chore(package): update lint-staged to version 9.4.0

Closes #6

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "@types/node-fetch": "^2.3.7",
     "browser-sync": "^2.26.7",
     "husky": "^2.4.1",
-    "lint-staged": "^8.2.1",
+    "lint-staged": "^9.4.0",
     "prettier": "^1.18.0",
     "ts-loader": "^6.0.4",
     "tslint": "^5.18.0",