update k8s.io dependencies to v0.17.0 to avoid go get issues

[ghouscht]

This PR updates the k8s dependencies to v0.17.0. The currenlty used version is quite old and causes some problems with the offical go modules proxy, so kube-prompt can't be installed with a simple go get:

go get -u github.com/c-bata/kube-prompt
go: finding github.com/c-bata/kube-prompt v1.0.10
go: downloading github.com/c-bata/kube-prompt v1.0.10
go: extracting github.com/c-bata/kube-prompt v1.0.10
go get: github.com/c-bata/kube-prompt@v1.0.10 requires
        k8s.io/client-go@v12.0.0+incompatible: reading https://proxy.golang.org/k8s.io/client-go/@v/v12.0.0+incompatible.mod: 410 Gone

This is also resolved with the updates deps 😃

[c-bata]

LGTM!!

[c-bata]

Thank you for your contribution!