update version

Author: gusibi

setup.py

@@ -10,7 +10,7 @@
     requirements = [l for l in f.read().splitlines() if l]
 
 setup(name="python-weixin",
-      version="0.4.7",
+      version="0.5.0",
       description="Python Weixin API client support wechat-app",
       long_description=long_description,
       long_description_content_type="text/markdown",