root/pypi: links for nifty

root/pypi nifty-9.1.0.tar.gz
root/pypi nifty-9.1.0-py3-none-any.whl
root/pypi nifty-9.0.0.tar.gz
root/pypi nifty-9.0.0-py3-none-any.whl
root/pypi nifty-9.0.0rc1.tar.gz
root/pypi nifty-9.0.0rc1-py3-none-any.whl
root/pypi nifty-8.5.7.tar.gz
root/pypi nifty-8.5.7-py3-none-any.whl