解决VantUI Uploader组件上传后不刷新

1. 给Uploader组件设置一个变化的key

2. 上传图片后通过更新key引起虚拟DOM的刷新

<van-uploader 
	:key="uploaderKey" 
	:after-read="afterRead"
	v-model="fileList" 
	@delete="handleDelete" 
	:max-count="1" 
	accept=".png,.jpg,.jpeg">

  <template #preview-cover="{ file }">
    <img :src="file.url || ruleForm.imgCertificateFace" alt=""/>
  </template>
</van-uploader>

const uploaderKey = ref(0);

const refreshUploader = () => {
  uploaderKey.value += 1; // 改变 key 的值以强制重新渲染
};

const afterRead = (file) => {
	// 其他处理
    refreshUploader();
}

const handleDelete = (index) => {
  // 其他处理
  refreshUploader()
}