Bump cffi from 1.12.0 to 1.12.1
Bump cffi from 1.12.0 to 1.12.1

Bumps [cffi](https://bitbucket.org/cffi/release-doc) from 1.12.0 to 1.12.1.
- [Commits](https://bitbucket.org/cffi/release-doc/commits)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Kinto/kinto-attachment