@@ -69,7 +69,7 @@
     "@babel/plugin-transform-react-jsx-self": "^7.2.0",
     "@babel/plugin-transform-react-jsx-source": "^7.5.0",
     "@babel/plugin-transform-runtime": "^7.5.5",
-    "@babel/preset-env": "^7.5.5",
+    "@babel/preset-env": "^7.6.0",
     "@babel/preset-react": "^7.0.0",
     "@babel/runtime": "^7.5.4",
     "@clusterws/cws": "^0.15.0",
@@ -159,7 +159,7 @@
     "stringz": "^2.0.0",
     "substring-trie": "^1.0.2",
     "terser-webpack-plugin": "^1.4.1",
-    "tesseract.js": "^2.0.0-alpha.13",
+    "tesseract.js": "^2.0.0-alpha.15",
     "throng": "^4.0.0",
     "tiny-queue": "^0.2.1",
     "uuid": "^3.1.0",
@@ -181,7 +181,7 @@
     "eslint-plugin-jsx-a11y": "~6.2.3",
     "eslint-plugin-promise": "~4.2.1",
     "eslint-plugin-react": "~7.14.3",
-    "jest": "^24.8.0",
+    "jest": "^24.9.0",
     "raf": "^3.4.1",
     "react-intl-translations-manager": "^5.0.3",
     "react-test-renderer": "^16.8.6",