Bump Mooncake compat in tests

Author: penelopeysm

test/Project.toml

@@ -53,7 +53,7 @@ LinearAlgebra = "1"
 LogDensityProblems = "2"
 LogDensityProblemsAD = "1.4"
 MCMCChains = "5, 6"
-Mooncake = "0.4.9"
+Mooncake = "0.4.19"
 NamedArrays = "0.9.4, 0.10"
 Optim = "1"
 Optimization = "3"