Revert "gorequest wasn't sending the request for validation"

This reverts commit 2ed2786f8e.

appstore/validator.go

@@ -99,15 +99,9 @@ func NewWithConfig(config Config) Client {
 // Verify sends receipts and gets validation result
 func (c *Client) Verify(req *IAPRequest) (IAPResponse, error) {
 	result := IAPResponse{}
-	obj, err_json := json.Marshal(req)
-	if err_json != nil {
-		return result, fmt.Errorf("%v", err_json)
-	}
-
 	res, body, errs := gorequest.New().
 		Post(c.URL).
-		Type("json").
-		SendString(string(obj)).
+		Send(req).
 		Timeout(c.TimeOut).
 		End()