Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  5a3d56f81b389f1dc01c6aa51ea97f3e86c61947

Merge MultiLightbox into LightboxInterface

Change-Id: I4363095e0504dd941793ba3addc7ee3cbe835536
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/178