Updated all dependencies and prepared for PHP 8

classes/DI/DependencyInjector.php

@@ -14,7 +14,7 @@ use Psr\Http\Message\RequestInterface, Psr\Http\Message\ResponseInterface;
 use DI\ContainerBuilder;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Cache\FilesystemCache;
-use Slim\Http\Response;
+use Slim\Psr7\Response;
 use Symfony\Component\Mailer\MailerInterface,
     Symfony\Component\Mailer\Transport, Symfony\Component\Mailer\Mailer;
 use CloudObjects\SDK\ObjectRetriever, CloudObjects\SDK\NodeReader, CloudObjects\SDK\COIDParser;

classes/DI/SandboxedContainer.php

@@ -20,7 +20,7 @@ class SandboxedContainer implements ContainerInterface {
         $this->container = $container;
     }
 
-    public function has($id) {
+    public function has($id) : bool {
         return $this->container->has($id);
     }
 

classes/DI/WhitelistReflectionBasedAutowiring.php

@@ -16,7 +16,7 @@ use DI\Definition\Source\DefinitionSource, DI\Definition\Source\Autowiring,
  */
 class WhitelistReflectionBasedAutowiring extends ReflectionBasedAutowiring implements DefinitionSource, Autowiring {
 
-    public function autowire(string $name, ObjectDefinition $definition = null) {
+    public function autowire(string $name, ?ObjectDefinition $definition = null) : ?ObjectDefinition {
         return isset($definition) ? parent::autowire($name, $definition) : null;
     }