Merge branch 'main' into switch-edition

bookwyrm/migrations/0017_auto_20201212_0059.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.7 on 2020-12-12 00:59
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookwyrm', '0016_auto_20201211_2026'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='readthrough',
+            name='book',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='bookwyrm.Edition'),
+        ),
+    ]