update code to work with Symfony 5

Author: MasaakiYoshida

src/DependencyInjection/Configuration.php

@@ -22,8 +22,8 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $treeBuilder->root('phpmentors_composite_password_authentication');
+        $treeBuilder = new TreeBuilder('phpmentors_composite_password_authentication');
+        $treeBuilder->getRootNode();
 
         return $treeBuilder;
     }

src/DependencyInjection/Security/Factory/FormLoginCompositePasswordFactory.php

@@ -13,6 +13,7 @@
 namespace PHPMentors\CompositePasswordAuthenticationBundle\DependencyInjection\Security\Factory;
 
 use Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory\FormLoginFactory;
+use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 use Symfony\Component\DependencyInjection\Reference;
@@ -22,19 +23,19 @@ class FormLoginCompositePasswordFactory extends FormLoginFactory
     /**
      * {@inheritdoc}
      */
-    public function getKey()
+    public function getKey(): string
     {
         return 'form-login-composite-password';
     }
 
     /**
      * {@inheritdoc}
      */
-    protected function createAuthProvider(ContainerBuilder $container, $id, $config, $userProviderId)
+    protected function createAuthProvider(ContainerBuilder $container, string $id, array $config, string $userProviderId): string
     {
         $provider = 'phpmentors_composite_password_authentication.composite_password_dao_authentication_provider.'.$id;
         $container
-            ->setDefinition($provider, new DefinitionDecorator('phpmentors_composite_password_authentication.composite_password_dao_authentication_provider'))
+            ->setDefinition($provider, new ChildDefinition('phpmentors_composite_password_authentication.composite_password_dao_authentication_provider'))
             ->replaceArgument(0, new Reference($userProviderId))
             ->replaceArgument(1, new Reference('security.user_checker.'.$id))
             ->replaceArgument(2, $id)