Adds migration for privacy field

no actual change here, but it's a new field type

bookwyrm/migrations/0023_auto_20201214_0511.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.7 on 2020-12-14 05:11
+
+import bookwyrm.models.fields
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookwyrm', '0022_auto_20201212_1744'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='status',
+            name='privacy',
+            field=bookwyrm.models.fields.PrivacyField(choices=[('public', 'Public'), ('unlisted', 'Unlisted'), ('followers', 'Followers'), ('direct', 'Direct')], default='public', max_length=255),
+        ),
+    ]