title: Adding a 'varbinary' MySQL field type with Phinx Migrate
body: <p>I'm trying to create a migration in Phinx which will create a varbinary type field in a MySQL DB to store an ip_address.</p>
  
  <p>This is what I have:</p>
  
  <pre><code>$table = $this-&gt;table('my_table');
  $table-&gt;addColumn('ip_address', 'varbinary', ['after' =&gt; 'id', 'limit' =&gt; 16])
  -&gt;save();
  </code></pre>
  
  <p>However this simply returns:</p>
  
  <blockquote>
    <p>[InvalidArgumentException]<br>
    An invalid column type "varbinary" was specified for column
    "ip_address".</p>
  </blockquote>
  
  <p>I tried using 'binary' but this just ended up as a BLOB. :/</p>