Do not upgrade to cairo 1.12 on travis
Do not upgrade to cairo 1.12 on travis

prepare/TestWeasyPrint,andrewleech/WeasyPrint,marclaporte/WeasyPrint,prepare/TestWeasyPrint,Kozea/WeasyPrint,jasco/WeasyPrint,andrewleech/WeasyPrint,Kozea/WeasyPrint,jasco/WeasyPrint,marclaporte/WeasyPrint