Update isort from 4.3.19 to 4.3.20 (#631)

pyup-bot · sliverc · commit f048aa2aa9dd · 2019-05-15T12:29:18.000+02:00
diff --git a/requirements-development.txt b/requirements-development.txt
@@ -6,7 +6,7 @@ Faker==1.0.7
 factory-boy==2.12.0
 flake8==3.7.7
 flake8-isort==2.7.0
-isort==4.3.19
+isort==4.3.20
 mock==3.0.5
 pytest==4.5.0
 pytest-cov==2.7.1
