root/pypi: links for seisflows

root/pypi seisflows-2.3.1.tar.gz
root/pypi seisflows-2.3.1-py3-none-any.whl
root/pypi seisflows-2.3.0.tar.gz
root/pypi seisflows-2.3.0-py3-none-any.whl
root/pypi seisflows-2.2.0.tar.gz
root/pypi seisflows-2.2.0-py3-none-any.whl