Update python-altair to version 5.2.0 / rev 15 via SR 1153601
    
    https://build.opensuse.org/request/show/1153601
    by user mcepl + dimstar_suse
    - Update to 5.2.0:
      - Update Vega-Lite from version 5.15.1 to version 5.16.3
      - Support offline HTML export using vl-convert
      - Support saving charts as PDF files using the vl-convert
        export engine
      - Support converting charts to sharable Vega editor URLs with
        chart.to_url()
      - Pass format_locale and time_format_locale through to
        vl-convert to support locales in static image export
      - Vega-Altair is now a typed package, with type annotations for
        all public functions and classes and some of the internal
        code
      - Vega-Altair is tested against Python 3.12