ARIA 1.3 will deprecate `aria-level` on `role=listitem`, cf. https://github.com/w3c/aria/issues/1369 and https://github.com/w3c/aria/pull/1484. It would be helpful for the validator to warn authors.
ARIA 1.3 will deprecate
aria-levelonrole=listitem, cf. w3c/aria#1369 and w3c/aria#1484.It would be helpful for the validator to warn authors.