Merge pull request #348 from tmattio/filter-ci-tests

Run unit tests only on latest OCaml version

Author: rgrinberg

.github/workflows/build-and-test.yml

@@ -88,7 +88,9 @@ jobs:
         run: opam exec -- make fmt
 
       - name: Run OCaml tests
+        if: matrix.ocaml-version == '4.11.1'
         run: opam exec -- make test-ocaml
 
       - name: Run Node tests
+        if: matrix.ocaml-version == '4.11.1'
         run: opam exec -- make test-e2e