Facade 'Icon' => Bootstrapper\Facades\Icon::class doesn't get glyphicon in Bootstrap 4

[diegoquirino]

I've noticed that glyphicon was dropped (see http://v4-alpha.getbootstrap.com/migration/) after updating my app to Bootstrap 4.

How can I change automatic generation of code to another library (like open-iconic). Today, the automatic generated code like:
<span class='glyphicon glyphicon-floppy-disk'></span>
And I need to change it to:
<span class='oi oi-floppy-disk'></span>