tradcpp: 0.4 -> 0.5.2

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. 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 0.5.2 with grep in /nix/store/s2kanna6c53sqm590xv8598j075j1ikb-tradcpp-0.5.2
- found 0.5.2 in filename of file in /nix/store/s2kanna6c53sqm590xv8598j075j1ikb-tradcpp-0.5.2