nuwa/stage: links for pack-my-code

root/pypi pack_my_code-0.3.4.tar.gz
root/pypi pack_my_code-0.3.4-py3-none-any.whl
root/pypi pack_my_code-0.3.3.tar.gz
root/pypi pack_my_code-0.3.3-py3-none-any.whl