title: How do i find the 'from' Chart version at a helm upgrade?
body: <p>I am using helm built in object 'Release.isUpgrade' to ensure an init-container is only run at upgrade.</p>
  <p>I want to only run the init-container when upgrading from a specific Chart version.</p>
  <p>Is it possible to get the 'from' Chart version in a helm upgrade ?</p>