ADD badges to README

README.md

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 # PHP Language Extensions (currently in BETA)
 
+[![PHP versions: 8.0 to 8.2](https://img.shields.io/badge/php-8.0|8.1|8.2-blue.svg)](https://packagist.org/packages/dave-liddament/php-language-extensions)
+[![Latest Stable Version](https://poser.pugx.org/dave-liddament/php-language-extensions/v/stable)](https://packagist.org/packages/dave-liddament/php-language-extensions)
+[![License](https://poser.pugx.org/dave-liddament/php-language-extensions/license)](https://github.com/DaveLiddament/php-language-extensions/blob/main/LICENSE.md)
+[![Total Downloads](https://poser.pugx.org/dave-liddament/php-language-extensions/downloads)](https://packagist.org/packages/dave-liddament/php-language-extensions/stats)
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+[![Continuous Integration](https://github.com/DaveLiddament/php-language-extensions/workflows/Full%20checks/badge.svg)](https://github.com/DaveLiddament/php-language-extensions/actions/workflows/full-checks.yml)
+[![Psalm level 1](https://img.shields.io/badge/Psalm-max%20level-brightgreen.svg)](https://github.com/DaveLiddament/php-language-extensions/blob/main/psalm.xml)
+[![PHPStan level 8](https://img.shields.io/badge/PHPStan-max%20level-brightgreen.svg)](https://github.com/DaveLiddament/php-language-extensions/blob/main/phpstan.neon)
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 This library provides attributes for extending the PHP language (e.g. adding `package` visibility).
 The intention, at least initially, is that these extra language features are enforced by static analysis tools (such as Psalm, PHPStan and, ideally, PhpStorm) and NOT at runtime.