当前使用Python的内置线程和socket，准备切换到协程

setup.py

diff --git a/setup.py b/setup.py
index 7ee80a7..8177f2a 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 
 setup(
     name='python-dubbo',
-    version='0.0.3-beta18',
+    version='0.0.3-beta19',
     url='https://github.com/RitterHou/python-dubbo',
     author='hourui',
     author_email='hourui@qianmi.com',