pre-commit hooks automatic update

updates:
- https://github.com/myint/autoflake → https://github.com/PyCQA/autoflake
- [github.com/PyCQA/autoflake: v1.4 → v1.6.1](PyCQA/autoflake@v1.4...v1.6.1)

.pre-commit-config.yaml

@@ -6,8 +6,8 @@ repos:
       - id: isort
         # See https://pycqa.github.io/isort/docs/configuration/multi_line_output_modes.html
         args: [--skip=soweego/cli.py, --multi-line=5, --line-length=88]
-  - repo: https://github.com/myint/autoflake
-    rev: v1.4
+  - repo: https://github.com/PyCQA/autoflake
+    rev: v1.6.1
     hooks:
       - id: autoflake
         args: [--in-place, --recursive, --remove-all-unused-imports, --remove-unused-variables]