Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  fc7413301fe77a39e26554c75106c454db476743

Hide (De)SerializerFactory on the app level.

Hiding the Factories and providing access only to the
Entity level (de)serializers allows us to easily configure
the format used for serializing entities.

Change-Id: I79874b52caecb80e4b3b226bc365e068d1d29a9b