Updated mediawiki/extensions
Project: mediawiki/extensions/BookManager  b5c1495dd0349e795aa97620a0d3eb4a9f546bc8

Migrate to JSON i18n

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

Change-Id: Idd30869cc7819df8430b04eb0d64561c5ee8d209