title: Laravel installer keeps installing 5.5 instead of 5.6
body: <p>I installed php 7.2.2  / apache 2.4 and mysql-5.7 on windows 10.</p>
  
  <p>I want to install laravel 5.6</p>
  
  <p>first:</p>
  
  <pre><code>1.  composer clear-cache
  2.  composer update
  3.  composer global require "laravel/installer"
  </code></pre>
  
  <p>php -v:</p>
  
  <pre><code>PHP 7.2.2 (cli) (built: Jan 31 2018 19:31:17) ( ZTS MSVC15 (Visual C++ 2017) x64 )
  Copyright (c) 1997-2018 The PHP Group
  Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
  </code></pre>
  
  <p>and <code>Laravel Installer 2.0.1</code></p>
  
  <p>I try this (according to the laravel doc 5.6):</p>
  
  <pre><code>composer create-project --prefer-dist laravel/laravel blog
  </code></pre>
  
  <p>But it install laravel 5.5.28</p>
  
  <p>Why does composer keep installing laravel 5.5?</p>