Auto-update pre-commit hooks

Author: SerhatTeker

{{cookiecutter.project_slug}}/.pre-commit-config.yaml

@@ -11,17 +11,17 @@ repos:
       - id: check-yaml
 
   - repo: https://github.com/psf/black
-    rev: 20.8b1
+    rev: 21.4b2
     hooks:
       - id: black
 
   - repo: https://github.com/timothycrosley/isort
-    rev: 5.7.0
+    rev: 5.8.0
     hooks:
       - id: isort
 
   - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.8.4
+    rev: 3.9.1
     hooks:
       - id: flake8
         args: ['--config=setup.cfg']