minor #2733 Set correct Symfony requirements (BackEndTea)
minor #2733 Set correct Symfony requirements (BackEndTea)

This PR was merged into the 2.0.x-dev branch.

Discussion
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Set correct Symfony requirements

Since 2.* dropped support for older symfony versions.

Commits
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d3c0e6bd Set correct Symfony requirements

OskarStark/EasyAdminBundle,javiereguiluz/EasyAdminBundle,OskarStark/EasyAdminBundle,OskarStark/EasyAdminBundle,javiereguiluz/EasyAdminBundle