chore: release 1.32.1 (#790)

:robot: I have created a release \*beep\* \*boop\*
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### [1.32.1](https://www.github.com/googleapis/google-auth-library-python/compare/v1.32.0...v1.32.1) (2021-06-30)


### Bug Fixes

* avoid leaking sub-session created for '_auth_request' ([#789](https://www.github.com/googleapis/google-auth-library-python/issues/789)) ([2079ab5](https://www.github.com/googleapis/google-auth-library-python/commit/2079ab5e1db464f502248ae4f9e424deeef87fb2))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
diff --git a/google/auth/version.py b/google/auth/version.py
index d675c0b..2ffa8a4 100644
--- a/google/auth/version.py
+++ b/google/auth/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.32.0"
+__version__ = "1.32.1"