Update picker to v 4.2.0
Update picker to v 4.2.0

DanielYKPan/ng2-date-time-picker,DanielYKPan/date-time-picker,DanielYKPan/date-time-picker,DanielYKPan/ng2-date-time-picker,DanielYKPan/ng2-date-time-picker,DanielYKPan/date-time-picker