added invoice model to invoice created event (#3079)

* added model to InvoiceCreatedEvent
* allow to switch formatter locale

tests/EventSubscriber/Actions/InvoiceSubscriberTest.php

@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\EventSubscriber\Actions;
+
+use App\EventSubscriber\Actions\InvoiceSubscriber;
+
+/**
+ * @covers \App\EventSubscriber\Actions\InvoiceSubscriber
+ */
+class InvoiceSubscriberTest extends AbstractActionsSubscriberTest
+{
+    public function testEventName()
+    {
+        $this->assertGetSubscribedEvent(InvoiceSubscriber::class, 'invoice');
+    }
+}