Add PDM to the list of alternatives to Pipenv

[pawamoy]

We could also add https://github.com/FFY00/trampolim, but I wanted to see what you think first (and if we add more, all descriptions should probably be made either as comparisons to pipenv, or as pipenv-unrelated descriptions).
I believe these alternatives deserve an entry on this page 🙂

[henryiii]

Trampolim is a build system, not a dependency management solution. Hatch would be another one, but it's not really quite ready (and I think it was mentioned somewhere already).

[pawamoy]

Ah, yes, seeing dependencies in their README example confused me. Hatch is already there ;)

[bhrutledge]

Thanks for this, and apologies for the lag on the review. I've got a couple requests re: your edits. I also made some of my own suggestions to make the list more useful; if those feel like too much, I can do them in a separate PR.

[pawamoy]

Hi @bhrutledge, thanks for the review! Nice suggestions, I applied them. Let me know if there's something else to do.

[bhrutledge]

Excellent! Thank you.