Postgres 10 on Travis

.travis.yml

env:
  global:
    - PGPORT=5433

language: ruby

rvm:
  - 2.5.1

cache:
  bundler: true

services:
  - postgresql

addons:
  postgresql: 10
  apt:
    packages:
    - postgresql-10
    - postgresql-client-10

before_script:
  - cp config/database.yml.travis config/database.yml

script:
  - bundle exec rake db:migrate
  - bundle exec rspec

database.yml.travis

# config/database.yml.travis

test:
  adapter: postgresql
  database: travis
  username: travis
  password: travis
  port: 5433