After latest unigram update and adding In-App emojis keyboard I decided to make a new simple app to add support for latest emojis.
Using this app you can get the latest emojis of Windows 10 October update on your phone. This app is working on any Windows 10 Mobile OS version.
After installing this app only launch it and when you see Done message you can close and uninstall the app.
After completing the procedure do a reboot and you've done. You can see new emojis in your apps like Unigram. Keep in mind some apps like Official Telegram messenger or some others still can't show the new emojis because I think they are using their own emojis pack.
This app doesn't need interop unlock on Lumia x20,x30 and x40 series. But you need interop unlock on Lumia X50 series.