add migration for fix deprecated JSONfield

backend/metagenedb/apps/catalog/migrations/0027_fix_deprecated_jsonfield.py

+# Generated by Django 3.1 on 2020-09-16 14:41
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('catalog', '0026_meta_statistics'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='statistics',
+            name='body',
+            field=models.JSONField(),
+        ),
+        migrations.AlterField(
+            model_name='taxonomy',
+            name='hierarchy',
+            field=models.JSONField(null=True),
+        ),
+    ]