update test environment

Author: mileslucas

test/Project.toml

@@ -11,3 +11,15 @@ StableRNGs = "860ef19b-820b-49d6-a774-d7a799459cd3"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 StatsFuns = "4c63d2b9-4356-54db-8cca-17b64c39e42c"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[compat]
+AbstractMCMC = "4"
+Distributions = "0.25"
+IterTools = "1"
+KernelDensity = "0.6"
+LogExpFunctions = "0.3"
+MCMCChains = "5"
+StableRNGs = "1"
+StatsBase = "0.33"
+StatsFuns = "0.9"
+