test(MailChannelTest): add throws method in test

- Add throws method in test function in MailChannelTest.php
- Update the throws method in ExceptionNotifyManagerTest.php

Author: guanguans

tests/Channels/MailChannelTest.php

@@ -17,4 +17,4 @@
     expect($this->app->make(ExceptionNotifyManager::class)->driver('mail'))
         ->report('report')
         ->toBeNull();
-})->group(__DIR__, __FILE__);
+})->group(__DIR__, __FILE__)->throws(Swift_TransportException::class);

tests/ExceptionNotifyManagerTest.php

@@ -99,10 +99,8 @@
 })->group(__DIR__, __FILE__)->throws(\Guanguans\LaravelExceptionNotify\Exceptions\InvalidArgumentException::class);
 
 it('can create custom driver', function (): void {
-    app(ExceptionNotifyManager::class)->extend('foo', function () {
-        return new class implements Channel {
-            public function report(string $report): void {}
-        };
+    app(ExceptionNotifyManager::class)->extend('foo', static fn (): Channel => new class implements Channel {
+        public function report(string $report): void {}
     });
 
     expect(app(ExceptionNotifyManager::class))->driver('foo')->toBeInstanceOf(Channel::class);