release 5.1.6.3

Author: dt3310321

Diff for: setup.py

@@ -16,7 +16,7 @@ def long_description():
 
 setup(
     name='cos-python-sdk-v5',
-    version='1.6.2',
+    version='1.6.3',
     url='https://www.qcloud.com/',
     license='MIT',
     author='tiedu, lewzylu, channingliu',