chore(deps): update dependency eslint-config-prettier to v4 (#586)

Author: renovate[bot]

package.json

@@ -92,7 +92,7 @@
     "@types/xdg-basedir": "^2.0.0",
     "codecov": "^3.0.0",
     "eslint": "^5.0.0",
-    "eslint-config-prettier": "^3.0.0",
+    "eslint-config-prettier": "^4.0.0",
     "eslint-plugin-node": "^8.0.0",
     "eslint-plugin-prettier": "^3.0.0",
     "gts": "^0.9.0",