Merge pull request #32 from LeetCode-OpenSource/greenkeeper/lint-staged-9.1.0

Greenkeeper/lint staged 9.1.0

Author: Brooooooklyn

package.json

@@ -77,7 +77,7 @@
     "husky": "^3.0.0",
     "immer": "^3.1.2",
     "jest": "^24.5.0",
-    "lint-staged": "^8.1.5",
+    "lint-staged": "^9.1.0",
     "lodash": "^4.17.11",
     "madge": "^3.4.4",
     "npm-run-all": "^4.1.5",