Bump version.

extra/simplesamlphp.spec

 %define name      simplesamlphp
 %define summary   SAML IDP/SP written in PHP
-%define version   1.17.2
+%define version   1.17.3
 %define release   1
 %define license   LGPL 2.1
 %define group     Networking/WWW

lib/SimpleSAML/Configuration.php

@@ -419,7 +419,7 @@ class Configuration implements Utils\ClearableState
      */
     public function getVersion()
     {
-        return '1.17.2';
+        return '1.17.3';
     }