title: Ansible lint reports "Package installs should not use latest"
body: <p>I've finally started using Ansible Lint to ensure I'm up to date and not missing things and I've found it reporting a curious error/notice.  When I use <code>dnf</code> to install a package, I've been using <code>state: latest</code> as it's for a system bootstrapping process that I may run multiple times on the same instance, particularly during development.  I always want the latest package installed in this scenario however Ansible Lint is reporting:</p>
  
  <pre><code>Package installs should not use latest
  </code></pre>
  
  <p>While I'm confident that in my use case I'm ok, is this simply because in the interest of "idempotency" one would normally not want this behaviour?  Or is there another reason?  If they're always going to report this, then why even offer the <code>latest</code> status option?</p>