image-syncer: v1.5.0

New features

• Skip synchronizing list type image if manifest is unchanged.
• Support synchronizing images with only specific digest.
• Make everything (analyzing image rules, generating sync tasks, synchronizing a manifest/blob) a "task" and be excuted concurrently.
• Refactor logs, add time metrics and proccess infomation.
• Add "--force" flag for updating unchanged manifests.

Improvements

• Change default dockerhub url to dockerhub.io.
• Remove --namespace flag.
• Refactor the whole project for better structure.
• Return error code if failed tasks exist.
• Use github action synctest for function test.

Fixed Issues

• Occasional problems of multi-platform manifestlist be pushed as single-platform manifest.