Fix rsvp btn (#64)

* Fix sold out button condition

* made BBQ event rsvp btn disable

* Made bbq event action btn disabled

* clean up

* Update

* update btn condition

src/lib/components/EventCard.svelte

@@ -58,7 +58,7 @@
           on:click={(e) => e.stopImmediatePropagation()}
           disabled={!isPastEvent ||
             $eventAnalyticsStore === undefined ||
-            ticketsLeft < 0 ||
+            ticketsLeft <= 0 ||
             event.id === 'recmVKh6OgGcv8itV'}
           class="rounded-full"
           href={event.joinLink ? event.joinLink : `/checkout/${event.id}`}>