Update dependency google-cloud-pubsub to v0.45.0#29

renovate-bot wants to merge 1 commit intoGoogleCloudPlatform:masterGoogleCloudPlatform/gke-tracing-demo:masterfrom

renovate-bot:renovate/google-cloud-pubsub-0.xrenovate-bot/gke-tracing-demo:renovate/google-cloud-pubsub-0.xCopy head branch name to clipboard