• Bump ffi from 1.9.8 to 1.11.1

    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>
    dependabot committed Oct 3, 2019