npm names are case sensitive

Author: PFCM

packageurl.go

@@ -586,8 +586,7 @@ func typeAdjustName(purlType, name string, qualifiers Qualifiers) string {
 		TypeComposer,
 		TypeDebian,
 		TypeGithub,
-		TypeGolang,
-		TypeNPM:
+		TypeGolang:
 		return strings.ToLower(name)
 	case TypePyPi:
 		return strings.ToLower(strings.ReplaceAll(name, "_", "-"))

packageurl_test.go

@@ -528,11 +528,11 @@ func TestNormalize(t *testing.T) {
 	}, {
 		name: "known type name adjustments",
 		input: packageurl.PackageURL{
-			Type: "npm",
+			Type: "alpm",
 			Name: "nAmE",
 		},
 		want: packageurl.PackageURL{
-			Type:       "npm",
+			Type:       "alpm",
 			Name:       "name",
 			Qualifiers: packageurl.Qualifiers{},
 		},