Thanks to our previous step, adding a new dependency is easy.
The OCaml compiler is package manager-agnostic. OPAM is the common one used by the community. Though if you're reading this tutorial, you likely know how to use npm. Good news: we support that as well. This tutorial will focus on the latter.
Usually we'd write a package.json here and let you do npm install to install all the dependencies into ./node_modules; for the sake of simplicity, we're gonna hardcode a dependency (check it out, it's only two files). You get the idea.
We'll also make the corresponding additions to .merlin.