fix(dialog): add missing null type

[chouchouji]

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 新特性提交
• 文档改进
• 演示代码改进
• 组件样式/交互改进
• CI/CD 改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他

🔗 相关 Issue

• [Dialog] 按钮的属性设置为null报类型错误 #4400
• [Dialog] Dialog组件的confirm-btn传入null会出现ts错误 #3919

💡 需求背景和解决方案

📝 更新日志

• fix(Dialog): 修复 cancelBtn 和 confirmBtn 设置为null 的类型问题

• 本条 PR 不需要纳入 Changelog

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[github-actions]

[uyarn]

@chouchouji thanks for you PR! but didn't you reproduce it? it's normal in my IDE

[uyarn]

@chouchouji thanks for you PR! but didn't you reproduce it? it's normal in my IDE

I see, it's because of the strictNullChecks of my tsconfig is false :)

[gangchn]

So it is look like reasonable that set null as one of property cancelBtn type, because it is a nullable property and we also explicitly describe that it can be set to null in comment.

[uyarn]

would you mind fixing confirmBtn as well ?

[chouchouji]

would you mind fixing confirmBtn as well ?

I will complete it. Thanks for your review!

[chouchouji]

would you mind fixing confirmBtn as well ?

done