Parsing doesn't error on certain invalid xml.

[emorris00]

There are 2 scenarios I have found where the parser does not throw an error even though the xml is invalid.

1. root level elements without a close tag that aren't marked as a noChildNodes element

   parse("<a><b></b>")
   // returns
   // [
   //   {
   //     tagName: 'a',
   //     attributes: {},
   //     children: [ { tagName: 'b', attributes: {}, children: [] } ]
   //   }
   // ]

2. root level orphaned close tags (stops parsing after the first one encountered)

   
   parse("</a><b></b>")
   // returns
   // []

parse("") // returns // [ { tagName: 'a', attributes: {}, children: [] } ]

Technically there is a third where it doesn't error if there is more than one root element ex. `<a></a><a></a>` but I am assuming that is intended behavior so it can parse xml fragments. Maybe there should be an option to toggle whether to parse as a fragment or not? Either way this one isn't a big deal because it is very easy to check after parsing if there are multiple root elements.

[TobiasNickel]

yes, I know, this is on purpose. This library skip some checks. just to be faster. if you need a more standard compliant parser, I recommend parse5.