minor #800 Update ORM requirements to allow DBAL 2.5 again (Tobion)

This PR was merged into the 2.3 branch.

Discussion
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Update ORM requirements to allow DBAL 2.5 again

@Ocramius could doctrine release ORM 2.4.8 so doctrine/orm@e05930e is tagged? I think orm <2.4.8 is incompatible with DBAL 2.5.

Commits
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f92af02 allow semantic twig extension versions
49b8620 orm 2.2 and 2.3 are end of life
2f523d8 Update ORM requirements to allow DBAL 2.5 again

Author: fabpot

composer.json

@@ -9,15 +9,14 @@
     "require": {
         "php": ">=5.3.3",
         "symfony/symfony": "2.3.*",
-        "doctrine/orm": "~2.2,>=2.2.3,<2.5",
-        "doctrine/dbal": "<2.5",
+        "doctrine/orm": "^2.4.8",
         "doctrine/doctrine-bundle": "~1.2",
-        "twig/extensions": "1.0.*",
+        "twig/extensions": "~1.0",
         "symfony/assetic-bundle": "~2.3",
         "symfony/swiftmailer-bundle": "~2.3",
         "symfony/monolog-bundle": "~2.4",
         "sensio/distribution-bundle": "~2.3",
-        "sensio/framework-extra-bundle": "~3.0,>=3.0.2",
+        "sensio/framework-extra-bundle": "^3.0.2",
         "sensio/generator-bundle": "~2.3",
         "incenteev/composer-parameter-handler": "~2.0"
     },