update with full list html5 self closing tags

[Cojad]

html5 spec has a list of void elements (aka self closing tags)
https://www.w3.org/TR/html5/syntax.html#void-elements

[coveralls]

Coverage remained the same at 94.622% when pulling e1a61e4 on Cojad:master into 9663472 on paquettg:master.

[coveralls]

Coverage remained the same at 94.622% when pulling e1a61e4 on Cojad:master into 9663472 on paquettg:master.

[Cojad]

There maybe still some other self-closing tag in foreign elements. But this should avoid most common self closing tag. But I think it's better close the tag if tags actually does self closing with slash at the end. I was having trouble while extracting audio tag. I know this might not be standard way to use audio tag. But I think when an tag indicated it is self closed, we should close it.
ex: <audio src="test.way" />