add getStickerSet call

bot.go

@@ -974,3 +974,22 @@ func (bot *BotAPI) DeleteChatPhoto(config DeleteChatPhotoConfig) (APIResponse, e
 
 	return bot.MakeRequest(config.method(), v)
 }
+
+// GetStickerSet get a sticker set.
+func (bot *BotAPI) GetStickerSet(config GetStickerSetConfig) (StickerSet, error) {
+	v, err := config.values()
+	if err != nil {
+		return StickerSet{}, err
+	}
+	bot.debugLog(config.method(), v, nil)
+	res, err := bot.MakeRequest(config.method(), v)
+	if err != nil {
+		return StickerSet{}, err
+	}
+	stickerSet := StickerSet{}
+	err = json.Unmarshal(res.Result, &stickerSet)
+	if err != nil {
+		return StickerSet{}, err
+	}
+	return stickerSet, nil
+}

configs.go

@@ -1262,3 +1262,18 @@ func (config DeleteChatPhotoConfig) values() (url.Values, error) {
 
 	return v, nil
 }
+
+// GetStickerSetConfig contains information for get sticker set.
+type GetStickerSetConfig struct {
+	Name string
+}
+
+func (config GetStickerSetConfig) method() string {
+	return "getStickerSet"
+}
+
+func (config GetStickerSetConfig) values() (url.Values, error) {
+	v := url.Values{}
+	v.Add("name", config.Name)
+	return v, nil
+}

types.go

@@ -348,6 +348,14 @@ type Sticker struct {
 	IsAnimated bool       `json:"is_animated"` // optional
 }
 
+type StickerSet struct {
+	Name          string    `json:"name"`
+	Title         string    `json:"title"`
+	IsAnimated    bool      `json:"is_animated"`
+	ContainsMasks bool      `json:"contains_masks"`
+	Stickers      []Sticker `json:"stickers"`
+}
+
 // ChatAnimation contains information about an animation.
 type ChatAnimation struct {
 	FileID    string     `json:"file_id"`