Bumps [ffi](https://github.com/ffi/ffi) from 1.9.8 to 1.11.1.
- [Release notes](https://github.com/ffi/ffi/releases)
- [Changelog](https://github.com/ffi/ffi/blob/master/CHANGELOG.md)
- [Commits](ffi/ffi@1.9.8...1.11.1)

Signed-off-by: dependabot[bot] <support@github.com>