Prepare for release 3.11.0

Author: Jay Patel

CHANGELOG.md

@@ -1,5 +1,8 @@
 ### CHANGELOG
 
+####Version 3.11.0 - Mar 7, 2017
+   - Updated stubs for 204 release.
+
 ####Version 3.10.0 - Mar 6, 2017
    - Add RiskSesionCorrelationId to `DoReferenceTransactionRequestDetailsType`.
 

lib/PayPal/Service/PayPalAPIInterfaceServiceService.php

@@ -123,8 +123,8 @@ class PayPalAPIInterfaceServiceService
     protected static $SDK_NAME = "merchant-php-sdk";
 
     // SDK Version
-    protected static $SDK_VERSION = "3.10.0";
-  
+    protected static $SDK_VERSION = "3.11.0";
+
     /**
      * @param $config - Dynamic config map. This takes the higher precedence if config file is also present.
      *