Promises instead of Callbacks.

[joshuapinter]

Instead of having to do:

getContacts( contacts => { 
  // Do something with contacts.
}

You can now do:

contacts = await getContacts();
// Do something with contacts.

So much cleaner.

And to be clear, we will not be supporting callbacks alongside Promises. We will be removing the typical callbacks in favour of Promises. They are the present and the future.