Update to drawio 20.5.0

[bollwyvl]

Changes

• [x] deps
  • [x] add ssort
  • [x] update to jupyterlab 3.5.0
  • [x] update to jupyterlite 0.1.0b14
  • [x] update to typescript 4.8.4
  • [x] update to typedoc 0.23.20
  • [x] update to lerna 6.0.1
  • [x] add jupyterlab deck
  • [x] remove retrolab
• [x] drawio 20.5.0
  • [x] update widget patch
• [x] test
  • [x] drop testing of retrolab
  • [x] update command palette opening
  • [x] update widget value changing
• [x] docs
  • [x] update changelog

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 97.12%. Comparing base (c094c53) to head (b09d23b).

Files with missing lines	Patch %	Lines
...s/ipydrawio-export/src/ipydrawio_export/manager.py	95.77%	0 Missing and 3 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #104 +/- ## ========================================== - Coverage 97.39% 97.12% -0.28% ========================================== Files 21 21 Lines 730 730 Branches 91 78 -13 ========================================== - Hits 711 709 -2 Misses 12 12 - Partials 7 9 +2 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.