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

Author: CompatHelper Julia

Project.toml

@@ -25,7 +25,7 @@ AbstractMCMC = "2, 3, 4, 5"
 Accessors = "0.1"
 DensityInterface = "0.4"
 Distributions = "0.25"
-JSON = "0.19 - 0.21"
+JSON = "0.19 - 0.21, 1"
 LinearAlgebra = "<0.0.1, 1.10"
 Random = "1.6"
 StatsBase = "0.32, 0.33, 0.34"