graphics/gpxsee: Update to 7.20

Changelog:

• Update to version 7.20
  • Added support for Suunto SML files.
  • Various IMG maps improvements.
    
    -Update to version 7.19
  • Fixed/improved pause detection.
  • Fixed buffer overflow in GPI parser.
  • OpenStreetMap and 4UMaps URL changes.
  • Minor IMG file format reader fixes/improvements.
  • Fixed/improved tooltip/popups handling.
  • Translations updates.

https://build.opensuse.org/package/view_file/home:tumic:GPXSee/gpxsee/gpxsee.changes

PR: 243754
Reported by: Nikolay Korotkiy (maintainer)
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D24259