Change python requirement to non-tilde expression

[mitchdost]

Hello,

First, I appreciate all the work and effort you put into the development and maintenance of your software.

I would like to use docstrfmt in neovim with mason and mason-tool-installer but mason does not support that tilde version comparator requires-python = "~=3.8".

So I ask if you would mind to change this expression to something like >=3.8,<4. After that change I would be able to create a PR for a new package docstrfmt at mason-registry and after that it could easily be auto-installed with mason-tool-installer.nvim.

Thank you for considering this request!

Best regards,
Mitch