merlin.opam: add conf-jq test dependency
merlin.opam: add conf-jq test dependency

the-lambda-church/merlin,dra27/merlin,rgrinberg/merlin,the-lambda-church/merlin,dra27/merlin,rgrinberg/merlin,ocaml/merlin,ocaml/merlin,rgrinberg/merlin,ocaml/merlin,rgrinberg/merlin,the-lambda-church/merlin,dra27/merlin,ocaml/merlin,dra27/merlin