I don't want to break people's muscle memory, but I also don't want to have the help output be messier than it needs to be.
Apparently this was *never* required? I just didn't know? Genuinely I have no idea what made me add this.
Eventually the "download" command will be changed to set the --no-install flag by default and "update" will become --update-only. For now remain backwards compatible to give people a chance to adjust their scripts and habits. Fixes #18