chore(package): update lint-staged to version 8.0.0

Author: greenkeeper[bot]

package.json

@@ -56,7 +56,7 @@
     "cosmiconfig": "^5",
     "husky": "^1",
     "jest": "^23",
-    "lint-staged": "^7",
+    "lint-staged": "^8.0.0",
     "prettier": "^1",
     "rimraf": "^2",
     "semantic-release": "^15",