chore: release 1.12.8 (#1094)

:robot: I have created a release \*beep\* \*boop\* 
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### [1.12.8](https://www.github.com/googleapis/google-api-python-client/compare/v1.12.7...v1.12.8) (2020-11-18)


### Documentation

* add httplib2 authorization to thread_safety ([#1005](https://www.github.com/googleapis/google-api-python-client/issues/1005)) ([205ae59](https://www.github.com/googleapis/google-api-python-client/commit/205ae5988bd89676823088d6c8a7bd17e3beefcf)), closes [#808](https://www.github.com/googleapis/google-api-python-client/issues/808) [#808](https://www.github.com/googleapis/google-api-python-client/issues/808)
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).
diff --git a/setup.py b/setup.py
index f0ff03f..bf0a8f4 100644
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@
 with io.open(readme_filename, encoding="utf-8") as readme_file:
     readme = readme_file.read()
 
-version = "1.12.7"
+version = "1.12.8"
 
 setup(
     name="google-api-python-client",