Added a migration that seems to have resulted from running a newer version of django-simple-history.

- Legacy-Id: 15909

ietf/group/migrations/0009_auto_20190122_1012.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.18 on 2019-01-22 10:12
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('group', '0008_group_features_onetoone'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='historicalgroupfeatures',
+            name='agenda_type',
+            field=models.ForeignKey(blank=True, db_constraint=False, default=b'ietf', null=True, on_delete=django.db.models.deletion.DO_NOTHING, related_name='+', to='name.AgendaTypeName'),
+        ),
+    ]