Issue #2910706 by joelpittet, droplet, alexpott, Yogesh Pawar: Update Stylelint related Packages

core/.stylelintrc.json

@@ -7,6 +7,8 @@
     "comment-empty-line-before": null,
     "function-linear-gradient-no-nonstandard-direction": null,
     "function-whitespace-after": null,
+    "no-descending-specificity": null,
+    "no-duplicate-selectors": null,
     "no-unknown-animations": true,
     "number-leading-zero": "always",
     "plugin/no-browser-hacks": [true, {

core/package.json

@@ -28,9 +28,9 @@
     "eslint-plugin-react": "^6.10.3",
     "glob": "^7.1.1",
     "minimist": "^1.2.0",
-    "stylelint": "^7.13.0",
+    "stylelint": "^9.1.1",
     "stylelint-checkstyle-formatter": "^0.1.1",
-    "stylelint-config-standard": "^16.0.0",
+    "stylelint-config-standard": "^18.2.0",
     "stylelint-no-browser-hacks": "^1.1.0"
   },
   "babel": {

core/profiles/demo_umami/themes/umami/css/components/blocks/banner/banner.css

@@ -79,7 +79,7 @@
      * as the .visually-hidden class has.
      */
     position: absolute !important;
-    clip: rect(1px,1px,1px,1px);
+    clip: rect(1px, 1px, 1px, 1px);
     overflow: hidden;
     height: 1px;
     width: 1px;