Bump moto version to try solve dependencies version conflict

Also update mock import statements in some test files as they
stopped working with this dependency update.

tests/app/dao/test_fact_notification_status_dao.py

@@ -1,7 +1,7 @@
 from datetime import date, datetime, time, timedelta
+from unittest import mock
 from uuid import UUID
 
-import mock
 import pytest
 from freezegun import freeze_time