`@` is still yellow, even though it's no longer function declaration

[nayakrujul]

@ was changed from function declaration to vectorised length in 2.20.0, but it's still highlighted as function declaration because Vylight hasn't been changed. Instead, ¨@ should now be yellow, and @ shouldn't have highlighting.

[PlaceReporter99]

Add the outdated-highlighting and syntax-changes tags.