Invalid prop: type check failed for prop “value“. Expected String, Number, got Array
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select改为多选属性，onchange事件报错
报错内容：Invalid prop: type check failed for prop “value”. Expected String, Number, got Array。
原因：relateuserCount在该change事件中有赋值，该属性本身是string类型，prop也是该属性。但是现在复制强制改成数组类型，但是prop并不支持prop为数组类型，prop对应值只能是string或者number，导致报错。
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