expose parse5 option scriptingEnabled

[5saviahv]

Expose scriptingEnabled option. It would accept false value only, all other cases it should stay true.

<noscript><link rel="stylesheet" href="/css/noscript.css"></noscript>

It should help parse some documents where noscript elements are used.
If true (default) all html code inside noscript elements will treated as text,
if false all html code inside noscript elements will treated as html and parsed accordingly.

#1105

[fb55]

This looks great! Could you (1) add a simple test case and, optionally, (2) add this to the TS type def?

[fb55]

Thanks a lot!