root/pypi: links for silkworm

root/pypi silkworm-0.0.2.1.tar.gz
root/pypi silkworm-0.0.2.1-py3-none-any.whl
root/pypi silkworm-0.0.2.tar.gz
root/pypi silkworm-0.0.2-py3-none-any.whl