release 1.6.4
release 1.6.4

chmln/flatpickr,adhoc-gti/flatpickr,sylvaingi/flatpickr,Kreshnik/flatpickr,Kreshnik/flatpickr,chmln/flatpickr,adhoc-gti/flatpickr,SchipholRedesign/flatpickr,SchipholRedesign/flatpickr