Updated mediawiki/extensions
Project: mediawiki/extensions/AddThis  509523066bf347d4324714c2d0604207cb278c95

Migrate to JSON i18n

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

Change-Id: I14d02d7d40d03f10a5de8d93c3636c31bbed565b