Update dependency lint-staged to v8.1.7 (#180)

Author: renovate-bot

package.json

@@ -43,7 +43,7 @@
     "ava": "1.4.1",
     "builtins": "2.0.0",
     "husky": "2.2.0",
-    "lint-staged": "8.1.5",
+    "lint-staged": "8.1.7",
     "np": "5.0.1",
     "prettier": "1.17.0",
     "rimraf": "2.6.3",