rtaudio: 4.1.2 -> 5.0.0

Semi-automatic update. These checks were performed:

- built on NixOS
- found 5.0.0 with grep in /nix/store/sxxwa9mma9933vxb4w3d2szxjqx5w773-rtaudio-5.0.0
- found 5.0.0 in filename of file in /nix/store/sxxwa9mma9933vxb4w3d2szxjqx5w773-rtaudio-5.0.0

cc "@magnetophon"