Add migration for extended_data field

aleksis/core/migrations/0008_extended_data.py

+# Generated by Django 3.0.2 on 2020-01-18 21:56
+
+import django.contrib.postgres.fields.jsonb
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0007_create_admin_user'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='group',
+            name='extended_data',
+            field=django.contrib.postgres.fields.jsonb.JSONField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='person',
+            name='extended_data',
+            field=django.contrib.postgres.fields.jsonb.JSONField(blank=True, null=True),
+        ),
+    ]