* Fix HTML parsing for non-closed elements like <link>
The XML parser we use requires all tags to be closed by default,
and if they aren't (like HTML5 <link> elements), it simply gives up
on further parsing. This change makes it ignore such issues.
Also uncover a bug with the current parser (it simply won't parse
elements like `<script defer src="..."></script>`) -- e.g. elements
with no attribute values.
The XML parser is an XML parser and will have to be replaced with
HTML aware parser in the future.
* Add check for empty elements
* Update extract.rs
Co-authored-by: Matthias <matthias-endler@gmx.net>
