Update to Pyodide 0.23, update mocks

[bollwyvl]

References

• includes Update to Pyodide 0.23.0a1 #20

Changes

• Update to jupyterlite-core >=0.1.0b22
• bump pyodide all over (hopefully)
• tests
  • fix fixtures (see Update to jupyterlite-core==0.1.0b22 #34 (comment))
  • restore some repo checks lost with doit (grabbed from Generate pyodide repodata, add more mocks #27)
• bump mocks
  • widgetsnbextension shim (see Use the comm package #37 (comment))
  • update requires-python for all

Follow-on

• investigate whether micropip 0.3.0 features might simplify some things

[github-actions]

👈 Try it on ReadTheDocs

[bollwyvl]

Everything working like a boss on RTD (such as it is), just the one deprecation to fix. Widgets looking fine.

There's probably some more things to explore, but it's probably worthwhile to get this onto main (or even out as a pre) so we can start banging on it in more places. Will probably do a lite PR pulling in wheels from here, maybe resurrect the conda/wheel resolving stuff so we can get a clear look at the demos before calling it done-done.

[bollwyvl]

Looking fine over on:

https://jupyterlite--1031.org.readthedocs.build/en/1031/_static/lab/

Well, ipyvue and ipyvuetify aren't working much at all, due to some lagging conda-forge packages, but presumably that can get resolved by the time that pr got less hacky

[jtpio]

Thanks!