[Snyk] Security upgrade @google-cloud/pubsub from 0.22.2 to 0.29.0#340

snyk-bot wants to merge 1 commit intomasterleejh3224/nodejs-docs-samples:masterfrom

snyk-fix-43177f8e70d293950365893637a54e1eleejh3224/nodejs-docs-samples:snyk-fix-43177f8e70d293950365893637a54e1eCopy head branch name to clipboard