Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  04630de46fb4b179a7f7c69a5f34b3fb72034f2f

Remove usage of dumpcate methods in ItemDiff.

This is needed by I0c130c000 in WikibaseDataModel, to 
avoid breakage.

Change-Id: I0539c43fe4e47fa7eecb3a86a80a6990dae42f27