v0.29.0

• bigtable:
  • Add retry to all idempotent RPCs.
  • cbt supports complex GC policies.
  • Emulator supports arbitrary bytes in regex filters.
• firestore: Add ArrayUnion and ArrayRemove.
• logging: Add the ContextFunc option to supply the context used for
  asynchronous RPCs.
• profiler: Ignore NotDefinedError when fetching the instance name
• pubsub:
  • BEHAVIOR CHANGE: Receive doesn't retry if an RPC returns codes.Cancelled.
  • BEHAVIOR CHANGE: Receive retries on Unavailable intead of returning.
  • Fix deadlock.
  • Restore Ack/Nack/Modacks metrics.
  • Improve context handling in iterator.
  • Implement synchronous mode for Receive.
  • pstest: add Pull.
• spanner: Add a metric for the number of sessions currently opened.
• storage:
  • Canceling the context releases all resources.
  • Add additional RetentionPolicy attributes.
• vision/apiv1: Add LocalizeObjects method.