Add CDNJS version badge in readme (#356)
Add CDNJS version badge in readme (#356)

This will add the badge to show its version on CDNJS and also link to its page on CDNJS!
SchipholRedesign/flatpickr,SchipholRedesign/flatpickr,adhoc-gti/flatpickr,sylvaingi/flatpickr,chmln/flatpickr,adhoc-gti/flatpickr,chmln/flatpickr