Bump to v3.2.1.

Whoops.. I forgot to do this before v3.2.1 was tagged. My bad. o.0

Anyway, it won't break anything, and I'll release the next version soon
enough, moving the version again at that time.

Author: Maikuolan

src/Loader.php

@@ -88,7 +88,7 @@ class Loader
     /**
      * @var string phpMussel version number (SemVer).
      */
-    public $ScriptVersion = '3.2.0';
+    public $ScriptVersion = '3.2.1';
 
     /**
      * @var string phpMussel version identifier (complete notation).