Add ParseMode to PhotoConfig

configs.go

@@ -243,7 +243,8 @@ func (config ForwardConfig) method() string {
 // PhotoConfig contains information about a SendPhoto request.
 type PhotoConfig struct {
 	BaseFile
-	Caption string
+	Caption   string
+	ParseMode string
 }
 
 // Params returns a map[string]string representation of PhotoConfig.
@@ -253,6 +254,9 @@ func (config PhotoConfig) params() (map[string]string, error) {
 	if config.Caption != "" {
 		params["caption"] = config.Caption
 	}
+	if config.ParseMode != "" {
+		params["parse_mode"] = config.ParseMode
+	}
 
 	return params, nil
 }
@@ -268,6 +272,9 @@ func (config PhotoConfig) values() (url.Values, error) {
 	if config.Caption != "" {
 		v.Add("caption", config.Caption)
 	}
+	if config.ParseMode != "" {
+		v.Add("parse_mode", config.ParseMode)
+	}
 	return v, nil
 }