Added collection migration

apps/collection/migrations/0024_auto_20191215_2156.py

@@ -0,0 +1,23 @@
+# Generated by Django 2.2.7 on 2019-12-15 21:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('collection', '0023_advertorial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='collection',
+            name='rank',
+            field=models.IntegerField(default=None, null=True),
+        ),
+        migrations.AlterField(
+            model_name='collection',
+            name='start',
+            field=models.DateTimeField(blank=True, default=None, null=True, verbose_name='start'),
+        ),
+    ]