TS2345 type error when passing `undefined` to a HTML prop/attribute

```ts
import van from 'mini-van-plate'
const { a }  = van.tags
a({ id: undefined })
```

results in a TS2345 error

```
TS2345: Argument of type  { id:undefined; }  is not assignable to parameter of type  ChildDom<Element, Text>|Props 
Type  { id:undefined; }  is not assignable to type  undefined
```