Add Symfony 6 compatibility, removing unneeded compatibilities (#74)

* Drop php<=8.0 support, add php>=8.1 support

* Drop symfony 4 support, add symfony 6 support

* Remove useless @return annotation

.github/workflows/main.yaml

@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        php-versions: ['8.0', '8.1']
+        php-versions: ['8.1', '8.2', '8.3']
     name: PHP ${{ matrix.php-versions }}
     steps:
       -   uses: actions/checkout@v2

composer.json

@@ -4,11 +4,11 @@
     "description": "Installer for all the Hostnet Doctrine entity libraries",
     "license":     "MIT",
     "require": {
-        "php":                         "^8.0",
+        "php":                         "^8.1",
         "composer-plugin-api":         "^2.0.0",
         "doctrine/annotations":        "^1.13.2",
         "phpdocumentor/type-resolver": "^1.4.0",
-        "symfony/filesystem":          "^4.4||^5.0",
+        "symfony/filesystem":          "^5.4||^6.0",
         "twig/twig":                   "^3.0"
     },
     "require-dev": {

src/ReflectionMethod.php

@@ -37,9 +37,6 @@ public function getName(): string
         return $this->method->getName();
     }
 
-    /**
-     * @return array
-     */
     public function getParameters(): array
     {
         return array_map(