Fix long description content type for PYPI

[kinow]

Hi,

Saw the description of the project in PYPI, and also #79. I contribute to a project that also displays its README.md as long description. But in order for the formatting to be correctly rendered, we needed to set the content type in the setup.py.

This pull request simply adds that to the setup.py here too :-)

Cheers
Bruno

[vsoch]

Awesome! I had wondered how to do this. I'll merge now, and the update on pypi will coincide with a future release. Thanks for the fix!

[vsoch]

hey @kinow ! Just a quick question - I updated sregistry-cli today and added the metadata to render the long description as markdown... is this what it's supposed to look like? -> https://pypi.org/project/sregistry/

[kinow]

hey @vsoch that's not how it's supposed to look like. Have you uploaded via twine? When doing changes like this, I find that using the Test instance of PYPI can be helpful too (though you need to create yet another account there...). But that way you can play with the setup.py and see if we missed anything.

[kinow]

Oh, it says "Last released: Feb 7, 2019", so I believe you uploaded a new version. Weird the readme not being correctly rendered.

[vsoch]

Ah that must be it! Nope I'm not using twine yet, but I'll do that next time (and poke you on here with an update!) Thanks for letting me know this, I've actually been trying to figure it out for a bit (and it fails each time).

[kinow]

Thank you @vsoch ! Hopefully it will work next time :-)