Update version to plugin header

Author: k1sul1

wp-libre-form.php

@@ -3,7 +3,7 @@
  * Plugin name: WP Libre Form
  * Plugin URI: https://github.com/hencca/wp-libre-form
  * Description: A minimal HTML form builder for WordPress; made for developers
- * Version: 1.4.3
+ * Version: 1.5.0
  * Author: @anttiviljami
  * Author URI: https://github.com/anttiviljami/
  * License: GPLv3