Function mergeObj

mergeObj(oldObj, newObj, keys): {
[x: string]: any;
}
@description: 深度合并对象(当前用于合并系统配置文件 app-data.json) 已存在的属性默认不覆盖 @author: wuxh @Date: 2020-05-06 12:15:30
Parameters
- oldObj: {
  [x: string]: any;
  }
  - [x: string]: any
- newObj: {
  [x: string]: any;
  }
  - [x: string]: any
- keys: string | string[]
Returns {
[x: string]: any;
}
- [x: string]: any