Add migration file

InvenTree/part/migrations/0046_auto_20200804_0107.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.7 on 2020-08-04 01:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0045_auto_20200605_0932'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='partcategory',
+            name='default_keywords',
+            field=models.CharField(blank=True, help_text='Default keywords for parts in this category', max_length=250, null=True),
+        ),
+    ]