Updated mediawiki/extensions
Project: mediawiki/extensions/Parsoid  7f9333e595f69903d4e8d5643ca43cf1ebc49619

Catch exceptions in serializeChildren

There are some stack traces in the rt testing logs that have their root in
serializeChildren. Handle that error so that we know which page those happen
on.

Change-Id: I088385569243fc72bae2b9ab70fd3a1065c7752f