当我是用cocoapods安装‘KingfisherWebP’的时候，会报错：
[!] The following Swift pods cannot yet be integrated as static libraries:
The Swift pod `KingfisherWebP` depends upon `libwebp`, which does not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set `use_modular_headers!` globally in your Podfile, or specify `:modular_headers => true` for particular dependencies.
这个时候只要在Podfile中添加 use_frameworks! 即可，
添加后再次运行pod install问题解决。
