title: Install Cordova plugin without package.json file on it
body: <p>I'm trying to install a Cordova Plugin with Cordova CLI 7.</p>
  
  <p>This plugin does not have a package.json file on it, so it throws an error when adding it to my project.</p>
  
  <p>I've tried converting the config.xml file using plugman. And it works fine for Android but it doesn't for iOS. I feel like I'm missing some configuration from the config.xml in my package.json file.</p>
  
  <p>Is there a way to safely convert the config.xml in a package.json file? or a way to install it using the config.xml file?</p>
  
  <p>Thanks</p>