Release Notes for 5.4.x

[Unreleased]

Added

Added Support for PhpRedis (#15160)
Added retry() helper (e3bd359, 52e9381)
Allow rolling back to a given transaction save-point (#15876)
Added Container::factory() method to the Container contract (#15430)
Added RedisStore::add() to store an item in the cache if the key doesn't exist (#15877)
Replaced Symfony's translator (#15563)
Added $values parameter to Builder::firstOrNew() (#15567)

Changed

Consider interfaces and extended classes in Gate::resolvePolicyCallback() (#15757)
Added LogServiceProvider to defer loading of logging code (#15451, 6550153, #15794)
Support wildcards in MessageBag::first() (#15217)
The Log facade now uses LoggerInterface instead of the log writer (#15855)
Cache::flush() now returns boolean (#15831, 057492d)