Tested on iTerm2.app and Terminal.app on OSX Catalina.

I couldn't get they arrow keys (Clang++ std=c++2a) using rlutil::getKey().
Multiple ANSI character sequences don't get handled properly because cnt variable is 0 and the ^[[A sequence in my game loop is split in multiple calls of rlutil::getKey()

As a result I never get rlutil::getKey() to equal rlutil::KEY_UP