Bump autoflake from 1.6.1 to 1.7.7

Bumps [autoflake](https://github.com/PyCQA/autoflake) from 1.6.1 to 1.7.7.
- [Release notes](https://github.com/PyCQA/autoflake/releases)
- [Commits](PyCQA/autoflake@v1.6.1...v1.7.7)

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

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

requirements.txt

@@ -11,7 +11,7 @@ build==0.8.0
 twine==4.0.1
 
 # Testing
-autoflake==1.6.1
+autoflake==1.7.7
 black==22.8.0
 flake8==3.9.2
 importlib-metadata==4.13.0; python_version>='3.7'