update sdk version to 1.9.0

Author: merlinfuchs

README.md

@@ -4,6 +4,8 @@ Ergonomic Rust bindings to the [Discord Embedded App SDK](https://github.com/dis
 
 ## Features
 
+Currently bundled SDK version: `1.9.0`.
+
 - [x] Support for all commands
 - [x] Support for all events
 - [x] No JS required

activity-build/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "activity-build"
-version = "0.1.3"
+version = "0.9.0"
 edition = "2021"
 license = "MIT"
 description = "Build tool for Discord activities in Rust"