Add Resizable elements

I think it will be very useful to add Resizable class on this library in complement of others events.

The resize CSS property is'nt supported on IE or Edge: Can I use link.

And this property is not very sexy cause we must resize only by the right-bottom corner of an element.

It's similar to JqueryUI https://jqueryui.com/resizable/ or interact.js http://interactjs.io/

Thanks