[MMO] External Accounts 2.3.0

Refactoring

Support XF 2.3.0
Min require XF 2.3.0 Beta 3

Update twitch api
Update vk api
Minimum XF version 2.2.0

Update vk api
Add Apple service (thanks @Goodnightpanda)
Add Heroku
I also wanted to thank @Goodnightpanda for creating a test application for testing and developing a service for Apple. And thank him for testing the application.