Symfony 6 support

Author: asika32764

composer.json

@@ -9,11 +9,9 @@
         }
     ],
     "require": {
-        "php": ">=5.3.2",
-        "symfony/console": "~2.3 || ~3.0 || ~4.0 || ~5.0"
-    },
-    "require-dev": {
-        "phpunit/phpunit": "~4.8.36 || ~5.7 || ~6.4"
+        "php": ">=8.0.2",
+        "symfony/console": "~6.0",
+        "phpunit/phpunit": "^9.5"
     },
     "autoload": {
         "psr-4": {

src/CompletionCommand.php

@@ -43,7 +43,7 @@ protected function configure()
     /**
      * {@inheritdoc}
      */
-    public function getNativeDefinition()
+    public function getNativeDefinition(): InputDefinition
     {
         return $this->createDefinition();
     }