Remove nest-asyncio

[davidbrochart]

Experimenting with jupyter-client's run_sync which doesn't use nest-asyncio.

[davidbrochart]

@blink1073 This seems to work well!
Do you think we should copy the code from jupyter-client, as it is done in this PR, or extract out jupyter-client's run_sync into a common library?

[davidbrochart]

cc @maartenbreddels @SylvainCorlay

[blink1073]

I'm hesitant to add a whole new library. Perhaps we could put the code in Jupyter Core 5.x and 4.x?

[davidbrochart]

Definitely not a new library just for this. Actually, it may also be fine like that, even though there's a bit of code duplication.

[blink1073]

jupyter_client could use jupyter_core's implementation once it is there.

[davidbrochart]

OK, I'll open PRs.

[blink1073]

We should be able to use meeseeks to backport the PR from main.

[davidbrochart]

This PR needs jupyter/jupyter_core#315.

[davidbrochart]

b77eb06 reapplies #258, which was overridden by #257.

[blink1073]

We shouldn't per-emptively add upper bounds to dependencies, see https://iscinumpy.dev/post/bound-version-constraints/

[davidbrochart]

We shouldn't per-emptively add upper bounds to dependencies, see https://iscinumpy.dev/post/bound-version-constraints/

👍