Allow to hide products that require membership (#2240)

Co-authored-by: Richard Schreiber <schreiber@rami.io>

src/pretix/base/migrations/0199_auto_20211005_1050.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.2.4 on 2021-10-05 10:50
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0198_invoice_sent_to_customer'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='require_membership_hidden',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='itemvariation',
+            name='require_membership_hidden',
+            field=models.BooleanField(default=False),
+        ),
+    ]