chore(package): update stylelint to version 11.1.1

Closes #280

Author: greenkeeper[bot]

package.json

@@ -53,7 +53,7 @@
     "lint-staged": "^4.0.1",
     "lodash": "^4.15.0",
     "prettier": "^1.4.4",
-    "stylelint": "^10.0.0",
+    "stylelint": "^11.1.1",
     "typescript": "~2.6.1"
   },
   "peerDependency": {