Test on webkit

[jtpio]

Follow-up to #167

Related to #152

• Add webkit to the UI test matrix
• Add webkit ref snapshot
• Add webkit to the update workflow

[github-actions]

👈 Try it on ReadTheDocs

[jtpio]

Trying to set a higher timeout for webkit as the packages seem to be downloaded at least:

[jtpio]

cc @DerThorsten who I think has a Mac and might be able to try using the xeus python kernel in Safari directly, just to double check.

[jtpio]

Trying to set a higher timeout for webkit as the packages seem to be downloaded at least:

Adding the timeout seems to be helping (although might still be a bit flaky):

[jtpio]

Ah looks like it was stuck in the last CI run: https://github.com/jupyterlite/xeus-python-kernel/actions/runs/6507197878?pr=175

[DerThorsten]

cc @DerThorsten who I think has a Mac and might be able to try using the xeus python kernel in Safari directly, just to double check.

on Version 16.5 (18615.2.9.11.4) on my M2 it works

[jtpio]

One of the failure might actually be related to Galata, as reported in jupyterlab/jupyterlab#15252