Update isort from 4.3.17 to 4.3.20

pyup-bot · pyup-bot · commit 7393f44e37d7 · 2019-06-17T16:02:29.000+02:00
diff --git a/requirements-test.txt b/requirements-test.txt
@@ -7,5 +7,5 @@ mock==3.0.5
 # Code style
 flake8==3.7.7
 # black
-isort==4.3.17
+isort==4.3.20
 pre-commit==1.15.2
