Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  3320ffcf15da92c57381fa24370abcc69c05f699

Hygiene: Add tests for the Pager

Prior to refactoring the pager, add some tests to assert its
current state.

Change-Id: I7b7edaf6d1cc5c9f068e07ce3e36988eb106f580