[ANN] Set up OCaml 2.0.0-beta

Hopefully, this will be the last release before stable 2.0.0. This release allows you to add multiple custom repositories, which enables testing with multicore and beta repository.

- name: Use Multicore OCaml
  uses: ocaml/setup-ocaml@v2
  with:
    ocaml-compiler: ocaml-variants.4.12.0+domains+effects
    opam-repositories: |
      multicore: https://github.com/ocaml-multicore/multicore-opam.git
      default: https://github.com/ocaml/opam-repository.git

6 Likes