Enable `pass` auto-completion in Zsh

Just thought I would share this tip with you since it would have saved me some of my time if I had this.

Add the following to your .zshrc file or whatever file it is that you want, just make sure it's loaded by Zsh:

autoload -U compinit
compinit

That enables auto-completion and loads it up. I'm not sure why I never had it enabled, but now it is.

You don't really need to do anything special anywhere else I don't think, that's the only thing I had to fix for it to work on my computer.

Hope that helps. :)