修复设置多个文件上传表单并设置了required验证规则时无法编辑错误

src/Form/Field/File.php

@@ -60,6 +60,10 @@ class File extends Field implements UploadFieldInterface
             return $this->validator->call($this, $input);
         }
 
+        if (! Arr::has($input, $this->column)) {
+            return false;
+        }
+
         $value = Arr::get($input, $this->column);
         $value = array_filter(is_array($value) ? $value : explode(',', $value));