Goal === Support newer Postgres versions: 13, 14, 15(beta) TODO / How to implement === - [ ] Currently, repot A002 says "Consider upgrading to the newest major version: 12" – there should be 14 as the latest available major version (not in beta). See https://gitlab.com/postgres-ai/postgres-checkup/-/blob/master/pghrep/internal/checkup/a002/a002.go - [ ] Adjust CI to test for newer PG versions: 13, 14 (15beta2 too but only if it's a low-hanging fruit; if it's not, create another issue for PG15) - [ ] test properly and ensure that postgres-checkup works well with 13 and 14 Acceptance criteria === - I can run postgres-checkup for Postgres 13, 14, and (maybe) 15beta2 - If I run postgres-checkup for older Postgres versions it suggests upgrading to newest PG major version, 14.