Bump autoflake from 1.4 to 1.7.7

Bumps [autoflake](https://github.com/PyCQA/autoflake) from 1.4 to 1.7.7.
- [Release notes](https://github.com/PyCQA/autoflake/releases)
- [Commits](PyCQA/autoflake@v1.4...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

@@ -19,7 +19,7 @@ build==0.8.0
 twine==4.0.1
 
 # Tests & Linting
-autoflake==1.4
+autoflake==1.7.7
 black==22.8.0
 coverage==6.4.4
 cryptography==38.0.1