chore(package): update lint-staged to version 8.1.7

Closes #23

Author: greenkeeper[bot]

package.json

@@ -53,7 +53,7 @@
     "eslint-plugin-standard": "^3.0.1",
     "husky": "^0.14.3",
     "jest": "^22.0.0",
-    "lint-staged": "^7.0.0",
+    "lint-staged": "^8.1.7",
     "prettier": "^1.7.4",
     "semantic-release-cli": "^4.0.0",
     "semantic-release": "^15.0.0"