David Koop

See #6989 for comments and code to get pydeck working with JupyterLab 3 (including as a prebuilt extension)

#7011 contains the ipywidgets fixes. Want to review the prebuilt code but will plan to submit a PR for that too.

Correct, although even notebook will now be built on jupyterlab infrastructure ([ref](https://jupyter.org/enhancement-proposals/79-notebook-v7/notebook-v7.html)). I think you could keep the other method (current install process) working for the other modes, but these...

As @kylebarron noted, Notebook 7 introduces [extension changes](https://jupyter-notebook.readthedocs.io/en/latest/migrate_to_notebook7.html) as it moved to lab architecture. This PR was a push to update the pydeck extension a while back, but I haven't...