.travis.yml in superstore-2.2.0 vs .travis.yml in superstore-2.3.0

@@ -1,9 +1,23 @@
 language: ruby
 rvm:
-- 2.0.0-p647
-- 2.1.7
-- 2.2.3
-sudo: false
+- 2.1.10
+- 2.2.5
+- 2.3.1
+sudo: required
+dist: trusty
 cache: bundler
-addons:
-  postgresql: '9.4'
+before_install:
+# https://github.com/travis-ci/travis-ci/issues/4264
+- sudo cp /etc/postgresql/9.4/main/pg_hba.conf /tmp
+- sudo add-apt-repository "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg 9.5"
+- sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 7FCC7D46ACCC4CF8
+- sudo apt-get update
+- sudo service postgresql stop
+- for version in 9.1 9.2 9.3 9.4; do sudo pg_dropcluster --stop $version main; done
+- sudo apt-get remove --purge --yes postgresql-9.[1234]
+- sudo apt-get install --no-install-recommends --yes postgresql-client-9.5 postgresql-9.5
+- sudo apt-get autoremove --yes
+- sudo cp /tmp/pg_hba.conf /etc/postgresql/9.5/main/
+- sudo service postgresql restart
+- sudo -u postgres createuser -s travis
+- sudo -u postgres createdb -O travis travis