Avoid depending on the newest 'ocaml-version' library

Author: Julow

lib/Conf.ml

@@ -266,7 +266,7 @@ let default =
       ; disable= elt false
       ; margin_check= elt false
       ; max_iters= elt 10
-      ; ocaml_version= elt Ocaml_version.Releases.v5_4_0
+      ; ocaml_version= elt (Ocaml_version.v ~patch:0 5 4)
       ; quiet= elt false
       ; disable_conf_attrs= elt false
       ; version_check= elt true } }