Add Safari versions for Attr API (#8515)
Add Safari versions for Attr API (#8515)

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

Test Code Used: `var el = document.createElement('p'); el.setAttribute('data-foo', 'bar'); var attr = el.getAttributeNode('data-foo');`
mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data