root/pypi: links for dvc-stage

root/pypi dvc_stage-1.0.0.tar.gz
root/pypi dvc_stage-1.0.0-py3-none-any.whl
root/pypi dvc_stage-1.0.0rc5.tar.gz
root/pypi dvc_stage-1.0.0rc5-py3-none-any.whl