chore(package): update lint-staged to version 4.0.0 (#27)

Author: greenkeeper[bot]

package.json

@@ -11,7 +11,7 @@
     "eslint": "^3.18.0",
     "husky": "^0.13.2",
     "jest": "^19.0.2",
-    "lint-staged": "^3.4.0",
+    "lint-staged": "^4.0.0",
     "prettier": "^1.0.0",
     "semantic-release": "^6.3.2"
   },