CompatHelper: bump compat for SymbolicUtils to 0.20, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -68,7 +68,7 @@ SpecialFunctions = "1, 2"
 Static = "0.5, 0.6"
 StatsBase = "0.33"
 StatsFuns = "0.9, 1"
-SymbolicUtils = "0.17, 0.18, 0.19"
+SymbolicUtils = "0.17, 0.18, 0.19, 0.20"
 TransformVariables = "0.5, 0.6"
 TupleVectors = "0.1, 0.2"
 julia = "1.6"