Tab "tabShow" event no longer firing

I had some custom javascript that was binding to the "tabShow" event.  

$('#mainTab').on('tabshow', function(e) {            
    if (e.target.id === 'tab1') {
    //... do stuff
    }
});

Recently, skuid was upgraded to the newest version and this functionality appears to have stopped working.  

Is there a new way to register to this event?