Merge upstream

It is prone to crashing, adds error logs and sets date to false in that case.

Sometimes people insert incorrect charset into their html.
This patch adds optional dependency on https://github.com/mooz/node-icu-charset-detector
to solve this.

When detecting charset of passed html we asses given buffer,
and if confidence that detected charset is correct is higher than 80%
or if detected charset equals to declared mime content-type we return
it instead of passing content-type declared in html meta attribute

…ndris9-master

…ndris9-master

…ndris9-master

merge upstream