CHANGES:

- Ignore stderr output when trying to find out the number of jobs
  available (ocaml/dune#1118, fix ocaml/dune#1116, @diml)

- Fix error message when the source directory of `copy_files` does not exist.
  (ocaml/dune#1120, fix ocaml/dune#1099, @emillon)

- Highlight error locations in error messages (ocaml/dune#1121, @emillon)

- Display actual stanza when package is ambiguous (ocaml/dune#1126, fix ocaml/dune#1123, @emillon)

- Add `dune unstable-fmt` to format `dune` files. The interface and syntax are
  still subject to change, so use with caution. (ocaml/dune#1130, fix ocaml/dune#940, @emillon)

- Improve error message for `dune utop` without a library name (ocaml/dune#1154, fix
  ocaml/dune#1149, @emillon)

- Fix parsing `ocamllex` stanza in jbuild files (ocaml/dune#1150, @rgrinberg)

- Highlight multi-line errors (ocaml/dune#1131, @anuragsoni)

- Do no try to generate shared libraries when this is not supported by
  the OS (ocaml/dune#1165, fix ocaml/dune#1051, @diml)

- Fix `Flags.write_{sexp,lines}` in configurator by avoiding the use of
  `Stdune.Path` (ocaml/dune#1175, fix ocaml/dune#1161, @rgrinberg)

- Add support for `findlib.dynload`: when linking an executable using
  `findlib.dynload`, automatically record linked in libraries and
  findlib predicates (ocaml/dune#1172, @bobot)

- Add support for promoting a selected list of files (ocaml/dune#1192, @diml)

- Add an emacs mode providing helpers to promote correction files
  (ocaml/dune#1192, @diml)

- Improve message suggesting to remove parentheses (ocaml/dune#1196, fix ocaml/dune#1173, @emillon)

- Add `(wrapped (transition "..message.."))` as an option that will generate
  wrapped modules but keep unwrapped modules with a deprecation message to
  preserve compatibility. (ocaml/dune#1188, fix ocaml/dune#985, @rgrinberg)

- Fix the flags passed to the ppx rewriter when using `staged_pps` (ocaml/dune#1218, @diml)

- Add `(env var)` to add a dependency to an environment variable.
  (ocaml/dune#1186, @emillon)

- Add a simple version of a polling mode: `dune build -w` keeps
  running and restarts the build when something change on the
  filesystem (ocaml/dune#1140, @kodek16)

- Cleanup the way we detect the library search path. We no longer call
  `opam config var lib` in the default build context (ocaml/dune#1226, @diml)

- Make test stanzas honor the -p flag. (ocaml/dune#1236, fix ocaml/dune#1231, @emillon)

- Test stanzas take an optional (action) field to customize how they run (ocaml/dune#1248,
  ocaml/dune#1195, @emillon)

- Add support for private modules via the `private_modules` field (ocaml/dune#1241, fix
  ocaml/dune#427, @rgrinberg)

- Add support for passing arguments to the OCaml compiler via a
  response file when the list of arguments is too long (ocaml/dune#1256, @diml)

- Do not print diffs by default when running inside dune (ocaml/dune#1260, @diml)

- Interpret `$ dune build dir` as building the default alias in `dir`. (ocaml/dune#1259,
  @rgrinberg)

- Make the `dynlink` library available without findlib installed (ocaml/dune#1270, fix
  ocaml/dune#1264, @rgrinberg)