Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  d9413f5fd049e800e0fc93f8ec0d1ef232bbb378

ApiWikibase: make fields private.

This should make it easier to refactor ApiWikibase,
in order to address bug 69001.

Change-Id: I298ddcc33b9ef1e062ce30da72e613f1b98bac38