isRequired removed on Select?

From reading this it seems that Select has replaced single-select and multi-select. I haven’t used those, but the migration guide says that the isRequired prop has been removed. This leaves me wondering why that is and how i should handle a required select element in a form now.

Am i overlooking something? Why does the following not work?

<Field name="color" defaultValue="" isRequired>
  {({ fieldProps }) => (
    <Select
      {...fieldProps}
      options={[{ label: 'red', value: 'red' }, { label: 'blue', value: 'blue' }]}
    />
  )}
</Field>