Calendar does not rerender when we change "disabled" prop

[Jonathan-Jan]

Hi,

I don't think that fix for #258 is OK

I don't really get the correction. This way we can't update the disabled prop at runtime. (when disabled the component will no longer re-render).
Why not just add nextProps.disabled !== this.props.disabled ? like this :

shouldComponentUpdate(nextProps, nextState) { return (nextProps.value !== this.props.value) || (this.state.currentMonth !== nextState.currentMonth) || (this.state.currentYear !== nextState.currentYear) || (this.props.minDate !== nextProps.minDate) || (this.props.maxDate !== nextProps.maxDate) || nextProps.disabled !== this.props.disabled; }