chore: poetry(deps-dev): bump mypy from 0.910 to 0.920 (#103)

Bumps [mypy](https://github.com/python/mypy) from 0.910 to 0.920.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.910...v0.920)

---
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

@@ -58,7 +58,7 @@ types-toml = "^0.10.0"
 pdoc3 = "^0.10.0"
 tox = "^3.24.3"
 coverage = "^6.2"
-mypy = "^0.910"
+mypy = "^0.920"
 flake8 = "^3.9.2"
 flake8-annotations = "^2.0"
 flake8-bugbear = "^21.11.29"