Update warning message on installation of msgpack-python (#172)

See also 0a422fe

Author: starrify

scrapinghub/hubstorage/client.py

@@ -90,7 +90,7 @@ def __init__(self, auth=None, endpoint=None, connection_timeout=None,
         self.use_msgpack = MSGPACK_AVAILABLE and use_msgpack
         if use_msgpack != self.use_msgpack:
             logger.warning('Messagepack is not available, please ensure that '
-                           'msgpack-python library is properly installed.')
+                           'msgpack library is properly installed.')
 
     def request(self, is_idempotent=False, **kwargs):
         """