Issue of required black version

[kazyam53]

In setup.py, required version of black is,

"black>=19.10b0,<=20.8",

But it's written to install black==21.10b0 on README.md.
And it cause error during executing black.

[sergeant-wizard]

If you are using pysen by pip install pysen[lint] and have experienced the issue reported in psf/black#2964, we'll address the issue by #13 which will be available in the next release.

Otherwise if your issue is specific to black==21.10b0 please report the problem with some detailed error logs.
Please note that the version specification your are referring to is merely for scenarios where pysen is installed by pip install pysen[lint]. By no means does it imply that pysen is incompatible with versions not specified there.
Indeed we think pysen is compatible withblack==21.10b0, and that is why we describe it as an example in our README.

[kazyam53]

I use it on poetry so I can't install black==21.10b0 because of it's dependancy.
But I have downgraded click to 8.0.4 as you did on your new version and it worked.
Thank you for your support!