[CHA-0] Fix QueryReminders to properly encode empty filter as JSON object (#152)

* feat: fixed filter param

* feat: updated test

* feat: Fix QueryReminders to cast empty filter array to object for proper JSON encoding

* feat: Remove trailing whitespace in queryReminders

Author: nijeesh-stream

lib/GetStream/StreamChat/Client.php

@@ -1721,8 +1721,10 @@ public function deleteReminder(string $messageId, string $userId): StreamRespons
      */
     public function queryReminders(string $userId, array $filterConditions = [], ?array $sort = null, array $options = []): StreamResponse
     {
+        $filter = !empty($filterConditions) ? $filterConditions : (object)[];
+
         $params = array_merge($options, [
-            'filter_conditions' => $filterConditions,
+            'filter' => $filter,
             'sort' => $sort ?? [['field' => 'remind_at', 'direction' => 1]],
             'user_id' => $userId
         ]);

tests/integration/ReminderTest.php

@@ -49,7 +49,8 @@ protected function setUp(): void
         $message = [
             'text' => 'This is a test message for reminders'
         ];
-        $response = $this->channel->sendMessage($message, $this->user['id']);
+        $response = $this->channel->sendMessage($message, $this->user['id']); // message id 1
+        $response = $this->channel->sendMessage($message, $this->user['id']); // message id 2
         $this->messageId = $response['message']['id'];
     }