[Distutils] prepping PEP 566 support in Twine for tomorrow

[Sumana Harihareswara]

Per
https://dustingram.com/articles/2018/03/16/markdown-descriptions-on-pypi
, currently, Markdown support for a package long_description depends on
a pre-release of Twine. I released Twine 1.11.0rc1 a few days ago. Today
I'm fixing more bugs and putting out another release candidate, and then
tomorrow I plan to release 1.11.0. Code review and testing is welcome,
as is camaraderie in #pypa-dev on Freenode.

-- 
Sumana Harihareswara
Changeset Consulting
https://changeset.nyc