Bump mypy from 0.990 to 0.991 (#787)

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:production
  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>

requirements/lint.txt

@@ -1,6 +1,6 @@
 -r ci.txt
 
-mypy==0.990; implementation_name=="cpython"
+mypy==0.991; implementation_name=="cpython"
 flake8==5.0.4
 flake8-pyi==22.10.0
 black==22.10.0