Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  48aa79854cac7006d549e136ca61f3ae6fe02094

(bug 52387) Introduction of FetchedEntityContentSerializer

Moved the code for creating special serialization as required by the front-end (deserialized in
wb.serialization.FetchedContentUnserializer) in its own class. This is based on the current
serialization system which has some design issues.

The whole concept of how we get these informations to the front-end should be redesigned at some
point, for now this is a change for saving some code when requiring the same logic on special
pages where our front-end widgets requiring this information should be used. This also adds some
basic test to previously untested functionality.

Change-Id: I6d53bdda60297f79cec192d19f3ca1534e652284