title: Nestjs memory leak encounter in version 6.10.11
body: <p>I upgraded my nestjs project from v6.0.0 to v6.10.11, since then the service's memory consumption increase till it gets to the limit and then the service crashes.
  I downgrade back to 6.0.0 and the memory issue stopped.</p>
  
  <p>My docker run with node version 12.4.0 on AWS.</p>
  
  <p>Did anyone encounter this problem?</p>
  
  <p>Thanks in advance.</p>
  
  <h2>UPDATE</h2>
  
  <p>The issue reproduced in the flowing flow:
  I have an Auth service which is decorated with request scope (meaning it is created within each request), this service has a logger service injected to the constructor, the logger service is not scoped. 
  as soon as I remove the injection of the logger service the leak vanishes. </p>
  
  <ul>
  <li>still, in 6.10.0 it didn't happen.</li>
  </ul>
  
  <p>** Auth service should be scoped since I need the authentication token from the request's header. this token I used for other REST calls, is there any other option to do that?</p>