Update version constants, bump stanza version to 2.4

Signed-off-by: Jules Aguillon <juloo.dsi@gmail.com>

.travis-ci.sh

@@ -6,7 +6,7 @@ OPAMYES="true"; export OPAMYES
 OPAM_VERSION="2.0.5"
 
 # This allows a specific version of odoc to be selected if necessary
-ODOC="odoc>=1.4.2"
+ODOC="odoc>=1.5.0"
 
 TARGET="$1"; shift
 

doc/documentation.rst

@@ -96,6 +96,6 @@ See :ref:`dune-env` for more details on the ``(env ...)`` stanza.
 - ``(warnings <mode>)`` specifies how warnings should be handled.
   ``<mode>`` can be: ``fatal`` or ``nonfatal``.
   The default value is ``nonfatal``.
-  This field is available since Dune 2.2 and requires Odoc 1.4.3.
+  This field is available since Dune 2.4.0 and requires Odoc 1.5.0.
 
 .. _odoc: https://github.com/ocaml-doc/odoc

src/dune/dune_env.ml

@@ -153,7 +153,7 @@ module Stanza = struct
 
   let odoc_field =
     field "odoc" ~default:Odoc.empty
-      (Dune_lang.Syntax.since Stanza.syntax (2, 2) >>> Odoc.decode)
+      (Dune_lang.Syntax.since Stanza.syntax (2, 4) >>> Odoc.decode)
 
   let config =
     let+ flags = Ocaml_flags.Spec.decode

src/dune/stanza.ml

@@ -6,7 +6,7 @@ module Parser = struct
   type nonrec t = string * t list Dune_lang.Decoder.t
 end
 
-let latest_version = (2, 2)
+let latest_version = (2, 4)
 
 let syntax =
   Dune_lang.Syntax.create ~name:"dune" ~desc:"the dune language"

test/blackbox-tests/test-cases/odoc/warnings/dune-project

@@ -1 +1 @@
-(lang dune 2.2)
+(lang dune 2.4)