apply PSR-12 rules

Tests/Request/AbstractRequest.php

@@ -13,7 +13,7 @@
  * @link          http://www.oxidmodule.com
  */
 
-declare( strict_types = 1 );
+declare(strict_types=1);
 
 namespace D3\LinkmobilityClient\Tests\Request;
 
@@ -554,4 +554,4 @@ abstract class AbstractRequest extends ApiTestCase
 
         $this->checkGetterSetter($clientMock, 'setClient', 'getClient');
     }
-}
+}