jupyter-notebook packaging
--------------------------

As of v7, jupyter-notebook is now an extension to jupyterlab, served by jupyter-server, and therefore much of the functionality inherent to previous versions of this package have moved elsewhere.

Building the typescript @jupyter-notebook libs and webpack browser artifact is tightly-coupled to jupyterlab, and this probably means that this package needs to be kept at least in minor-version sync with jupyterlab - see d/nodejs/extlinks for the number of points of integration which need to match.
