Fixed command interfaces

classes/Commands/ClassTestEnvCommand.php

@@ -10,6 +10,7 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Command\Command;
 use ML\IRI\IRI;
 use Guzzle\Http\Exception\BadResponseException;
 use CloudObjects\SDK\COIDParser;
@@ -55,7 +56,7 @@ class ClassTestEnvCommand extends AbstractObjectCommand {
         }
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output) {
+    protected function execute(InputInterface $input, OutputInterface $output): int {
         $this->requireCloudObjectsCLI();
 
         $container = $this->getContainer();
@@ -93,6 +94,7 @@ class ClassTestEnvCommand extends AbstractObjectCommand {
                 $cmd->upload($output);
             });
         }
+        return Command::SUCCESS;
     }
 
 }