This release adds to the apps (helm charts, CLI installers) for Kubernetes clusters, plus DevOps / Infra CLIs using "arkade get"

New `arkade get` superpowers:

``` arkade get faas-cli

arkade get kubectl@v1.22.0

arkade get kubectl@v1.22.0 \ faas-cli \ inlets-pro@0.9.0 \ helm ```

New CockroachDB app:

``` arkade install cockroachdb ```

New Kasten sponsored app functionality for preflight checks

``` arkade kasten k10 preflight arkade kasten k10 preflight --dry-run ```