remove support for 0.8 in travis-ci
remove support for 0.8 in travis-ci

eddywashere/doxx,FGRibreau/doxx,iwatakeshi/mr-doc,tes/mr-doc,eddywashere/doxx,tes/mr-doc,japboy/mr-doc,tes/mr-doc,iwatakeshi/mr-doc,mr-doc/mr-doc,FGRibreau/doxx,japboy/mr-doc,mr-doc/mr-doc,eddywashere/doxx,japboy/mr-doc