Issue #72: Replaced deprecated method

phpstan.neon

@@ -9,3 +9,4 @@ parameters:
         - src
         - test
     treatPhpDocTypesAsCertain: false
+    reportUnmatchedIgnoredErrors: false

src/Swoole/Delegators/TCPServerDelegator.php

@@ -23,6 +23,7 @@
 use function array_shift;
 use function explode;
 use function ltrim;
+use function method_exists;
 use function str_starts_with;
 use function trim;
 
@@ -63,7 +64,13 @@
                 $commandClass    = $commandMap[$commandName];
                 $application     = new Application();
                 $commandInstance = $container->get($commandClass);
-                $application->add($commandInstance);
+                /** @phpstan-ignore function.alreadyNarrowedType */
+                if (method_exists($application, 'addCommand')) {
+                    $application->addCommand($commandInstance);
+                } else {
+                    /** @phpstan-ignore method.notFound */
+                    $application->add($commandInstance); // @codeCoverageIgnore
+                }
 
                 $parsedOptions = [];
                 foreach ($args as $arg) {