bump kubernetes dependencies and run go mod tidy

[tariq1890]

Checklist

• Update changelog in CHANGELOG.md, use section "Unreleased".

[tariq1890]

@seanmalloy FYI

[seanmalloy]

/lgtm
/assign @Raffo @njuettner

[seanmalloy]

/kind cleanup

[seanmalloy]

/lgtm

[seanmalloy]

I have confirmed using Go 1.14.7 that this is all good :

$ make clean && make build && go mod tidy

After running the above command git status show that the working directory is clean:

$ git status
On branch bump-k8s
Your branch is up to date with 'tariq1890/bump-k8s'.

nothing to commit, working tree clean

[njuettner]

/lgtm
/approve

[k8s-ci-robot]

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