Deps: bump up dune to 3.18.2

[dannywillems]

The reviewer can reproduce it with:

opam install dune.3.18.2
opam switch export opam.export

The output of the first command must upgrade ONLY dune.

[dannywillems]

!ci-toolchain-me

[dannywillems]

!ci-toolchain-me

[dannywillems]

!ci-build-me

[glyh]

This is a big leap, did you check previously that all dependencies actual support dune 3.18? I think in particular js-of-ocaml has some restriction on dune

[dannywillems]

!ci-bypass-changelog

[dannywillems]

This is a big leap, did you check previously that all dependencies actual support dune 3.18? I think in particular js-of-ocaml has some restriction on dune

Yes. dune should not cause any issue while upgrading.

[dannywillems]

If someone wants to take over this patch, nix flake update should be run first, to get rid of the dune build issue in nix.