update release version

Author: danh91

setup.py

@@ -4,7 +4,7 @@
     long_description = fh.read()
 
 setup(name='purplship',
-      version='1.0-rc8',
+      version='1.0-rc9',
       description='Multi-carrier shipping API integration with python',
       long_description=long_description,
       long_description_content_type="text/markdown",