title: How do I downgrade Go from 1.10 to 1.9?
body: <p>I have a problem with debugging in Go 1.10 in vscode using delve on Mac.
  I read <a href="https://youtrack.jetbrains.com/issue/GO-5446" rel="nofollow noreferrer">here</a> that the workaround is to downgrade to Go 1.9.
  Since I am new at Go, but have lots of stuff already installed, how do I do this cleanly?</p>