add migration

apps/review/migrations/0017_auto_20191115_0737.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.4 on 2019-11-15 07:37
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('review', '0016_remove_review_language'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='review',
+            name='reviewer',
+            field=models.ForeignKey(blank=True, default=None, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='reviews', to=settings.AUTH_USER_MODEL, verbose_name='Reviewer'),
+        ),
+    ]