Release v1.0.0-alpha1

v1 alpha release.

• Adds kpt support.
• Adds general helm template like CLI.
• Supports helm 2.17.0.
• Adds forceNamespace config field to overwrite the namespace on all resources opposed to namespace which is just provided as default for Helm now.
• Adds kubeVersion config field.
• Removes the explicit lockFile config field (but keep Helm's requirements.lock behaviour) - for reliable auditing/preservation of a chart's contents please store its templated output within git or rather use a kpt-based workflow.
• Allows to explicitly enforce that only repositories listed within repositories.yaml are used or to trust in any repository.