fix(deps): update dependency @google-cloud/pubsub to ^0.23.0 (#219)

Author: renovate[bot]

packages/google-privacy-dlp/samples/package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "@google-cloud/dlp": "^0.10.0",
-    "@google-cloud/pubsub": "^0.22.0",
+    "@google-cloud/pubsub": "^0.23.0",
     "mime": "^2.3.1",
     "yargs": "^12.0.1"
   },