DEPS.md

• symfony/http-foundation >=2.4 for request_stack service
  Implicitly provided by symfony/symfony >=2.4.

• symfony/console >= 2.5 for QuestionHelper
  Implicitly provided by symfony/symfony >=2.5.

• symfony/security-acl ^2.4 || ^3 for security.acl.provider et al.
  Implicitly provided by symfony/symfony ^2.4, but no longer implicitly provided by symfony/symfony >= 3.

• symfony/form ^2.4 || ^3
  Implicitly provided by symfony/symfony >= 2.4
  Incompatible with symfony/form >= 4 (must remove choices_as_values and form aliases)