Merge pull request #28 from wormling/log4php-version

Updated composer.json to allow newer versions of log4php.

Author: marcelog

composer.json

@@ -20,6 +20,6 @@
   },
   "require": {
     "php": ">=5.3.3",
-    "apache/log4php": "2.1.0"
+    "apache/log4php": "2.3.0"
   }
 }