Update dependency lint-staged to v8.1.6

Author: renovate-bot

package-lock.json

@@ -52,7 +52,7 @@
     "enzyme-to-json": "3.3.5",
     "husky": "1.3.1",
     "jest": "23.6.0",
-    "lint-staged": "8.1.5",
+    "lint-staged": "8.1.6",
     "prettier": "1.17.0",
     "react": "16.8.6",
     "react-dom": "16.8.6",