raise dune lower bound (#61)

Author: jchavarri

melange-json.opam

@@ -12,7 +12,7 @@ license: ["LGPL-3.0-only" "MPL-2.0"]
 homepage: "https://github.com/melange-community/melange-json/"
 bug-reports: "https://github.com/melange-community/melange-json/issues"
 depends: [
-  "dune" {>= "3.9"}
+  "dune" {>= "3.16"}
   "ocaml"
   "melange" {>= "3.0.0"}
   "melange-jest" {with-test}