Merge pull request #201 from mtr/patch-1

Updated __version__ to match the release.

Author: maxkahan

src/vonage/__init__.py

@@ -31,7 +31,7 @@
     JSONDecodeError = ValueError
 
 
-__version__ = "2.4.0"
+__version__ = "2.5.5"
 
 logger = logging.getLogger("nexmo")