Update lint-staged to the latest version 🚀 (#89)

Author: greenkeeper[bot]

package.json

@@ -57,7 +57,7 @@
     "in-publish": "^2.0.0",
     "jest": "^21.1.0",
     "licensor": "^4.0.0",
-    "lint-staged": "^4.1.3",
+    "lint-staged": "^5.0.0",
     "prettier": "^1.7.0",
     "webpack": "^3.5.6"
   },