Update patchlevel

Author: repeatedly

setup.py

@@ -17,7 +17,7 @@
     kwargs["use_2to3"] = True
 
 setup(name='msgpack-rpc-python',
-      version='0.2.0',
+      version='0.2.1',
       author='Masahiro Nakagawa',
       author_email='repeatedly@gmail.com',
       url="https://github.com/msgpack/msgpack-rpc",