Update isort from 4.2.12 to 4.2.13

pyup-bot · codingjoe · commit 51e04285b169 · 2017-06-04T12:35:56.000+02:00
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -1,6 +1,6 @@
 -e .
 coverage==4.4.1
-isort==4.2.12
+isort==4.2.13
 py==1.4.33
 pytest-django==3.1.2
 pytest==3.1.1
