chore(deps): bump mypy from 1.8.0 to 1.9.0 (#193)

Bumps [mypy](https://github.com/python/mypy) from 1.8.0 to 1.9.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.8.0...1.9.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/test.txt

@@ -11,7 +11,7 @@ pytest-asyncio
 pyfakefs
 freezegun
 
-mypy ==1.8.0
+mypy ==1.9.0
 types-python-dateutil >=2.8.19.3
 types-click >=7.1.8, <9.0
 types-toml >=0.10.8, <0.11