Updated mediawiki/extensions
Project: mediawiki/extensions/Math  b029a4037e8f8ed2ec0ce2d2b3ed6cf3ccb13bb3
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JSHint: ignore modules/MathJax

modules/MathJax is a third party library, we do not want to report
JSHint errors for it. Any errors there should be committed upstream.

Change-Id: I48a73eacb635149141e554853bf4aef65ecdcd49