Bump upper bound for symfony/* from 2.2 to 2.3
merged branch igorw/sf-2.3 (PR #685)

This PR was squashed before being merged into the master branch (closes #685).

Discussion
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Bump upper bound for symfony/* from 2.2 to 2.3

Commits
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70eb564 Bump upper bound for symfony/* from 2.2 to 2.3