版本：3.0.1
- https://cdn.bootcss.com/flatpickr/3.0.1/flatpickr.css
- https://cdn.bootcss.com/flatpickr/3.0.1/flatpickr.js
- https://cdn.bootcss.com/flatpickr/3.0.1/flatpickr.min.css
- https://cdn.bootcss.com/flatpickr/3.0.1/flatpickr.min.js
- https://cdn.bootcss.com/flatpickr/3.0.1/ie.css