Update isort from 4.3.16 to 4.3.18

pyup-bot · tony · commit 4d2215f9c7aa · 2019-05-12T09:59:51.000-05:00
diff --git a/requirements/dev.txt b/requirements/dev.txt
@@ -1,2 +1,2 @@
-isort==4.3.16
+isort==4.3.18
 flake8==3.7.7
