PostgreSQL 13.2, 13.3, 13.4, 13.6, 13.7, 13.8, 13.10, 13.11, 13.12, 13.13, 13.14, 14.7, 14.8, 14.9, 14.10, 14.11, 15.5, 15.6 PostgreSQL License (BSD / MIT Licence)