Release 0.21.0

Features

• Ability of changing the node instance name (#1796)
• Lock kubeconfig file before accessing (#2230)
• Use aws-node 1.6.2 (#2288 #2289)

Improvements

• Use apps/v1 for Deployment for all K8s versions (#2238)
• Propagate SSH_AUTH_SOCK environment variable to git executor (#2083)

Bug Fixes

• Try to delete nodegroup for any nodegroup state (#2252)
• Fix bug in supporting non-default branches for gitops repos (#2246)
• Don't run extra cluster tasks and nodegroup creation in parallel (#2248)
• Fix update-cluster-endpoints panic when using a cluster config with missing VPC section (#2253)
• Make sure kubeconfig directory exists before locking (#2271 #2272)

Acknowledgments

Weaveworks would like to sincerely thank:
@aaronjwood, @danil-smirnov, @hiddeco, @mikestef9, @rndstr, @rodrigc and @spaghettifunk