[Adam Girton](https://github.com/agirton)
- fixed; issue comparing objects in `getFocusableOptionIndex`, thanks
  [rndm2](https://github.com/rndm2)
- fixed; missing .focus() method in `Creatable`, thanks
  [Anton Alexandrenok](https://github.com/the-spyke)
- added; support for `aria-describedby` attribute, thanks
  [Eric Lee](https://github.com/ericj17)
- added; `.is-clearable` className when clearable is true, thanks