v0.6.1

Changelog

• e2cda69 Merge pull request #142 from vmware-labs/feature/push-metadata-tag
• e2b4cca Merge pull request #143 from vmware-labs/release/0.6.1
• 9443e54 Prepare release v0.6.1
• cd38339 fix: also push image-tag-based metadata tag when syncing container images