Updated mediawiki/extensions
Project: mediawiki/extensions/PdfBook  05846e7c5ea7ca8a5bd768ad0e1926a47f90b9d2

Migrate to JSON i18n

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

Change-Id: Ic5a6387bf7d0770a1600fde327bffe41204d9aa1