Merge pull request #23 from SciML/compathelper/new_version/2020-10-27-23-17-48-748-1216815880

CompatHelper: bump compat for "ModelingToolkit" to "4.0"

Author: ChrisRackauckas

Project.toml

@@ -11,7 +11,7 @@ Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 [compat]
 DiffEqBase = "6.5"
 MATLAB = "0.7"
-ModelingToolkit = "1.4.2, 2.0, 3.0"
+ModelingToolkit = "1.4.2, 2.0, 3.0, 4.0"
 Reexport = "0.2"
 julia = "1"