Bot API v5.2

• Support for Payments 2.0, see this manual for more details about the Bot Payments API.
• Added the type InputInvoiceMessageContent to support sending invoices as inline query results.
• Allowed sending invoices to group, supergroup and channel chats.
• Added the fields max_tip_amount and suggested_tip_amounts to the method sendInvoice to allow adding optional tips to the
  payment.
• The parameter start_parameter of the method sendInvoice became optional. If the parameter isn't specified, the invoice
  can be paid directly from forwarded messages.
• Added the field chat_type to the class InlineQuery, containing the type of the chat, from which the inline request was
  sent.
• Added the type VoiceChatScheduled and the field voice_chat_scheduled to the class Message.
• Fixed an error in sendChatAction documentation to correctly mention “record_voice” and “upload_voice” instead of
  “record_audio” and “upload_audio” for related to voice note actions. Old action names will still work for backward
  compatibility.