update to cmdliner 1.1.0 api

bin/bin/convert_md.ml

@@ -241,9 +241,8 @@ let out_type =
 
 let main =
   let doc = "Pre-process markdown files to produce OCaml code." in
-  let exits = Term.default_exits in
-  Term.(const run $ file $ output $ out_type),
-  Term.info "output" ~doc ~exits
-  (* Term.(ret (const main $ Cli.setup)), *)
+  let exits = Cmd.Exit.defaults in
+  let term = Term.(const run $ file $ output $ out_type) in
+  Cmd.(v (info "output"~doc ~exits) term)
 
-let () = Term.(exit_status @@ eval main)
+let () = exit @@ Cmd.eval' ~catch:false main

dune-project

@@ -23,7 +23,7 @@ second edition book. See https://realworldocaml.org/")
   async
   atdgen
   base
-  cmdliner
+  (cmdliner (>= 1.1.0))
   cohttp-async
   conf-ncurses
   conf-tzdata

rwo.opam

@@ -16,7 +16,7 @@ depends: [
   "async"
   "atdgen"
   "base"
-  "cmdliner"
+  "cmdliner" {>= "1.1.0"}
   "cohttp-async"
   "conf-ncurses"
   "conf-tzdata"