react+antd+dva 上传文件组件
使用说明：
页面引入组件 "# "
参数说明：
files：文件数组
onUpload：上传方法
onRemove：删除文件
data：上传携带参数
multiple：是否批量上传 默认false
showWeb：是否显示网络图片 默认false
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