Change from jupyter_server to jupyterlite-core jupyterlab (#449)

Author: mcbarton

.github/workflows/deploy-pages.yml

@@ -185,7 +185,7 @@ jobs:
           cd ./xeus-cpp/
           micromamba create -n xeus-lite-host jupyterlite-core -c conda-forge
           micromamba activate xeus-lite-host
-          python -m pip install jupyterlite-xeus jupyter_server notebook libarchive-c
+          python -m pip install jupyterlite-xeus jupyterlite-core jupyterlab notebook libarchive-c
           jupyter lite build --XeusAddon.prefix=${{ env.PREFIX }} --contents notebooks/xeus-cpp-lite-demo.ipynb --output-dir dist
           cp ${{ env.PREFIX }}/bin/xcpp.data dist/extensions/@jupyterlite/xeus/static
           cp ${{ env.PREFIX }}/lib/libclangCppInterOp.so dist/extensions/@jupyterlite/xeus/static