Give room for improbable backports on upper bound

Author: geoffder

packages/OSCADml/OSCADml.0.2.0/opam

@@ -17,7 +17,7 @@ depends: [
   "ocaml" {>= "4.14.0"}
   "gg" {>= "1.0.0"}
   "cairo2" {>= "0.6.2"}
-  "OCADml" {>= "0.3.1" & < "0.3.3"}
+  "OCADml" {>= "0.3.1" & < "0.4.0"}
   "odoc" {with-doc}
 ]
 build: [