Mark newer transition events as unsupported on Safari still (#5732)
Mark newer transition events as unsupported on Safari still (#5732)

The three new transition events: transitionrun, transitionstart, transitioncancel

Tested on macOS Safari (13.0.3) on MacBook and on an iPad with iOS Safari (12) on the MDN demo page for the events (confirmed the demo worked fine on Chrome which supports the events)

(Updating to iPadOS 13.3.1 to re-check in an hour, just in case)
chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data