Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  fc3ea799dfd99166600ad63f974192e491a42867

Check values property exists before removing attribute

Apparently the values property is optional so an
exception is thrown if it isn't set.

Bug: 58421
Change-Id: Ied2a1adb2818fb3f516c1cbde263a675ceb84446