root/pypi: links for somos

root/pypi somos-0.0.0.tar.gz
root/pypi somos-0.0.0-py3-none-any.whl
root/pypi somos-0.0.0a0.dev0.tar.gz
root/pypi somos-0.0.0a0.dev0-py3-none-any.whl