README.md in dingtalk-robot-0.2.0 vs README.md in dingtalk-robot-0.2.1

- old
+ new

@@ -4,9 +4,17 @@
 
 [![Gem Version](https://badge.fury.io/rb/dingtalk-robot.svg)](https://rubygems.org/gems/dingtalk-robot)
 [![Build Status](https://travis-ci.org/pinewong/dingtalk-robot.svg)](https://travis-ci.org/pinewong/dingtalk-robot)
 [![Test Coverage](https://codecov.io/github/pinewong/dingtalk-robot/coverage.svg?branch=master)](https://codecov.io/github/pinewong/dingtalk-robot?branch=master)
 
+## Supported Type
+
+- [x] Text
+- [x] Markdown
+- [x] ActionCard
+- [x] FeedCard
+- [ ] Link
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby