Update README.md

Author: xdevor

README.md

@@ -2,6 +2,13 @@
 
 A parser that can parse the composer.json file of installed PHP packages.
 
+<p align="left">
+    <a href="https://github.com/xdevor/composer-parser/actions"><img src="https://github.com/xdevor/composer-parser/actions/workflows/tests.yml/badge.svg" alt="Test Status"></a>
+    <a href="https://packagist.org/packages/xdevor/composer-parser"><img src="https://poser.pugx.org/xdevor/composer-parser/d/total.svg" alt="Total Downloads"></a>
+    <a href="https://packagist.org/packages/xdevor/composer-parser"><img src="https://poser.pugx.org/xdevor/composer-parser/v/stable.svg" alt="Latest Stable Version"></a>
+    <a href="https://packagist.org/packages/xdevor/composer-parser"><img src="https://poser.pugx.org/xdevor/composer-parser/license.svg" alt="License"></a>
+</p>
+
 ## Installation
 Require this package with composer:
 ```bash
@@ -20,6 +27,18 @@ use Xdevor\ComposerParser\Parser;
 (new Parser())->parse('the/package', 'authors.0.name'); // return the first author name
 ```
 
+## Contributing
+
+Please see [CONTRIBUTING](CONTRIBUTING.md) for details.
+
+## Code of Conduct
+
+In order to ensure that the Laravel community is welcoming to all, please review and abide by the [Code of Conduct](CODE_OF_CONDUCT.md).
+
+## Security Vulnerabilities
+
+Please review [our security policy](SECURITY.md) on how to report security vulnerabilities.
+
 ## License
 
 ComposerParser is open-sourced software licensed under the [MIT license](LICENSE.md).