Installing with Yarn is awkward

[IslandUsurper]

In package.json:

"engines": {
    "node": "^4.1.0"
  }

This is equivalent to "node": ">=4.1.0 && <5.0.0". Most users, and I imagine even most Kibo tenants, aren't using Node 4.x any more. For npm, this doesn't matter much because the engines declaration is only a suggestion. However, yarn has a strict engines check by default. In order to install mozu-node-sdk, you have to pass --ignore-engines to the install command.

It would be better to have an accurate engines specification, possibly "node": ">=4.1.0".