chore: release 1.12.4 (#1060)

:robot: I have created a release \*beep\* \*boop\* 
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### [1.12.4](https://www.github.com/googleapis/google-api-python-client/compare/v1.12.3...v1.12.4) (2020-10-20)


### Bug Fixes

* don't set content-range on empty uploads ([#1070](https://www.github.com/googleapis/google-api-python-client/issues/1070)) ([af6035f](https://www.github.com/googleapis/google-api-python-client/commit/af6035f6754a155ee6b04bbbc5c39410c7316d6a))


### Documentation

* fix typo in oauth.md ([#1058](https://www.github.com/googleapis/google-api-python-client/issues/1058)) ([30eff9d](https://www.github.com/googleapis/google-api-python-client/commit/30eff9d8276919b8c4e50df2d3b1982594423692))
* update generated docs ([#1053](https://www.github.com/googleapis/google-api-python-client/issues/1053)) ([3e17f89](https://www.github.com/googleapis/google-api-python-client/commit/3e17f8990db54bec16c48c319072799a14f5a53f)), closes [#1049](https://www.github.com/googleapis/google-api-python-client/issues/1049)
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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 642313c..33f7e5a 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 = "1.12.3"
+version = "1.12.4"
 
 setup(
     name="google-api-python-client",