ocamlPackages.csv: use Dune 2

pkgs/development/ocaml-modules/csv/default.nix

···
   pname = "csv";
 	version = "2.4";
 
+	useDune2 = true;
+
 	src = fetchurl {
 		url = "https://github.com/Chris00/ocaml-${pname}/releases/download/${version}/csv-${version}.tbz";
 		sha256 = "13m9n8mdss6jfbiw7d5bybxn4n85vmg4zw7dc968qrgjfy0w9zhk";

pkgs/development/ocaml-modules/csv/lwt.nix

···
 
 buildDunePackage {
   pname = "csv-lwt";
-  inherit (csv) src version meta;
+  inherit (csv) src version useDune2 meta;
 
   propagatedBuildInputs = [ csv ocaml_lwt ];