title: Set strict sql mode in peewee
body: <p>I'd like to force ENUM constraints in my mySQL database. To do that, it is suggested I use "strict" sql mode. In an interactive prompt, this can be set with one of:</p>
  
  <pre><code>SET GLOBAL sql_mode = 'STRICT_ALL_TABLES';
  SET SESSION sql_mode = 'STRICT_ALL_TABLES';
  </code></pre>
  
  <p>Or at server startup with:</p>
  
  <pre><code> --sql-mode="STRICT_ALL_TABLES"
  </code></pre>
  
  <p>Or in <code>my.cnf</code> as:</p>
  
  <pre><code>sql-mode="STRICT_ALL_TABLES"
  </code></pre>
  
  <p>Is there a way to do such a thing in <code>peewee</code>? Perhaps by extending the <code>Database</code> class? Or injecting raw sql in queries?</p>