v0.5.3

Changelog

• 2da949e: Version 0.5 introduced events including impress:stepenter, but this event was not triggered properly in some specific transition types (for example when only scale was changing between steps). It was caused by the fact that in such cases expected transitionend event was not triggered. Unfortunately modern transitionend event is no longer used to detect when the transition has finished, but old school (and more reliable) setTimeout is used.