v6.0.0 Release The World!

Breaking Changes:

• Require explicit preparation for cloud environments. This removes the command cloud-login and requires use of prepare-gcloud and/or prepare-awscli commands
• Replaces ensure-kubectl with install-rok8s-requirements

New Features:

• Updates default kubectl version when installed from 1.4.0 to 1.7.2

Bug Fixes:

• Blocking jobs will exist with cod 124 if reaching a timeout
• k8s-example-config comment updates for name change -> rok8s-scripts, support of blocking jobs
• Fix permissions error when trying to update kubectl using gcloud