add debug log of sending and receiving command3
@ -2,6 +2,7 @@
* VERSION: 1.4.0
* FEATURE: support "rump" type to syncing data when `sync` and `psync`
commands are not supported.
* IMPROVE: add commands sending and receiving debug log.
2019-04-13 Alibaba Cloud.
* VERSION: 1.2.3
* IMPROVE: polish log print to print more error info.