Review v3 API

[scottgonzalez]

BrowserStack has a tendency to add new features to their API without changing versions. A quick glance at the create worker API shows that they've added project, name, and build fields. The full API should be reviewed and compared to what's currently supported/documented in node-browserstack. It's possible that the only updates necessary will be documentation changes.

[scottgonzalez]

In case someone else is interested in working on this, but unaware of where the official API docs are located: https://github.com/browserstack/api