chore: change README and CHANGELOG texts

Author: bereznii

CHANGELOG.md

@@ -4,10 +4,10 @@ All notable changes to `php-teams-connector` will be documented in this file.
 
 Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
-## NEXT - YYYY-MM-DD
+## v1.0 - 2020-08-04
 
 ### Added
-- Nothing
+- Everything
 
 ### Deprecated
 - Nothing

README.md

@@ -1,9 +1,7 @@
 # php-teams-connector
 
-[![Latest Version on Packagist][ico-version]][link-packagist]
+[![Latest Version on Packagist][ico-version]](https://packagist.org/packages/bereznii/php-teams-connector)
 [![Software License][ico-license]](LICENSE.md)
-[![Quality Score][ico-code-quality]][link-code-quality]
-[![Total Downloads][ico-downloads]][link-downloads]
 
 The PHP package to easily interact with Microsoft Teams Connector API via Incoming Webhook.
 The goal is to provide user with ability to easily create his own message card and send them to desired channel.