由于以下问题，我们构建的travisci已损坏:Thefollowingpackageshaveunmetdependencies:clang-6.0:Depends:libjsoncpp0(>=0.6.0~rc2)butitisnotinstallableE:Unabletocorrectproblems,youhaveheldbrokenpackages.apt-get.diagnosticsapt-getinstallfailedsudoaptinstalllibjsoncpp0不起作用，因为libjsoncpp0不存在；我也试过sudoaptinstalllibjsoncpp-