How can I combine ember-bootstrap and ember-autoresize?

I would like to add the attribute autoresize=true to a textarea that is drawn using ember-bootstrap in order to use ember-autoresize.

As you can see here, this attribute is not bound, so I cannot simply add it to my template.

I've tried to manipulate the yielded control like so:

But this only works for classNames, not attributes.

What is the simplest way of achieving what I'm trying to do?