Updated mediawiki/extensions
Project: mediawiki/extensions/Echo  dc5f772bac81108b7115dbf3dcf5f79e4e648762

Replace EchoBackend with mappers and gateway

* Get rid of EchoBackend by separating responsibilities into smaller objects

* Move main fetchNotification logic from API to a more appropriate place

* Add more unit testing coverage

Change-Id: I42f4d7566543332588431c21c220c0d64d026b70