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

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "eslint-config-finn-prettier": "^3.0.0",
     "husky": "^0.14.3",
     "jest": "^21.2.1",
-    "lint-staged": "^5.0.0",
+    "lint-staged": "^6.0.0",
     "prettier": "^1.8.2",
     "semantic-release": "^8.2.0"
   },