chore(deps): update dependency @google-cloud/nodejs-repo-tools to v3 (#84)

Author: renovate[bot]

packages/google-cloud-redis/package.json

@@ -46,7 +46,7 @@
     "protobufjs": "^6.8.8"
   },
   "devDependencies": {
-    "@google-cloud/nodejs-repo-tools": "^2.3.3",
+    "@google-cloud/nodejs-repo-tools": "^3.0.0",
     "codecov": "^3.1.0",
     "eslint": "^5.5.0",
     "eslint-config-prettier": "^3.0.1",