Bump mypy from 0.990 to 0.991 (#673)

Bumps [mypy](https://github.com/python/mypy) from 0.990 to 0.991.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.990...v0.991)

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

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

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

Author: dependabot[bot]

poetry.lock

@@ -29,7 +29,7 @@ pre-commit = "^2.20"
 black = {version = "^22.10", allow-prereleases = true}
 pylint = "^2.13.9"
 isort = "^5.10.1"
-mypy = "^0.990"
+mypy = "^0.991"
 flake8 = "^5.0.4"
 pyupgrade = "^3.2.2"
 pytest-asyncio = "^0.20.2"