root/pypi: links for nngen

root/pypi nngen-1.3.4.tar.gz
root/pypi nngen-1.3.3.tar.gz
root/pypi nngen-1.3.2.tar.gz
root/pypi nngen-1.3.1.tar.gz
root/pypi nngen-1.3.0.tar.gz