Added support for php 7.1 in .travis.yml (#863)
Added support for php 7.1 in .travis.yml (#863)


martinvd/PHPMailer,iFixit/PHPMailer,Synchro/PHPMailer,jimjag/PHPMailer,iFixit/PHPMailer,JesusTheHun/PHPMailer,pingyen/PHPMailer,Dubz/PHPMailer,PHPMailer/PHPMailer,nawawi/PHPMailer,martinvd/PHPMailer,Synchro/PHPMailer,pingyen/PHPMailer,ravisorg/PHPMailer,Dubz/PHPMailer,PHPMailer/PHPMailer,namepros/PHPMailer,ravisorg/PHPMailer,JesusTheHun/PHPMailer,nawawi/PHPMailer,namepros/PHPMailer,jimjag/PHPMailer