bump version for pypi

setup.py

@@ -31,7 +31,7 @@ with open("README.md", "r") as fh:
 
 setup(
     name="DTLSSocket",
-    version='0.2.0',
+    version='0.2.1',
     description = "DTLSSocket is a cython wrapper for tinydtls with a Socket like interface",
     long_description=long_description,
     long_description_content_type="text/markdown",