It's the default version on Ubuntu 12.04 and a stable release.
Did not remove 2.0.1-beta as people are probably using it explicitly.
Fixing syntax error
Adding Sphinx 2.0.4 (the default on Ubuntu 12.04)
There is only a couple of projects that use all those alpha Sphinx versions. It is definitely a time to upgrade. Please remove 2.0.1-beta.
Remove sphinx 2.0.1-beta
Merge pull request #132 from levent/sphinx/2_0_4
Add Sphinx 2.0.4 and make it the default