chore: release 2.5.0 (#412)

🤖 I have created a release \*beep\* \*boop\*
---
## [2.5.0](https://www.github.com/googleapis/python-pubsub/compare/v2.4.2...v2.5.0) (2021-05-18)


### Features

* make publish futures compatible with concurrent.futures.as_completed() ([#397](https://www.github.com/googleapis/python-pubsub/issues/397)) ([e29a2c0](https://www.github.com/googleapis/python-pubsub/commit/e29a2c0ac6c5d2ebf2311646e552a02f184cfedc))


### Bug Fixes

* scheduler errors when executor in shutdown ([#399](https://www.github.com/googleapis/python-pubsub/issues/399)) ([39a83d3](https://www.github.com/googleapis/python-pubsub/commit/39a83d3eef196e88478ad8362201a2ab12e9f681))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

CHANGELOG.md

@@ -5,6 +5,18 @@
 [1]: https://pypi.org/project/google-cloud-pubsub/#history
 
 
+## [2.5.0](https://www.github.com/googleapis/python-pubsub/compare/v2.4.2...v2.5.0) (2021-05-18)
+
+
+### Features
+
+* Make publish futures compatible with `concurrent.futures.as_completed()`. ([#397](https://www.github.com/googleapis/python-pubsub/issues/397)) ([e29a2c0](https://www.github.com/googleapis/python-pubsub/commit/e29a2c0ac6c5d2ebf2311646e552a02f184cfedc))
+
+
+### Bug Fixes
+
+* Scheduler errors when executor in shutdown. ([#399](https://www.github.com/googleapis/python-pubsub/issues/399)) ([39a83d3](https://www.github.com/googleapis/python-pubsub/commit/39a83d3eef196e88478ad8362201a2ab12e9f681))
+
 ## 2.4.2
 
 05-06-2021 23:50 PDT

setup.py

@@ -22,7 +22,7 @@
 
 name = "google-cloud-pubsub"
 description = "Google Cloud Pub/Sub API client library"
-version = "2.4.2"
+version = "2.5.0"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'