Increment version to 2.0.0a1

Author: sinall

setup.py

@@ -40,7 +40,7 @@ def main():
     setup(
         name='strategyease_sdk',
 
-        version='1.5.1',
+        version='2.0.0a1',
 
         description=u'策略易（StrategyEase）Python SDK，策略自动化交易 API。',
         long_description=long_description,