Add custom migration for the part_supplierpricebreak model

- Copies across existing pricing data
- Yikes

InvenTree/company/migrations/0025_auto_20201110_1001.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.0.7 on 2020-11-10 10:01
+
+from django.db import migrations, connection
+import djmoney.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('company', '0024_unique_name_email_constraint'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='supplierpricebreak',
+            name='price',
+            field=djmoney.models.fields.MoneyField(decimal_places=4, default_currency='USD', help_text='Unit price at specified quantity', max_digits=19, null=True, verbose_name='Price'),
+        ),
+        migrations.AddField(
+            model_name='supplierpricebreak',
+            name='price_currency',
+            field=djmoney.models.fields.CurrencyField(choices=[('AUD', 'Australian Dollar'), ('CAD', 'Canadian Dollar'), ('EUR', 'Euro'), ('NZD', 'New Zealand Dollar'), ('GBP', 'Pound Sterling'), ('USD', 'US Dollar'), ('JPY', 'Yen')], default='USD', editable=False, max_length=3),
+        ),
+    ]