chore(package): update stylelint to version 9.2.1

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "node-sass": "4.9.0",
     "postcss-loader": "2.1.5",
     "sass-loader": "7.0.1",
-    "stylelint": "9.2.0",
+    "stylelint": "9.2.1",
     "stylelint-order": "0.8.1",
     "stylelint-scss": "3.1.0",
     "stylelint-webpack-plugin": "0.10.4",