* improve types of `Combobox`
Now given the `multiple` and/or `nullable` props we ensure that the
types for the `value`, `defaultValue`, `onChange`, `by`, render prop,
... are all correct.
You will also be able to easily tell which type to use instead of
inferring it by doing something like this:
```tsx
<Combobox<ExplicitTypeHere>
value={...}
onChange={...}
...
>
...
</Combobox>
```
* update changelog
Robin Malfait
486ac8075d