Revert "pin flake8 at 3.7.9 (#679)" (#1017)

ffe4 · web-flow · commit eaf5bba24fcf · 2020-08-19T13:38:33.000-05:00
This reverts commit 021723a. Underlying issue was fixed by commit 20cf4cb.
diff --git a/dev-requirements.txt b/dev-requirements.txt
@@ -1,5 +1,5 @@
 pylint==2.4.4
-flake8==3.7.9
+flake8~=3.7
 isort~=4.3
 black>=19.3b0,==19.*
 mypy==0.770
