build(deps-dev): bump mypy from 0.800 to 0.812

Bumps [mypy](https://github.com/python/mypy) from 0.800 to 0.812.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.800...v0.812)

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

Pipfile

@@ -13,7 +13,7 @@ pytest-timeout = "==1.4.2"
 mock = "==4.0.3"
 pre-commit = "==2.10.1"
 commitizen = "==2.14.2"
-mypy = "==0.800"
+mypy = "==0.812"
 flake8 = "==3.8.4"
 isort = "==5.7.0"
 controllerx = {path = ".", editable = true}