Update dependency flake8 to v7

renovate[bot] · web-flow · commit d1cda063f3fa · 2025-06-20T20:55:20.000Z
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -1,4 +1,4 @@
 # Includes base requirements as well as dev requirements
 -r requirements.txt
-flake8==3.8.3
+flake8==7.3.0
 codecov==2.1.9
