add tests around MatchNamedCaptureGroups + rename

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

syft/pkg/cataloger/deb/parse_copyright.go

@@ -21,7 +21,7 @@ func parseLicensesFromCopyright(reader io.Reader) []string {
 	for scanner.Scan() {
 		line := scanner.Text()
 
-		matchesByGroup := internal.MatchCaptureGroups(licensePattern, line)
+		matchesByGroup := internal.MatchNamedCaptureGroups(licensePattern, line)
 		if len(matchesByGroup) > 0 {
 			candidate, ok := matchesByGroup["license"]
 			if !ok {

syft/pkg/cataloger/deb/parse_dpkg_status.go

@@ -145,7 +145,7 @@ func extractAllFields(reader *bufio.Reader) (map[string]interface{}, error) {
 // of the "<name>" form, then return name and nil
 func extractSourceVersion(source string) (string, string) {
 	// special handling for the Source field since it has formatted data
-	match := internal.MatchCaptureGroups(sourceRegexp, source)
+	match := internal.MatchNamedCaptureGroups(sourceRegexp, source)
 	return match["name"], match["version"]
 }