Prep for 1.2.0 release (#1276)

Author: michalsn

src/Auth.php

@@ -41,7 +41,7 @@ class Auth
     /**
      * The current version of CodeIgniter Shield
      */
-    public const SHIELD_VERSION = '1.1.0';
+    public const SHIELD_VERSION = '1.2.0';
 
     protected ?Authentication $authenticate = null;