Last commit breaks pytest-black under poetry

[tr11]

The commit 584c2d1 for pipenv support breaks existing installs with the poetry package manager. This is in all similar to the bug described in peterjc/flake8-black#23, which is referenced from the pipenv issue listed on the commit.

As a workaround, one can do what's mentioned on peterjc/flake8-black#23 (comment), but it would be great if one can just install pytest-black as before the commit above.

[paddycarey]

Hi @tr11 thanks for the report.

This is somewhat frustrating, it seems we can support either pipenv or poetry, but not both at the same time until black releases a non-prerelease version. I'm inclined to leave the versioning as-is and add the same workaround note to the README as in the linked flake8-black issue.

I'll try to get to this soon, but happy to accept a PR with the updates too.

[tr11]

@paddycarey, I'll submit a PR this weekend to add the info to the readme. Thanks!