setup-ocaml 3.0.13

Author: cknitt

.github/workflows/ci.yml

@@ -41,11 +41,10 @@ jobs:
           node-version: 16
 
       - name: Use OCaml 4.14.1
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3.0.13
         with:
           ocaml-compiler: 4.14.1
           opam-pin: false
-          opam-depext: false
 
       - name: OPAM install
         run: opam install . --deps-only --with-test