Types are missing shorthands

[jansauer]

The editor exports a hand full of shorthands as part of it's external API methods. These shorthands are missing in the type definitions. This leads to an unnecessarily higher barrier of entry.

For example, in the documentation, saving data is multiple times describe with editor.save(). This leads to a type error in typescript since without the shorthand it would need to be editor.saver.save().