title: GitHub URL for latest release of the _download file_?
body: <p>Although this question is <em>similar</em> to <a href="https://stackoverflow.com/questions/21439239/github-latest-release">GitHub latest release</a>, it's actually different -- it's about a link that means "the latest version of the download file itself".</p>
  
  <p>GitHub provides a "Latest" URL that redirects to the <em>information page</em> for the latest release. For example: <a href="https://github.com/reactiveui/ReactiveUI/releases/latest" rel="noreferrer">https://github.com/reactiveui/ReactiveUI/releases/latest</a> will redirect to <a href="https://github.com/reactiveui/ReactiveUI/releases/tag/5.99.6" rel="noreferrer">https://github.com/reactiveui/ReactiveUI/releases/tag/5.99.6</a> (as I type this; or to the page for a newer version, someday).</p>
  
  <p>That's great but I need a URL to the <em>download file itself</em>. In this example, the .zip file associated with the green download button,  <a href="https://github.com/reactiveui/ReactiveUI/releases/download/5.99.6/ReactiveUI-5.99.6.zip" rel="noreferrer">https://github.com/reactiveui/ReactiveUI/releases/download/5.99.6/ReactiveUI-5.99.6.zip</a> (as I type this; or to a newer zip file, someday).</p>
  
  <p>Why? I want to give the URL to curl, as part of a Travis CI script, to download the latest version.</p>
  
  <p>I guessed at a few URLs like /releases/download/<strong>latest</strong>/file.zip (substituting "latest" for the version part) and /releases/download/file.zip but those 404.</p>
  
  <p>Is there any way to do this -- in the context of a shell script and curl (note: <em>not</em> in a browser page with JS)?</p>