root/pypi: links for choicetypes

root/pypi choicetypes-0.1.0rc1.tar.gz
root/pypi choicetypes-0.1.0rc1-py3-none-any.whl
root/pypi choicetypes-0.1.0rc0.tar.gz
root/pypi choicetypes-0.1.0rc0-py3-none-any.whl