CompatHelper: bump compat for "PDMats" to "0.11" for package test (#256)

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Author: github-actions[bot]

test/Project.toml

@@ -24,7 +24,7 @@ Flux = "0.10, 0.11"
 ForwardDiff = "0.10"
 JuliaFormatter = "0.12.2"
 Kronecker = "0.4"
-PDMats = "0.9, 0.10"
+PDMats = "0.9, 0.10, 0.11"
 ReverseDiff = "1.2"
 SpecialFunctions = "0.10, 1"
 Zygote = "0.4, 0.5, 0.6"