Add Safari versions for Document API (#12081)
Add Safari versions for Document API (#12081)

This PR adds real values for Safari (Desktop and iOS/iPadOS) for the `Document` API, based upon manual testing.

Test Code Used: `document.webkitFullscreenElement`
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data