v1.2.1

修复问题

• 修复 obd cluster upgrade 命令在没有设置中文环境时会出现解析升级路径编码错误的问题。
• 修复 obd cluster upgrade 命令在缺少 mysqlt.connector 依赖时的问题。
• 修复当部署中只有一个组件时，obd cluster upgarde 不能自动选择该组件进行升级的问题。

Bugfixes

• Fixed the upgrade path encoding error when you use the obd cluster upgrade command without setting the Chinese environment.
• Fixed the problem caused by no mysqlt.connector dependency when you use the obd cluster upgrade command.
• Fixed OBD cannot choose and upgrade the target component when you have only one component.