Remove 1.2.0 from pypi

[stewartrutledge]

1.2.0 is still published to pypi, which means it is still being resolved as a valid version despite having incorrect dependency versions. I think 1.2.0 should be removed since it is a broken release.

Related to: #411

[davidmrdavid]

@stewartrutledge, thanks for the report. I'm also exploring that possibility though it will take me a few more days to be able to execute on it due to permissions and such. I'll look to update this issue with our decision.