Reorder all imports

apps/map/migrations/0051_auto_20180404_2215.py

@@ -3,8 +3,9 @@
 from __future__ import unicode_literals
 
 import django.contrib.gis.db.models.fields
-from django.db import migrations, models
 import multiselectfield.db.fields
+from django.db import migrations
+from django.db import models
 
 
 class Migration(migrations.Migration):