Update dependency to use updated Xeus (3.0) modules

[jcfr]

From @SylvainCorlay

I just wanted to give you a heads up that we have made a major release of Xeus (3.0), and updated the entire xeus stack for this new release.

The main change is the split of the xeus xserver implementations in separate packages (so that the zeromq xserver is in its own package). Codewise, this should not change much for downstream projects, but this helps streamlining the use of xeus-based kernels in JupyterLite!