Add displayText to postback action (#63)

candy02058912 · Hyunje Jun · commit ec867ca62be9 · 2018-03-14T18:55:35.000+09:00
diff --git a/lib/types.ts b/lib/types.ts
@@ -259,6 +259,7 @@ export type PostbackAction = {
   type: "postback";
   data: string;
   text?: string;
+  displayText?: string;
 };
 
 export type MessageAction = {
