CompatHelper: bump compat for "GR" to "0.50" (#58)

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

Author: github-actions[bot]

Project.toml

@@ -11,7 +11,7 @@ Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 
 [compat]
-GR = "0.46, 0.47, 0.48, 0.49"
+GR = "0.46, 0.47, 0.48, 0.49, 0.50"
 ReinforcementLearningBase = "0.7"
 Requires = "1.0"
 StatsBase = "0.32, 0.33"