Fixed isValidNewOption when value is null

[vadimka123]

No description provided.

[JedWatson]

Thanks for the PR @vadimka123

I'm not clear on why / when this is a problem.

The call to isValidNewOption passes the value prop through cleanValue which will always return an Array.

Implementation here (from utils.js)

export const cleanValue = (value: ValueType): OptionsType => {
  if (Array.isArray(value)) return value.filter(Boolean);
  if (typeof value === 'object' && value !== null) return [value];
  return [];
};

Is there a logical path I'm missing that allows a falsey value to get through here? What problem is checking for !selectValue solving?

[vadimka123]

@JedWatson, I have seen this problem for quite some time
Perhaps she fixed
I will recheck and write about results

[vadimka123]

Yes, it's fixed