Use dune --release
    
    Specifically this avoids these warn-errors:
    
    File "tests/DebianPackages/debGrep.ml", line 29, characters 17-31:
    29 |     let stream = Stream.of_list (List.tl (Array.to_list Sys.argv)) in
                          ^^^^^^^^^^^^^^
    Error (alert deprecated): module Stdlib.Stream
    Use the camlp-streams library instead.
    
    More generally it's how packages get built in opam so we should
    probably do that everywhere.