chore(package): update lint-staged to version 4.0.3

Closes #39

Author: greenkeeper[bot]

package.json

@@ -13,7 +13,7 @@
     "cz-conventional-changelog": "^2.0.0",
     "gulp": "^3.8.11",
     "husky": "^0.13.3",
-    "lint-staged": "^3.4.0",
+    "lint-staged": "^4.0.3",
     "prettier": "^1.0.0",
     "standard-version": "^4.0.0",
     "tap": "10.3.4"