title: How to update sylius/standard
body: <p>I have installed sylius with</p>
  
  <pre><code>composer create-project -s dev sylius/sylius
  cd sylius
  app/console sylius:install
  </code></pre>
  
  <p>I have added my own Bundle which extends SyliusWebBundle and some other things. Of course I have change parameters.yml etc.</p>
  
  <p>How can I update parts of Sylius? Vendors are updated via composer update, but what about SyliusBundles in src folder?</p>