v0.29.4

Notable Implementation Changes

• Bug fix: Restore previous behavior of the subscription lease
  maintenance worker. This was accidentally "stopped" in 0.29.3
  due to a change in implementation that went from an active
  boolean to an "inactive" / stopped boolean, so True became
  False and vice-versa (#4564).

PyPI: https://pypi.org/project/google-cloud-pubsub/0.29.4/