pin flake8 at 3.7.9 (#679)

alrex · web-flow · commit 021723a5c1cd · 2020-05-11T21:46:43.000-07:00
diff --git a/dev-requirements.txt b/dev-requirements.txt
@@ -1,5 +1,5 @@
 pylint==2.4.4
-flake8~=3.7
+flake8==3.7.9
 isort~=4.3
 black>=19.3b0,==19.*
 mypy==0.740
