Update isort from 4.3.18 to 4.3.20

pyup-bot · tony · commit cf7c44dc80a5 · 2019-05-18T11:55:49.000-05:00
diff --git a/requirements/dev.txt b/requirements/dev.txt
@@ -1,2 +1,2 @@
-isort==4.3.18
+isort==4.3.20
 flake8==3.7.7
