Add lunch options

Change-Id: Ic4569fce73d8b33f5084e95d44797cba735914d5
diff --git a/User.php b/User.php
index 6a9e2cf..642e894 100644
--- a/User.php
+++ b/User.php
@@ -27,6 +27,9 @@
     public bool $conference_dinner;
     public $registered_at;
     public bool $earlybird_registration;
+    public $lunch_day_1;
+    public $lunch_day_2;
+    public $lunch_day_3;
     public float $total_due;
     public $invoice;