title: How to update package cache when using module package from ansible
body: <p>If I run apt, I can update the package cache:</p>
  
  <pre><code>apt:
    name: postgresql
    state: present
    update_cache: yes
  </code></pre>
  
  <p>I'm now trying to use the generic <code>package</code> command, but I don't see a way to do this. </p>
  
  <pre><code>package:
    name: postgresql
    state: present
  </code></pre>
  
  <p>Do I have to run an explicit command to run <code>apt-get update</code>, or can I do this using the package module? </p>