onObjectAdded event not triggered
I'm trying to find a way to trigger an event after drawing an object.
I saw that there are **onObjectAdded** and also **onMouseUp** events being defined but **neither of these are working**.

`<SketchField onObjectAdded={this.onBoundingBox} />`

this also does not fire the event:

`<SketchField onMouseUp={this.onBoundingBox} />`

The content of `this.onBoundingBox` is just a console.log for now.
But this works with onChange.
I'm wondering if I did something wrong or if this is an issue? Do you have any examples of how to use the events?
