Make amqqueue:target() opaque

Author: ansd

deps/rabbit/src/amqqueue.erl

@@ -132,7 +132,7 @@
          extra_bcc :: rabbit_misc:resource_name() | none
         }).
 
--type target() :: #queue_target{}.
+-opaque target() :: #queue_target{}.
 
 -type amqqueue() :: amqqueue_v2().
 -type amqqueue_v2() :: #amqqueue{