Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  dd66308c7c6db5c489dc2813262994a7bd0b4fc4

Rewrote SiteLink test to not depends on the database

Also decreases complexity, increased readability and maintainability

And got rid of deprecated method usage

Change-Id: Ifbd141dcc41640fd9348558efdc8d82a5423be82