Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  f6e163ff664171e01bf9beac253a56f1b3a437b2
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(bug 42688) terms search key schema update for sqlite

- adding a column with NOT NULL and existing data will fail
- note that sqlite also has the option of setting COLLATE NOCASE for the column and index,
but prefer to keep things consistent here with how we handle mysql.

Change-Id: I25bb707afaa73417ba6d2cc1f99f374cd682b590