Update jupyter-server

[hbcarlos]

Updates jupyter-server dependency to use jupyter-server>=2,<3

[hbcarlos]

@Zsailer, Why are we pinning jupyer-server=1.8?

[jtpio]

@Zsailer, Why are we pinning jupyer-server=1.8?

Looks like it's jupyter_server~=1.8 using the ~= specifier, not an exact pin, which means it accepts jupyter_server>=1.8,<2?

[hbcarlos]

ooh, that's right. Thanks, @jtpio!

[Zsailer]

Thanks, @hbcarlos. See #12

I don't think we want to require > 2.0. We just need to raise the ceiling on allowed versions of Jupyter Server. JupyterLab 4.0 can require >2, but I don't think we should enforce this on all consumers of notebook_shim.

[hbcarlos]

Thanks, @Zsailer! Makes sense.
Anyway, I'm closing this since you already change it in #12