Print output version message all on one line for easy parsing

[sophiewigmore]

Summary

Print out the newly added version message as a single line for easy parsing.

Use Cases

This is needed to unblock paketo-buildpacks/github-config#339, in which we want to parse the output of the command to get just the slice of versions.

Checklist

• I have viewed, signed, and submitted the Contributor License Agreement.
• I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• I have added an integration test, if necessary.
• I have reviewed the styleguide for guidance on my code quality.
• I'm happy with the commit history on this PR (I have rebased/squashed as needed).

[fg-j]

Output prints on one line, and on my machine this works great with the workflow from paketo-buildpacks/github-config#339