Convenience wrapper around `TelegramClient$send_message()` that resolves
futures/promises and returns the sent message (or Updates object).
Usage
send_message(client, entity, ...)
Arguments
- client
TelegramClient instance.
- entity
Target entity (username, id, or TLObject).
- ...
Passed to `TelegramClient$send_message()`.
Value
The sent message object (or Updates result).
