Compatibility with Plotly 6.0

[philippjfr]

• Fix issues with base64 encoded data
• Remove use of deprecated scatter_mapbox in tests
• Ignore bogus deprecation warning

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.78%. Comparing base (ad35f88) to head (b5b41de).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7681      +/-   ##
==========================================
- Coverage   86.78%   86.78%   -0.01%     
==========================================
  Files         346      346              
  Lines       52349    52354       +5     
==========================================
+ Hits        45432    45433       +1     
- Misses       6917     6921       +4     

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