ApeVoloRequiredAttribute 的AttributeUsage警告

[Tao Song]

// [AttributeUsage(AttributeTargets.Method)]
public class ApeVoloRequiredAttribute : Attribute
{
    /// <summary>
    /// 验证失败说明内容
    /// </summary>
    public string? Message { get; set; }
}

修改为：

[AttributeUsage(AttributeTargets.Field|AttributeTargets.Property)]
public class ApeVoloRequiredAttribute : Attribute
{
    /// <summary>
    /// 验证失败说明内容
    /// </summary>
    public string? Message { get; set; }
}

我看了下ApeVoloRequired的代码，都是属性，改成下面也可以

[AttributeUsage(AttributeTargets.Property)]
public class ApeVoloRequiredAttribute : Attribute
{
    /// <summary>
    /// 验证失败说明内容
    /// </summary>
    public string? Message { get; set; }
}

关于AttributeTargets枚举参考：
https://docs.microsoft.com/zh-cn/dotnet/api/system.attributetargets?view=net-6.0

[apevolo]

@huster-songtao 已优化，谢谢