Peer dev dependencies

[yoshigev]

I love the feature of auto installation of peer dependencies, but I'm missing the option to only install them for dev environment.

From the configuration perspective, I think this can be easily done by extending the possible options on peerDependenciesMeta (thanks @orgads for the proposal), like:

{
  "name": "foo",
  "version": "1.2.3",
  "peerDependencies": {
    "my-dep": "^1.2"
  },
  "peerDependenciesMeta": {
    "my-dep": {
      "dev": true
    }
  }
}

The proposal is that in case "dev": true appears on peerDependenciesMeta, the dependency will be treated as dev-dependency of the external package.

Does it make sense?

Thanks,
Yehoshua