chore(deps-dev): bump mypy from 0.931 to 0.942 (#1133)

Bumps [mypy](https://github.com/python/mypy) from 0.931 to 0.942.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.931...v0.942)

---
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>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Simon Thulbourn <[email protected]>

Author: 3 people

poetry.lock

@@ -53,7 +53,7 @@ flake8-eradicate = "^1.2.0"
 flake8-bugbear = "^22.1.11"
 mkdocs-git-revision-date-plugin = "^0.3.1"
 mike = "^0.6.0"
-mypy = "^0.931"
+mypy = "^0.942"
 mkdocs-material = "^8.2.7"