Merge pull request #119 from SciML/compathelper/new_version/2024-02-22-07-06-21-546-03680167954

CompatHelper: bump compat for ModelingToolkit to 9, (keep existing compat)

Author: ChrisRackauckas

Project.toml

@@ -18,7 +18,7 @@ DataStructures = "0.17, 0.18"
 DiffEqBase = "6.5"
 DocStringExtensions = "0.8, 0.9"
 Latexify = "0.14, 0.15, 0.16"
-ModelingToolkit = "7, 8"
+ModelingToolkit = "7, 8, 9"
 Reexport = "0.2, 1.0"
 SciMLBase = "1.3, 2"
 julia = "1.6"