Update python-widgetsnbextension to version 4.0.2 / rev 6 via SR 998370
https://build.opensuse.org/request/show/998370
by user bnavigator + dimstar_suse
- specfile:
* require python >= 3.7
* require jupyter-packaging
* added js license file
- update to version 4.0.2 with jupyter-js-widgets@8.0.2
* no relase notes