Integrity issue with Kustomize v4 support

[nasir-rabbani]

Terrascan uses the kustomize api v0.8.5 (sigs.k8s.io/kustomize/api v0.8.5) which is pinned to kustomize v4.0.5. This would mean that terrascan supports kustomize v4 .

But the command terrascan scan -i kustomize --iac-version v4 shows the below error:

2021-08-04T20:10:49.369+0530    error   runtime/validate.go:136 iac type 'kustomize', version 'v4' not supported
2021-08-04T20:10:49.369+0530    error   cli/run.go:114  scan run failed{error 26 0  iac type or version not supported}