group response edited

Group response is giving an array of objects. But there is only one object returned. function is now return first key in array as object

src/KiyohApi.php

@@ -27,7 +27,7 @@ function __construct(string $baseUrl, string $apiKey) {
      */
     public function getGroupStatistics() {
         $fullUrl = 'https://'.$this->baseUrl.'/v1/publication/review/external/group/statistics';
-        return $this->apiCall($fullUrl);
+        return $this->apiCall($fullUrl)[0];
     }
 
     /**