Merge packaging changes into conda recipe

[dholth]

Checklist

• I added a descriptive title
• I searched open reports and couldn't find a duplicate

What happened?

The doc_url and license_url particularly can be copied from https://github.com/AnacondaRecipes/conda-package-handling-feedstock/pull/8/files#diff-f3725a55bf339595bf865fec73bda8ac99f283b0810c205442021f29c06eea9a

We might want to fix long_description in the setup.py packaging (use the README file) and make sure its documentation url (just url=?) is good.

Conda Info

No response

Conda Config

No response

Conda list

No response

Additional Context

No response

[github-actions]

Hi there, thank you for your contribution!

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