Bump mypy from 0.961 to 0.971 (#258)

Bumps [mypy](https://github.com/python/mypy) from 0.961 to 0.971.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.961...v0.971)

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

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

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

Author: dependabot[bot]

poetry.lock

@@ -31,7 +31,7 @@ certifi = "^2022.5.18"
 
 [tool.poetry.dev-dependencies]
 black = "^22.6.0"
-mypy = "^0.961"
+mypy = "^0.971"
 types-urllib3 = "^1.26.16"
 Sphinx = "^5.1.0"
 sphinx-rtd-theme = "^1.0.0"