Updated mediawiki/extensions
Project: mediawiki/extensions/TimezoneSelector  ac7a710b2d9b6be132109f241fb523554d392cd3

Migrate to JSON i18n

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

Change-Id: Iad35a5e051faf388703d6d57e8729a524cedaa12