Support ipywidgets 8

[bollwyvl]

References

• fixes #98

Changes

• [x] accept new/old ipywidgets
• [x] accept new/old @jupyter-widgets/*
• [x] fix tests
• [x] update docs
  • [x] handle theme changes

[codecov[bot]]

Codecov Report

Merging #99 (988dfe9) into master (90fc15c) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #99   +/-   ##
=======================================
  Coverage   97.12%   97.12%           
=======================================
  Files          21       21           
  Lines         730      730           
  Branches       91       91           
=======================================
  Hits          709      709           
  Misses         12       12           
  Partials        9        9           

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