Bump version to 21.0.0 (#1220)

* Version bump

* Bump: major v bump

Author: gyuheon0h

Cargo.lock

@@ -62,7 +62,7 @@ resolver = "2"
 [workspace.package]
 rust-version = "1.84.1"
 edition = "2021"
-version = "20.0.0"
+version = "21.0.0"
 license = "Apache-2.0"
 
 [profile.dev]