Add missing migration

src/pretix/base/migrations/0109_auto_20190208_1432.py

@@ -0,0 +1,27 @@
+# Generated by Django 2.1 on 2019-02-08 14:32
+
+import django.db.models.deletion
+import jsonfallback.fields
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0108_auto_20190201_1527'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoiceline',
+            name='event_date_from',
+            field=models.DateTimeField(null=True),
+        ),
+        migrations.AddField(
+            model_name='invoiceline',
+            name='subevent',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.SubEvent'),
+        ),
+    ]