isort: move config to setup.cfg

Author: blueyed

.isort.cfg

@@ -7,3 +7,11 @@ license_file = LICENSE.md
 [flake8]
 ignore = E501
 banned-modules = json = use from rest_framework.utils import json!
+
+[isort]
+skip=.tox
+atomic=true
+multi_line_output=5
+known_standard_library=types
+known_third_party=pytest,_pytest,django
+known_first_party=rest_framework