Fix. Tests. Psalm notice fixed.

Author: Glomberg

cleantalk-antispam.php

@@ -5,4 +5,4 @@
 require_once "lib/CleantalkRequest.php";
 require_once "lib/CleantalkResponse.php";
 require_once "lib/CleantalkAntispam.php";
-require_once "lib/CleantalkApi.php";
+require_once "lib/CleantalkAPI.php";