New methods from bot api v3.5

Collect all api helper-methods in Client::ApiHelper module.
Add bin/fetch-telegram-methods to update methods list from website.

lib/telegram/bot/client/api_methods.txt

@@ -0,0 +1,68 @@
+# Generated with bin/fetch-telegram-methods
+# Bot API 3.5.
+
+getUpdates
+setWebhook
+deleteWebhook
+getWebhookInfo
+
+getMe
+sendMessage
+forwardMessage
+sendPhoto
+sendAudio
+sendDocument
+sendVideo
+sendVoice
+sendVideoNote
+sendMediaGroup
+sendLocation
+editMessageLiveLocation
+stopMessageLiveLocation
+sendVenue
+sendContact
+sendChatAction
+getUserProfilePhotos
+getFile
+kickChatMember
+unbanChatMember
+restrictChatMember
+promoteChatMember
+exportChatInviteLink
+setChatPhoto
+deleteChatPhoto
+setChatTitle
+setChatDescription
+pinChatMessage
+unpinChatMessage
+leaveChat
+getChat
+getChatAdministrators
+getChatMembersCount
+getChatMember
+setChatStickerSet
+deleteChatStickerSet
+answerCallbackQuery
+
+editMessageText
+editMessageCaption
+editMessageReplyMarkup
+deleteMessage
+
+sendSticker
+getStickerSet
+uploadStickerFile
+createNewStickerSet
+addStickerToSet
+setStickerPositionInSet
+deleteStickerFromSet
+
+answerInlineQuery
+
+sendInvoice
+answerShippingQuery
+answerPreCheckoutQuery
+
+sendGame
+setGameScore
+getGameHighScores