Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  11170dccd521648792368a4c187270348f83f520
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Removing alienblock tag

One of our demos literally used an <alienblock> tag to trigger alienBlock behavior. Since this is not registered in ve.js blockTypes array, I'm just switching it to a <div> for the demo.

Change-Id: I68bff80fcbdd794eeae94dff43f7ef82f972cdb5