fix: adaptive height issue with divider

[oljc]

Types of changes

• New feature
• Bug fix
• Enhancement
• Component style change
• Typescript definition change
• Documentation change
• Coding style change
• Refactoring
• Test cases
• Continuous integration
• Breaking change
• Others

Background and context

竖向时无法跟随周围的高度变化。
复现地址

Solution

调整为最小高度1em，其他自动跟随外层高度撑开
其实原本这个问题可以使用者直接通过style解决，就看这个特性是否变为组件默认。

How is the change tested?

Changelog

Component	Changelog(CN)	Changelog(EN)	Related issues
divider	修复竖向自适应高度	fix adaptive height issue with divider

Checklist:

• Test suite passes (npm run test)
• Provide changelog for relevant changes (e.g. bug fixes and new features) if applicable.
• Changes are submitted to the appropriate branch (e.g. features should be submitted to feature branch and others
  should be submitted to main branch)

Other information

[flsion]

@LIjiAngChen8 这里占满容器的高度更好，更符合一些实际使用场景