install with dev setup

Author: anmonteiro

.github/workflows/main.yml

@@ -37,7 +37,7 @@ jobs:
           opam-repositories: |
             default: https://github.com/ocaml/opam-repository.git
 
-      - run: opam install . --deps-only --with-test
+      - run: opam install . --deps-only --with-test --with-dev-setup
 
       - run: opam exec -- dune build