chore(package): update stylelint to version 11.1.0

Closes #139

Author: greenkeeper[bot]

package.json

@@ -89,7 +89,7 @@
     "rimraf": "2.6.3",
     "sass-loader": "^7.1.0",
     "style-loader": "^0.23.1",
-    "stylelint": "9.10.1",
+    "stylelint": "11.1.0",
     "stylelint-config-standard": "^18.2.0",
     "url-loader": "1.1.2",
     "webpack": "4.29.0",