build(deps-dev): bump mypy from 0.990 to 0.991 (#296)

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] <support@github.com>

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

pyproject.toml

@@ -48,7 +48,7 @@ flake8-eradicate = "^1.4.0"
 flake8-markdown = "^0.3.0"
 flake8-simplify = "^0.19.3"
 isort = "^5.10.1"
-mypy = "^0.990"
+mypy = "^0.991"
 pre-commit = "^2.20.0"
 pre-commit-hooks = "^4.3.0"
 pylint = "^2.15.5"