Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  a1bd1db241d0bdbec1efd06fefd67f90c4081e61

Use .static.isMeta to communicate meta-ness

This gets rid of the meta-specific hack in ve.dm.Document

Later on, I want to use this to get rid of meta-specific hacks in the
converter too, by pushing some of that logic into the ModelFactory.

Change-Id: I1dbee1654fa32d9c7cd521ec325b2553cde219d1