Merge pull request #337 from skipperbent/v3

V3

src/Pecee/Http/Response.php

@@ -95,7 +95,7 @@ class Response
             throw new \InvalidArgumentException('Invalid type for parameter "value". Must be of type array or object implementing the \JsonSerializable interface.');
         }
 
-        $this->header('Content-type: application/json');
+        $this->header('Content-Type: application/json; charset=utf-8');
         echo json_encode($value, $options, $dept);
         exit(0);
     }