Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  7645915b31a0d7088fbc5b550774fb805b322c0d

Upgrade to WikibaseDataModel 2.0 and add a missing use clauses

See https://github.com/wmde/WikibaseDataModel/pull/218 for a few more
explanations.

Change-Id: I687c61c418d3a0a52b945356c5eb5ce60b3d994f
Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  352988df1e08d4f3cb31a509d283e4326aa3da61

Hygiene: Ensure property is set before accessing

Change-Id: I1f885a195139311d695ef20f0cb572a7f6c40bed