title: Composer - show possible updates for dependencies (like bower list)
body: <p>Can't find in Composer documentation how to check all dependencies for new versions. In bower there's <code>bower list</code>:</p>
  
  <p><a href="https://i.stack.imgur.com/J4krU.png" rel="noreferrer"><img src="https://i.stack.imgur.com/J4krU.png" alt="enter image description here"></a></p>
  
  <p>Any alternative in Composer to achieve this?</p>