Update PostgreSQL version in Travis builds for SS 4.2.x or higher, an…

…d update recipe versions

.travis.yml

@@ -11,19 +11,20 @@ matrix:
     - php: 5.6
       env: DB=MYSQL RECIPE_VERSION=1.1.x-dev PHPUNIT_TEST=1
     - php: 7.0
-      env: DB=PGSQL RECIPE_VERSION=1.1.x-dev PHPUNIT_TEST=1
+      env: DB=PGSQL RECIPE_VERSION=4.2.x-dev PHPUNIT_TEST=1
     - php: 7.1
-      env: DB=PGSQL RECIPE_VERSION=1.2.x-dev PHPUNIT_TEST=1
+      env: DB=PGSQL RECIPE_VERSION=4.2.x-dev PHPUNIT_TEST=1
     - php: 7.2
-      env: DB=MYSQL RECIPE_VERSION=1.x-dev PHPUNIT_COVERAGE_TEST=1
+      env: DB=MYSQL RECIPE_VERSION=4.x-dev PHPUNIT_COVERAGE_TEST=1
 
 before_script:
   # Init PHP
   - phpenv rehash
   - phpenv config-rm xdebug.ini || true
 
   - composer require --no-update silverstripe/recipe-cms "$RECIPE_VERSION"
-  - if [[ $DB == PGSQL ]]; then composer require --no-update silverstripe/postgresql:2.0.x-dev; fi
+  # Note: Postgres version is for SilverStripe >= 4.2.x
+  - if [[ $DB == PGSQL ]]; then composer require --no-update silverstripe/postgresql:2.1.x-dev; fi
   - composer install --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
 
 script: