Creatable component doesn't allow input key down handling.

[IvanLeonenko]

First of all, thanks for a nice component.

Creatable component has own handler of onInputKeyDown, which doesn't check if there's user's handler provided. So setting a handler for onInputKeyDown has no effect.

Doesn't work:

<Creatable
    onInputKeyDown={this.inputKeyDownHandler}
/>

I think, Creatable should call user's handler as well, otherwise it breaks defined API.

Going to create pull request on that.

[JedWatson]

Fixed by #1248

@JedWatson Very nice Component, thank you ! I have this issue with 1.0.0-rc.2. Is there any chance this update could be merged to it ?