Update SymbolicUtils compat

Author: YingboMa

Project.toml

@@ -52,7 +52,7 @@ RuntimeGeneratedFunctions = "0.4, 0.5"
 SafeTestsets = "0.0.1"
 SpecialFunctions = "0.7, 0.8, 0.9, 0.10, 1.0"
 StaticArrays = "0.10, 0.11, 0.12, 1.0"
-SymbolicUtils = "0.7.3"
+SymbolicUtils = "0.7.4"
 TreeViews = "0.3"
 UnPack = "0.1, 1.0"
 Unitful = "1.1"