rescript-syntax is not compatible with ppxlib < 0.35.0

Uses Ast_406 which has been removed in that version.

Signed-off-by: Marcello Seri <[email protected]>

Author: mseri

packages/rescript-syntax/rescript-syntax.1.0.0/opam

@@ -9,7 +9,7 @@ depends: [
   "dune" {>= "3.8"}
   "ocaml"
   "melange" {= version}
-  "ppxlib" {>= "0.28.0"}
+  "ppxlib" {>= "0.28.0" & < "0.35.0"}
   "odoc" {with-doc}
 ]
 build: [