fix: import in change stream unit tests

Author: baileympearson

test/unit/change_stream.test.ts

@@ -2,7 +2,7 @@ import { Long, Timestamp } from 'bson';
 import { expect } from 'chai';
 import * as sinon from 'sinon';
 
-import { ChangeStreamCursor } from '../../src/change_stream';
+import { ChangeStreamCursor } from '../../src/cursor/change_stream_cursor';
 import { MongoClient } from '../../src/mongo_client';
 import { MongoDBNamespace } from '../../src/utils';