✨ [Feature]: tree使用自定义的data类型

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What problem does this feature solve

我想使用自定义的data树形结构，比如后台返回的数据是[{title: 'Parent node 1'},{title: 'Parent node 1'}]而非label

What does the proposed API look like

可不可以加个自定义字段名的属性 :prop="{ label: 'title'}"