Fix Travis.
Fix Travis.

restotelry/schema-generator,api-platform/schema-generator,DarkGigaByte/schema-generator,restotelry/schema-generator,DarkGigaByte/schema-generator,dunglas/php-schema,dunglas/php-schema,dunglas/php-schema,DarkGigaByte/schema-generator,api-platform/schema-generator,restotelry/schema-generator