Merge pull request 'Fix cmdliner deprecations' (#4) from 20220221_fix_cmdliner_deprecations into main

Reviewed-on: https://git.robur.io/robur/opam-graph/pulls/4

app/main.ml

@@ -62,7 +62,8 @@ let file =
   Arg.(required & pos 0 (some file) None & info [ ] ~doc ~docv:"FILE")
 
 let cmd =
-  Term.(const jump $ setup_log $ transitive $ file $ output_format),
-  Term.info "opam_graph" ~version:"%%VERSION%%"
+  let term = Term.(const jump $ setup_log $ transitive $ file $ output_format) in
+  let info = Cmd.info "opam_graph" ~version:"%%VERSION%%" in
+  Cmd.v info term
 
-let () = match Term.eval cmd with `Ok () -> exit 0 | _ -> exit 1
+let () = Cmd.eval cmd |> exit

opam-graph.opam

@@ -9,7 +9,7 @@ license: "ISC"
 depends: [
   "ocaml" {>= "4.08.0"}
   "dune" {>= "2.0.0"}
-  "cmdliner"
+  "cmdliner" {>= "1.1.0"}
   "fmt" {>= "0.8.7"}
   "logs"
   "opam-core"