Update README.md

Author: pmill

README.md

@@ -105,6 +105,12 @@ Unversioned (13 Apr 2013)
 
 *   Added GetSubscription functionality (thanks [Glenn Hermans](https://github.com/ghermans))
 
+0.5.5 (15/08/2016)
+
+*   Added GetTraffic functionality (thanks [texh](https://github.com/texh))
+*   Added ListDNS functionality (thanks [carlswart](https://github.com/carlswart))
+
+
 Copyright and License
 ---------------------