Updated mediawiki/extensions
Project: mediawiki/extensions/Parsoid  ab999dda3f8f4bc2cae525dfe4a0315a194fbaa4

Disable selective serialization on oldid '0'

The VE sends us the string '0' currently for new pages. Don't try to use
selective serialization on those. This fixes new page creation in production.

Change-Id: I772635d098c8da3da59482c3a0fb183b74e89054