Fix isort configuration

Author: hramezani

Makefile

@@ -22,7 +22,7 @@ docs:
 
 # See setup.cfg for configuration.
 isort:
-	find pytest_django tests -name '*.py' -exec isort {} +
+	isort pytest_django pytest_django_test tests
 
 clean:
 	rm -rf bin include/ lib/ man/ pytest_django.egg-info/ build/

setup.cfg

@@ -73,6 +73,12 @@ exclude = lib/,src/,docs/,bin/
 
 [isort]
 forced_separate = tests,pytest_django,pytest_django_test
+combine_as_imports = true
+default_section = THIRDPARTY
+include_trailing_comma = true
+known_first_party = formtools
+line_length = 79
+multi_line_output = 5
 
 [mypy]
 check_untyped_defs = True