Upgrade kubectl version in docker image.

[albertkang]

Expected behavior

expect kubectl to create secrets when using the image gcr.io/k8s-skaffold/skaffold:v0.15.0

Actual behavior

the following error happens
error: error validating "STDIN": error validating data: [apiVersion not set, kind not set]; if you choose to ignore these errors, turn validation off with --validate=false

Information

I think the kubectl version needs to be updated in the docker image needs to be updated from 1.10. kubernetes/kubectl#401.

[priyawadhwa]

@albertkang kubectl will be updated to 1.12.0 once #940 goes through.

[priyawadhwa]

Hey @albertkang, #940 was merged and kubectl v1.12.0 should be in all skaffold images v0.16.0+

I'll go ahead and close this issue, please comment or open another if you run into any more issues.