Merge pull request datastax#1061 from timgates42/bugfix/typo_version

Fix simple typo: versioni -> version

Author: aboudreault

cassandra/__init__.py

@@ -181,7 +181,7 @@ class ProtocolVersion(object):
 
     MAX_SUPPORTED = max(SUPPORTED_VERSIONS)
     """
-    Maximum protocol versioni supported by this driver.
+    Maximum protocol version supported by this driver.
     """
 
     @classmethod