Updated mediawiki/extensions
Project: mediawiki/extensions/DonationInterface  e21924edf96914ae95cacd4cd90865125fbe94c6

(FR #856) remove last reference to gateway_forms/css/gateway.css

This may have been the source of an array_map error from resourceloader.

Change-Id: I10548b70b60fddfdc348f346b2c95a37af7cbde5