Upgrade Rust Edition to 2024 from 2018

Author: jihchi

Cargo.toml

@@ -8,7 +8,7 @@ documentation = "https://docs.rs/dify"
 repository = "https://github.com/jihchi/dify.git"
 readme = "README.md"
 license = "MIT"
-edition = "2018"
+edition = "2024"
 include = [
   "src/**/*.rs",
   "Cargo.toml",