nuwa/stage: links for cbl

root/pypi cbl-1.0.1.tar.gz
root/pypi cbl-1.0.1-py3-none-any.whl
root/pypi cbl-0.4.2.tar.gz
root/pypi cbl-0.4.2-py3-none-any.whl
root/pypi cbl-0.2.3.tar.gz
root/pypi cbl-0.2.3-py3-none-any.whl