Regression: Cannot return Kustomize version for 3.1.0

[alexec]

Checklist:

• I've searched in the docs and FAQ for my answer: http://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

Cannot return Kustomize version if <3.2.0.

To Reproduce

Install older kustomize - see error.

Expected behavior

Should display version.

Version

master

Logs

10:45:36  api-server | ERRO[0024] `kustomize version --short` failed exit status 1: Error: unknown flag: --short
10:45:36  api-server | Usage:
10:45:36  api-server |   kustomize version [flags]
10:45:36  api-server | Examples:
10:45:36  api-server | kustomize version
10:45:36  api-server | Flags:
10:45:36  api-server |   -h, --help   help for version  execID=IPlBk