Update the accessible-autocomplete to support the latest version of React

[vanitabarrett]

What

Update and test the accessible-autocomplete to support the latest version of React possible. We should aim for the newest version (https://reactjs.org/versions/), but we're not sure how complex this work will be do to. If we're unable to support the latest version, see if we can support versions 17 or 16 at a minimum.

Related tickets

• [ ] https://github.com/alphagov/accessible-autocomplete/issues/280
• [ ] https://github.com/alphagov/accessible-autocomplete/issues/418

Done When

• [ ] Investigate if there are any forks of this repo which have already updated - we can look at these for guidance and/or ask for contributions
• [ ] This repo has been updated to work with a newer version of React
• [ ] Tests are still passing and we've checked the functionality in the examples is still working as expected
• [ ] Updated any documentation which states what version the project works with