CompatHelper: add new compat entry for BangBang at version 0.4 for package test, (keep existing compat) (#2444)

Co-authored-by: CompatHelper Julia <[email protected]>

Author: github-actions[bot]

test/Project.toml

@@ -45,6 +45,7 @@ AdvancedMH = "0.6, 0.7, 0.8"
 AdvancedPS = "0.6.0"
 AdvancedVI = "0.2"
 Aqua = "0.8"
+BangBang = "0.4"
 Clustering = "0.14, 0.15"
 Distributions = "0.25"
 DistributionsAD = "0.6.3"