'go get' in module mode is deprecated

[deividaspetraitis]

Describe the bug
Unable to install ssh-manager

To Reproduce
Steps to reproduce the behavior:

go get -u github.com/omegion/ssh-manager
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'.

Expected behavior
I expect to build ssh-manager localy as per README

Environment:

• CLI Version (retrieve with ssh-manager version):
• Operating System/Architecture: Arch Linux

[omegion]

Thanks for the feedback @deividaspetraitis. I created a PR to use go install ... command instead. Alternatively, you can directly download binaries for your environment. You can find the instructions in README.