## [1.6.0](https://www.github.com/googleapis/python-pubsub/compare/v1.5.0...v1.6.0) (2020-06-09)

### Features

* Add flow control for message publishing ([#96](https://www.github.com/googleapis/python-pubsub/issues/96)) ([06085c4](https://www.github.com/googleapis/python-pubsub/commit/06085c4083b9dccdd50383257799904510bbf3a0))


### Bug Fixes

* Fix PubSub incompatibility with api-core 1.17.0+ ([#103](https://www.github.com/googleapis/python-pubsub/issues/103)) ([c02060f](https://www.github.com/googleapis/python-pubsub/commit/c02060fbbe6e2ca4664bee08d2de10665d41dc0b))


### Documentation
- Clarify that Schedulers shouldn't be used with multiple SubscriberClients ([#100](https://github.com/googleapis/python-pubsub/pull/100)) ([cf9e87c](https://github.com/googleapis/python-pubsub/commit/cf9e87c80c0771f3fa6ef784a8d76cb760ad37ef))
- Fix update subscription/snapshot/topic samples ([#113](https://github.com/googleapis/python-pubsub/pull/113)) ([e62c38b](https://github.com/googleapis/python-pubsub/commit/e62c38bb33de2434e32f866979de769382dea34a))


### Internal / Testing Changes
- Re-generated service implementaton using synth: removed experimental notes from the RetryPolicy and filtering features in anticipation of GA, added DetachSubscription (experimental) ([#114](https://github.com/googleapis/python-pubsub/pull/114)) ([0132a46](https://github.com/googleapis/python-pubsub/commit/0132a4680e0727ce45d5e27d98ffc9f3541a0962))
- Incorporate will_accept() checks into publish() ([#108](https://github.com/googleapis/python-pubsub/pull/108)) ([6c7677e](https://github.com/googleapis/python-pubsub/commit/6c7677ecb259672bbb9b6f7646919e602c698570))