[Vendor] update go-swagger v0.21.0 -> v0.25.0 (#12670)

* Update go-swagger

* vendor

vendor/github.com/go-openapi/spec/license.go

@@ -14,10 +14,40 @@
 
 package spec
 
+import (
+	"encoding/json"
+
+	"github.com/go-openapi/swag"
+)
+
 // License information for the exposed API.
 //
 // For more information: http://goo.gl/8us55a#licenseObject
 type License struct {
+	LicenseProps
+	VendorExtensible
+}
+
+type LicenseProps struct {
 	Name string `json:"name,omitempty"`
 	URL  string `json:"url,omitempty"`
 }
+
+func (l *License) UnmarshalJSON(data []byte) error {
+	if err := json.Unmarshal(data, &l.LicenseProps); err != nil {
+		return err
+	}
+	return json.Unmarshal(data, &l.VendorExtensible)
+}
+
+func (l License) MarshalJSON() ([]byte, error) {
+	b1, err := json.Marshal(l.LicenseProps)
+	if err != nil {
+		return nil, err
+	}
+	b2, err := json.Marshal(l.VendorExtensible)
+	if err != nil {
+		return nil, err
+	}
+	return swag.ConcatJSON(b1, b2), nil
+}