Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  c78ea300449a83327e3d6c13858134e128f09c5b

[bug 49952] Consolidate SerializationOptions.

Instead of having several special purpose subclasses of SerializationOptions,
have just one SerializationOptions class which can handle arbitrary options.

This way, it becomes possible to hand the options down the hierarchy of serializers,
so all serializers have access to shared options (which may include services).

Change-Id: I6096e0c07e6af392eafe5a9d74d1e17c9abadf12