fix(package): update lint-staged to version 6.0.0

Author: greenkeeper[bot]

package.json

@@ -40,7 +40,7 @@
     "http-status-codes": "^1.3.0",
     "husky": "^0.14.0",
     "inflection": "^1.7.2",
-    "lint-staged": "^5.0.0",
+    "lint-staged": "^6.0.0",
     "lodash": "^4.17.1",
     "prettier-standard-formatter": "^0.222222222222222.333333333333333",
     "snazzy": "^7.0.0",