build(deps-dev): bump mypy from 0.812 to 0.901 (#145)

Bumps [mypy](https://github.com/python/mypy) from 0.812 to 0.901.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.812...v0.901)

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

Signed-off-by: dependabot[bot] <support@github.com>

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

pyproject.toml

@@ -33,7 +33,7 @@ flake8-bugbear = "^21.4.3"
 flake8-isort = "^4.0.0"
 flake8-pyi = "^20.10.0"
 isort = "^5.8.0"
-mypy = "^0.812"
+mypy = "^0.901"
 pytest = "^6.2.4"
 pytest-cov = "^2.12.1"
 pytest-mock = "^3.6.1"