Update xiplot and pyodide

[Aggrathon]

This PR updates xiplot and manually triggers the lazy load of jsonschema at the same time as sklearn.
Since a new version of pyodide (with some loading speed improvements) was recently released I updated it as well.

[juntyr]

LGTM

[juntyr]

Just a brief question - why are we now lazily loading jsonschema?

[Aggrathon]

Just a brief question - why are we now lazily loading jsonschema?

Mostly because it is possible (and it slightly reduces the load time)

[juntyr]

Just a brief question - why are we now lazily loading jsonschema?

Mostly because it is possible (and it slightly reduces the load time)

Ok, that makes sense to me. Could we have a unit test to ensure that loading the xiplot library into Python doesn’t need the sklearn and jsonschema imports immediately?

[Aggrathon]

Ok, that makes sense to me. Could we have a unit test to ensure that loading the xiplot library into Python doesn’t need the sklearn and jsonschema imports immediately?

That's a good idea! I've added asserts to the bundle script (as a last safety check) and a unit test in #47.