CompatHelper: bump compat for DiffEqCallbacks to 4, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -23,7 +23,7 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Aqua = "0.5"
 ControlSystemsBase = "1.3"
 DelayDiffEq = "5.31"
-DiffEqCallbacks = "2.16, 3"
+DiffEqCallbacks = "2.16, 3, 4"
 ForwardDiff = "0.10"
 Hungarian = "0.6, 0.7"
 OrdinaryDiffEq = "6.60"