Stylelint: reorganize, remove stylelint-config-recommended-scss

.stylelintrc.json

@@ -1,15 +1,15 @@
 {
-  "extends": [
-    "stylelint-config-standard",
-    "stylelint-config-recommended-scss"
-  ],
+  "extends": ["stylelint-config-standard"],
   "ignoreFiles": ["app/styles/reset.scss"],
+  "plugins": ["stylelint-scss"],
   "rules": {
+    "at-rule-no-unknown": null,
     "at-rule-empty-line-before": ["always", { "ignore": ["after-comment", "first-nested", "inside-block", "blockless-after-same-name-blockless", "blockless-after-blockless"] }],
     "declaration-colon-newline-after": null,
     "declaration-empty-line-before": "never",
     "font-family-no-missing-generic-family-keyword": [true, { "ignoreFontFamilies": ["ForkAwesome", "OpenDyslexic", "soapbox"] }],
     "no-descending-specificity": null,
-    "no-duplicate-selectors": null
+    "no-duplicate-selectors": null,
+    "scss/at-rule-no-unknown": true
   }
 }

package.json

@@ -151,7 +151,6 @@
     "react-test-renderer": "^16.13.1",
     "redux-mock-store": "^1.5.4",
     "stylelint": "^13.7.2",
-    "stylelint-config-recommended-scss": "^4.2.0",
     "stylelint-config-standard": "^20.0.0",
     "stylelint-scss": "^3.18.0",
     "webpack-dev-server": "^3.5.1",

yarn.lock

@@ -11350,13 +11350,6 @@ stylehacks@^4.0.0:
     postcss "^7.0.0"
     postcss-selector-parser "^3.0.0"
 
-stylelint-config-recommended-scss@^4.2.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/stylelint-config-recommended-scss/-/stylelint-config-recommended-scss-4.2.0.tgz#3ad3fc858215cfd16a0f90aecf1ac0ea8a3e6971"
-  integrity sha512-4bI5BYbabo/GCQ6LbRZx/ZlVkK65a1jivNNsD+ix/Lw0U3iAch+jQcvliGnnAX8SUPaZ0UqzNVNNAF3urswa7g==
-  dependencies:
-    stylelint-config-recommended "^3.0.0"
-
 stylelint-config-recommended@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/stylelint-config-recommended/-/stylelint-config-recommended-3.0.0.tgz#e0e547434016c5539fe2650afd58049a2fd1d657"