chore(main): release 2.18.1 (#1295)

🤖 I have created a release *beep* *boop*
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## [2.18.1](https://togithub.com/googleapis/google-auth-library-python/compare/v2.18.0...v2.18.1) (2023-05-17)


### Bug Fixes

* Self signed jwt token should be string type ([#1294](https://togithub.com/googleapis/google-auth-library-python/issues/1294)) ([17356fd](https://togithub.com/googleapis/google-auth-library-python/commit/17356fdd92da2123f989f67a5cebf82c78a3bc12))

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

Author: release-please[bot]

CHANGELOG.md

@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-auth/#history
 
+## [2.18.1](https://github.com/googleapis/google-auth-library-python/compare/v2.18.0...v2.18.1) (2023-05-17)
+
+
+### Bug Fixes
+
+* Self signed jwt token should be string type ([#1294](https://github.com/googleapis/google-auth-library-python/issues/1294)) ([17356fd](https://github.com/googleapis/google-auth-library-python/commit/17356fdd92da2123f989f67a5cebf82c78a3bc12))
+
 ## [2.18.0](https://github.com/googleapis/google-auth-library-python/compare/v2.17.3...v2.18.0) (2023-05-10)
 
 

google/auth/version.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.18.0"
+__version__ = "2.18.1"