Apply isort to the project

tests/unit/test_linter.py

@@ -1,5 +1,5 @@
-import unittest
 import tempfile
+import unittest
 
 from django.db.migrations import Migration
 

tests/unit/test_utils.py

@@ -1,6 +1,6 @@
 import unittest
 
-from django_migration_linter.utils import split_path, split_migration_path
+from django_migration_linter.utils import split_migration_path, split_path
 
 
 class SplitPathTestCase(unittest.TestCase):