v1.5.9

Plots v1.5.9

Diff since v1.5.8

Closed issues:

• Histogram for strings? (categorical) (#2123)
• [BUG] Where did the :RdBu_r diverging colormap go? (#2892)

Merged pull requests:

• CompatHelper: bump compat for "FFMPEG" to "0.4" (#2891) (@github-actions[bot])
• fix saving as .tikz (#2901) (@BeastyBlacksmith)
• Enable snoopcompile bot on all branches again (#2902) (@BeastyBlacksmith)
• Fix error when setting animation loop count (#2904) (@ztangent)