Add missing billnico migration

uncloud_pay/migrations/0012_billnico.py

@@ -0,0 +1,29 @@
+# Generated by Django 3.0.6 on 2020-05-08 07:06
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('uncloud_pay', '0011_billingaddress_organization'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='BillNico',
+            fields=[
+                ('uuid', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('creation_date', models.DateTimeField(auto_now_add=True)),
+                ('starting_date', models.DateTimeField()),
+                ('ending_date', models.DateTimeField()),
+                ('due_date', models.DateField()),
+                ('valid', models.BooleanField(default=True)),
+                ('owner', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]