add setChatTitle and setChatDescription methods

bot.go

@@ -898,3 +898,27 @@ func (bot *BotAPI) UnpinChatMessage(config UnpinChatMessageConfig) (APIResponse,
 
 	return bot.MakeRequest(config.method(), v)
 }
+
+// SetChatTitle change title of chat.
+func (bot *BotAPI) SetChatTitle(config SetChatTitleConfig) (APIResponse, error) {
+	v, err := config.values()
+	if err != nil {
+		return APIResponse{}, err
+	}
+
+	bot.debugLog(config.method(), v, nil)
+
+	return bot.MakeRequest(config.method(), v)
+}
+
+// SetChatDescription change description of chat.
+func (bot *BotAPI) SetChatDescription(config SetChatDescriptionConfig) (APIResponse, error) {
+	v, err := config.values()
+	if err != nil {
+		return APIResponse{}, err
+	}
+
+	bot.debugLog(config.method(), v, nil)
+
+	return bot.MakeRequest(config.method(), v)
+}

configs.go

@@ -1038,8 +1038,8 @@ func (config DeleteMessageConfig) values() (url.Values, error) {
 
 // PinChatMessageConfig contains information of a message in a chat to pin.
 type PinChatMessageConfig struct {
-	ChatID int64
-	MessageID int
+	ChatID              int64
+	MessageID           int
 	DisableNotification bool
 }
 
@@ -1072,4 +1072,42 @@ func (config UnpinChatMessageConfig) values() (url.Values, error) {
 	v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
 
 	return v, nil
-}
+}
+
+// SetChatTitleConfig contains information for change chat title.
+type SetChatTitleConfig struct {
+	ChatID int64
+	Title  string
+}
+
+func (config SetChatTitleConfig) method() string {
+	return "setChatTitle"
+}
+
+func (config SetChatTitleConfig) values() (url.Values, error) {
+	v := url.Values{}
+
+	v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	v.Add("title", config.Title)
+
+	return v, nil
+}
+
+// SetChatDescriptionConfig contains information for change chat description.
+type SetChatDescriptionConfig struct {
+	ChatID      int64
+	Description string
+}
+
+func (config SetChatDescriptionConfig) method() string {
+	return "setChatDescription"
+}
+
+func (config SetChatDescriptionConfig) values() (url.Values, error) {
+	v := url.Values{}
+
+	v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	v.Add("description", config.Description)
+
+	return v, nil
+}