[CHA-0] changed filter conditions to filter (#217)

* changed filter conditions to filter

* updated testcases

* removed unwanted changes

* fixed linting

Author: nijeesh-stream

src/main/java/io/getstream/chat/java/models/Reminder.java

@@ -161,7 +161,7 @@ public static class ReminderQueryRequestData {
 
     @Singular
     @Nullable
-    @JsonProperty("filter_conditions")
+    @JsonProperty("filter")
     private Map<String, Object> filterConditions;
 
     @Singular

src/test/java/io/getstream/chat/java/ReminderTest.java

@@ -167,8 +167,8 @@ void whenQueryingRemindersWithFilterConditions_thenNoException() {
 
     // Verify the query returned results
     Assertions.assertNotNull(reminders);
-    // Note: The API might not return any reminders if they were deleted or not indexed yet
-    // So we don't assert that the list is not empty
+    Assertions.assertEquals(1, reminders.size());
+    Assertions.assertEquals(message.getId(), reminders.get(0).getMessageId());
 
     // Check for pagination fields
     Assertions.assertDoesNotThrow(