Support ESLint 8.x

[MichaelDeBoey]

ESLint v8.0.0 is released 🎉

It would be awesome to have official ESLint 8 support. 👊
I'm happy to help where I can of course 🙂

[G-Rath]

Thanks, I've got a branch locally covering this but we need @typescript-eslint to support v8 before we'll be able to properly look at supporting.