title: Assortment Bundle install in symfony 2.2.1
body: <p>I want to install assortment bundle in symfony 2.2.1.
  I added
  "sylius/assortment-bundle" : "*" in composer.json</p>
  
  <p>and run 
  composer  require sylius/assortment-bundle:*</p>
  
  <p>but showig error:</p>
  
  <p>The requested package sylius/assortment-bundle could not be found in any version, there may be a typo in the package name.
  blem 2</p>