title: phpcs --standard=PHPCompatibility not working
body: <p>I've followed all the steps from the official git page for installing and configure PHPCompatibility for checking the compatibility of my code with PHP7 as described bellow:</p>
  
  <ol>
  <li>Installation of <code>PHP_CodeSniffer</code> using pear.</li>
  <li>Download and extraction of the most recent release (PHP 7.1 Sniffs - update 2016-12-14) on <a href="https://github.com/wimg/PHPCompatibility/releases" rel="noreferrer">https://github.com/wimg/PHPCompatibility/releases</a> to directory <code>/Applications/MAMP/bin/php/php7.0.12/lib/php/PHP/CodeSniffer/Standards/PHPCompatibility/</code></li>
  </ol>
  
  <p>After that I additionally did the following commands on terminal </p>
  
  <ol start="3">
  <li><p>Add PHPCompatibility to the standards </p>
  
  <p><code>$ phpcs --config-set installed_paths /Applications/MAMP/bin/php/php7.0.12/lib/php/PHP/CodeSniffer/Standards/PHPCompatibility/</code></p></li>
  <li><p>Test if the PHPCompatibility was added as a standard</p>
  
  <p><code>$ phpcs -i</code></p></li>
  </ol>
  
  <p>my output is:</p>
  
  <blockquote>
    <p>The installed coding standards are MySource, PEAR, PHPCompatibility, PHPCS, PSR1, PSR2, Squiz and Zend</p>
  </blockquote>
  
  <ol start="5">
  <li><p>Set testVersion to PHP 7</p>
  
  <p><code>$ phpcs --runtime-set testVersion 7.0 test.php</code> which correctly prints a report for test.php</p></li>
  </ol>
  
  <p>But When I try to set PHPCompatibility as a standard anything happens and the terminal jumps to a new line for typing the next command. </p>
  
  <pre><code>`$ phpcs --standard=PHPCompatibility test.php`
  `Natalis-MacBook-Air:bin natalisilverio$ `
  </code></pre>
  
  <p>Could anyone advise what I am missing or doing wrong while trying to set PHPCompatibility as my standard? I tested phpcs --standard=Zend and it works correctly. </p>
  
  <p>I am running MAMP 4.0.6 set to PHP 7.0.12
  Thank you very much </p>