Add aria-describedby attribute

[sreahard]

Added aria-describedby attribute support in order to link elements to the react-select select input such as help text and validation errors.

The prop was added with pr #1571 but somehow got removed in the current version. This adds it back.

Per the upgrading docs:

aria-describedby | unchanged

Fixes #1570

[bdrazen]

Still not able to set aria-describedby. 🙁 Has no one else looked into this?

Edit: My workaround was to define a custom component:

import Select, { components } from 'react-select';

<Select
  ...
  components={{ Input: MyInput }}
/>

const MyInput = (props) => <components.Input {...props} aria-describedby={someId} />

[bladey]

Hi @sreahard, thanks for your contribution, I've since taken your changes and updated them to support master and the new test framework, see PR #4082.