jupyter-packaging pinning is broken

[twavv]

trafficstars

This cookiecutter pins the version of jupyter_packaging but this breaks because JupyterLab wants to use a different version.

https://github.com/travigd/ipydraw/runs/2454430067?check_suite_focus=true#step:7:305

[jtpio]

Thanks @travigd for the report.

Looks like we might need to apply a similar update as in https://github.com/jupyterlab/extension-cookiecutter-ts/pull/143