How can I know if tox offer support for a specific tool?
To be specific, I'd like to know why this tox.ini section works for flake8:
[flake8]
max-line-length = 120 # works like a charm
[testenv:flake8]
deps = flake8
commands = flake8 mypackage/
and this one does not for mypy:
[mypy]
ignore-missing-imports = True # won't be taken into account
[testenv:mypy]
deps = mypy
commands = mypy mypackage/