kubecfg fails to install with Go v1.16

[Rob]

When using Go v1.16 kubecfg fails to install:

$ go get -u github.com/bitnami/kubecfg
github.com/bitnami/kubecfg imports
	github.com/bitnami/kubecfg/cmd imports
	github.com/bitnami/kubecfg/utils imports
	github.com/googleapis/gnostic/OpenAPIv2: cannot find module providing package github.com/googleapis/gnostic/OpenAPIv2
$ go version
go version go1.16 linux/amd64

Confirmed that it works just fine in go1.15.