Expose input onChange event to ReactSelect

[mattt-b]

Would love to be able to easily access the onChange event for the input component (typing in the bar, not selecting a value).

[strctr]

+1. Eah, highly expected feature. For example, selector used inside popover which is collapsed by any click outside it. Now I am should intercept mouse events on the top of selector to avoid popover collapse. This is really hated boilerplate code.

[lomteslie]

I'd love to have this feature as well. Just submitted a pull request that would add this functionality.