$ go get -u github.com/revel/cmd/revel
go: downloading github.com/jessevdk/go-flags v1.5.0
go: downloading golang.org/x/tools v0.1.8
go: downloading golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
go: downloading golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1
go: downloading golang.org/x/mod v0.5.1
go get: installing executables with 'go get' in module mode is deprecated.
        Use 'go install pkg@version' instead.
        For more information, see https://golang.org/doc/go-get-install-deprecation
        or run 'go help get' or 'go help install'.

go install github.com/revel/cmd/revel@latest