pre-commit args aren't supported

[kowalcj0]

Hi,

First of all, thank you for creating this really handy tool. I tried to pass some extra arguments to pflake8 command using args key https://pre-commit.com/index.html#config-args, but it it looks like this isn't supported. As a workaround I had to add those extra arguments to the entry key.

entry: pipenv run pflake8 --verbose

It'd be great if pre-commit args were supported.

Thanks