feat: adds 'single_utterance' to stream from file sample (#20)

* feat: adds streaming samples
* fix: updates package.json

Co-authored-by: Justin Beckwith <justin.beckwith@gmail.com>

media-translation/translate_from_file.js

@@ -47,6 +47,7 @@ function main(filename, encoding, sourceLanguage, targetLanguage) {
         sourceLanguageCode: sourceLanguage,
         targetLanguageCode: targetLanguage,
       },
+      single_utterance: true,
     };
 
     // First request needs to have only a streaming config, no data.