[invoices] Quantities can be non-integers

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

apps/wei/migrations/0002_auto_20210313_1235.py

@@ -0,0 +1,23 @@
+# Generated by Django 2.2.19 on 2021-03-13 11:35
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('wei', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='weiclub',
+            name='year',
+            field=models.PositiveIntegerField(default=2021, unique=True, verbose_name='year'),
+        ),
+        migrations.AlterField(
+            model_name='weiregistration',
+            name='information_json',
+            field=models.TextField(default='{}', help_text='Information about the registration (buses for old members, survey for the new members), encoded in JSON', verbose_name='registration information'),
+        ),
+    ]