cache-control header combination not possible

It's not possible to set the following header with the current plugin logic:
`cache-control: private, max-age=0, no-cache, no-store`

as described here: https://mixmax.com/blog/chrome-back-button-cache-no-store

The fix would be relatively simple. 
I could even submit a PR but I wanted to check if this would somehow violate a standard which this plugin implements? Or that's not the case?