Porting the OCaml test runner v2 to OCaml

I have sent a PR porting the OCaml test runner version 2 (currently written in Python) to an OCaml version. It was auto-closed as usual, but it’s here

Port to ocaml by tautologico · Pull Request #39 · exercism/ocaml-test-runner (github.com)

Nice. Thanks! I’ve reopened it. @ErikSchierboom will take a look when he gets chance :)