message: chore: fix deprecation warning in mongodb example
diff: @@ -6,6 +6,7 @@ let db;
  beforeAll(async () => {
  connection = await MongoClient.connect(global.__MONGO_URI__, {
  useNewUrlParser: true,
  + useUnifiedTopology: true,
  });
  db = await connection.db(global.__MONGO_DB_NAME__);
  });
  