Update to support the latest emojis that iOS now supports

[gaqzi]

There's now a whole slew of new emojis available to be used. Update the app to handle all of them. Including skin tone modifiers etc.

Not sure at all how to handle it outside of pure unicode, i.e. with the colon syntax, but lets get that figured out after we got all the code points in place.

[alfaro28]

+1