Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  f9d06141f408f247422dcbcc16c3e6b07dc1b221

Make JSHint enforce ES3 compatibility

Also fix ES3 compatibility errors.
Upstreamed issue with sinon.stub().throws():
https://github.com/cjohansen/Sinon.JS/issues/488

Change-Id: I93b0d575484089b293d94ea860d245def4646cb4