Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  393116e67c77460e4575eb9bcfd51a0e3c0ad959

Remove WikibaseEntityInsertionUpdate hook

WikibaseEntityModificationUpdate was never executed. Instead, every edit
triggered WikibaseEntityInsertionUpdate. Now, WikibaseEntityModificationUpdate
is triggered for every edit.

The old content passed to new ItemModificationUpdate objects was always null
since getSecondaryDataUpdates right now never gets passed an old content.

Change-Id: I7ad18d3e2b536480d0b23c5f48f1a3e9b028c4f8