[Travis] Allow failures for PHP 7.2 builds
[Travis] Allow failures for PHP 7.2 builds

Mozan/Sylius,mbabker/Sylius,GSadee/Sylius,itinance/Sylius,antonioperic/Sylius,vihuvac/Sylius,Joypricecorp/Sylius,NeverResponse/Sylius,Sylius/Sylius,Mozan/Sylius,gseidel/Sylius,Arminek/Sylius,torinaki/Sylius,Sylius/Sylius,antonioperic/Sylius,torinaki/Sylius,Mozan/Sylius,kayue/Sylius,vihuvac/Sylius,gorkalaucirica/Sylius,venyii/Sylius,gseidel/Sylius,Zales0123/Sylius,dragosprotung/Sylius,videni/Sylius,mbabker/Sylius,dragosprotung/Sylius,ezecosystem/Sylius,dragosprotung/Sylius,Brille24/Sylius,dragosprotung/Sylius,101medialab/Sylius,itinance/Sylius,gorkalaucirica/Sylius,bitbager/Sylius,mbabker/Sylius,Joypricecorp/Sylius,gseidel/Sylius,GSadee/Sylius,Arminek/Sylius,gseidel/Sylius,mbabker/Sylius,NeverResponse/Sylius,NeverResponse/Sylius,vihuvac/Sylius,Brille24/Sylius,101medialab/Sylius,itinance/Sylius,Mozan/Sylius,pamil/Sylius,Zales0123/Sylius,Brille24/Sylius,diimpp/Sylius,Mozan/Sylius,SyliusBot/Sylius,bitbager/Sylius,bitbager/Sylius,foobarflies/Sylius,pjedrzejewski/Sylius,Arminek/Sylius,pjedrzejewski/Sylius,GSadee/Sylius,antonioperic/Sylius,101medialab/Sylius,gorkalaucirica/Sylius,diimpp/Sylius,torinaki/Sylius,pjedrzejewski/Sylius,videni/Sylius,loic425/Sylius,Brille24/Sylius,Joypricecorp/Sylius,Sylius/Sylius,NeverResponse/Sylius,SyliusBot/Sylius,diimpp/Sylius,gorkalaucirica/Sylius,videni/Sylius,lchrusciel/Sylius,foobarflies/Sylius,pamil/Sylius,Joypricecorp/Sylius,foobarflies/Sylius,venyii/Sylius,pjedrzejewski/Sylius,ezecosystem/Sylius,torinaki/Sylius,SyliusBot/Sylius,itinance/Sylius,venyii/Sylius,kayue/Sylius,Zales0123/Sylius,pamil/Sylius,bitbager/Sylius,videni/Sylius,lchrusciel/Sylius,foobarflies/Sylius,kayue/Sylius,venyii/Sylius,lchrusciel/Sylius,loic425/Sylius,vihuvac/Sylius,loic425/Sylius,ezecosystem/Sylius,ezecosystem/Sylius