Releasing pip 20.3, featuring new dependency resolver
https://pyfound.blogspot.com/2020/11/pip-20-3-new-resolver.html
なぜやるのか
Mozilla and Chan Zuckerberg Initiative to support pip
(2019)
read our meeting notes
https://wiki.python.org/psf/PackagingWG#Dependency_resolver_and_user_experience_improvements_for_pip
https://youtu.be/B4GQCBBsuNU