Update schema to account for Marshmallow updates

Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>

app/schemas.py

@@ -588,31 +588,33 @@ class NotificationWithPersonalisationSchema(NotificationWithTemplateSchema):
     )
 
     class Meta(NotificationWithTemplateSchema.Meta):
-        # mark as many fields as possible as required since this is a public api.
+        # Mark as many fields as possible as required since this is a public api.
         # WARNING: Does _not_ reference fields computed in handle_template_merge, such as
         # 'body', 'subject' [for emails], and 'content_char_count'
-        fields = (
+
-            # db rows
+        # db rows
-            "billable_units",
+        billable_units = auto_field()
-            "created_at",
+        created_at = auto_field()
-            "id",
+        id = auto_field()
-            "job_row_number",
+        job_row_number = auto_field()
-            "notification_type",
+        notification_type = auto_field()
-            "reference",
+        reference = auto_field()
-            "sent_at",
+        sent_at = auto_field()
-            "sent_by",
+        sent_by = auto_field()
-            "status",
+        status = auto_field()
-            "template_version",
+        template_version = auto_field()
-            "to",
+        to = auto_field()
-            "updated_at",
+        updated_at = auto_field()
-            # computed fields
+
-            "personalisation",
+        # computed fields
-            # relationships
+        personalisation = auto_field()
-            "api_key",
+
-            "job",
+        # relationships
-            "service",
+        api_key = auto_field()
-            "template_history",
+        job = auto_field()
-        )
+        service = auto_field()
+        template_history = auto_field()
+
         # Overwrite the `NotificationWithTemplateSchema` base class to not exclude `_personalisation`, which
         # isn't a defined field for this class
         exclude = ()