PHP 5.6.11 tokenizer is missing
<p>When running <code>composer install</code> I get the following error:</p>

<pre><code>- phpunit/php-token-stream 1.4.8 requires ext-tokenizer * -&gt; the requested PHP extension tokenizer is missing from your system.
</code></pre>

<p>I am using PHP <code>5.6.11</code>.</p>