Bump mypy from 0.990 to 0.991 (#320)

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

@@ -24,7 +24,7 @@ pre-commit = "^2.20.0"
 black = "^22.10.0"
 isort = "^5.10.1"
 coverage = {extras = ["toml"], version = "^6.5"}
-mypy = "^0.990"
+mypy = "^0.991"
 detect-secrets = "^1.4.0"
 bandit = "^1.7.0"
 pylint = "^2.15.5"