kubelogin 1.28.1 (new formula)

[rrotter]

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[rrotter]

Added tests. Could skip the last one if we don't want to ping a 3rd party server. I hope the way I'm capturing the non-zero return status is acceptable. There's no way I'm aware of to do something useful with this tool and return zero without going through a full (successful) oauth login.

[chenrui333]

@rrotter, thanks for your contribution to Homebrew! 🎉 🥇

Without awesome contributors like you, it would be impossible to maintain Homebrew to the high level of quality users have come to expect. Thank you!!!!

[github-actions]

@chenrui333 has requested bottles to be published to this PR.