update flake8 version in pre-commit

cp-bagerard · cp-bagerard · commit bf12621ce9ee · 2020-12-13T00:14:53.000+01:00
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
@@ -5,7 +5,7 @@ repos:
     hooks:
       - id: black
   - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.8.0a2
+    rev: 3.8.4
     hooks:
       - id: flake8
         additional_dependencies:
