Add Packagist

README.md

@@ -5,15 +5,7 @@ This package provides [September First](https://api.1sept.ru) integration for [O
 
 ## Installation
 
-Add to `composer.json`:
+Just execute:
-```
-"repositories": [{
-    "type": "vcs",
-    "url": "https://github.com/1sept/oauth2-1sept"
-}],
-```
-
-Then execute:
 ```sh
 composer require 1sept/oauth2-1sept
 ```