[new release] checkseum (0.4.0)
[new release] checkseum (0.4.0)

CHANGES:

- Support LLVM/clang with `__STDDEF_H` (@jonahbeckford, mirage/checkseum#71)
- Fix docstring reference (@reynir, mirage/checkseum#72)
- Add `{of,to}_int32` (@reynir, mirage/checkseum#73, @dinosaure, mirage/checkseum#74)

Leonidas-from-XIV/opam-repository,pirbo/opam-repository,codinuum/opam-repository,nberth/opam-repository,Leonidas-from-XIV/opam-repository,pirbo/opam-repository,nberth/opam-repository,ocaml/opam-repository,pqwy/opam-repository,fpottier/opam-repository,codinuum/opam-repository,fpottier/opam-repository,pqwy/opam-repository,ocaml/opam-repository