tree结构统一修改属性名（递归）

 1 //data为需要修改的tree，这里主要是为antd design 里面select规范数据
 const ass = (data) => {
         let item = [];
         data.map((list, i) => {
                 let newData = {};
                 newData.key= list.id;
                 newData.value = list.id;
                 newData.title = list.name;
                 newData.children = list.children  ? ass(children) : [];    //如果还有子集，就再次调用自己
                 item.push(newData);
         });
         return item;
  }