Upgrade spf13/cobra to v1.1.0 to fix zsh completion issue

[ysam12345]

Description

Upgrade version of spf13/cobra from v1.0.0 to v1.1.0 to fix #2747

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Added labels for change area (e.g. area/nodegroup), target version (e.g. version/0.12.0) and kind (e.g. kind/improvement)
• Make sure the title of the PR is a good description that can go into the release notes

[michaelbeaumont]

Thanks!

[michaelbeaumont]

It looks like the tests that check CLI output are failing. This is likely because the output has changed somehow between versions

[ysam12345]

It looks like the tests that check CLI output are failing. This is likely because the output has changed somehow between versions

Ok, I'll look into it.

[ysam12345]

@michaelbeaumont I found that is because RP spf13/cobra#894 changed some error output from stdOut to stdErr, so some of our test cases failed. I can fix it by adding stdErr to our output buffer, and all the test cases passed.

But I don't think this is the best practice, so I'll take some time to rewrite some code of unit test to fit the new spf13/cobra module.

[ysam12345]

Need more discuss in #2747.