title: How to force composer to install even with missing extensions?
body: <p>I am attempting to install phpspreadsheet via composer on my Mac running macOS 10.15.  I know that this version of macOS doesn't have the php zip extension so composer isn't installing the library.  </p>
  
  <p>The thing is, the library is going to wind up on a server that does have the zip extension.  So, I really don't need for the zip extension to be on my Mac. I just need the library installed so I can upload the vendor folder to the server.</p>
  
  <p>How can I get composer to install it and ignore the extension check?  I don't have access to a shell on the server the site runs on so I can't install directly there.</p>