chore(deps): update dependency eslint-config-prettier to v3 (#143)

Author: renovate[bot]

packages/google-cloud-node/package.json

@@ -90,7 +90,7 @@
     "async": "^2.6.1",
     "codecov": "^3.0.2",
     "eslint": "^5.0.0",
-    "eslint-config-prettier": "^2.9.0",
+    "eslint-config-prettier": "^3.0.0",
     "eslint-plugin-node": "^7.0.0",
     "eslint-plugin-prettier": "^2.6.0",
     "ink-docstrap": "^1.3.2",