message: Docs: recommend npm version 3 or later in CONTRIBUTING.md
diff: @@ -28,7 +28,7 @@ The core team will be monitoring for pull requests. When we get one, we'll run s
  git checkout -b my_branch
  ```
  -2. Run `npm install`. It is recommended to use `npm3`.
  +2. Run `npm install`. We recommend that you use `npm` version 3 or later.
  ```sh
  npm install
  