Also look in static for license files

[bollwyvl]

It looks like a fair number of packages have started including third-party-licenses.json, but they have not been showing up in the UI/CLI.

The simple reason here being that @jupyterlab/builder puts them in static (as opposed to next to package.json).

This PR checks in both locations, and adds a test for the more common static case.

[blink1073]

Kicked the check release jobs

[codecov-commenter]

Codecov Report

Merging #238 (a418d63) into main (d577120) will decrease coverage by 0.63%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #238      +/-   ##
==========================================
- Coverage   76.96%   76.33%   -0.64%     
==========================================
  Files          28       29       +1     
  Lines        2071     2227     +156     
==========================================
+ Hits         1594     1700     +106     
- Misses        477      527      +50     

Impacted Files	Coverage Δ
jupyterlab_server/licenses_handler.py	100.00% <100.00%> (ø)
jupyterlab_server/tests/test_licenses_api.py	100.00% <100.00%> (ø)
jupyterlab_server/handlers.py	87.80% <0.00%> (-0.02%)	⬇️
jupyterlab_server/tests/test_settings_api.py	100.00% <0.00%> (ø)
jupyterlab_server/workspaces_app.py	36.47% <0.00%> (ø)
jupyterlab_server/workspaces_handler.py	87.02% <0.00%> (+2.27%)	⬆️
jupyterlab_server/settings_utils.py	86.04% <0.00%> (+2.47%)	⬆️
jupyterlab_server/__init__.py	90.00% <0.00%> (+2.50%)	⬆️

---

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[blink1073]

Thank you!

[bollwyvl]

thanks for the speedy review, and sorry for not checking it out sooner.