Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  87daa1c3311dde72f7d98dae5885f36725d37bbf

Claims now use wb.SnakList instead of wb.Snak[] for their qualifiers

Adjusted tests and solved some overdue TODO there along the way.

Change-Id: I2e2688c23c05bcf3bf1d61cd4b8f02675485dd3e