Merge migration branches

Also add $@ to bw-dev migrations, and factor the shift 1 out

bookwyrm/migrations/0014_merge_20201128_0007.py

@@ -0,0 +1,14 @@
+# Generated by Django 3.0.7 on 2020-11-28 00:07
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookwyrm', '0013_book_origin_id'),
+        ('bookwyrm', '0012_progressupdate'),
+    ]
+
+    operations = [
+    ]