fix(test): update client_integration version string 0.1.0 -> 0.1.3

Author: code-yeongyu

rust/crates/api/tests/client_integration.rs

@@ -82,7 +82,7 @@ async fn send_message_posts_json_and_parses_response() {
     );
     assert_eq!(
         request.headers.get("user-agent").map(String::as_str),
-        Some("claude-code/0.1.0")
+        Some("claude-code/0.1.3")
     );
     assert_eq!(
         request.headers.get("anthropic-beta").map(String::as_str),