"--dev" is now default option for "composer install"

.travis.yml

@@ -32,7 +32,7 @@ matrix:
 
 before_script:
   - composer self-update
-  - composer install --prefer-dist --no-interaction --dev
+  - composer install --prefer-dist --no-interaction
   - sh -c "if [ '$DB' = 'mysql' ]; then mysql -e 'CREATE DATABASE cakephp_test;'; fi"
   - sh -c "if [ '$DB' = 'mysql' ]; then mysql -e 'CREATE DATABASE cakephp_test2;'; fi"
   - sh -c "if [ '$DB' = 'mysql' ]; then mysql -e 'CREATE DATABASE cakephp_test3;'; fi"