Updated mediawiki/extensions
Project: mediawiki/extensions/Mantle  820ba5702aa5514cb65f4a1e4f63427ac73609d0

Remove concept of a default compiler

All templates using ResourceLoaderTemplateModule must now
declare their template extension.

Change-Id: Iab1c1a9025bd3e1e3d3a2bb5625adbdb6f7fddd2