docs: document the logging_config trait

[oliver-sanders]

Addresses #684

~(will fail CI until Traitlets 5.2.1 is released)~

• Bump minimum traitlets version from 5.1 to 5.2.1 (not yet released).
  • This gives us access to the logging_config trait.
  • Don't know if you want to bump the traitlets version or just add a note that this is a new feature of Traitlets 5.2.0.
  • Note Traitlets 5.2.0 has a couple of bugs so best to wait for 5.2.1 before advertising this.
• Document how to use logging_config with Jupyter Server / extension applications.
  • Addresses #684
  • Provide examples for pointing Jupyter Server & extension application output at a file.

[blink1073]

I think depending on traitlets >= 5.2.1 sounds good, since this is targeting 2.0

[codecov-commenter]

Codecov Report

Base: 75.14% // Head: 75.14% // No change to project coverage :thumbsup:

Coverage data is based on head (884a47a) compared to base (cf902ea). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #844   +/-   ##
=======================================
  Coverage   75.14%   75.14%           
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  Files          63       63           
  Lines        8225     8225           
  Branches     1635     1635           
=======================================
  Hits         6181     6181           
  Misses       1624     1624           
  Partials      420      420           

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[oliver-sanders]

(deconflicted)

[blink1073]

I pushed a change to increase the minimum to 5.3, since I had some difficulties with the 5.2.x traitlets releases 😅