Build Fail in iOS

```
Could not build the precompiled application for the device.
Lexical or Preprocessor Issue (Xcode): 'disk_space_plus/disk_space_plus-Swift.h' file not found
/Users/rdapp/.pub-cache/hosted/pub.dev/disk_space_plus-0.2.4/ios/Classes/DiskSpacePlusPlugin.m:1:8
```

It cannot build.