test/chan: getFilteredClone has more fields than the test thinks

The codebase shoves various things into channel objects to transmit them
for things like channel lists etc.

This however means that the type does contains the fields and needs
to export them.

We should clean up the events so that we can get rid of all that.
But for now, we adapt the test expectation to reality.

test/models/chan.ts

@@ -198,23 +198,26 @@ describe("Chan", function () {
 		it("should keep necessary properties", function () {
 			const chan = new Chan();
 
-			expect(chan.getFilteredClone())
-				.to.be.an("object")
-				.that.has.all.keys(
-					"firstUnread",
-					"highlight",
-					"id",
-					"key",
-					"messages",
-					"muted",
-					"totalMessages",
-					"name",
-					"state",
-					"topic",
-					"type",
-					"unread",
-					"users"
-				);
+			expect(chan.getFilteredClone()).to.be.an("object").that.has.all.keys(
+				"firstUnread",
+				"highlight",
+				"id",
+				"key",
+				"messages",
+				"muted",
+				"totalMessages",
+				"name",
+				"state",
+				"topic",
+				"type",
+				"unread",
+				"users",
+				// the following are there in special cases, need to fix the types
+				"num_users",
+				"special",
+				"closed",
+				"data"
+			);
 		});
 
 		it("should send only last message for non active channel", function () {