Updated mediawiki/extensions
Project: mediawiki/extensions/DataValues  50be0d4037c11dea08c5138949017b7f5b9d1429

Implemented MessageProvider for valueView experts

The MessageProvider returns specified default messages or mediaWiki messages
if the mediaWiki JS object is available. This allows getting rid of hard-coded
mediaWiki dependencies in most valueView experts.

Change-Id: I1100fa38ea3724dca6b8559e8fbadac67a67a1b7