update changelog

changelog

fix MaskPosition (go-telegram#163)

- remove ci args for use default config
- make MaskPosition optional 
- Add check for nil in addFormFieldInputFileUpload (go-telegram#161) 
- Change type of Stickers field in CreateNewStickerSetParams struct (go-telegram#160)

8.3 (go-telegram#159)

* api 8.3

* changelog/ readme

- add option `WithInitialOffset(offset int64)` - allows to set initia…

…l offset for getUpdates method (go-telegram#148)

changelog

- add method `bot.ID() int64`

- add method `bot.Token() string`

update changelog

changelog

8.1 (go-telegram#137)

* api 8.1

* readme