Use composer script instead of phpunit

.travis.yml

@@ -31,7 +31,7 @@ install:
   - composer install --prefer-dist --no-interaction
 
 script:
-  - vendor/bin/phpunit
+  - composer test
   - yarn test
 
 addons:

composer.json

@@ -63,6 +63,9 @@
         ],
         "post-create-project-cmd": [
             "php artisan key:generate"
+        ],
+        "test": [
+            "phpunit"
         ]
     },
     "config": {