Updated version to 0.2.0

Author: syrusakbary

setup.py

@@ -31,7 +31,7 @@
 
 setup(
     name='graphql-ws',
-    version='0.1.1',
+    version='0.2.0',
     description="Websocket server for GraphQL subscriptions",
     long_description=readme + '\n\n' + history,
     author="Syrus Akbary",