版本：0.3.6
- https://cdn.bootcdn.net/ajax/libs/FlexSearch/0.3.6/flexsearch.compact.js
- https://cdn.bootcdn.net/ajax/libs/FlexSearch/0.3.6/flexsearch.es5.js
- https://cdn.bootcdn.net/ajax/libs/FlexSearch/0.3.6/flexsearch.light.js
- https://cdn.bootcdn.net/ajax/libs/FlexSearch/0.3.6/flexsearch.min.js