fix undeclared var

Author: brandonmwest

lib/main.js

@@ -10,6 +10,7 @@ const eventStreamMarshaller = new marshaller.EventStreamMarshaller(util_utf8_nod
 
 // our global variables for managing state
 let languageCode;
+let region;
 let sampleRate;
 let transcription = "";
 let socket;