Updated mediawiki/extensions
Project: mediawiki/extensions/SignWritingMediaWikiPlugin  38a51413906c0b94bd3328f1bdbdb59499ea2237

Migrate to JSON i18n

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

Change-Id: Ie87ea5a19513386b3917efe268123ac9a3d824bb