CompatHelper: bump compat for JSON to 1, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -24,7 +24,7 @@ BitBasis = "0.9"
 DocStringExtensions = "0.9"
 Graphs = "1"
 InteractiveUtils = "1"
-JSON = "0.21.4"
+JSON = "0.21.4, 1"
 JuMP = "1"
 LinearAlgebra = "1"
 MLStyle = "0.4"