Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticMediaWiki  ab2e20532a7eda2defa19e6a0689900fc62b31c6

Switch SMW\SerializerInterface with ext-Serialization Serializer/Deserializer

Replace SerializationInterface with the ext-Serialization interface without
implementing any strategies. Re-factoring can be done at a later stage without
the need to change the public interface.

Change-Id: Iddf4ece627f086efe9ce3e68085b4a638e055f91