Postgres13 on Focal

.travis.yml

---
dist: focal
language: ruby

addons:
  postgresql: '13'
  apt:
      packages:
        - postgresql-13
env:
  global:
  - PGUSER=postgres
  - PGPORT=5432
  - PGHOST=localhost
before_install:
- sudo sed -i -e '/local.*peer/s/postgres/all/' -e 's/peer\|md5/trust/g' /etc/postgresql/*/main/pg_hba.conf
- sudo service postgresql restart
- sleep 1
- postgres --version

script:
  - psql -c 'create database travis_ci_test;' -U postgres