Adjusted composer files for consistency with PhpDocumentor.

Author: boenrobot

composer.json

@@ -6,13 +6,13 @@
         {"name": "Mike van Riel", "email": "[email protected]"}
     ],
     "require": {
-        "php": ">=5.3.2",
+        "php": ">=5.3.3",
         "dflydev/markdown": "1.0.*"
     },
     "autoload": {
         "psr-0": {"phpDocumentor": ["src/"]}
     },
     "require-dev": {
-        "phpunit/phpunit": "*@stable"
+        "phpunit/phpunit": "3.7.*@stable"
     }
 }