chore(.flake8): set max line length to 120

loonghao · loonghao · commit 3a4a9e5418f1 · 2022-07-10T15:40:53.000+08:00
diff --git a/.flake8 b/.flake8
@@ -30,3 +30,4 @@ exclude =
     venv,
     docs
 
+max-line-length = 120
