Updated mediawiki/extensions
Project: mediawiki/extensions/WebChat  1d91d404b85e9309092c281e0b1f748cee58fe03

Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: Ie596eedefa5757a4cccffb1b4380d2f063bf99fd