- Use wxGTK3 instead of GTK2 wxWidgets.
- Update to gnuplot 5.4.3
* NEW "set pm3d border retrace" will use quadrangle color for the border
* NEW "nogrid" flag for plots to opt out of dgrid3d processing
* NEW option "above|below y=" for "plot with fillsteps"
* NEW "set style histogram nokeyseparators" suppress blank key entries Bug #2473
* CHANGE always allow palette color for non-plot elements of 2D plot
* FIX contours were incorrectly allocated space in the key even if "notitle"
* FIX evaluation of unary minus in front of ternary operator Bug #2468
* FIX arm and s390 require "signed char" Bugs #2467 #2450
* FIX range errors if "smooth csplines" applied with x-axis reversed Bug #2465
* FIX handle various corner cases found by fuzzing
* FIX textcolor should accept "linetype N" Bug #2459
* FIX Windows: handling of Window messages for piped input Bugs #2204 #2412
* FIX aquaterm: auto-configuration use of Frameworks Bug #2419
* FIX qt: pm3d quadrangle borders for transparent surfaces
* FIX png/gif: gdlib auto-configuration issues
* FIX dumb: limit enhanced text markup to single-line vertical displacement
- This update fixes CVE-2021-44917 (boo#1194017)
- Port patches
* gnuplot-4.6.0.dif
* gnuplot-gd.patch
- Use wxGTK3 instead of GTK2 wxWidgets.