title: Getting error: 'WebHostBuilder' does not contain a definition for 'UseLamar'
body: <p>I see that there is support for ASP.NET Core 3.0 but what about 3.1? I've tried with no luck. Not sure if I am doing something dumb or if it is not supported?</p>
  
  <p>I've installed the latest Nuget Packages:</p>
  
  <ul>
  <li>Lamar 4.0.0 </li>
  <li>Lamar.Microsoft.DependencyInjection 4.0.2</li>
  </ul>
  
  <p>And I am using:</p>
  
  <pre><code>var builder = new WebHostBuilder();
  builder.UseLamar()
  </code></pre>
  
  <p>The file includes <code>using Lamar.Microsoft.DependencyInjection;</code> at the top.</p>
  
  <p>But getting error: 
  'WebHostBuilder' does not contain a definition for 'UseLamar'.</p>