new AmqpConnection() should NOT cause an error (#872)

* fix no args on new AmqpConnection

* Update connection.ts

* back to checking if config argument is undefined

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Co-authored-by: Acker Apple <y>
Co-authored-by: Rodrigo <[email protected]>

packages/rabbitmq/src/amqp/connection.ts

@@ -147,7 +147,7 @@ export class AmqpConnection {
     this.config = {
       deserializer: (message) => JSON.parse(message.toString()),
       serializer: (value) => Buffer.from(JSON.stringify(value)),
-      logger: config.logger || new Logger(AmqpConnection.name),
+      logger: config?.logger || new Logger(AmqpConnection.name),
       ...defaultConfig,
       ...config,
     };