removed 3.0 constraints from 2.7 composer files

Author: fabpot

composer.json

@@ -17,19 +17,19 @@
     ],
     "require": {
         "php": ">=5.3.9",
-        "symfony/event-dispatcher": "~2.1|~3.0.0",
-        "symfony/intl": "~2.3|~3.0.0",
+        "symfony/event-dispatcher": "~2.1",
+        "symfony/intl": "~2.3",
         "symfony/options-resolver": "~2.6",
-        "symfony/property-access": "~2.3|~3.0.0"
+        "symfony/property-access": "~2.3"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "~2.7|~3.0.0",
+        "symfony/phpunit-bridge": "~2.7",
         "doctrine/collections": "~1.0",
-        "symfony/validator": "~2.6|~3.0.0",
-        "symfony/http-foundation": "~2.2|~3.0.0",
-        "symfony/http-kernel": "~2.4|~3.0.0",
-        "symfony/security-csrf": "~2.4|~3.0.0",
-        "symfony/translation": "~2.0,>=2.0.5|~3.0.0"
+        "symfony/validator": "~2.6",
+        "symfony/http-foundation": "~2.2",
+        "symfony/http-kernel": "~2.4",
+        "symfony/security-csrf": "~2.4",
+        "symfony/translation": "~2.0,>=2.0.5"
     },
     "conflict": {
         "symfony/doctrine-bridge": "<2.7",