Try to fix travis CI

.travis.yml

@@ -8,6 +8,10 @@ before_script:
   - composer self-update
   - composer install --no-interaction
   - php artisan key:generate
+  - php artisan migrate:refresh
+  - php artisan passport:install
+  - php artisan storage:link
+  - php artisan config:cache
 
 script:
 - vendor/bin/phpunit