itstool: 2.0.2 -> 2.0.4

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- ran `/nix/store/pg0jpmczm1gb3rzp3qfnnjl0xfd48nqz-itstool-2.0.4/bin/itstool -h` got 0 exit code
- ran `/nix/store/pg0jpmczm1gb3rzp3qfnnjl0xfd48nqz-itstool-2.0.4/bin/itstool --help` got 0 exit code
- ran `/nix/store/pg0jpmczm1gb3rzp3qfnnjl0xfd48nqz-itstool-2.0.4/bin/itstool -v` and found version 2.0.4
- ran `/nix/store/pg0jpmczm1gb3rzp3qfnnjl0xfd48nqz-itstool-2.0.4/bin/itstool --version` and found version 2.0.4
- found 2.0.4 with grep in /nix/store/pg0jpmczm1gb3rzp3qfnnjl0xfd48nqz-itstool-2.0.4
- found 2.0.4 in filename of file in /nix/store/pg0jpmczm1gb3rzp3qfnnjl0xfd48nqz-itstool-2.0.4