Update python-ipympl to rev 8 via SR 942376
    
    https://build.opensuse.org/request/show/942376
    by user bnavigator + dimstar_suse
    - Update to v0.8.4 w/ jupyter-matplotlib v0.10.4
      * Try fixing the automatic release CI job by @martinRenou in #408
      * Improve toolbar positioning by @martinRenou in #407
    - Release 0.8.3
      * Update CI badge for github actions by @ianhi in #384
      * Add configurable throttling for pan_zoom by @martinRenou in
        #393
      * Webpack: Remove docs build by @martinRenou in #394
      * Slow down pre-commit autoupdates by @ianhi in #398
      * Fix nbconvert pdf export by @martinRenou in #404
      * Refactor image embedding logic and fix nbconvert HTML export by
        @martinRenou in #406
      * Refactor toolbar by @martinRenou in #396
    - Release 0.8.2
      * Fix issue with Pyolite workaround #382
    - Release 0.8.1
      * Save plot image in the Widget model #376
      * Mock Tornado for JupyterLite #381
      * Fix DPI for static