code: function buildPlaceholderFindCommand(packageDir) {
    if (platform() === 'win32') {
      return {
        binary: 'findstr',
        args: ['/msi', `${materialVersionPlaceholderText} ${ngVersionPlaceholderText} ${versionPlaceholderText}`, `${packageDir}\\*`]
      };
    } else {
      return {
        binary: 'grep',
        args: ['-ril', `${materialVersionPlaceholderText}\\|${ngVersionPlaceholderText}\\|${versionPlaceholderText}`, packageDir]
      };
    }
  }
docs: Builds the command that will be executed to find all files containing version placeholders.