Updated PHPStan to latest version

Added rector to allow fixing common linting issues

Author: Grotax

composer.json

@@ -32,9 +32,10 @@
     "require-dev": {
         "phpunit/phpunit": "~9.3.0",
         "monolog/monolog": "1.*|2.*",
-        "phpstan/phpstan": "^0.12.81",
+        "phpstan/phpstan": "^2.1.22",
         "friendsofphp/php-cs-fixer": "^3.5",
-        "php-http/mock-client": "^1.5"
+        "php-http/mock-client": "^1.5",
+        "rector/rector": "^2.1"
     },
     "suggest": {
         "monolog/monolog": "Allows to handle logs",