Add support for package.json #200

Signed-off-by: Toure Dunnon <toure.dunnon@anchore.com>

syft/pkg/npm_metadata.go

@@ -0,0 +1,12 @@
+package pkg
+
+// NpmMetadata holds extra information that is used in pkg.Package
+type NpmMetadata struct {
+	Name        string   `mapstructure:"name" json:"name"`
+	Version     string   `mapstructure:"version" json:"version"`
+	Files       []string `mapstructure:"files" json:"files"`
+	Author      string   `mapstructure:"author" json:"author"`
+	License     string   `mapstructure:"license" json:"license"`
+	Homepage    string   `mapstructure:"homepage" json:"homepage"`
+	Description string   `mapstructure:"description" json:"description"`
+}

syft/pkg/package_test.go

@@ -69,14 +69,6 @@ func TestPackage_pURL(t *testing.T) {
 			},
 			expected: "pkg:npm/name@v0.1.0",
 		},
-		{
-			pkg: Package{
-				Name:    "name",
-				Version: "v0.1.0",
-				Type:    YarnPkg,
-			},
-			expected: "pkg:npm/name@v0.1.0",
-		},
 		{
 			distro: distro.Distro{
 				Type: distro.Ubuntu,

syft/pkg/type.go

@@ -6,17 +6,15 @@ import "github.com/package-url/packageurl-go"
 type Type string
 
 const (
-	UnknownPkg Type = "UnknownPackage"
-	ApkPkg     Type = "apk"
-	GemPkg     Type = "gem"
-	DebPkg     Type = "deb"
-	EggPkg     Type = "egg"
-	// PacmanPkg Type = "pacman"
+	UnknownPkg            Type = "UnknownPackage"
+	ApkPkg                Type = "apk"
+	GemPkg                Type = "gem"
+	DebPkg                Type = "deb"
+	EggPkg                Type = "egg"
 	RpmPkg                Type = "rpm"
 	WheelPkg              Type = "wheel"
 	PoetryPkg             Type = "poetry"
 	NpmPkg                Type = "npm"
-	YarnPkg               Type = "yarn"
 	PythonRequirementsPkg Type = "python-requirements"
 	PythonSetupPkg        Type = "python-setup"
 	JavaPkg               Type = "java-archive"
@@ -29,11 +27,9 @@ var AllPkgs = []Type{
 	GemPkg,
 	DebPkg,
 	EggPkg,
-	// PacmanPkg,
 	RpmPkg,
 	WheelPkg,
 	NpmPkg,
-	YarnPkg,
 	PythonRequirementsPkg,
 	PythonSetupPkg,
 	JavaPkg,
@@ -51,7 +47,7 @@ func (t Type) PackageURLType() string {
 		return "deb"
 	case EggPkg, WheelPkg, PythonRequirementsPkg, PythonSetupPkg:
 		return packageurl.TypePyPi
-	case NpmPkg, YarnPkg:
+	case NpmPkg:
 		return packageurl.TypeNPM
 	case JavaPkg, JenkinsPluginPkg:
 		return packageurl.TypeMaven