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

Author: greenkeeper[bot]

package.json

@@ -84,7 +84,7 @@
     "husky": "^0.14.3",
     "istanbul": "1.1.0-alpha.1",
     "mocha": "^5.0.2",
-    "lint-staged": "^7.0.0",
+    "lint-staged": "^8.0.0",
     "morgan": "^1.8.1",
     "nodemon": "^1.11.0",
     "nps": "^5.7.1",