0.9.1

Telegram Bot API 9.1 support and new native transport 🎉

• Chg #160: Change PHP constraint in composer.json from php to php-64bit.
• New #155: Add NativeTransport that used native file_get_contents() and file_put_contents() functions.
• New #162: Add ChecklistTask, Checklist, InputChecklistTask, InputChecklist, ChecklistTasksDone,
  ChecklistTasksAdded and DirectMessagePriceChanged types.
• New #162: Add checklist, checklistTasksDone, checklistTasksAdded and directMessagePriceChanged fields to
  Message type.
• New #162: Add checklist field to ExternalReplyInfo type.
• New #162: Add sendChecklist, editMessageChecklist and getMyStarBalance methods.
• New #162: Add nextTransferDate field to OwnedGiftUnique type.
• New #162: Add nextTransferDate and lastResaleStarCount fields to UniqueGiftInfo type.