ci: add flake8 to pre-commit
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7ea971d..b2bf0ab 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,6 +17,11 @@
     hooks:
       - id: black
 
+  - repo: https://github.com/pycqa/flake8
+    rev: 5.0.4
+    hooks:
+      - id: flake8
+
   - repo: https://github.com/pycqa/isort
     rev: 5.10.1
     hooks: