Add a mypy pre-commit hook

    - flake8-return

    - flake8-sfs

    - flake8-tabs

- repo: https://github.com/pre-commit/mirrors-mypy

  rev: v0.910

  hooks:

  - id: mypy

    args: [--config=setup.cfg]

    additional_dependencies: [anyio, trio-typing]

    exclude: setup\.py

[isort]

force_single_line = true

[mypy]

strict = true

warn_unreachable = true

implicit_reexport = true

follow_imports = skip

[flake8]

max-line-length = 92

max-doc-length = 92