Updated mediawiki/extensions
Project: mediawiki/extensions/UniversalLanguageSelector  7c28df512556bf523811107447bfd8afcaa8e421

Add ext.uls.messages as dependency for ext.uls.mediawiki

Turns out the messages for language selector were not loading
in Special:MainPage. This fixes that as well as cleaning up the
dependencies.

Change-Id: Ice8dcf1b2e878a0fe3cd0e002a9b1cff2f1901dd