title: Quill onconflictupdate multiple values
body: <p>Is it in quill somehow possible to update multiple values on a conflict? E.g like this:</p>
  
  <pre><code>val a = quote {
    query[Product]
      .insert(_.id -&gt; 1, _.sku -&gt; 10)
      .onConflictUpdate((t, e) =&gt; t.sku -&gt; (t.sku + e.sku), t.abc -&gt; e.abc)
  }
  </code></pre>
  
  <p>I tried it like the way above and always got a "not found: value t" error when I had two values. The documentation also does not answer questions into this direction.</p>