Test notebook prerelease

[blink1073]

This will fail until jupyter/notebook#6616 is merged and released

[blink1073]

Hmm, tests/extension/test_serverextension.py::test_merge_config has started failing and I'm not sure why.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.09%. Comparing base (f6b732c) to head (466f065).
Report is 305 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1064   +/-   ##
=======================================
  Coverage   73.09%   73.09%           
=======================================
  Files          64       64           
  Lines        8266     8266           
  Branches     1640     1640           
=======================================
  Hits         6042     6042           
  Misses       1819     1819           
  Partials      405      405           

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[blink1073]

Oh, the test didn't fail because we weren't testing the tree handler before. Retrying with the notebook 7.0a8 release..

[blink1073]

The order of precedence in jupyter_core 5.0 changed to what our tests had written as the expectation. 😅 Now the sys-prefix takes precedent over user inside a venv. I updated the test.

[blink1073]

@meeseeksdev please backport to 1.x

[lumberbot-app]

Oops, something went wrong applying the patch ... Please have a look at my logs.