Bump types-contextvars from 2.4.2 to 2.4.5

Bumps [types-contextvars](https://github.com/python/typeshed) from 2.4.2 to 2.4.5.
- [Release notes](https://github.com/python/typeshed/releases)
- [Commits](https://github.com/python/typeshed/commits)

---
updated-dependencies:
- dependency-name: types-contextvars
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -10,7 +10,7 @@ flake8==3.9.2
 isort==5.10.1
 mypy==0.950
 types-requests==2.26.3
-types-contextvars==2.4.2
+types-contextvars==2.4.5
 types-PyYAML==6.0.4
 types-dataclasses==0.6.5
 pytest==7.1.2