A promisify wrapper for PlayFab

The purpose is to make it easy to use async and await when working with the PlayFab SDK Both async/await and 'then().cacth()' can be used.

import {PlayFabAsync} from "playfab_async";

let res;
try {
    res = await PlayFabAsync.Client.LoginWithEmailAddress({
        Email: "[email protected]",
        Password: "some_password"
    });
} catch (e) {
    res = e;
}

import {PlayFabAsync} from "playfab_async";

const res = PlayFabAsync.Client.LoginWithEmailAddress({
    Email: "[email protected]",
    Password: "some_password"
}).then(e => e).catch(err => err);