title: Always use latest version of nuget package
body: <p>Is their a way to automatically get the latest nuget package from a feed using the packages.config? For example:</p>
  
  <p>In my packages config I have:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;packages&gt;
    &lt;package id="Autofac" version="4.2.0" targetFramework="net452" /&gt;
    &lt;package id="MyOwn.ApiProxy" version="17.2.1.3" targetFramework="net452" /&gt;
    &lt;package id="Iesi.Collections" version="4.0.1.4000" targetFramework="net452" /&gt;
    &lt;package id="Newtonsoft.Json" version="9.0.1" targetFramework="net452" /&gt;
  &lt;/packages&gt;
  </code></pre>
  
  <p>In this packages.config, the version for MyOwn.ApiProxy is specified as version <code>17.2.1.3</code>, but version <code>17.2.1.4</code> is already in the (private) nuget feed. How can I automatically update my packages.config to get the latetst version of my package? Should I create a pre-build task, or is there someway to specify <code>latest</code> in the version?</p>
  
  <p>Using Visual Studio 2015 + NuGet server 2.11.2.0.</p>
  
  <p>Thanks</p>