Bump mypy from 0.812 to 0.902 (#57)

* Bump mypy from 0.812 to 0.902

Bumps [mypy](https://github.com/python/mypy) from 0.812 to 0.902.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.812...v0.902)

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

Signed-off-by: dependabot[bot] <[email protected]>

* Add types-aiofiles as test requirement

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

Author: dependabot[bot]

requirements_test.txt

@@ -1,6 +1,7 @@
 -r requirements_test_pre_commit.txt
-mypy==0.812
+mypy==0.902
 pre-commit==2.13.0
 pylint==2.8.3
 pytest==6.2.4
 pytest-asyncio==0.15.1
+types-aiofiles==0.1.4