CompatHelper: bump compat for UnicodePlots to 2, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -94,7 +94,7 @@ Requires = "1.0.1"
 StatsBase = "0.32, 0.33"
 StatsModels = "0.6"
 TikzPictures = "3"
-UnicodePlots = "1"
+UnicodePlots = "1, 2"
 ValueHistories = "0.5"
 julia = "1.5"