Merge pull request #55 from pitpit/bugfix-54

symfony/process version fixed to 2.4.*

Author: Alexandre Salomé

composer.json

@@ -23,7 +23,7 @@
     },
 
     "require": {
-        "symfony/process": "<3"
+        "symfony/process": "~2.4"
     },
     "require-dev": {
         "psr/log": "~1"