Added migration file

InvenTree/stock/migrations/0012_auto_20190502_0058.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2 on 2019-05-01 14:58
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0011_auto_20190502_0041'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockitem',
+            name='part',
+            field=models.ForeignKey(help_text='Base part', on_delete=django.db.models.deletion.CASCADE, related_name='locations', to='part.Part'),
+        ),
+    ]