chore(package): update lint-staged to version 8.1.0

Closes #17

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
     "fs-extra": "^5.0.0",
     "husky": "^0.14.3",
     "jest": "^22.1.1",
-    "lint-staged": "^7.0.0",
+    "lint-staged": "^8.1.0",
     "remove-lockfiles": "^2.1.1",
     "xo": "^0.20.3"
   },