Semi-automatic update. These checks were done:
- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 4.5.0 with grep in /nix/store/9xvi5jsdbiphz2w704njd975xkv31y8g-google-play-music-desktop-player-4.5.0
- found 4.5.0 in filename of file in /nix/store/9xvi5jsdbiphz2w704njd975xkv31y8g-google-play-music-desktop-player-4.5.0
