chore: Bump flake8, flake8-comprehensions and flake8-bugbear.

flake8 version 6.0.0 had a bug that lead to false positives for E231 in
Python 3.12 which was fixed in 6.1.0. This commit bumps flake8 to 6.1.0,
flake8-comprehensions to 3.14.0, to pick up explicit support for
Python 3.12, and flake8-bugbear to 23.9.16 to pick up support for 3.12
and a bugfix.

.pre-commit-config.yaml

@@ -7,7 +7,7 @@ repos:
         exclude: rednotebook/external/.*\.py
 
   - repo: https://github.com/pycqa/flake8
-    rev: '6.0.0'
+    rev: '6.1.0'
     hooks:
       - id: flake8
 

tox.ini

@@ -30,10 +30,10 @@ filterwarnings =
 basepython = python3
 deps =
   black==22.3.0
-  flake8==6.0.0
+  flake8==6.1.0
   flake8-2020==1.7.0
-  flake8-bugbear==23.1.14
-  flake8-comprehensions==3.10.1
+  flake8-bugbear==23.9.16
+  flake8-comprehensions==3.14.0
   pyupgrade==2.28.0
 allowlist_externals =
   bash