Types for Events are missing #12
Description
First of all, thanks for this really helpful small library, was about to build something similar for a project when I discovered this. Was able to integrate this with react-leaflet and turfjs' Bézier curves (currently haven't been able to get the extension markers on the bezier line though - if that event is possible).
When registering the event listeners on the draggable object, I noticed that this library does not inject type definitions for the added event types. Would be nice if those types were shipped with the lib.