Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  153c35bca4f33b90aeaea1101075b33616fa19e6

Implement List Serializer and Unserializer

Needed to allow claims references and qualifiers
to be optionally serialized by property or just
in a list!

Change-Id: I07626d07670f6cd6a2ae3d7370dea6ba32c5c366