Switch to the latest version of the html5lib test suite

[inikulin]

Apply latest spec changes by the way.

[inikulin]

Sources: https://chromium.googlesource.com/chromium/blink/+/master/LayoutTests/html5lib/resources/

[domenic]

It would be better to sync with the official html5lib repo, as in some cases Blink might not be fully compliant. @gsnedders is currently looking in to Blink divergences.

[inikulin]

Yep, I'm already doing it.

[inikulin]

Note: sync Blink changes as well-html5lib/html5lib-tests#67

[gsnedders]

Note some of the Blink changes are wrong per spec, and aren't gonna get merged. I'd stick with what's on master.

[inikulin]

@gsnedders Thank you for the clarification.