Updated test case to include activity_timeout in the environment de…

…finition. Using `30` as the default value as this was the original value in the package.

tests/ReverbTestCase.php

@@ -53,6 +53,7 @@ protected function defineEnvironment($app): void
             'capacity' => null,
             'allowed_origins' => ['*'],
             'ping_interval' => 10,
+            'activity_timeout' => 30,
             'max_message_size' => 1_000_000,
         ]);
 
@@ -63,6 +64,7 @@ protected function defineEnvironment($app): void
             'capacity' => null,
             'allowed_origins' => ['laravel.com'],
             'ping_interval' => 10,
+            'activity_timeout' => 30,
             'max_message_size' => 1,
         ]);
     }