Upgrade flake8 to 4.0.1

diff --git a/psycopg/setup.py b/psycopg/setup.py
index 80f5a4dbb88a52309e5cbf55ff2639be5fdd919c..c3cd7250a1292dac42300ddb80d318fd914e38d2 100644 (file)
--- a/psycopg/setup.py
+++ b/psycopg/setup.py
@@ -47,7 +47,7 @@ extras_require = {
     # Requirements needed for development
     "dev": [
         "black",
-        "flake8 ~= 3.9.2",
+        "flake8 ~= 4.0.1",
         "mypy >= 0.910",
         "pytest-mypy >= 0.8.1",
         "types-setuptools >= 57.4.0",