title: How to fix vsce not packaging code changes into .vsix file
body: <p>I'm developing an extension in vscode, and using <a href="https://www.npmjs.com/package/vsce" rel="nofollow noreferrer">vsce</a> to package it into a .vsix file. 
  I noticed a typo in my description in my extension's package.json, noticeable when the extension is installed and loaded in the extension tab. So I fixed it and re-ran <code>vsce package</code> in ~/extension_name/client/ and re-installed the extension, but the typo remains.</p>
  
  <p>I've double checked I'm not installing the wrong .vsix file. I've ran <code>npm install</code> in ~/extension_name/client/. I've even committed my changes to a branch in git, downloaded that branch and packaged it, no luck.</p>
  
  <p><strong>Do I need to run another command to get vsce to realise there are changes to include? How can I determine what version of the code vsce is packaging up?</strong></p>