build(deps): Bump mypy from 1.5.1 to 1.8.0 in /requirements

Bumps [mypy](https://github.com/python/mypy) from 1.5.1 to 1.8.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.5.1...v1.8.0)

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

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

requirements/requirements_test.txt

@@ -13,7 +13,7 @@ pytest-aiohttp==1.0.5
 pytest-httpserver==1.0.8
 pytest-xdist==3.3.1
 pydocstyle==6.3.0
-mypy==1.5.1
+mypy==1.8.0
 mypy-protobuf==3.5.0
 typed-ast==1.5.5
 types-protobuf==4.24.0.4