Test Improvements (#1005)

fix following errors:

```
1) Laravel\Octane\Tests\ApplicationFactoryTest::test_application_can_be_created
* Test code or tested code did not remove its own error handlers

* Test code or tested code did not remove its own exception handlers

/home/runner/work/octane/octane/tests/ApplicationFactoryTest.php:9
```

Signed-off-by: Mior Muhammad Zaki <[email protected]>

Author: crynobone

tests/TestCase.php

@@ -4,6 +4,7 @@
 
 use Carbon\Laravel\ServiceProvider as CarbonServiceProvider;
 use Illuminate\Container\Container;
+use Illuminate\Foundation\Bootstrap\HandleExceptions;
 use Illuminate\Support\Facades\Facade;
 use Laravel\Octane\ApplicationFactory;
 use Laravel\Octane\Contracts\Client;
@@ -17,6 +18,7 @@
 use Swoole\Table;
 
 use function Orchestra\Testbench\default_skeleton_path;
+use function Orchestra\Testbench\laravel_version_compare;
 
 class TestCase extends BaseTestCase
 {
@@ -76,6 +78,12 @@ protected function tearDown(): void
     {
         parent::tearDown();
 
+        if (laravel_version_compare('11.0', '>=')) {
+            HandleExceptions::flushState();
+        } else {
+            HandleExceptions::forgetApp();
+        }
+
         Container::setInstance(null);
 
         Facade::clearResolvedInstances();