CompatHelper: bump compat for "GR" to "0.54" (#124)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

Project.toml

@@ -15,7 +15,7 @@ Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 
 [compat]
-GR = "0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53"
+GR = "0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54"
 IntervalSets = "0.5"
 MacroTools = "0.5"
 OrdinaryDiffEq = "5"