v2.0.1

• progress bar: use spinners for unknown blob sizes
• use 'containers_image_ostree' as build tag
• ostree: default is no OStree support
• Add "Env" to ImageInspectInfo
• config.go: improve debug message
• config.go: log where credentials come from
• Fix typo in docs/containers-registries.conf.5.md
• docker: delete: support all MIME types
• Try harder in storageImageDestination.TryReusingBlob
• docker: allow deleting OCI images
• ostree: improve error message