:npm-deps dependencies are implicit
Currently the Node dependencies for `:npm-deps` to work are implicit. Looking `cljs/module_deps.js` it's clear that at least `module-deps`, `resolve`, and `browserResolve` must exist. This should probably be handled transparently for the user.
Even after manually installing all the necessary deps if I try to run just the `test-npm-deps` test by itself on master I get the following stacktrace from Node.js:
On my local machine at least I had to install these manually. I think this should probably be handled for the user?