Pywa

- [reply_to_msg] adding `ReferredProduct` to message context
- [filters] adding filter for messages that has `referred_product` in their context
- [types] unfrozen editable types
- [base_update] hash updates by their update ID
- [client] adding `dl_session` param of type `requests.Session` to `.upload_media` when uploading locally from URL
- [errors] adding more `template` and `flow` exceptions; fix typo in `TooManyMessages`

- [reaction] hot-fix for reaction when "unreacting" to a message
- [filters] adding `.extensions(...)` filter for all media filters

- [callback] adding support for `Optional[x]` annotation in `CallbackData` subclasses
- [media] allowing to pass `pathlib.Path` as a media file path
- [system] make all fields nullable in system update

- [template] adding support for `OtpType.ZERO_TAP` in new authentication template
- [callback] adding support for optional fields in `CallbackData`
- [tests] update `CallbackData` tests

- [handlers] add `StopHandling` to raise if you want to stop handling the update
- [errors] include `requests.Response` with all api errors
- [client] mark `keyboard` argument in `.send_message` as deprecated. use `buttons` instead

- [webhook] allow to register callback url by david-lev in 18