Updated mediawiki/extensions
Project: mediawiki/extensions/DiscussionThreading  37db06953d543f32b759f45b44198cce3099abf1

Migrate to JSON i18n

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

Change-Id: I0dd5bb094353ec6978bccce3cac923e3aef299dd