Add PostgreSQL10 to TravisCI through Docker container. Use PHP7.2 instead of PHP7.1 as default test environment. Update to current stable MariaDB 10.2 from stable (GA) 10.1.
Add PostgreSQL10 to TravisCI through Docker container. Use PHP7.2 instead of PHP7.1 as default test environment. Update to current stable MariaDB 10.2 from stable (GA) 10.1.