Force install jupyter_client master

[davidbrochart]

No description provided.

[davidbrochart]

As pointed out by @blink1073, we didn't test jupyter_client master but whatever version was installed by the downstream packages.
With this PR we do and we can see that:

• ipykernel still uses get_msg(block=...). I opened Remove block param from get_msg() ipython/ipykernel#736 to get rid of the block parameter.
• nbclient still uses km.cleanup. I opened Replace km.cleanup with km.cleanup_resources nbclient#152 to replace it with km.cleanup_resources.

[blink1073]

Kicking CI

[davidbrochart]

nbclient has not been released so we're not testing it with jupyter/nbclient#152.

[blink1073]

We can kick this again after upcoming releases of ipykernel and nbclient on Monday.

[blink1073]

Looks like we're still failing one test in nbclient

[blink1073]

Builds are passing in nbclient itself

[davidbrochart]

Looks like we also have all the downstream packages' dependencies pre-release installed, in particular ipywidgets==8.0.0a5 makes the nbclient test fail.

[davidbrochart]

I think this is the normal behavior of the --pre option. Maybe then we should install master versions of downstream packages (without --pre).

[blink1073]

Thank you!