Prepare Release v2.2.2

Author: LKaemmerling

src/HetznerAPIClient.php

@@ -22,7 +22,7 @@ class HetznerAPIClient
     /**
      * Version of the API Client.
      */
-    const VERSION = '2.2.1';
+    const VERSION = '2.2.2';
 
     const MAX_ENTITIES_PER_PAGE = 50;