Update dependency flake8 to v7

renovate[bot] · web-flow · commit 9f6708a1a67c · 2025-03-29T21:58:19.000Z
diff --git a/test-requirements.txt b/test-requirements.txt
@@ -1,6 +1,6 @@
 -r requirements.txt
 pyflakes==2.2.0
-flake8==3.8.3
+flake8==7.2.0
 pylint==2.5.3
 pytype==2020.7.20
 git+https://github.com/faucetsdn/faucet
