chore: change api url to api.lexware.io (#168)

Author: Sysix

src/Api.php

@@ -35,7 +35,7 @@
 
 class Api implements ApiInterface
 {
-    public string $apiUrl = 'https://api.lexoffice.io';
+    public string $apiUrl = 'https://api.lexware.io';
 
     protected string $apiVersion = 'v1';
 

tests/ApiTest.php

@@ -69,7 +69,7 @@ public function testApiUrl(): void
             new Response(200, [], 'post-content')
         );
 
-        $this->assertStringStartsWith('api.lexoffice.io', $stub->getRequest()->getUri()->getHost());
+        $this->assertStringStartsWith('api.lexware.io', $stub->getRequest()->getUri()->getHost());
 
         $stub->apiUrl = 'https://test.de';
         $stub->newRequest('POST', 'post-content');