1.2.0

• update API version to 2.8 (#22)
• add API for Messenger Code (#23)
• add API for Messenger Insights (#24)
• add API for Messenger Profile (#27)
• add methods message(), action(), and attachment() to Send API (#25)
• add method profile() to User API
• add methods subscribe() and challenge() to Webhook API
• deprecated classes Thread, ThreadSettings and all classes inside namespace Kerox\Messenger\Model\ThreadSettings (#27)
• deprecated methods sendMessage() and sendAction() from Send API
• deprecated method getProfile() from User API
• deprecated methods sendSubscribe() and getChalleng() from Webhook API
• replace itemUrl by defaultAction for WebUrl button (#40)
• add method setWebviewSahreButton() to WebUrl button (#40)
• update Share button to handle Generic template
• update README
• update tests