Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools. This update was made based on information from https://repology.org/metapackage/itk/versions. 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 4.13.0 with grep in /nix/store/9dfpbhp02y597y9zw3xvdcjsb8w3gqjv-itk-4.13.0 - directory tree listing: https://gist.github.com/4a6da5cc90a5718caa480eba957def8f