fix(integ tests): enable graceful-shutdown feature flag

Author: jlizen

lambda-integration-tests/Cargo.toml

@@ -12,7 +12,7 @@ keywords = ["AWS", "Lambda", "API"]
 readme = "../README.md"
 
 [dependencies]
-lambda_runtime = { path = "../lambda-runtime" }
+lambda_runtime = { path = "../lambda-runtime", features = ["tracing", "graceful-shutdown"] }
 aws_lambda_events = { path = "../lambda-events" }
 serde_json = "1.0.121"
 tokio = { version = "1", features = ["full"] }