build(deps): bump cffi from 1.15.1 to 1.16.0

Bumps [cffi](https://github.com/python-cffi/cffi) from 1.15.1 to 1.16.0.
- [Release notes](https://github.com/python-cffi/cffi/releases)
- [Commits](https://github.com/python-cffi/cffi/compare/v1.15.1...v1.16.0)

---
updated-dependencies:
- dependency-name: cffi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -17,7 +17,7 @@ brevity==0.2.17
 cachetools==5.3.0
 cbor2==5.4.6
 certifi==2023.7.22
-cffi==1.15.1
+cffi==1.16.0
 charset-normalizer==3.3.0
 click==8.1.7
 colorama==0.4.6