v1.22.0

GMT v1.22.0

Diff since v1.21.1

Merged pull requests:

• Improve the functions that let assign color to planar FaceVertices types. (#1586) (@joa-quim)
• Add a 'pagebg' option that lets users paint the background paper with an image. (#1587) (@joa-quim)
• Let flatfv() deal with RGBA images. Either band or pixel interleaved. (#1588) (@joa-quim)
• Let grdtrack operate also on GMTfv's. (#1590) (@joa-quim)
• Auto-crop referenced images to the minimum set by the polygon boundingbox. (#1591) (@joa-quim)
• Let 'isflat' become a vector and change code accordingly. (#1592) (@joa-quim)
• Add function (several methods) to compute cubic bezier curves. 2D & 3D and geogs. (#1593) (@joa-quim)
• Tag version 1.22.0 (#1594) (@joa-quim)

Closed issues:

• Register v"1.21.0" (#1581)
• Add ggplot2-like Features for geom_raster and geom_sf in GMT.jl (#1585)