chore: release 2.2.0 (googleapis#75)

🤖 I have created a release \*beep\* \*boop\* 
---
## [2.2.0](https://www.github.com/googleapis/python-texttospeech/compare/v2.1.0...v2.2.0) (2020-08-10)


### Features

* incorporate upstream changes ([googleapis#73](https://www.github.com/googleapis/python-texttospeech/issues/73)) ([8ee5447](https://www.github.com/googleapis/python-texttospeech/commit/8ee544740f18497d9925bcf77e5ab96695503589))

---


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

chore: release 2.1.0 (googleapis#54)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

chore: release 2.0.0 (googleapis#35)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py

* Update CHANGELOG.md

* Update CHANGELOG.md

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>

chore: release 1.0.1 (googleapis#14)

chore: release 1.0.0 (googleapis#10)

Release 0.5.0 (#8771)

Release 0.4.0 (#7302)

Release texttospeech 0.3.0 (#6997)

* Release 0.3.0

Release texttospeech 0.2.0 (#5475)

Release 0.1.0 (#5062)