Minor documentation fix

[plasticine]

What it says on the tin. 😎

[rotemmiz]

The current docs are correct, we don't use callbacks to notify mocha we're done, we use async-await instead.

[plasticine]

@rotemmiz Hey there, hrm — perhaps I should have posted a more useful PR description after all!

I’m aware of the nature of the done callback and async/await with Mocha, however the issue, if you look at the diff again, is that you’ve mixed the usage;

describe('Background push notification', () => {
  beforeEach(async () => {
    await device.relaunchApp({userNotification: userNotificationPushTrigger}, done) // <-- !?
  });
});

[rotemmiz]

Ho my, I totally misread the diff. Sorry for that

[plasticine]

@rotemmiz Don’t mention it! Thanks for your work on Detox — it’s fantastic, and really exciting.