Operator SDK v1.3.0

[estr...@redhat.com]

operator-sdk v1.3.0 has been released! This is a big release, namely that a new go CLI plugin go/v3 has been introduced and is now the default when `operator-sdk init` is run. All projects initialized with previous operator-sdk versions (which use go/v2) are still and will continue to be supported until v2.0.0. Some of the biggest updates that come with this new plugin:

• Kubernetes v1.19 support
  
• v1 CRD and webhook configuration support by default (v1beta1 is still supported)
• Liveness and readiness probes by default
• An option to use controller-runtime's component config to configure your operator

Additionally, the new `run bundle-upgrade` lets you test bundled operator upgrades in-cluster and is available to all project types. Enjoy!

Thanks all,

Eric