Added flake8 back in as development requirement

ehendrix23 · ehendrix23 · commit 642933eb634b · 2021-01-25T10:26:47.000-07:00
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -1,5 +1,6 @@
 -i https://pypi.python.org/simple
 aiohttp>=3.7
 black==20.8b1
+flake8>=3.8.4
 twine>=3.3.0
 wheel>=0.36.2
