Update types.go (#244)

Add missing field

Author: triadev

types.go

@@ -495,11 +495,12 @@ type (
 
 	// ErrorResponseDetail struct
 	ErrorResponseDetail struct {
-		Field   string `json:"field"`
-		Issue   string `json:"issue"`
-		Name    string `json:"name"`
-		Message string `json:"message"`
-		Links   []Link `json:"link"`
+		Field   	string `json:"field"`
+		Issue   	string `json:"issue"`
+		Name    	string `json:"name"`
+		Message 	string `json:"message"`
+		Description 	string `json:"description"`
+		Links   	[]Link `json:"link"`
 	}
 
 	// ErrorResponse https://developer.paypal.com/docs/api/errors/