Update package.json

Author: yunxing

package.json

@@ -42,6 +42,7 @@
   "dependencies": {
     "reason": "^ 1.3.2",
     "@opam-alpha/merlin": "^ 2.5.0",
+    "@opam-alpha/ocaml": "4.2.3",
     "nopam": "https://github.com/yunxing/nopam.git",
     "dependency-env": "https://github.com/npm-ml/dependency-env.git"
   },