Add PHP 7.3 and SilverStripe 4.3 to Travis builds, and use recipe-cms…

… to fix versioned mismatch

.travis.yml

@@ -11,14 +11,16 @@ matrix:
     - php: 7.1
       env: DB=MYSQL RECIPE_VERSION=4.2.x-dev PHPUNIT_COVERAGE_TEST=1
     - php: 7.2
-      env: DB=PGSQL RECIPE_VERSION=4.x-dev PHPUNIT_TEST=1
+      env: DB=PGSQL RECIPE_VERSION=4.3.x-dev PHPUNIT_TEST=1
+    - php: 7.3
+      env: DB=MYSQL RECIPE_VERSION=4.x-dev PHPUNIT_TEST=1
 
 before_script:
   - phpenv rehash
   - phpenv config-rm xdebug.ini
   - echo 'memory_limit = 2G' >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
   - composer validate
-  - composer require silverstripe/recipe-core "$RECIPE_VERSION" --no-update
+  - composer require silverstripe/recipe-cms:"$RECIPE_VERSION" --no-update
   - if [[ $DB == PGSQL ]]; then composer require silverstripe/postgresql:2.1.x-dev --no-update; fi
   - composer install --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile