title: onChange handler doesn't fire when using custom-component
body: <p>I'm using <a href="https://jaredpalmer.com/formik" rel="nofollow noreferrer">Formik</a> for validation in a React app.</p>
  
  <p>Validation is working correctly, but my onChange handler does not fire:</p>
  
  <pre><code>  &lt;Field
      type="text"
      name="name"
      placeholder="First Name"
      component={Input}
      onChange={() =&gt; console.log("gfdg")}
    /&gt;
  </code></pre>
  
  <p><a href="https://codesandbox.io/s/lp58rkkmkm" rel="nofollow noreferrer">Link to Sandbox</a></p>
  
  <p>Why is this?</p>