Override sauce api host

You can now override the saucelabs api host by using env var SAUCE_API_HOST. Default is saucelabs.com. This allows it to set it to app.saucelabs.com.

Added Retry to saucelabs

Added retry to saucelabs to retry up to three times before it fails.

Proxy Support

v3.1.0

Update package.json

Update for mobile web browsers on Android 6+

This release contains an update from @chiahrens to fix our support for Saucelabs mobile web browsers on Android 6 and above.