Add Safari versions for RTCTrackEventInit API (#11318)
Add Safari versions for RTCTrackEventInit API (#11318)

This PR adds real values for Safari (Desktop and iOS/iPadOS) for the `RTCTrackEventInit` API, based upon commit history and date.

Commit: https://trac.webkit.org/browser/webkit/tags/Safari-604.2.4/Source/WebCore/Modules/mediastream/RTCTrackEvent.idl
chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data