`Hoa\Console\Window::getSize` relies on `tput`…

… when we have no choice. Actually, we start to call `tput`. If `tput`
does not return a valid answer, then we try the old algorithm by sending
a code to the terminal. But some of them, like tmux or screen, does not
support this code. The other solution is to call `ioctl` which is not
possible from PHP. That's all.