Merge pull request #86 from SciML/compathelper/new_version/2021-12-15-00-44-47-629-00525259585

CompatHelper: bump compat for SymbolicUtils to 0.19, (keep existing compat)

Author: ChrisRackauckas

Project.toml

@@ -19,7 +19,7 @@ MathML = "0.1.9"
 Memoize = "0.4"
 ModelingToolkit = "7, 8"
 Setfield = "0.7"
-SymbolicUtils = "0.16, 0.18"
+SymbolicUtils = "0.16, 0.18, 0.19"
 julia = "1.6"
 
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