Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  cb73ba9b9b754b213e3419fa6b1bc468ec4b390d

(bug 49583) refactoring term validation

Use ValueValidator and EntityValidator to validate terms and
enforce constraints on edit. Introduces TermValidatorFactory
for defining validators based on the entity type.

Change-Id: I3778f7b4d9a212e7c6a83b3b156da8c1b64ccdf0