Animation?

On the demo page (https://cooltimeline.com/timeline-widget-demo/) you can see those nice animations when scrolling. I inspected the HTML code and there are custom attributes for AOS (Animate on Scroll https://michalsnik.github.io/aos/)

So how do I get those animations in there? My version of the Elementor Plugin does not add those. Is there a Pro version of the plugin? Is the plugin on the demo page an edited version? Is there a way to inject data attributes into the code generated by the plugin?