Add support for more HTML tags

[dominic998]

Currently, WhoColor will attempt to tokenise wikitext such as <gallery> and <center>, which can modify how a page looks quite a lot.

Would it be possible to support more of these tags? All the ones here should probably do it:
https://en.wikipedia.org/wiki/Help:HTML_in_wikitext#Parser_and_extension_tags

If possible, also include obsolete tags, because they are still sometimes used:
https://en.wikipedia.org/wiki/Help:HTML_in_wikitext#Obsolete/deprecated_elements