[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.9b0 → 21.10b0](psf/black@21.9b0...21.10b0)
- [github.com/PyCQA/flake8: 3.9.2 → 4.0.1](PyCQA/flake8@3.9.2...4.0.1)
- [github.com/PyCQA/isort: 5.9.3 → 5.10.0](PyCQA/isort@5.9.3...5.10.0)

.pre-commit-config.yaml

@@ -3,14 +3,14 @@ default_language_version:
 
 repos:
 -   repo: https://github.com/psf/black
-    rev: 21.9b0
+    rev: 21.10b0
     hooks:
     - id: black
       pass_filenames: true
       args: ["--config", "backend-project/pyproject.toml"]
       exclude: "migrations/"
 -   repo: https://github.com/PyCQA/flake8
-    rev: 3.9.2
+    rev: 4.0.1
     hooks:
     - id: flake8
       pass_filenames: true
@@ -40,7 +40,7 @@ repos:
     hooks:
     -   id: rst-backticks
 -   repo: https://github.com/PyCQA/isort
-    rev: '5.9.3'  # Use the revision sha / tag you want to point at
+    rev: '5.10.0'  # Use the revision sha / tag you want to point at
     hooks:
     -   id: isort
         args: ["--settings-file", "backend-project/pyproject.toml"]