版本：1.4.7
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether-theme-arrows-dark.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether-theme-arrows-dark.min.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether-theme-arrows.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether-theme-arrows.min.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether-theme-basic.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether-theme-basic.min.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/css/tether.min.css
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/js/tether.js
- https://cdn.bootcdn.net/ajax/libs/tether/1.4.7/js/tether.min.js