Jupyter-lab is out of date and should be updated

[rchiodo]

We should move to a much newer version.

[DonJayamanne]

Last time i brought this up (#2775), the argument was no need to update if nothing is broken. I even brought this up recently for IpyWidgets 8.0 (#6265)

I'm all for it, but not sure what the criteria is for updating pacakges. i personally think we should always update, but these things tend to get pushed back.

[DonJayamanne]

I think we should update:

• Jupyter lab
• Web pack (remove babel, etc)

[rchiodo]

Okay just going to try updating jupyter lab for now. Worry about webpack later.