Bump version to 0.1.8

Db::insert() was called with add_prefix=false, causing it to target
'simple_withdrawal_request' instead of '{prefix}simple_withdrawal_request'.
Dropping the explicit false restores the default (true).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

simple_withdrawalbutton.php

@@ -27,7 +27,7 @@ class Simple_withdrawalbutton extends Module
     {
         $this->name = 'simple_withdrawalbutton';
         $this->tab = 'administration';
-        $this->version = '0.1.7';
+        $this->version = '0.1.8';
         $this->author = 'Arne Weiss';
         $this->need_instance = 0;
         $this->bootstrap = true;
@@ -464,7 +464,7 @@ class Simple_withdrawalbutton extends Module
             'user_agent_hash' => $userAgentHash ?: null,
         ];
 
-        $ok = Db::getInstance()->insert(self::TABLE_REQUEST, $insert, false, true, Db::INSERT, false);
+        $ok = Db::getInstance()->insert(self::TABLE_REQUEST, $insert, false, true, Db::INSERT);
         if (!$ok) {
             return false;
         }