Bump to Ghostscript 10.06.0

[seisman]

Check if GMT 6.5 works well with gs 10.05 and 10.06.

[seisman]

There are ~10 failures with gs 10.05.1, but these failures are all caused by tiny differences (See the artifacts in https://github.com/GenericMappingTools/pygmt/actions/runs/18094291533?pr=4125). So GMT 6.5 works well with gs 10.05.1!

Edit: Same for gs 10.06.0

[github-actions]

Summary of changed images

This is an auto-generated report of images that have changed on the DVC remote

Status	Path
modified	pygmt/tests/baseline/test_contour_interval.png
modified	pygmt/tests/baseline/test_contour_matrix.png
modified	pygmt/tests/baseline/test_contour_multiple_levels.png
modified	pygmt/tests/baseline/test_contour_one_level.png
modified	pygmt/tests/baseline/test_contour_vec.png
modified	pygmt/tests/baseline/test_text_transparency.png
modified	pygmt/tests/baseline/test_text_varying_transparency.png

Image diff(s)

Added images

Modified images

Path	Old	New
test_contour_interval.png
test_contour_matrix.png
test_contour_multiple_levels.png
test_contour_one_level.png
test_contour_vec.png
test_text_transparency.png
test_text_varying_transparency.png

Report last updated at commit abee012

[yvonnefroehlich]

Great 🙂 that there are no transparency-issues with the higher gs versions!