chore: release 2.8.0 (#297)

🤖 I have created a release \*beep\* \*boop\*
---
## [2.8.0](https://www.github.com/googleapis/python-bigquery-storage/compare/v2.7.0...v2.8.0) (2021-09-10)


### Features

* add `BigQueryWriteClient` where `append_rows` returns a helper for writing rows ([#284](https://www.github.com/googleapis/python-bigquery-storage/issues/284)) ([2461f63](https://www.github.com/googleapis/python-bigquery-storage/commit/2461f63d37f707c2d634a95d87b8ffc3e4af3686))
---


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

@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-cloud-bigquery-storage/#history
 
+## [2.8.0](https://www.github.com/googleapis/python-bigquery-storage/compare/v2.7.0...v2.8.0) (2021-09-10)
+
+
+### Features
+
+* add `AppendRowsStream` helper to append rows with a `BigQueryWriteClient` ([#284](https://www.github.com/googleapis/python-bigquery-storage/issues/284)) ([2461f63](https://www.github.com/googleapis/python-bigquery-storage/commit/2461f63d37f707c2d634a95d87b8ffc3e4af3686))
+
 ## [2.7.0](https://www.github.com/googleapis/python-bigquery-storage/compare/v2.6.3...v2.7.0) (2021-09-02)
 
 

setup.py

@@ -21,7 +21,7 @@
 
 name = "google-cloud-bigquery-storage"
 description = "BigQuery Storage API API client library"
-version = "2.7.0"
+version = "2.8.0"
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     # NOTE: Maintainers, please do not require google-api-core>=2.x.x