fix onInputChange

[svsool]

fix for #1363, value returned from onInputChange will used as nextState in Select.js see https://github.com/JedWatson/react-select/blob/master/src/Select.js#L450, otherwise value normalisation not working

[coveralls]

Coverage increased (+0.01%) to 92.318% when pulling 31b4b90 on svsool:fix2 into ef3a468 on JedWatson:master.

[JedWatson]

I believe this can be closed now because #2057 has been merged, could everyone please confirm that it solves the problem correctly for their use-case? and continue discussion on #2056 if not.

Thanks!

[svsool]

Yes, this problem solved in #2057, thanks