Looks for updates on github releases, update itself and restarts.

Just was an experiment. And abandoning now...!

• https://github.com/yitsushi/github-release-check

• https://github.com/yitsushi/totp-cli/blob/main/internal/cmd/update.go

• https://github.com/mouuff/go-rocket-update

• https://github.com/mouuff/go-rocket-update/blob/master/internal/fileio/patcher.go

• https://github.com/inconshreveable/go-update