Updated semver info

Author: Aman-Aalam

lib/PaymentRails/Version.php

@@ -11,8 +11,8 @@ class Version
      * class constants
      */
     const MAJOR = 2;
-    const MINOR = 2;
-    const TINY = 0;
+    const MINOR = 1;
+    const TINY = 4;
 
     /**
      * @ignore