README.md in tgbot-0.3.2 vs README.md in tgbot-0.4.6

- old
+ new

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 # Tgbot
 
 [![Gem Version](https://badge.fury.io/rb/tgbot.svg)](https://badge.fury.io/rb/tgbot)
-![Bot API Version](https://img.shields.io/badge/Bot%20API-4.7-blue.svg?style=flat-square)
-![](https://img.shields.io/badge/License-MIT-lightgrey.svg?style=flat-square)
+![Bot API Version](https://img.shields.io/badge/Bot%20API-6.6-blue.svg?style=flat-square)
+![](https://img.shields.io/badge/License-MIT-lightblue.svg?style=flat-square)
 
 A tiny but easy-to-use wrapper of [Telegram Bot API](https://core.telegram.org/bots/api).
 
 ## Install
 