update travis config to run on PHP 7.0 and 7.1
update travis config to run on PHP 7.0 and 7.1

Mohammad-Alavi/Samandoon,Mohammad-Alavi/Samandoon,Porto-SAP/Hello-API,apiato/apiato,Porto-SAP/Hello-API,Mahmoudz/Hello-API,apiato/apiato,Mohammad-Alavi/Samandoon,Mahmoudz/Hello-API,Mohammad-Alavi/Samandoon,apiato/apiato,Porto-SAP/Hello-API