Use drupal/core-dev in .travis.yml

Author: webflo

Diff for: .travis.yml

@@ -29,7 +29,7 @@ install:
 
 script:
   - if [[ $RELEASE = dev ]]; then composer --verbose remove --no-update drupal/console; fi;
-  - if [[ $RELEASE = dev ]]; then composer --verbose require --no-update drupal/core-recommended:8.8.x-dev; composer --verbose require --no-update --dev drupal/dev-dependencies:8.8.x-dev; fi;
+  - if [[ $RELEASE = dev ]]; then composer --verbose require --no-update drupal/core-recommended:8.8.x-dev; composer --verbose require --no-update --dev drupal/core-dev:8.8.x-dev; fi;
   - if [[ $RELEASE = dev ]]; then composer --verbose update; fi;
   - cd $TRAVIS_BUILD_DIR/web
   - ./../vendor/bin/drush site-install --verbose --yes --db-url=sqlite://tmp/site.sqlite