由温仰发起的CDN SDK自动发布, BUILD_ID=280, 版本号：0.5.6

Signed-off-by: haowei.yao <haowei.yao@alibaba-inc.com>

ChangeLog.txt

@@ -1,3 +1,7 @@
+2017-12-15 Version: 0.5.6
+1, Update SetReqAuthConfig.
+2, Add Scdn API.
+
 2017-12-15 Version: 0.5.5
 1, fix test cases