cognigy: when use azuyre tts, request detailed output format

lib/tasks/cognigy.js

@@ -126,7 +126,8 @@ class Cognigy extends Task {
     const opts = {
       recognizer: this.data.recognizer || {
         vendor: 'default',
-        language: 'default'
+        language: 'default',
+        outputFormat: 'detailed'
       }
     };
     this.logger.debug({opts}, 'constructing a nested transcribe object');

lib/tasks/transcribe.js

@@ -216,12 +216,18 @@ class TaskTranscribe extends Task {
     if ('aws' === this.vendor && Array.isArray(evt) && evt.length > 0) evt = evt[0];
     if ('microsoft' === this.vendor) {
       const nbest = evt.NBest;
-      const alternatives = nbest.map((n) => {
+      const alternatives = nbest ? nbest.map((n) => {
         return {
           confidence: n.Confidence,
           transcript: n.Display
         };
-      });
+      }) :
+        [
+          {
+            transcript: evt.DisplayText
+          }
+        ];
+
       const newEvent = {
         is_final: evt.RecognitionStatus === 'Success',
         alternatives