title: Truncate all tables before running seed files with Phinx
body: <p>So, I have been creating migrations using Phinx. I want to be able to truncate all the tables(148 tables) before running the seed files. I am thinking about just creating a seed file that will be ran first and then it will truncate all the tables. The catch is that I don't want to have to ever change this file if we add more tables. How would I go about doing this. Maybe doing a Show tables and then looping through them, but not exactly sure how to do that. Any help would be great! This is what I have so far.</p>
  
  <pre><code>&lt;?php
  use Phinx\Seed\AbstractSeed;
  class BonusRuleTypesSeeder extends AbstractSeed
  {
      public function run()
      {
          $this-&gt;execute('SET foreign_key_checks=0');
          // some code here
          $this-&gt;execute('SET foreign_key_checks=1');
      }
  }
  </code></pre>