update kube and dependencies to v1.18.0.#39

Merged

k8s-ci-robot merged 2 commits intokubernetes-csi:masterfrom humblec:dep-update

Apr 14, 2020

+36,458-102,034

Commits on Apr 8, 2020

Update vendor dependencies
humblec
committed

Commits on Apr 14, 2020

vendor dir update.
humblec
committed