Updated mediawiki/extensions
Project: mediawiki/extensions/Parsoid  dea12a60b3bba2c708b3ceff679f559de08e9cca
null
Properly set up serializer callbacks in API roundtrip diff

The API rt diff helper did not pass the proper callbacks before, which caused
_rt with selser enabled to bomb out. With this patch, _rt works both with and
without selser enabled.

Change-Id: Ibee6ee5a9489dc907dba2a96a83f639d0cb613c0