Update dependency stylelint to v14

Author: renovate-bot

package-lock.json

@@ -79,7 +79,7 @@
         "nyc": "^15.1.0",
         "prettier": "~2.4.1",
         "raw-loader": "^4.0.2",
-        "stylelint": "^13.13.1",
+        "stylelint": "^14.0.0",
         "stylelint-config-standard": "^22.0.0",
         "stylelint-plugin-stylus": "^0.11.0",
         "ts-node": "^10.2.1",