Merge pull request #56 from oele-code/master

Prevent Illegal string offset 'warning_queries'

Author: mpociot

src/Outputs/Json.php

@@ -16,6 +16,10 @@ public function output(Collection $detectedQueries, Response $response)
     {
         if ($response instanceof JsonResponse) {
             $data = $response->getData(true);
+            if (! is_array($data)){
+                $data = [ $data ];
+            }
+            
             $data['warning_queries'] = $detectedQueries;
             $response->setData($data);
         }