Needs updating for AutoHotkey v2

[earhax]

Various things like autocompletions, built-in constants, scopes, and other aspects of this syntax definition are not up to date for AutoHotkey v2.

https://www.autohotkey.com/docs/v2/v2-changes.htm

[bit-9]

It's been a couple years since this was posted, which I think warrants a bump -

I'm still interested in having this updated to accommodate AutoHotkey v2, please.