Bumped! 🏷

Diff: https://github.com/nettrine/dbal/compare/v0.2.7...v0.3

Changes:

• require doctrine/dbal ~2.9.2
• added unix_socket to configuration (thanks @kubarta)
• ContainerAwareEventManager: support subscribers as anonymous services (thanks @jiripudil)
• use phpstan 0.11, phpunit 8