nuwa/stage: links for instawell

root/pypi instawell-0.4.0.tar.gz
root/pypi instawell-0.4.0-py3-none-any.whl
root/pypi instawell-0.3.0b1.tar.gz
root/pypi instawell-0.3.0b1-py3-none-any.whl
root/pypi instawell-0.3.0.dev3.tar.gz
root/pypi instawell-0.3.0.dev3-py3-none-any.whl