3.7.0

Added

• Add missing types by @lptn in #961

Changed

• Backport some v4 features by @lptn in #965

Fixed

• Fix PHPDoc: mark optional properties as nullables by @lptn in #963
• Fix one-to-many relations by @lptn in #964
• Fix type issue parsing "entities" by @lptn in #967

Removed

• Drop PHP 7.2 support and update phpunit by @lptn in #966