execute method
Implementation
Future<void> execute() async {
verifyArgs();
final inFile = argsResult['in'] as String;
final outFile = argsResult['out'] as String;
final fromLanguage = argsResult['from'] as String;
final toLanguage = argsResult['to'] as String;
final parser = JsonValueParser.file(File(inFile));
parser.parse();
final translate = await parser.translate(fromLanguage, toLanguage);
File(outFile).writeAsStringSync(translate);
}