Changelog
User identifiers can now be bigger than 2^31 - 1 and it is no longer possible to store them in a signed 32-bit integer type. User identifiers have up to 52 significant bits, so a 64-bit integer or double-precision float type is safe for storing them. Please make sure that your code can correctly handle such user identifiers.
Announcement
Telebot V2 is no longer maintained — this is the last major version. Currently, we're working on V3, which is much more advanced and has tons of helpful features and continuous support. As there're not that many breaking changes between two APIs, consider migrating to the latest v3 branch as soon as the beta will be released.