[Security] Bump ffi from 1.9.18 to 1.9.25 in /src/api

Bumps [ffi](https://github.com/ffi/ffi) from 1.9.18 to 1.9.25. **This update includes security fixes.**
- [Release notes](https://github.com/ffi/ffi/releases)
- [Changelog](https://github.com/ffi/ffi/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ffi/ffi/compare/1.9.18...1.9.25

)

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