[ANN] Set up OCaml 2.0.0-beta5

Ecosystem
1

Changed

  • Reduce GitHub API calls to avoid issues that can easily hit rate-limiting.

Fixed

  • If no user-input version is found in the opam-repository, explicitly raise an error instead of implicitly breaking the workflow.
  • Retrieve the base compiler version from opam-repository to use the live released compiler version.
2

In fact, it has supported the more complex semver range specification for some time. Also, even if you use range specification, the cache still works well!