chore(deps): update dependency stylelint to v12 (#1626)

Author: renovate[bot]

package.json

@@ -153,7 +153,7 @@
         "selenium-server": "^3.0.1",
         "semver": "^5.3.0",
         "style-loader": "^0.23.0",
-        "stylelint": "^9.10.1",
+        "stylelint": "^12.0.0",
         "stylelint-config-prettier": "^4.0.0",
         "stylelint-config-standard": "^19.0.0",
         "through2": "^2.0.3",