title: Adding a 'enum' MySQL field type with Phinx Migrate
body: <p>I'm trying to create a migration in Phinx (actually a rollback) which will create a enum type field in a MySQL DB. Having read the <a href="http://docs.phinx.org/en/latest/migrations.html#id1" rel="noreferrer">docs</a> I was under the impression that this should be pretty simple but it just fails every time.</p>
  
  <pre><code>$table = $this-&gt;table('mytable');
  $table-&gt;addColumn('warmth','enum', array('limit' =&gt; array('1', '2', '3', '4', '5', 'P', 'A', 'B', 'C', 'D', 'X', 'N')))
  -&gt;save();
  </code></pre>
  
  <p>Unfortunately there's no easy way to have Phinx output the offending SQL query either.</p>