Merge pull request #231 from SciML/AlCap23-patch-7

Fix MTK and Symbolics for now

Author: ChrisRackauckas

Project.toml

@@ -23,12 +23,12 @@ Compat = "3.0"
 DataInterpolations = "3"
 DiffEqBase = "6"
 DocStringExtensions = "0.7, 0.8"
-ModelingToolkit = "5"
+ModelingToolkit = "5.20"
 ProgressMeter = "1.6"
 QuadGK = "2.4"
 Reexport = "1.0"
 StatsBase = "0.32.0, 0.33"
-Symbolics = "0.1, 1"
+Symbolics = "0.1.32"
 julia = "^1.6.0"
 
 [extras]