Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  377bf9e01000f7d8c7938d56f2b17481d018f6e8

(bug 44683) Implementing missing equals() and toJSON() methods

This change set implements some equals() and toJSON() methods for
wb.Reference, wb.Claim and wb.Statement not yet implemented but
required for implementing the setClaim API method.

- patch set 4: rebase
- patch set 6: Optimized QUnit tests

Change-Id: I0e1d341549e253bfb411bc61960bbd57ad569c84