Merge pull request #253 from SciML/compathelper/new_version/2021-08-05-18-09-24-304-2605490563

CompatHelper: bump compat for "Symbolics" to "2"

Author: AlCap23

Project.toml

@@ -34,7 +34,7 @@ Reexport = "1.0"
 Requires = "1"
 StatsBase = "0.32.0, 0.33"
 SymbolicRegression = "^0.6.11"
-Symbolics = "^1.2.2"
+Symbolics = "^1.2.2, 2"
 julia = "^1.6.0"
 
 [extras]