Embed an updating guide to v0.4.0 (README.md)
+<details>
+ <summary>FYI: Updating to v0.4.0</summary>
+
+ - `answer_str` -> `answer`
+ - Don't write `.send()` after each request, now it is done automatically.
+ - Use `.auto_send()` to construct your bot: `let bot = Bot::from_env().auto_send();`.
+ - `UpdateWithCx<Message>` -> `UpdateWithCx<AutoSend<Bot>, Message>`
+ - `ResponseResult<()>` -> `Result<(), Box<dyn Error + Send + Sync>>` (or import `ResponseResult` beforehand: `use teloxide::requests::ResponseResult;`)
+
+</details>
+
<div align="center">
<img src="ICON.png" width="250"/>
<h1>teloxide</h1>
@@ -178,7 +189,7 @@ async fn main() {
</div>
### Dialogues management
-A dialogue is described by an enumeration where each variant is one of possible dialogue's states. There are also _subtransition functions_, which turn a dialogue from one state to another, thereby forming a [FSM].
+A dialogue is described by an enumeration where each variant is one of possible dialogue's states. There are also _subtransition functions_, which turn a dialogue from one state to another, thereby forming an [FSM].
[FSM]: https://en.wikipedia.org/wiki/Finite-state_machine
