fix: filter any 'no' RSVPs from the attendees

tests/FakeEventRepository.php

@@ -10,11 +10,15 @@ use Tightenco\Collect\Support\Collection;
 final class FakeEventRepository implements EventRepository
 {
     public function getConfirmedAttendees(): Collection {
-        return Collection::make([
+        $rsvps = Collection::make([
             ['name' => 'matthew s.', 'response' => 'yes'],
             ['name' => 'Michael P.', 'response' => 'yes'],
             ['name' => 'Kathryn "Kat" R.', 'response' => 'yes'],
             ['name' => 'Did not attend', 'response' => 'no'],
         ]);
+
+        return $rsvps
+            ->filter(fn (array $attendee): bool => $attendee['response'] == 'yes')
+            ;
     }
 }