Removed trailing comma

Author: Avaq

composer.json

@@ -21,7 +21,7 @@
     "forall/core": "*",
     "forall/wrap": "*",
     "forall/events": "*",
-    "monolog/monolog": ">=1.5.0",
+    "monolog/monolog": ">=1.5.0"
   }
 
 }