Add Safari versions for api.KeyboardEvent.keyIdentifier (#13787)
Add Safari versions for api.KeyboardEvent.keyIdentifier (#13787)

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

Commit: https://github.com/WebKit/WebKit/commit/27e30f576b5e09574c28ef8c04c3ea2de4442a37
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data