`twine check dist/*` results in "InvalidDistribution: Invalid distribution metadata. This version of twine supports Metadata-Version 1.0, 1.1, 1.2, 2.0, 2.1, and 2.2"

In trying to release a working ipywidget, I’m observing what this user writes about: jupyter-widgets/widget-ts-cookiecutter#112

Does anyone have any guidance on this?

It appears that we have a viable approach here: Publishing custom JupyterWidget · Issue #112 · jupyter-widgets/widget-ts-cookiecutter · GitHub