migrate pkg.ID and pkg.Relationship to artifact package

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

internal/formats/syftjson/to_format_model.go

@@ -3,6 +3,8 @@ package syftjson
 import (
 	"fmt"
 
+	"github.com/anchore/syft/syft/artifact"
+
 	"github.com/anchore/syft/syft/sbom"
 
 	"github.com/anchore/syft/internal"
@@ -87,14 +89,14 @@ func toPackageModel(p *pkg.Package) model.Package {
 	}
 }
 
-func toRelationshipModel(relationships []pkg.Relationship) []model.Relationship {
+func toRelationshipModel(relationships []artifact.Relationship) []model.Relationship {
 	result := make([]model.Relationship, len(relationships))
 	for i, r := range relationships {
 		result[i] = model.Relationship{
-			Parent:   string(r.Parent),
-			Child:    string(r.Child),
+			Parent:   string(r.From),
+			Child:    string(r.To),
 			Type:     string(r.Type),
-			Metadata: r.Metadata,
+			Metadata: r.Data,
 		}
 	}
 	return result

internal/formats/syftjson/to_syft_model.go

@@ -3,6 +3,7 @@ package syftjson
 import (
 	"github.com/anchore/syft/internal/formats/syftjson/model"
 	"github.com/anchore/syft/internal/log"
+	"github.com/anchore/syft/syft/artifact"
 	"github.com/anchore/syft/syft/distro"
 	"github.com/anchore/syft/syft/pkg"
 	"github.com/anchore/syft/syft/sbom"
@@ -61,7 +62,7 @@ func toSyftPackage(p model.Package) pkg.Package {
 	}
 
 	return pkg.Package{
-		ID:           pkg.ID(p.ID),
+		ID:           artifact.ID(p.ID),
 		Name:         p.Name,
 		Version:      p.Version,
 		FoundBy:      p.FoundBy,