CompatHelper: bump compat for AbstractPPL to 0.13 for package test, (keep existing compat)

Author: CompatHelper Julia

test/Project.toml

@@ -30,7 +30,7 @@ Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 [compat]
 ADTypes = "1"
 AbstractMCMC = "5"
-AbstractPPL = "0.11, 0.12"
+AbstractPPL = "0.11, 0.12, 0.13"
 Accessors = "0.1"
 Aqua = "0.8"
 Bijectors = "0.15.1"