Add support for passing unadjusted tag names #12
Merged
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See:
https://html.spec.whatwg.org/multipage/parsing.html#tag-name-state
The HTML tokenizer consumes ASCII upper alpha as lower alpha
https://html.spec.whatwg.org/multipage/parsing.html#parsing-main-inforeign
SVG in HTML is therefore first lowercased, and afterwards has to
be adjusted
https://github.com/syntax-tree/hast#element
The hast spec already described the local name must be used on
elements
Closes GH-11.