title: How to prevent enter key triggering submit
body: <p>I am using <code>Formik</code> for a little form in a <code>React</code> app.</p>
  
  <p>The method <code>handleSubmit</code> is triggered when user hits the enter key.</p>
  
  <p>Is there a way to prevent that triggering? 
  I didn't find anything in the formik docs...</p>
  
  <p>Thanks.</p>