版本：0.7.0
- https://cdn.bootcss.com/lettering.js/0.7.0/jquery.lettering.js
- https://cdn.bootcss.com/lettering.js/0.7.0/jquery.lettering.min.js
版本：0.6.1
- https://cdn.bootcss.com/lettering.js/0.6.1/jquery.lettering.min.js
版本：0.6.0
- https://cdn.bootcss.com/lettering.js/0.6.0/jquery.lettering.js
- https://cdn.bootcss.com/lettering.js/0.6.0/jquery.lettering.min.js