Updated mediawiki/extensions
Project: mediawiki/extensions/Mpdf  a244959fafc9dad9c1d245b22b0ef1e2035e5772

update mPDF to 5.7.2 (v 0.4.2)

* use hook MediaWikiPerformAction instead of UnknownAction

Change-Id: Ia98d7949b36eb94a8632722280a9551ce5bf99ec