New features
[66a449a] Updated dependencies to Symfony 4.0.1 (@javiereguiluz)
[4769bb8] Added Doctrine's mapping validation on Travis (@phpeek)
Bug fixes
[180d6a6] Removed explicit dependency on DoctrineBundle (@phpeek)
[6740c8f] Sorted the contents of symfony.lock (@phpeek)
[25f82db] Updated French, Italian and Japanese translations (@flibustier)
[bb018a9] Updated Polish translation (@piotrgradzinski)