chore(package): update lint-staged to version 9.1.0

Closes #65

Author: greenkeeper[bot]

Diff for: package.json

@@ -78,7 +78,7 @@
     "eslint-plugin-node": "^8.0.1",
     "eslint-plugin-prettier": "2.6.0",
     "husky": "^1.3.1",
-    "lint-staged": "^8.1.5",
+    "lint-staged": "^9.1.0",
     "loader.js": "^4.7.0",
     "prettier": "^1.16.4",
     "sinon": "^7.3.0",