feat: release v0.2.0, subscribe specific topics

* 支持订阅指定的 Topic

Author: chzealot

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name='dingtalk-stream',
-    version='0.1.13',
+    version='0.2.0',
     description='A Python library for sending messages to DingTalk chatbot',
     long_description=open('README.md').read(),
     long_description_content_type='text/markdown',