Merge pull request #64 from GawainLynch/symfony-3

Optionally allow Symfony 3

Author: stecman

composer.json

@@ -10,7 +10,7 @@
     ],
     "require": {
         "php": ">=5.3.2",
-        "symfony/console": "~2.3"
+        "symfony/console": "~2.3 || ~3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.4"