root/pypi: links for skmtpy

root/pypi skmtpy-0.3.1.tar.gz
root/pypi skmtpy-0.3.1-py3-none-any.whl
root/pypi skmtpy-0.3.0.tar.gz
root/pypi skmtpy-0.3.0-py3-none-any.whl