Rule Proposal: Lint deprecated tags

[leipert]

Some HTML tags are deprecated, for example <strike>. It would be great to be able to provide a blacklist of tags that could lead to linting errors. I could also look into this, if it is generally agreed that this would be a useful addition.

[armano2]

List of deprecated tags in html5: https://html.spec.whatwg.org/#non-conforming-features