chore(deps): update dependency @google-cloud/pubsub to ^0.23.0 (#367)

Author: renovate[bot]

package.json

@@ -73,7 +73,7 @@
   "devDependencies": {
     "@google-cloud/bigquery": "^2.0.1",
     "@google-cloud/nodejs-repo-tools": "^3.0.0",
-    "@google-cloud/pubsub": "^0.22.0",
+    "@google-cloud/pubsub": "^0.23.0",
     "@google-cloud/storage": "^2.2.0",
     "@types/arrify": "^1.0.4",
     "@types/express": "^4.16.0",