Updated mediawiki/extensions
Project: mediawiki/extensions/Calendar  137bb50db951cb884691ae152a26ec796ca5bb52

Migrate to JSON i18n

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

Change-Id: I0ec151d912dc7d4c635cc816eb9d9189612ab15a