Allow package to be used as a module

[christian-bromann]

Hey,

I would be interested to integrate appium-doctor into the WebdriverIO set-up wizard. For that I would love to make this tool consumable as a module so I can import and run it with arguments, e.g.:

import { check } from 'appium-doctor'

const result = await check(args)

Where result is an object with the results that allows one to print it somewhere or take own actions.

[KazuCocoa]

btw, this repo is going to be part of appium main repo as https://github.com/appium/appium/tree/master/packages/doctor in Appium 2.0

[christian-bromann]

Gotcha. Had a conversation in the Appium channel and we figured out a way forward. Cheers!