chore: migrate to gitea

vendor/github.com/leodido/go-urn/urn8141.go

@@ -0,0 +1,30 @@
+package urn
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+const errInvalidURN8141 = "invalid URN per RFC 8141: %s"
+
+type URN8141 struct {
+	*URN
+}
+
+func (u URN8141) MarshalJSON() ([]byte, error) {
+	return json.Marshal(u.String())
+}
+
+func (u *URN8141) UnmarshalJSON(bytes []byte) error {
+	var str string
+	if err := json.Unmarshal(bytes, &str); err != nil {
+		return err
+	}
+	if value, ok := Parse([]byte(str), WithParsingMode(RFC8141Only)); !ok {
+		return fmt.Errorf(errInvalidURN8141, str)
+	} else {
+		*u = URN8141{value}
+	}
+
+	return nil
+}