bump version and update changelog

CHANGELOG.md

@@ -4,6 +4,15 @@ The format is based on [Keep a Changelog].
 
 [Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
 
+## 0.10.0 - 2023-11-09
+
+This release changes `IntoVisitor` to require that the corresponding `Visitor` implements `scale_decode::Error`, rather than allowing the error to be anything that can be converted into a `scale_decode::Error`. This has the following advantages:
+
+- It makes `DecodeAsType` a proper supertrait of `IntoVisitor`, meaning it can be used anywhere `IntoVisitor` is. Previously, using `DecodeAsType` in some places also required that you add a bound like `B: IntoVisitor, <B::Visitor as Visitor>::Error: Into<scale_decode::Error`, ie the `Error` type needed to explicitly be declared as convertible in the way that `DecodeAsType` requires.
+- It simplifies the code a little, making it a bit easier to understand how to correctly make a type implement `DecodeAsType`.
+
+The main drawback is that you can no longer have a `Visitor` implementation that returns a custom error type, and then also use that `Visitor` to build a `DecodeAsType` implementation; instead, any `Visitor` must use the `scale_decode::Error` up front. This is a shame, but hopefully not something that we'll run into in practice, since most implementations will come from the `#[derive(DecodeAsType)]` macro.
+
 ## 0.9.0 - 2023-08-02
 
 - Change how compact encoding is handled: `visit_compact_*` functions are removed from the `Visitor` trait, and

Cargo.toml

@@ -7,7 +7,7 @@ members = [
 resolver = "2"
 
 [workspace.package]
-version = "0.9.0"
+version = "0.10.0"
 authors = ["Parity Technologies <[email protected]>"]
 edition = "2021"
 license = "Apache-2.0"