This update to jupyterlab incorporates several changes:
Support newer versions of jupyterlab (at least up until 1.2.1)
Make nbgather compatible with the updated python-program-analysis. As of last autumn, a few changes were made to python-program-analysis to improve the precision of slicing, though these hadn't yet been incorporated into nbgather.
Add regression tests to nbgather to make sure that slicing is still behaving as expected. This was added to help us detect changes to python-program-analysis that require updates to nbgather
Change the test-runner to jest with the intent to enable cleaner and easier regression testing
Clarify the documentation in the Advanced Setting Editor for user-controllable settings
This update to jupyterlab incorporates several changes: