Currently, it's hard to work with offline Go modules.
The problem is, I don't have internet at home, so there is no way for me to make a change to the Go module I'm working on, because I can't push it to Github, which means that any projects I'm working on will continue to use the old version of my Go module.
Ideally, there would be a command that, if the current directory was part of a Go module, would update the Go module cash with any new changes / versions to the current Go module.