bump version

Author: boogheta

setup.py

@@ -5,7 +5,7 @@
 
 setup(
     name="twitwi",
-    version="0.20.0",
+    version="0.21.0",
     description="A collection of Twitter-related helper functions for python.",
     long_description=long_description,
     long_description_content_type="text/markdown",