Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  a5e566e5db189312272a1d2301b6fbf71b759ac3

Add rejection logging to providers

Make sure it is easy to debug when one of the promises rejects (and
causes the whole promise chain to fail).

I'm not really happy with this, but still seemed better than adding
the same boilerplate error logging code to each provider one-by-one.

Change-Id: Idd2b638f012ef2ff250e350e2f6a60bb8b81899b
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/268