TTS/STT languages and voices for each provider (#281)

* wip

* wip

* wip

* wip

* wip

* wip

* add testcase

lib/utils/speech-data/stt-aws.js

@@ -0,0 +1,10 @@
+module.exports = [
+  { name: 'Australian English', value: 'en-AU' },
+  { name: 'British English', value: 'en-GB' },
+  { name: 'US English', value: 'en-US' },
+  { name: 'French', value: 'fr-FR' },
+  { name: 'Canadian French', value: 'fr-CA' },
+  { name: 'German', value: 'de-DE' },
+  { name: 'Italian', value: 'it-IT' },
+  { name: 'US Spanish', value: 'es-US' },
+];