title: How to set up Swashbuckle vs Microsoft.AspNetCore.Mvc.Versioning
body: <p>We have asp.net core webapi. We added <code>Microsoft.AspNetCore.Mvc.Versioning</code> and <code>Swashbuckle</code> to have swagger UI. 
  We specified controllers as this:</p>
  
  <pre><code>[ApiVersion("1.0")]
  [Route("api/v{version:apiVersion}/[controller]")]
  public class ContactController : Controller
  {
  </code></pre>
  
  <p>When we run swagger ui we get version as parameter in routes:
  <a href="https://i.stack.imgur.com/sVs4o.png" rel="noreferrer"><img src="https://i.stack.imgur.com/sVs4o.png" alt="enter image description here"></a></p>
  
  <p>How to set-up default "v1" for route ?
  If version 2 come to the stage how support swagger ui for both versions ?</p>