fix(backend): merge migration

backend/backend_app/migrations/0004_merge_20200503_1749.py

+# Generated by Django 2.1.7 on 2020-05-03 15:49
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("backend_app", "0003_partner_is_destination_open"),
+        ("backend_app", "0003_auto_20200503_1514"),
+    ]
+
+    operations = []