Install: Set version to 1.11.18 dev in version.php

main/install/version.php

@@ -13,8 +13,8 @@
 /**
  * Variables used from the main/install/index.php.
  */
-$new_version = '1.11.16';
-$new_version_status = 'stable';
+$new_version = '1.11.18';
+$new_version_status = 'dev';
 $new_version_last_id = 0;
 $new_version_stable = true;
 $new_version_major = false;