Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  5394ce00b03386633d0819d83636b8a45f383cf2

Implement merge api module

This takes 2 unique item ids and merges the items

Bug: 53024

Change-Id: I2a75050bdb3ebd7b97fbd6f236d59464479fa7d8