PyPI distribution of 2.x releases contain previous version of Python source code

[bcdarwin]

e.g.,

$ python3 -m venv env
$ source env/bin/activate
$ python3 -m pip install ipyniivue
 ...
$ python3 -c 'from ipyniivue import NiiVue'
 ... # ImportError: cannot import name 'NiiVue' from 'ipyniivue'
$ python3 -c 'from ipyniivue import AnyNiivue'
 # succeeds

inspecting the installed code (or downloading a source tarball) shows that despite the supposed version 2.0.1, obsolete code is included from before the AnyNiivue -> NiiVue rename.