Apply fixes from StyleCI

Author: alexsoft

src/Exceptions/CouldNotSendNotification.php

@@ -2,8 +2,8 @@
 
 namespace NotificationChannels\Pushbullet\Exceptions;
 
-use GuzzleHttp\Exception\ClientException;
 use RuntimeException;
+use GuzzleHttp\Exception\ClientException;
 
 class CouldNotSendNotification extends RuntimeException
 {

src/PushbulletChannel.php

@@ -2,11 +2,9 @@
 
 namespace NotificationChannels\Pushbullet;
 
-use NotificationChannels\Pushbullet\Events\MessageWasSent;
-use NotificationChannels\Pushbullet\Events\SendingMessage;
 use Illuminate\Notifications\Notification;
-use NotificationChannels\Pushbullet\Targets\Device;
 use NotificationChannels\Pushbullet\Targets\Email;
+use NotificationChannels\Pushbullet\Targets\Device;
 use NotificationChannels\Pushbullet\Targets\Targetable;
 
 class PushbulletChannel