nuwa/stage: links for pyvtools

root/pypi pyvtools-1.3.1.tar.gz
root/pypi pyvtools-1.3.1-py3-none-any.whl
root/pypi pyvtools-1.3.tar.gz
root/pypi pyvtools-1.3-py3-none-any.whl
root/pypi pyvtools-1.2.0.tar.gz
root/pypi pyvtools-1.2.0-py3-none-any.whl
root/pypi pyvtools-1.1.tar.gz
root/pypi pyvtools-1.1-py3-none-any.whl