[Typing-sig] Re: PEP 698 typing.override

PEP 698 is accepted! See https://discuss.python.org/t/pep-698-a-typing-override-decorator/20839/11. Work still to be done: - I need to update the typing module in CPython and then typeshed, I'll report back here when that is finished - Once those changes land we'll want to re-export typing.override from typing_extensions in newer version of Python - I'll extend Pyre's support for `@override` to allow `typing.override`, we'll want to do the same for other type checkers Thanks to all of you for their feedback and support with this proposal! Cheers, Steven