chore: add tests to select for internal state when options change

[scomea]

Test to see if state will fall out of sync when props are updated, such as adding/removing children.

ex. The select is instantiated with no items as children and is disabled, the user makes a change somewhere else in the UI which prompts a backend service to fetch data and items are populated in the select.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[chrisdholt]

closed with #3517