- Use "any" instead of an empty interface.
- Use range over an integer for for loops.
- Remove shadow variables in loops now that Go no longer reuses the variable.
- Use "slices.Contains", "slices.Delete", "slices.Equal", "slices.Index", "slices.SortFunc".
- Use "cmp.Or", "min", and "max".
- Use "fmt.Appendf" instead of "Sprintf" for generating a byte slice.
- Use "errors.Join" or "fmt.Errorf" with multiple "%w" for multiple errors.
Additionally, use modern regclient features:
- Use "ref.SetTag", "ref.SetDigest", and "ref.AddDigest".
- Call "regclient.ManifestGet" using "WithManifestDesc" instead of setting the digest on the reference.
Signed-off-by: Brandon Mitchell <git@bmitch.net>