chore(package): update stylelint to version 13.5.0

Closes #134

Author: greenkeeper[bot]

package.json

@@ -108,7 +108,7 @@
     "sinon": "^6.0.0",
     "spectron": "^4.0.0",
     "style-loader": "^0.23.0",
-    "stylelint": "^9.1.1",
+    "stylelint": "^13.5.0",
     "stylelint-config-standard": "^18.0.0",
     "ts-jest": "^22.4.0",
     "ts-node": "^6.0.0",