内置组件“component”支持VNode类型

[gouxiwen]

文档中只支持string和Component类型

实际上VNode类型也支持

[bencodezen]

For those who don't read Chinese, this issue is requesting an update on the supported types for the <component>'s is property which can also take a Node based on the given example.

The is to update the docs to reflect this supported type.