Updated mediawiki/extensions
Project: mediawiki/extensions/Parsoid  dbd0fbf3a252ce171a63e6ebe4466f4920a430af
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Add a default JSON file for WikiConfig to use

This should make one-off parsing and parserTests a lot simpler, and maybe
faster.

Change-Id: Ifead908726fafe32b2f71b4fcea89f242da57a42