Update setup.py

Author: jaehyukchoi

setup.py

@@ -5,7 +5,7 @@
 
 setup(
     name="pyfeng",
-    version="0.1.9",
+    version="0.2.0",
     description="Python Financial Engineering",
     long_description=long_description,
     long_description_content_type="text/markdown",